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MdePkg[all]
1.08
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MdePkg[all]
1.08
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Data Structures | |
| struct | BASE_LIBRARY_JUMP_BUFFER |
| union | IA32_FLAGS16 |
| union | IA32_EFLAGS32 |
| union | IA32_CR0 |
| union | IA32_CR4 |
| union | IA32_SEGMENT_DESCRIPTOR |
| struct | IA32_DESCRIPTOR |
| union | IA32_IDT_GATE_DESCRIPTOR |
| struct | IA32_TASK_STATE_SEGMENT |
| union | IA32_TSS_DESCRIPTOR |
| struct | IA32_TASK_STATE_SEGMENT |
| union | IA32_TSS_DESCRIPTOR |
| struct | IA32_FX_BUFFER |
| struct | IA32_BYTE_REGS |
| struct | IA32_WORD_REGS |
| struct | IA32_DWORD_REGS |
| union | IA32_REGISTER_SET |
| struct | THUNK_CONTEXT |
Typedefs | |
| typedef INTN(EFIAPI * | BASE_SORT_COMPARE )(IN CONST VOID *Buffer1, IN CONST VOID *Buffer2) |
| typedef VOID(EFIAPI * | SWITCH_STACK_ENTRY_POINT )(IN VOID *Context1, IN VOID *Context2) |
| typedef VOID( | X86_ASSEMBLY_PATCH_LABEL )(VOID) |
Enumerations | |
| enum | PVALIDATE_PAGE_SIZE { PvalidatePageSize4K = 0, PvalidatePageSize2MB } |
Provides string functions, linked list functions, math functions, synchronization functions, file path functions, and CPU architecture-specific functions.
Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.
Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
Copyright (c) Microsoft Corporation.
Portions Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
| #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 4 |
| #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8 |
| #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8 |
| #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 4 |
| #define BASE_LIST_FOR_EACH | ( | Entry, | |
| ListHead | |||
| ) | for(Entry = (ListHead)->ForwardLink; Entry != (ListHead); Entry = Entry->ForwardLink) |
Iterates over each node in a doubly linked list using each node's forward link.
| Entry | A pointer to a list node used as a loop cursor during iteration |
| ListHead | The head node of the doubly linked list |
| #define BASE_LIST_FOR_EACH_SAFE | ( | Entry, | |
| NextEntry, | |||
| ListHead | |||
| ) |
Iterates over each node in a doubly linked list using each node's forward link with safety against node removal.
This macro uses NextEntry to temporarily store the next list node so the node pointed to by Entry may be deleted in the current loop iteration step and iteration can continue from the node pointed to by NextEntry.
| Entry | A pointer to a list node used as a loop cursor during iteration |
| NextEntry | A pointer to a list node used to temporarily store the next node |
| ListHead | The head node of the doubly linked list |
| #define GUID_STRING_LENGTH 36 |
| #define IA32_GDT_ALIGNMENT 8 |
| #define IA32_GDT_TYPE_TSS 0x9 |
| #define IA32_IDT_GATE_TYPE_INTERRUPT_16 0x86 |
| #define IA32_IDT_GATE_TYPE_INTERRUPT_32 0x8E |
| #define IA32_IDT_GATE_TYPE_TASK 0x85 |
| #define IA32_IDT_GATE_TYPE_TRAP_16 0x87 |
| #define IA32_IDT_GATE_TYPE_TRAP_32 0x8F |
| #define INITIALIZE_LIST_HEAD_VARIABLE | ( | ListHead | ) | {&(ListHead), &(ListHead)} |
Initializes the head node of a doubly linked list that is declared as a global variable in a module.
Initializes the forward and backward links of a new linked list. After initializing a linked list with this macro, the other linked list functions may be used to add and remove nodes from the linked list. This macro results in smaller executables by initializing the linked list in the data section, instead if calling the InitializeListHead() function to perform the equivalent operation.
| ListHead | The head note of a list to initialize. |
| #define PVALIDATE_RET_FAIL_INPUT 1 |
| #define PVALIDATE_RET_NO_RMPUPDATE 255 |
| #define PVALIDATE_RET_SIZE_MISMATCH 6 |
| #define PVALIDATE_RET_SUCCESS 0 |
| #define RMPADJUST_PERMISSION_MASK_MASK 0xFF |
| #define RMPADJUST_PERMISSION_MASK_SHIFT 8 |
| #define RMPADJUST_VMPL_MASK 0xFF |
| #define RMPADJUST_VMPL_MAX 3 |
| #define RMPADJUST_VMPL_SHIFT 0 |
| #define RMPADJUST_VMSA_PAGE_BIT BIT16 |
| #define THUNK_ATTRIBUTE_BIG_REAL_MODE 0x00000001 |
| #define THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 0x00000002 |
| #define THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL 0x00000004 |
Prototype for comparison function for any two element types.
| [in] | Buffer1 | The pointer to first buffer. |
| [in] | Buffer2 | The pointer to second buffer. |
| 0 | Buffer1 equal to Buffer2. |
Function entry point used when a stack switch is requested with SwitchStack()
| Context1 | Context1 parameter passed into SwitchStack(). |
| Context2 | Context2 parameter passed into SwitchStack(). |
Type definition for representing labels in NASM source code that allow for the patching of immediate operands of IA32 and X64 instructions.
While the type is technically defined as a function type (note: not a pointer-to-function type), such labels in NASM source code never stand for actual functions, and identifiers declared with this function type should never be called. This is also why the EFIAPI calling convention specifier is missing from the typedef, and why the typedef does not follow the usual edk2 coding style for function (or pointer-to-function) typedefs. The VOID return type and the VOID argument list are merely artifacts.
| enum PVALIDATE_PAGE_SIZE |
Shifts a 64-bit integer right between 0 and 63 bits. The high bits are filled with original integer's bit 63. The shifted value is returned.
This function shifts the 64-bit value Operand to the right by Count bits. The high Count bits are set to bit 63 of Operand. The shifted value is returned.
If Count is greater than 63, then ASSERT().
| Operand | The 64-bit operand to shift right. |
| Count | The number of bits to shift right. |
| RETURN_STATUS EFIAPI AsciiStrCatS | ( | IN OUT CHAR8 * | Destination, |
| IN UINTN | DestMax, | ||
| IN CONST CHAR8 * | Source | ||
| ) |
Appends a copy of the string pointed to by Source (including the terminating null char) to the end of the string pointed to by Destination.
This function is similar as strcat_s defined in C11.
If an error is returned, then the Destination is unmodified.
| Destination | A pointer to a Null-terminated Ascii string. |
| DestMax | The maximum number of Destination Ascii char, including terminating null char. |
| Source | A pointer to a Null-terminated Ascii string. |
| RETURN_SUCCESS | String is appended. |
| RETURN_BAD_BUFFER_SIZE | If DestMax is NOT greater than StrLen(Destination). |
| RETURN_BUFFER_TOO_SMALL | If (DestMax - StrLen(Destination)) is NOT greater than StrLen(Source). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumAsciiStringLength is not zero, and DestMax is greater than PcdMaximumAsciiStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
Compares two Null-terminated ASCII strings, and returns the difference between the first mismatched ASCII characters.
This function compares the Null-terminated ASCII string FirstString to the Null-terminated ASCII string SecondString. If FirstString is identical to SecondString, then 0 is returned. Otherwise, the value returned is the first mismatched ASCII character in SecondString subtracted from the first mismatched ASCII character in FirstString.
If FirstString is NULL, then ASSERT(). If SecondString is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero and FirstString contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT(). If PcdMaximumAsciiStringLength is not zero and SecondString contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT().
| FirstString | The pointer to a Null-terminated ASCII string. |
| SecondString | The pointer to a Null-terminated ASCII string. |
| ==0 | FirstString is identical to SecondString. |
| !=0 | FirstString is not identical to SecondString. |
| RETURN_STATUS EFIAPI AsciiStrCpyS | ( | OUT CHAR8 * | Destination, |
| IN UINTN | DestMax, | ||
| IN CONST CHAR8 * | Source | ||
| ) |
Copies the string pointed to by Source (including the terminating null char) to the array pointed to by Destination.
This function is similar as strcpy_s defined in C11.
If an error is returned, then the Destination is unmodified.
| Destination | A pointer to a Null-terminated Ascii string. |
| DestMax | The maximum number of Destination Ascii char, including terminating null char. |
| Source | A pointer to a Null-terminated Ascii string. |
| RETURN_SUCCESS | String is copied. |
| RETURN_BUFFER_TOO_SMALL | If DestMax is NOT greater than StrLen(Source). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumAsciiStringLength is not zero, and DestMax is greater than PcdMaximumAsciiStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
Convert a Null-terminated ASCII decimal string to a value of type UINT64.
This function returns a value of type UINT64 by interpreting the contents of the ASCII string String as a decimal number. The format of the input ASCII string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The function will ignore the pad space, which includes spaces or tab characters, before the digits. The running zero in the beginning of [decimal digits] will be ignored. Then, the function stops at the first character that is a not a valid decimal character or Null-terminator, whichever on comes first.
If String has only pad spaces, then 0 is returned. If String has no pad spaces or valid decimal digits, then 0 is returned. If the number represented by String overflows according to the range defined by UINT64, then MAX_UINT64 is returned. If String is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero, and String contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated ASCII string. |
| Value | translated from String. |
| RETURN_STATUS EFIAPI AsciiStrDecimalToUint64S | ( | IN CONST CHAR8 * | String, |
| OUT CHAR8 ** | EndPointer, | ||
| OUT UINT64 * | Data | ||
| ) |
Convert a Null-terminated Ascii decimal string to a value of type UINT64.
This function outputs a value of type UINT64 by interpreting the contents of the Ascii string specified by String as a decimal number. The format of the input Ascii string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The function will ignore the pad space, which includes spaces or tab characters, before [decimal digits]. The running zero in the beginning of [decimal digits] will be ignored. Then, the function stops at the first character that is a not a valid decimal character or a Null-terminator, whichever one comes first.
If String has no valid decimal digits in the above format, then 0 is stored at the location pointed to by Data. If the number represented by String exceeds the range defined by UINT64, then MAX_UINT64 is stored at the location pointed to by Data.
If EndPointer is not NULL, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer. If String has no valid decimal digits right after the optional pad spaces, the value of String is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Ascii string. |
| EndPointer | Pointer to character that stops scan. |
| Data | Pointer to the converted value. |
| RETURN_SUCCESS | Value is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If PcdMaximumAsciiStringLength is not zero, and String contains more than PcdMaximumAsciiStringLength Ascii characters, not including the Null-terminator. |
| RETURN_UNSUPPORTED | If the number represented by String exceeds the range defined by UINT64. |
Convert a Null-terminated ASCII decimal string to a value of type UINTN.
This function returns a value of type UINTN by interpreting the contents of the ASCII string String as a decimal number. The format of the input ASCII string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The function will ignore the pad space, which includes spaces or tab characters, before the digits. The running zero in the beginning of [decimal digits] will be ignored. Then, the function stops at the first character that is a not a valid decimal character or Null-terminator, whichever on comes first.
If String has only pad spaces, then 0 is returned. If String has no pad spaces or valid decimal digits, then 0 is returned. If the number represented by String overflows according to the range defined by UINTN, then MAX_UINTN is returned. If String is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero, and String contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated ASCII string. |
| The | value translated from String. |
| RETURN_STATUS EFIAPI AsciiStrDecimalToUintnS | ( | IN CONST CHAR8 * | String, |
| OUT CHAR8 ** | EndPointer, | ||
| OUT UINTN * | Data | ||
| ) |
Convert a Null-terminated Ascii decimal string to a value of type UINTN.
This function outputs a value of type UINTN by interpreting the contents of the Ascii string specified by String as a decimal number. The format of the input Ascii string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The function will ignore the pad space, which includes spaces or tab characters, before [decimal digits]. The running zero in the beginning of [decimal digits] will be ignored. Then, the function stops at the first character that is a not a valid decimal character or a Null-terminator, whichever one comes first.
If String has no valid decimal digits in the above format, then 0 is stored at the location pointed to by Data. If the number represented by String exceeds the range defined by UINTN, then MAX_UINTN is stored at the location pointed to by Data.
If EndPointer is not NULL, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer. If String has no valid decimal digits right after the optional pad spaces, the value of String is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Ascii string. |
| EndPointer | Pointer to character that stops scan. |
| Data | Pointer to the converted value. |
| RETURN_SUCCESS | Value is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If PcdMaximumAsciiStringLength is not zero, and String contains more than PcdMaximumAsciiStringLength Ascii characters, not including the Null-terminator. |
| RETURN_UNSUPPORTED | If the number represented by String exceeds the range defined by UINTN. |
| RETURN_STATUS EFIAPI AsciiStrHexToBytes | ( | IN CONST CHAR8 * | String, |
| IN UINTN | Length, | ||
| OUT UINT8 * | Buffer, | ||
| IN UINTN | MaxBufferSize | ||
| ) |
Convert a Null-terminated ASCII hexadecimal string to a byte array.
This function outputs a byte array by interpreting the contents of the ASCII string specified by String in hexadecimal format. The format of the input ASCII string String is:
[XX]*
X is a hexadecimal digit character in the range [0-9], [a-f] and [A-F]. The function decodes every two hexadecimal digit characters as one byte. The decoding stops after Length of characters and outputs Buffer containing (Length / 2) bytes.
| String | Pointer to a Null-terminated ASCII string. |
| Length | The number of ASCII characters to decode. |
| Buffer | Pointer to the converted bytes array. |
| MaxBufferSize | The maximum size of Buffer. |
| RETURN_SUCCESS | Buffer is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If Length is not multiple of 2. If PcdMaximumAsciiStringLength is not zero, and Length is greater than PcdMaximumAsciiStringLength. |
| RETURN_UNSUPPORTED | If Length of characters from String contain a character that is not valid hexadecimal digit characters, or a Null-terminator. |
| RETURN_BUFFER_TOO_SMALL | If MaxBufferSize is less than (Length / 2). |
Convert a Null-terminated ASCII hexadecimal string to a value of type UINT64.
This function returns a value of type UINT64 by interpreting the contents of the ASCII string String as a hexadecimal number. The format of the input ASCII string String is:
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" appears in the input string, it must be prefixed with at least one 0. The function will ignore the pad space, which includes spaces or tab characters, before [zeros], [x] or [hexadecimal digits]. The running zero before [x] or [hexadecimal digits] will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal digit. Then, the function stops at the first character that is a not a valid hexadecimal character or Null-terminator, whichever on comes first.
If String has only pad spaces, then 0 is returned. If String has no leading pad spaces, leading zeros or valid hexadecimal digits, then 0 is returned.
If the number represented by String overflows according to the range defined by UINT64, then MAX_UINT64 is returned. If String is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero, and String contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated ASCII string. |
| Value | translated from String. |
| RETURN_STATUS EFIAPI AsciiStrHexToUint64S | ( | IN CONST CHAR8 * | String, |
| OUT CHAR8 ** | EndPointer, | ||
| OUT UINT64 * | Data | ||
| ) |
Convert a Null-terminated Ascii hexadecimal string to a value of type UINT64.
This function outputs a value of type UINT64 by interpreting the contents of the Ascii string specified by String as a hexadecimal number. The format of the input Ascii string String is:
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" appears in the input string, it must be prefixed with at least one 0. The function will ignore the pad space, which includes spaces or tab characters, before [zeros], [x] or [hexadecimal digits]. The running zero before [x] or [hexadecimal digits] will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal digit. Then, the function stops at the first character that is a not a valid hexadecimal character or Null-terminator, whichever on comes first.
If String has no valid hexadecimal digits in the above format, then 0 is stored at the location pointed to by Data. If the number represented by String exceeds the range defined by UINT64, then MAX_UINT64 is stored at the location pointed to by Data.
If EndPointer is not NULL, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer. If String has no valid hexadecimal digits right after the optional pad spaces, the value of String is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Ascii string. |
| EndPointer | Pointer to character that stops scan. |
| Data | Pointer to the converted value. |
| RETURN_SUCCESS | Value is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If PcdMaximumAsciiStringLength is not zero, and String contains more than PcdMaximumAsciiStringLength Ascii characters, not including the Null-terminator. |
| RETURN_UNSUPPORTED | If the number represented by String exceeds the range defined by UINT64. |
Convert a Null-terminated ASCII hexadecimal string to a value of type UINTN.
This function returns a value of type UINTN by interpreting the contents of the ASCII string String as a hexadecimal number. The format of the input ASCII string String is:
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" appears in the input string, it must be prefixed with at least one 0. The function will ignore the pad space, which includes spaces or tab characters, before [zeros], [x] or [hexadecimal digits]. The running zero before [x] or [hexadecimal digits] will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal digit. Then, the function stops at the first character that is a not a valid hexadecimal character or Null-terminator, whichever on comes first.
If String has only pad spaces, then 0 is returned. If String has no leading pad spaces, leading zeros or valid hexadecimal digits, then 0 is returned.
If the number represented by String overflows according to the range defined by UINTN, then MAX_UINTN is returned. If String is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero, and String contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated ASCII string. |
| Value | translated from String. |
| RETURN_STATUS EFIAPI AsciiStrHexToUintnS | ( | IN CONST CHAR8 * | String, |
| OUT CHAR8 ** | EndPointer, | ||
| OUT UINTN * | Data | ||
| ) |
Convert a Null-terminated Ascii hexadecimal string to a value of type UINTN.
This function outputs a value of type UINTN by interpreting the contents of the Ascii string specified by String as a hexadecimal number. The format of the input Ascii string String is:
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" appears in the input string, it must be prefixed with at least one 0. The function will ignore the pad space, which includes spaces or tab characters, before [zeros], [x] or [hexadecimal digits]. The running zero before [x] or [hexadecimal digits] will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal digit. Then, the function stops at the first character that is a not a valid hexadecimal character or Null-terminator, whichever on comes first.
If String has no valid hexadecimal digits in the above format, then 0 is stored at the location pointed to by Data. If the number represented by String exceeds the range defined by UINTN, then MAX_UINTN is stored at the location pointed to by Data.
If EndPointer is not NULL, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer. If String has no valid hexadecimal digits right after the optional pad spaces, the value of String is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Ascii string. |
| EndPointer | Pointer to character that stops scan. |
| Data | Pointer to the converted value. |
| RETURN_SUCCESS | Value is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If PcdMaximumAsciiStringLength is not zero, and String contains more than PcdMaximumAsciiStringLength Ascii characters, not including the Null-terminator. |
| RETURN_UNSUPPORTED | If the number represented by String exceeds the range defined by UINTN. |
Performs a case insensitive comparison of two Null-terminated ASCII strings, and returns the difference between the first mismatched ASCII characters.
This function performs a case insensitive comparison of the Null-terminated ASCII string FirstString to the Null-terminated ASCII string SecondString. If FirstString is identical to SecondString, then 0 is returned. Otherwise, the value returned is the first mismatched lower case ASCII character in SecondString subtracted from the first mismatched lower case ASCII character in FirstString.
If FirstString is NULL, then ASSERT(). If SecondString is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero and FirstString contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT(). If PcdMaximumAsciiStringLength is not zero and SecondString contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT().
| FirstString | The pointer to a Null-terminated ASCII string. |
| SecondString | The pointer to a Null-terminated ASCII string. |
| ==0 | FirstString is identical to SecondString using case insensitive comparisons. |
| !=0 | FirstString is not identical to SecondString using case insensitive comparisons. |
Returns the length of a Null-terminated ASCII string.
This function returns the number of ASCII characters in the Null-terminated ASCII string specified by String.
If Length > 0 and Destination is NULL, then ASSERT(). If Length > 0 and Source is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero and String contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated ASCII string. |
| RETURN_STATUS EFIAPI AsciiStrnCatS | ( | IN OUT CHAR8 * | Destination, |
| IN UINTN | DestMax, | ||
| IN CONST CHAR8 * | Source, | ||
| IN UINTN | Length | ||
| ) |
Appends not more than Length successive char from the string pointed to by Source to the end of the string pointed to by Destination. If no null char is copied from Source, then Destination[StrLen(Destination) + Length] is always set to null.
This function is similar as strncat_s defined in C11.
If an error is returned, then the Destination is unmodified.
| Destination | A pointer to a Null-terminated Ascii string. |
| DestMax | The maximum number of Destination Ascii char, including terminating null char. |
| Source | A pointer to a Null-terminated Ascii string. |
| Length | The maximum number of Ascii characters to copy. |
| RETURN_SUCCESS | String is appended. |
| RETURN_BAD_BUFFER_SIZE | If DestMax is NOT greater than StrLen(Destination). |
| RETURN_BUFFER_TOO_SMALL | If (DestMax - StrLen(Destination)) is NOT greater than MIN(StrLen(Source), Length). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumAsciiStringLength is not zero, and DestMax is greater than PcdMaximumAsciiStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
| INTN EFIAPI AsciiStrnCmp | ( | IN CONST CHAR8 * | FirstString, |
| IN CONST CHAR8 * | SecondString, | ||
| IN UINTN | Length | ||
| ) |
Compares two Null-terminated ASCII strings with maximum lengths, and returns the difference between the first mismatched ASCII characters.
This function compares the Null-terminated ASCII string FirstString to the Null-terminated ASCII string SecondString. At most, Length ASCII characters will be compared. If Length is 0, then 0 is returned. If FirstString is identical to SecondString, then 0 is returned. Otherwise, the value returned is the first mismatched ASCII character in SecondString subtracted from the first mismatched ASCII character in FirstString.
If Length > 0 and FirstString is NULL, then ASSERT(). If Length > 0 and SecondString is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero, and Length is greater than PcdMaximumAsciiStringLength, then ASSERT(). If PcdMaximumAsciiStringLength is not zero, and FirstString contains more than PcdMaximumAsciiStringLength ASCII characters, not including the Null-terminator, then ASSERT(). If PcdMaximumAsciiStringLength is not zero, and SecondString contains more than PcdMaximumAsciiStringLength ASCII characters, not including the Null-terminator, then ASSERT().
| FirstString | The pointer to a Null-terminated ASCII string. |
| SecondString | The pointer to a Null-terminated ASCII string. |
| Length | The maximum number of ASCII characters for compare. |
| ==0 | FirstString is identical to SecondString. |
| !=0 | FirstString is not identical to SecondString. |
| RETURN_STATUS EFIAPI AsciiStrnCpyS | ( | OUT CHAR8 * | Destination, |
| IN UINTN | DestMax, | ||
| IN CONST CHAR8 * | Source, | ||
| IN UINTN | Length | ||
| ) |
Copies not more than Length successive char from the string pointed to by Source to the array pointed to by Destination. If no null char is copied from Source, then Destination[Length] is always set to null.
This function is similar as strncpy_s defined in C11.
If an error is returned, then the Destination is unmodified.
| Destination | A pointer to a Null-terminated Ascii string. |
| DestMax | The maximum number of Destination Ascii char, including terminating null char. |
| Source | A pointer to a Null-terminated Ascii string. |
| Length | The maximum number of Ascii characters to copy. |
| RETURN_SUCCESS | String is copied. |
| RETURN_BUFFER_TOO_SMALL | If DestMax is NOT greater than MIN(StrLen(Source), Length). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumAsciiStringLength is not zero, and DestMax is greater than PcdMaximumAsciiStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
Returns the length of a Null-terminated Ascii string.
This function is similar as strlen_s defined in C11.
| String | A pointer to a Null-terminated Ascii string. |
| MaxSize | The maximum number of Destination Ascii char, including terminating null char. |
| 0 | If String is NULL. |
| MaxSize | If there is no null character in the first MaxSize characters of String. |
Returns the size of a Null-terminated Ascii string in bytes, including the Null terminator.
This function returns the size of the Null-terminated Ascii string specified by String in bytes, including the Null terminator.
| String | A pointer to a Null-terminated Ascii string. |
| MaxSize | The maximum number of Destination Ascii char, including the Null terminator. |
| 0 | If String is NULL. |
| (sizeof | (CHAR8) * (MaxSize + 1)) If there is no Null terminator in the first MaxSize characters of String. |
| RETURN_STATUS EFIAPI AsciiStrnToUnicodeStrS | ( | IN CONST CHAR8 * | Source, |
| IN UINTN | Length, | ||
| OUT CHAR16 * | Destination, | ||
| IN UINTN | DestMax, | ||
| OUT UINTN * | DestinationLength | ||
| ) |
Convert not more than Length successive characters from a Null-terminated Ascii string to a Null-terminated Unicode string. If no null char is copied from Source, then Destination[Length] is always set to null.
This function converts not more than Length successive characters from the Ascii string Source to the Unicode string Destination. The function terminates the Unicode string Destination by appending a Null-terminator character at the end.
The caller is responsible to make sure Destination points to a buffer with size not smaller than ((MIN(AsciiStrLen(Source), Length) + 1) * sizeof (CHAR8)) in bytes.
If Destination is not aligned on a 16-bit boundary, then ASSERT().
If an error is returned, then Destination and DestinationLength are unmodified.
| Source | The pointer to a Null-terminated Ascii string. |
| Length | The maximum number of Ascii characters to convert. |
| Destination | The pointer to a Null-terminated Unicode string. |
| DestMax | The maximum number of Destination Unicode char, including terminating null char. |
| DestinationLength | The number of Ascii characters converted. |
| RETURN_SUCCESS | String is converted. |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If DestinationLength is NULL. If PcdMaximumUnicodeStringLength is not zero, and Length or DestMax is greater than PcdMaximumUnicodeStringLength. If PcdMaximumAsciiStringLength is not zero, and Length or DestMax is greater than PcdMaximumAsciiStringLength. If DestMax is 0. |
| RETURN_BUFFER_TOO_SMALL | If DestMax is NOT greater than MIN(AsciiStrLen(Source), Length). |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
Returns the size of a Null-terminated ASCII string in bytes, including the Null terminator.
This function returns the size, in bytes, of the Null-terminated ASCII string specified by String.
If String is NULL, then ASSERT(). If PcdMaximumAsciiStringLength is not zero and String contains more than PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated ASCII string. |
Returns the first occurrence of a Null-terminated ASCII sub-string in a Null-terminated ASCII string.
This function scans the contents of the ASCII string specified by String and returns the first occurrence of SearchString. If SearchString is not found in String, then NULL is returned. If the length of SearchString is zero, then String is returned.
If String is NULL, then ASSERT(). If SearchString is NULL, then ASSERT().
If PcdMaximumAsciiStringLength is not zero, and SearchString or String contains more than PcdMaximumAsciiStringLength Unicode characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated ASCII string. |
| SearchString | The pointer to a Null-terminated ASCII string to search for. |
| NULL | If the SearchString does not appear in String. |
| others | If there is a match return the first occurrence of SearchingString. If the length of SearchString is zero,return String. |
Convert a Null-terminated ASCII GUID string to a value of type EFI_GUID.
This function outputs a GUID value by interpreting the contents of the ASCII string specified by String. The format of the input ASCII string String consists of 36 characters, as follows:
aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
The pairs aa - pp are two characters in the range [0-9], [a-f] and [A-F], with each pair representing a single byte hexadecimal value.
The mapping between String and the EFI_GUID structure is as follows: aa Data1[24:31] bb Data1[16:23] cc Data1[8:15] dd Data1[0:7] ee Data2[8:15] ff Data2[0:7] gg Data3[8:15] hh Data3[0:7] ii Data4[0:7] jj Data4[8:15] kk Data4[16:23] ll Data4[24:31] mm Data4[32:39] nn Data4[40:47] oo Data4[48:55] pp Data4[56:63]
| String | Pointer to a Null-terminated ASCII string. |
| Guid | Pointer to the converted GUID. |
| RETURN_SUCCESS | Guid is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. |
| RETURN_UNSUPPORTED | If String is not as the above format. |
| RETURN_STATUS EFIAPI AsciiStrToIpv4Address | ( | IN CONST CHAR8 * | String, |
| OUT CHAR8 ** | EndPointer, | ||
| OUT IPv4_ADDRESS * | Address, | ||
| OUT UINT8 * | PrefixLength | ||
| ) |
Convert a Null-terminated ASCII string to IPv4 address and prefix length.
This function outputs a value of type IPv4_ADDRESS and may output a value of type UINT8 by interpreting the contents of the ASCII string specified by String. The format of the input ASCII string String is as follows:
D.D.D.D[/P]
D and P are decimal digit characters in the range [0-9]. The running zero in the beginning of D and P will be ignored. /P is optional.
When /P is not in the String, the function stops at the first character that is not a valid decimal digit character after four D's are converted.
When /P is in the String, the function stops at the first character that is not a valid decimal digit character after P is converted.
If EndPointer is not NULL and Address is translated from String, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated ASCII string. |
| EndPointer | Pointer to character that stops scan. |
| Address | Pointer to the converted IPv4 address. |
| PrefixLength | Pointer to the converted IPv4 address prefix length. MAX_UINT8 is returned when /P is not in the String. |
| RETURN_SUCCESS | Address is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. |
| RETURN_UNSUPPORTED | If String is not in the correct format. If any decimal number converted from D exceeds 255. If the decimal number converted from P exceeds 32. |
| RETURN_STATUS EFIAPI AsciiStrToIpv6Address | ( | IN CONST CHAR8 * | String, |
| OUT CHAR8 ** | EndPointer, | ||
| OUT IPv6_ADDRESS * | Address, | ||
| OUT UINT8 * | PrefixLength | ||
| ) |
Convert a Null-terminated ASCII string to IPv6 address and prefix length.
This function outputs a value of type IPv6_ADDRESS and may output a value of type UINT8 by interpreting the contents of the ASCII string specified by String. The format of the input ASCII string String is as follows:
X:X:X:X:X:X:X:X[/P]
X contains one to four hexadecimal digit characters in the range [0-9], [a-f] and [A-F]. X is converted to a value of type UINT16, whose low byte is stored in low memory address and high byte is stored in high memory address. P contains decimal digit characters in the range [0-9]. The running zero in the beginning of P will be ignored. /P is optional.
When /P is not in the String, the function stops at the first character that is not a valid hexadecimal digit character after eight X's are converted.
When /P is in the String, the function stops at the first character that is not a valid decimal digit character after P is converted.
"::" can be used to compress one or more groups of X when X contains only 0. The "::" can only appear once in the String.
If EndPointer is not NULL and Address is translated from String, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated ASCII string. |
| EndPointer | Pointer to character that stops scan. |
| Address | Pointer to the converted IPv6 address. |
| PrefixLength | Pointer to the converted IPv6 address prefix length. MAX_UINT8 is returned when /P is not in the String. |
| RETURN_SUCCESS | Address is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. |
| RETURN_UNSUPPORTED | If X contains more than four hexadecimal digit characters. If String contains "::" and number of X is not less than 8. If P starts with character that is not a valid decimal digit character. If the decimal number converted from P exceeds 128. |
| RETURN_STATUS EFIAPI AsciiStrToUnicodeStrS | ( | IN CONST CHAR8 * | Source, |
| OUT CHAR16 * | Destination, | ||
| IN UINTN | DestMax | ||
| ) |
Convert one Null-terminated ASCII string to a Null-terminated Unicode string.
This function is similar to StrCpyS.
This function converts the contents of the ASCII string Source to the Unicode string Destination. The function terminates the Unicode string Destination by appending a Null-terminator character at the end.
The caller is responsible to make sure Destination points to a buffer with size equal or greater than ((AsciiStrLen (Source) + 1) * sizeof (CHAR16)) in bytes.
If Destination is not aligned on a 16-bit boundary, then ASSERT().
If an error is returned, then the Destination is unmodified.
| Source | The pointer to a Null-terminated ASCII string. |
| Destination | The pointer to a Null-terminated Unicode string. |
| DestMax | The maximum number of Destination Unicode char, including terminating null char. |
| RETURN_SUCCESS | String is converted. |
| RETURN_BUFFER_TOO_SMALL | If DestMax is NOT greater than StrLen(Source). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumUnicodeStringLength is not zero, and DestMax is greater than PcdMaximumUnicodeStringLength. If PcdMaximumAsciiStringLength is not zero, and DestMax is greater than PcdMaximumAsciiStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
| UINT32 EFIAPI AsmCpuid | ( | IN UINT32 | Index, |
| OUT UINT32 * | Eax, | ||
| OUT UINT32 * | Ebx, | ||
| OUT UINT32 * | Ecx, | ||
| OUT UINT32 * | Edx | ||
| ) |
Retrieves CPUID information.
Executes the CPUID instruction with EAX set to the value specified by Index. This function always returns Index. If Eax is not NULL, then the value of EAX after CPUID is returned in Eax. If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx. If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx. If Edx is not NULL, then the value of EDX after CPUID is returned in Edx. This function is only available on IA-32 and x64.
| Index | The 32-bit value to load into EAX prior to invoking the CPUID instruction. |
| Eax | The pointer to the 32-bit EAX value returned by the CPUID instruction. This is an optional parameter that may be NULL. |
| Ebx | The pointer to the 32-bit EBX value returned by the CPUID instruction. This is an optional parameter that may be NULL. |
| Ecx | The pointer to the 32-bit ECX value returned by the CPUID instruction. This is an optional parameter that may be NULL. |
| Edx | The pointer to the 32-bit EDX value returned by the CPUID instruction. This is an optional parameter that may be NULL. |
| UINT32 EFIAPI AsmCpuidEx | ( | IN UINT32 | Index, |
| IN UINT32 | SubIndex, | ||
| OUT UINT32 * | Eax, | ||
| OUT UINT32 * | Ebx, | ||
| OUT UINT32 * | Ecx, | ||
| OUT UINT32 * | Edx | ||
| ) |
Retrieves CPUID information using an extended leaf identifier.
Executes the CPUID instruction with EAX set to the value specified by Index and ECX set to the value specified by SubIndex. This function always returns Index. This function is only available on IA-32 and x64.
If Eax is not NULL, then the value of EAX after CPUID is returned in Eax. If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx. If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx. If Edx is not NULL, then the value of EDX after CPUID is returned in Edx.
| Index | The 32-bit value to load into EAX prior to invoking the CPUID instruction. |
| SubIndex | The 32-bit value to load into ECX prior to invoking the CPUID instruction. |
| Eax | The pointer to the 32-bit EAX value returned by the CPUID instruction. This is an optional parameter that may be NULL. |
| Ebx | The pointer to the 32-bit EBX value returned by the CPUID instruction. This is an optional parameter that may be NULL. |
| Ecx | The pointer to the 32-bit ECX value returned by the CPUID instruction. This is an optional parameter that may be NULL. |
| Edx | The pointer to the 32-bit EDX value returned by the CPUID instruction. This is an optional parameter that may be NULL. |
Set CD bit and clear NW bit of CR0 followed by a WBINVD.
Disables the caches by setting the CD bit of CR0 to 1, clearing the NW bit of CR0 to 0, and executing a WBINVD instruction. This function is only available on IA-32 and x64.
| VOID EFIAPI AsmDisablePaging32 | ( | IN SWITCH_STACK_ENTRY_POINT | EntryPoint, |
| IN VOID * | Context1, | ||
| IN VOID * | Context2, | ||
| IN VOID * | NewStack | ||
| ) |
Disables the 32-bit paging mode on the CPU.
Disables the 32-bit paging mode on the CPU and returns to 32-bit protected mode. This function assumes the current execution mode is 32-paged protected mode. This function is only available on IA-32. After the 32-bit paging mode is disabled, control is transferred to the function specified by EntryPoint using the new stack specified by NewStack and passing in the parameters specified by Context1 and Context2. Context1 and Context2 are optional and may be NULL. The function EntryPoint must never return.
If the current execution mode is not 32-bit paged mode, then ASSERT(). If EntryPoint is NULL, then ASSERT(). If NewStack is NULL, then ASSERT().
There are a number of constraints that must be followed before calling this function: 1) Interrupts must be disabled. 2) The caller must be in 32-bit paged mode. 3) CR0, CR3, and CR4 must be compatible with 32-bit paged mode. 4) CR3 must point to valid page tables that guarantee that the pages for this function and the stack are identity mapped.
| EntryPoint | A pointer to function to call with the new stack after paging is disabled. |
| Context1 | A pointer to the context to pass into the EntryPoint function as the first parameter after paging is disabled. |
| Context2 | A pointer to the context to pass into the EntryPoint function as the second parameter after paging is disabled. |
| NewStack | A pointer to the new stack to use for the EntryPoint function after paging is disabled. |
| VOID EFIAPI AsmDisablePaging64 | ( | IN UINT16 | Cs, |
| IN UINT32 | EntryPoint, | ||
| IN UINT32 | Context1, | ||
| IN UINT32 | Context2, | ||
| IN UINT32 | NewStack | ||
| ) |
Disables the 64-bit paging mode on the CPU.
Disables the 64-bit paging mode on the CPU and returns to 32-bit protected mode. This function assumes the current execution mode is 64-paging mode. This function is only available on x64. After the 64-bit paging mode is disabled, control is transferred to the function specified by EntryPoint using the new stack specified by NewStack and passing in the parameters specified by Context1 and Context2. Context1 and Context2 are optional and may be 0. The function EntryPoint must never return.
If the current execution mode is not 64-bit paged mode, then ASSERT(). If EntryPoint is 0, then ASSERT(). If NewStack is 0, then ASSERT().
| Cs | The 16-bit selector to load in the CS before EntryPoint is called. The descriptor in the GDT that this selector references must be setup for 32-bit protected mode. |
| EntryPoint | The 64-bit virtual address of the function to call with the new stack after paging is disabled. |
| Context1 | The 64-bit virtual address of the context to pass into the EntryPoint function as the first parameter after paging is disabled. |
| Context2 | The 64-bit virtual address of the context to pass into the EntryPoint function as the second parameter after paging is disabled. |
| NewStack | The 64-bit virtual address of the new stack to use for the EntryPoint function after paging is disabled. |
Perform a WBINVD and clear both the CD and NW bits of CR0.
Enables the caches by executing a WBINVD instruction and then clear both the CD and NW bits of CR0 to 0. This function is only available on IA-32 and x64.
| VOID EFIAPI AsmEnablePaging32 | ( | IN SWITCH_STACK_ENTRY_POINT | EntryPoint, |
| IN VOID * | Context1, | ||
| IN VOID * | Context2, | ||
| IN VOID * | NewStack | ||
| ) |
Enables the 32-bit paging mode on the CPU.
Enables the 32-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables must be properly initialized prior to calling this service. This function assumes the current execution mode is 32-bit protected mode. This function is only available on IA-32. After the 32-bit paging mode is enabled, control is transferred to the function specified by EntryPoint using the new stack specified by NewStack and passing in the parameters specified by Context1 and Context2. Context1 and Context2 are optional and may be NULL. The function EntryPoint must never return.
If the current execution mode is not 32-bit protected mode, then ASSERT(). If EntryPoint is NULL, then ASSERT(). If NewStack is NULL, then ASSERT().
There are a number of constraints that must be followed before calling this function: 1) Interrupts must be disabled. 2) The caller must be in 32-bit protected mode with flat descriptors. This means all descriptors must have a base of 0 and a limit of 4GB. 3) CR0 and CR4 must be compatible with 32-bit protected mode with flat descriptors. 4) CR3 must point to valid page tables that will be used once the transition is complete, and those page tables must guarantee that the pages for this function and the stack are identity mapped.
| EntryPoint | A pointer to function to call with the new stack after paging is enabled. |
| Context1 | A pointer to the context to pass into the EntryPoint function as the first parameter after paging is enabled. |
| Context2 | A pointer to the context to pass into the EntryPoint function as the second parameter after paging is enabled. |
| NewStack | A pointer to the new stack to use for the EntryPoint function after paging is enabled. |
| VOID EFIAPI AsmEnablePaging64 | ( | IN UINT16 | Cs, |
| IN UINT64 | EntryPoint, | ||
| IN UINT64 | Context1, | ||
| IN UINT64 | Context2, | ||
| IN UINT64 | NewStack | ||
| ) |
Enables the 64-bit paging mode on the CPU.
Enables the 64-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables must be properly initialized prior to calling this service. This function assumes the current execution mode is 32-bit protected mode with flat descriptors. This function is only available on IA-32. After the 64-bit paging mode is enabled, control is transferred to the function specified by EntryPoint using the new stack specified by NewStack and passing in the parameters specified by Context1 and Context2. Context1 and Context2 are optional and may be 0. The function EntryPoint must never return.
If the current execution mode is not 32-bit protected mode with flat descriptors, then ASSERT(). If EntryPoint is 0, then ASSERT(). If NewStack is 0, then ASSERT().
| Cs | The 16-bit selector to load in the CS before EntryPoint is called. The descriptor in the GDT that this selector references must be setup for long mode. |
| EntryPoint | The 64-bit virtual address of the function to call with the new stack after paging is enabled. |
| Context1 | The 64-bit virtual address of the context to pass into the EntryPoint function as the first parameter after paging is enabled. |
| Context2 | The 64-bit virtual address of the context to pass into the EntryPoint function as the second parameter after paging is enabled. |
| NewStack | The 64-bit virtual address of the new stack to use for the EntryPoint function after paging is enabled. |
Flushes a cache line from all the instruction and data caches within the coherency domain of the CPU.
Flushed the cache line specified by LinearAddress, and returns LinearAddress. This function is only available on IA-32 and x64.
| LinearAddress | The address of the cache line to flush. If the CPU is in a physical addressing mode, then LinearAddress is a physical address. If the CPU is in a virtual addressing mode, then LinearAddress is a virtual address. |
| VOID EFIAPI AsmFxRestore | ( | IN CONST IA32_FX_BUFFER * | Buffer | ) |
Restores the current floating point/SSE/SSE2 context from a buffer.
Restores the current floating point/SSE/SSE2 state from the buffer specified by Buffer. Buffer must be aligned on a 16-byte boundary. This function is only available on IA-32 and x64.
If Buffer is NULL, then ASSERT(). If Buffer is not aligned on a 16-byte boundary, then ASSERT(). If Buffer was not saved with AsmFxSave(), then ASSERT().
| Buffer | The pointer to a buffer to save the floating point/SSE/SSE2 context. |
| VOID EFIAPI AsmFxSave | ( | OUT IA32_FX_BUFFER * | Buffer | ) |
Save the current floating point/SSE/SSE2 context to a buffer.
Saves the current floating point/SSE/SSE2 state to the buffer specified by Buffer. Buffer must be aligned on a 16-byte boundary. This function is only available on IA-32 and x64.
If Buffer is NULL, then ASSERT(). If Buffer is not aligned on a 16-byte boundary, then ASSERT().
| Buffer | The pointer to a buffer to save the floating point/SSE/SSE2 context. |
| VOID EFIAPI AsmGetThunk16Properties | ( | OUT UINT32 * | RealModeBufferSize, |
| OUT UINT32 * | ExtraStackSize | ||
| ) |
Retrieves the properties for 16-bit thunk functions.
Computes the size of the buffer and stack below 1MB required to use the AsmPrepareThunk16(), AsmThunk16() and AsmPrepareAndThunk16() functions. This buffer size is returned in RealModeBufferSize, and the stack size is returned in ExtraStackSize. If parameters are passed to the 16-bit real mode code, then the actual minimum stack size is ExtraStackSize plus the maximum number of bytes that need to be passed to the 16-bit real mode code.
If RealModeBufferSize is NULL, then ASSERT(). If ExtraStackSize is NULL, then ASSERT().
| RealModeBufferSize | A pointer to the size of the buffer below 1MB required to use the 16-bit thunk functions. |
| ExtraStackSize | A pointer to the extra size of stack below 1MB that the 16-bit thunk functions require for temporary storage in the transition to and from 16-bit real mode. |
Executes a INVD instruction.
Executes a INVD instruction. This function is only available on IA-32 and x64.
Performs a serializing operation on all load-from-memory instructions that were issued prior the AsmLfence function.
Executes a LFENCE instruction. This function is only available on IA-32 and x64.
Sets up a monitor buffer that is used by AsmMwait().
Executes a MONITOR instruction with the register state specified by Eax, Ecx and Edx. Returns Eax. This function is only available on IA-32 and x64.
| Eax | The value to load into EAX or RAX before executing the MONITOR instruction. |
| Ecx | The value to load into ECX or RCX before executing the MONITOR instruction. |
| Edx | The value to load into EDX or RDX before executing the MONITOR instruction. |
Reads a 64-bit MSR, performs a bitwise AND on the lower 32-bits, and writes the result back to the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise AND between the lower 32-bits of the read result and the value specified by AndData, and writes the result to the 64-bit MSR specified by Index. The lower 32-bits of the value written to the MSR is returned. No parameter checking is performed on Index or AndData, and some of these may cause CPU exceptions. The caller must either guarantee that Index and AndData are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to write. |
| AndData | The value to AND with the read value from the MSR. |
Reads a 64-bit MSR, performs a bitwise AND, and writes the result back to the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise AND between the read result and the value specified by OrData, and writes the result to the 64-bit MSR specified by Index. The value written to the MSR is returned. No parameter checking is performed on Index or OrData, and some of these may cause CPU exceptions. The caller must either guarantee that Index and OrData are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to write. |
| AndData | The value to AND with the read value from the MSR. |
Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise OR on the lower 32-bits, and writes the result back to the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise AND between the lower 32-bits of the read result and the value specified by AndData preserving the upper 32-bits, performs a bitwise OR between the result of the AND operation and the value specified by OrData, and writes the result to the 64-bit MSR specified by Address. The lower 32-bits of the value written to the MSR is returned. No parameter checking is performed on Index, AndData, or OrData, and some of these may cause CPU exceptions. The caller must either guarantee that Index, AndData, and OrData are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to write. |
| AndData | The value to AND with the read value from the MSR. |
| OrData | The value to OR with the result of the AND operation. |
Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise OR, and writes the result back to the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise AND between read result and the value specified by AndData, performs a bitwise OR between the result of the AND operation and the value specified by OrData, and writes the result to the 64-bit MSR specified by Index. The value written to the MSR is returned. No parameter checking is performed on Index, AndData, or OrData, and some of these may cause CPU exceptions. The caller must either guarantee that Index, AndData, and OrData are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to write. |
| AndData | The value to AND with the read value from the MSR. |
| OrData | The value to OR with the result of the AND operation. |
| UINT32 EFIAPI AsmMsrBitFieldAnd32 | ( | IN UINT32 | Index, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT32 | AndData | ||
| ) |
Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the result back to the bit field in the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise AND between the read result and the value specified by AndData, and writes the result to the 64-bit MSR specified by Index. The lower 32-bits of the value written to the MSR are returned. Extra left bits in AndData are stripped. The caller must either guarantee that Index and the data written is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Index | The 32-bit MSR index to write. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
| AndData | The value to AND with the read value from the MSR. |
| UINT64 EFIAPI AsmMsrBitFieldAnd64 | ( | IN UINT32 | Index, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT64 | AndData | ||
| ) |
Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the result back to the bit field in the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise AND between the read result and the value specified by AndData, and writes the result to the 64-bit MSR specified by Index. The value written to the MSR is returned. Extra left bits in AndData are stripped. The caller must either guarantee that Index and the data written is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Index | The 32-bit MSR index to write. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| AndData | The value to AND with the read value from the bit field. |
| UINT32 EFIAPI AsmMsrBitFieldAndThenOr32 | ( | IN UINT32 | Index, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT32 | AndData, | ||
| IN UINT32 | OrData | ||
| ) |
Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a bitwise OR, and writes the result back to the bit field in the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by a bitwise OR between the read result and the value specified by AndData, and writes the result to the 64-bit MSR specified by Index. The lower 32-bits of the value written to the MSR are returned. Extra left bits in both AndData and OrData are stripped. The caller must either guarantee that Index and the data written is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Index | The 32-bit MSR index to write. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
| AndData | The value to AND with the read value from the MSR. |
| OrData | The value to OR with the result of the AND operation. |
| UINT64 EFIAPI AsmMsrBitFieldAndThenOr64 | ( | IN UINT32 | Index, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT64 | AndData, | ||
| IN UINT64 | OrData | ||
| ) |
Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a bitwise OR, and writes the result back to the bit field in the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by a bitwise OR between the read result and the value specified by AndData, and writes the result to the 64-bit MSR specified by Index. The value written to the MSR is returned. Extra left bits in both AndData and OrData are stripped. The caller must either guarantee that Index and the data written is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Index | The 32-bit MSR index to write. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| AndData | The value to AND with the read value from the bit field. |
| OrData | The value to OR with the result of the AND operation. |
| UINT32 EFIAPI AsmMsrBitFieldOr32 | ( | IN UINT32 | Index, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT32 | OrData | ||
| ) |
Reads a bit field in a 64-bit MSR, performs a bitwise OR, and writes the result back to the bit field in the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise OR between the read result and the value specified by OrData, and writes the result to the 64-bit MSR specified by Index. The lower 32-bits of the value written to the MSR are returned. Extra left bits in OrData are stripped. The caller must either guarantee that Index and the data written is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Index | The 32-bit MSR index to write. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
| OrData | The value to OR with the read value from the MSR. |
| UINT64 EFIAPI AsmMsrBitFieldOr64 | ( | IN UINT32 | Index, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT64 | OrData | ||
| ) |
Reads a bit field in a 64-bit MSR, performs a bitwise OR, and writes the result back to the bit field in the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise OR between the read result and the value specified by OrData, and writes the result to the 64-bit MSR specified by Index. The value written to the MSR is returned. Extra left bits in OrData are stripped. The caller must either guarantee that Index and the data written is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Index | The 32-bit MSR index to write. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| OrData | The value to OR with the read value from the bit field. |
Reads a bit field of an MSR.
Reads the bit field in the lower 32-bits of a 64-bit MSR. The bit field is specified by the StartBit and the EndBit. The value of the bit field is returned. The caller must either guarantee that Index is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT().
| Index | The 32-bit MSR index to read. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
Reads a bit field of an MSR.
Reads the bit field in the 64-bit MSR. The bit field is specified by the StartBit and the EndBit. The value of the bit field is returned. The caller must either guarantee that Index is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT().
| Index | The 32-bit MSR index to read. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| UINT32 EFIAPI AsmMsrBitFieldWrite32 | ( | IN UINT32 | Index, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT32 | Value | ||
| ) |
Writes a bit field to an MSR.
Writes Value to a bit field in the lower 32-bits of a 64-bit MSR. The bit field is specified by the StartBit and the EndBit. All other bits in the destination MSR are preserved. The lower 32-bits of the MSR written is returned. The caller must either guarantee that Index and the data written is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Index | The 32-bit MSR index to write. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
| Value | New value of the bit field. |
| UINT64 EFIAPI AsmMsrBitFieldWrite64 | ( | IN UINT32 | Index, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT64 | Value | ||
| ) |
Writes a bit field to an MSR.
Writes Value to a bit field in a 64-bit MSR. The bit field is specified by the StartBit and the EndBit. All other bits in the destination MSR are preserved. The MSR written is returned. The caller must either guarantee that Index and the data written is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Index | The 32-bit MSR index to write. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| Value | New value of the bit field. |
Reads a 64-bit MSR, performs a bitwise OR on the lower 32-bits, and writes the result back to the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise OR between the lower 32-bits of the read result and the value specified by OrData, and writes the result to the 64-bit MSR specified by Index. The lower 32-bits of the value written to the MSR is returned. No parameter checking is performed on Index or OrData, and some of these may cause CPU exceptions. The caller must either guarantee that Index and OrData are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to write. |
| OrData | The value to OR with the read value from the MSR. |
Reads a 64-bit MSR, performs a bitwise OR, and writes the result back to the 64-bit MSR.
Reads the 64-bit MSR specified by Index, performs a bitwise OR between the read result and the value specified by OrData, and writes the result to the 64-bit MSR specified by Index. The value written to the MSR is returned. No parameter checking is performed on Index or OrData, and some of these may cause CPU exceptions. The caller must either guarantee that Index and OrData are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to write. |
| OrData | The value to OR with the read value from the MSR. |
Executes an MWAIT instruction.
Executes an MWAIT instruction with the register state specified by Eax and Ecx. Returns Eax. This function is only available on IA-32 and x64.
| Eax | The value to load into EAX or RAX before executing the MONITOR instruction. |
| Ecx | The value to load into ECX or RCX before executing the MONITOR instruction. |
| VOID EFIAPI AsmPrepareAndThunk16 | ( | IN OUT THUNK_CONTEXT * | ThunkContext | ) |
Prepares all structures and code for a 16-bit real mode thunk, transfers control to a 16-bit real mode entry point, and returns the results.
Prepares all structures and code for a 16-bit real mode thunk, transfers control to a 16-bit real mode entry point, and returns the results. If the caller only need to perform a single 16-bit real mode thunk, then this service should be used. If the caller intends to make more than one 16-bit real mode thunk, then it is more efficient if AsmPrepareThunk16() is called once and AsmThunk16() can be called for each 16-bit real mode thunk.
This interface is limited to be used in either physical mode or virtual modes with paging enabled where the virtual to physical mappings for ThunkContext.RealModeBuffer is mapped 1:1.
See AsmPrepareThunk16() and AsmThunk16() for the detailed description and ASSERT() conditions.
| ThunkContext | A pointer to the context structure that describes the 16-bit real mode code to call. |
| VOID EFIAPI AsmPrepareThunk16 | ( | IN OUT THUNK_CONTEXT * | ThunkContext | ) |
Prepares all structures a code required to use AsmThunk16().
Prepares all structures and code required to use AsmThunk16().
This interface is limited to be used in either physical mode or virtual modes with paging enabled where the virtual to physical mappings for ThunkContext.RealModeBuffer is mapped 1:1.
If ThunkContext is NULL, then ASSERT().
| ThunkContext | A pointer to the context structure that describes the 16-bit real mode code to call. |
| UINT32 EFIAPI AsmPvalidate | ( | IN PVALIDATE_PAGE_SIZE | PageSize, |
| IN BOOLEAN | Validate, | ||
| IN PHYSICAL_ADDRESS | Address | ||
| ) |
Execute a PVALIDATE instruction to validate or to rescinds validation of a guest page's RMP entry.
The instruction is available only when CPUID Fn8000_001F_EAX[SNP]=1.
The function is available on X64.
| [in] | PageSize | The page size to use. |
| [in] | Validate | If TRUE, validate the guest virtual address otherwise invalidate the guest virtual address. |
| [in] | Address | The guest virtual address. |
| PVALIDATE_RET_SUCCESS | The PVALIDATE instruction succeeded, and updated the RMP entry. |
| PVALIDATE_RET_NO_RMPUPDATE | The PVALIDATE instruction succeeded, but did not update the RMP entry. |
Generates a 16-bit random number through RDRAND instruction.
if Rand is NULL, then ASSERT().
| [out] | Rand | Buffer pointer to store the random result. |
| TRUE | RDRAND call was successful. |
| FALSE | Failed attempts to call RDRAND. |
Generates a 32-bit random number through RDRAND instruction.
if Rand is NULL, then ASSERT().
| [out] | Rand | Buffer pointer to store the random result. |
| TRUE | RDRAND call was successful. |
| FALSE | Failed attempts to call RDRAND. |
Generates a 64-bit random number through RDRAND instruction.
if Rand is NULL, then ASSERT().
| [out] | Rand | Buffer pointer to store the random result. |
| TRUE | RDRAND call was successful. |
| FALSE | Failed attempts to call RDRAND. |
Reads the current value of the Control Register 0 (CR0).
Reads and returns the current value of CR0. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of the Control Register 2 (CR2).
Reads and returns the current value of CR2. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of the Control Register 3 (CR3).
Reads and returns the current value of CR3. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of the Control Register 4 (CR4).
Reads and returns the current value of CR4. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Code Segment Register (CS).
Reads and returns the current value of CS. This function is only available on IA-32 and x64.
Reads the current value of Debug Register 0 (DR0).
Reads and returns the current value of DR0. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Debug Register 1 (DR1).
Reads and returns the current value of DR1. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Debug Register 2 (DR2).
Reads and returns the current value of DR2. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Debug Register 3 (DR3).
Reads and returns the current value of DR3. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Debug Register 4 (DR4).
Reads and returns the current value of DR4. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Debug Register 5 (DR5).
Reads and returns the current value of DR5. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Debug Register 6 (DR6).
Reads and returns the current value of DR6. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Debug Register 7 (DR7).
Reads and returns the current value of DR7. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Data Segment Register (DS).
Reads and returns the current value of DS. This function is only available on IA-32 and x64.
Reads the current value of the EFLAGS register.
Reads and returns the current value of the EFLAGS register. This function is only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on x64.
Reads the current value of Extra Segment Register (ES).
Reads and returns the current value of ES. This function is only available on IA-32 and x64.
Reads the current value of FS Data Segment Register (FS).
Reads and returns the current value of FS. This function is only available on IA-32 and x64.
| VOID EFIAPI AsmReadGdtr | ( | OUT IA32_DESCRIPTOR * | Gdtr | ) |
Reads the current Global Descriptor Table Register(GDTR) descriptor.
Reads and returns the current GDTR descriptor and returns it in Gdtr. This function is only available on IA-32 and x64.
If Gdtr is NULL, then ASSERT().
| Gdtr | The pointer to a GDTR descriptor. |
Reads the current value of GS Data Segment Register (GS).
Reads and returns the current value of GS. This function is only available on IA-32 and x64.
| VOID EFIAPI AsmReadIdtr | ( | OUT IA32_DESCRIPTOR * | Idtr | ) |
Reads the current Interrupt Descriptor Table Register(IDTR) descriptor.
Reads and returns the current IDTR descriptor and returns it in Idtr. This function is only available on IA-32 and x64.
If Idtr is NULL, then ASSERT().
| Idtr | The pointer to a IDTR descriptor. |
Reads the current Local Descriptor Table Register(LDTR) selector.
Reads and returns the current 16-bit LDTR descriptor value. This function is only available on IA-32 and x64.
Reads the current value of 64-bit MMX Register #0 (MM0).
Reads and returns the current value of MM0. This function is only available on IA-32 and x64.
Reads the current value of 64-bit MMX Register #1 (MM1).
Reads and returns the current value of MM1. This function is only available on IA-32 and x64.
Reads the current value of 64-bit MMX Register #2 (MM2).
Reads and returns the current value of MM2. This function is only available on IA-32 and x64.
Reads the current value of 64-bit MMX Register #3 (MM3).
Reads and returns the current value of MM3. This function is only available on IA-32 and x64.
Reads the current value of 64-bit MMX Register #4 (MM4).
Reads and returns the current value of MM4. This function is only available on IA-32 and x64.
Reads the current value of 64-bit MMX Register #5 (MM5).
Reads and returns the current value of MM5. This function is only available on IA-32 and x64.
Reads the current value of 64-bit MMX Register #6 (MM6).
Reads and returns the current value of MM6. This function is only available on IA-32 and x64.
Reads the current value of 64-bit MMX Register #7 (MM7).
Reads and returns the current value of MM7. This function is only available on IA-32 and x64.
Returns the lower 32-bits of a Machine Specific Register(MSR).
Reads and returns the lower 32-bits of the MSR specified by Index. No parameter checking is performed on Index, and some Index values may cause CPU exceptions. The caller must either guarantee that Index is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to read. |
Returns a 64-bit Machine Specific Register(MSR).
Reads and returns the 64-bit MSR specified by Index. No parameter checking is performed on Index, and some Index values may cause CPU exceptions. The caller must either guarantee that Index is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to read. |
Reads the current value of a Performance Counter (PMC).
Reads and returns the current value of performance counter specified by Index. This function is only available on IA-32 and x64.
| Index | The 32-bit Performance Counter index to read. |
Reads the current value of Stack Segment Register (SS).
Reads and returns the current value of SS. This function is only available on IA-32 and x64.
Reads the current value of Task Register (TR).
Reads and returns the current value of TR. This function is only available on IA-32 and x64.
Reads the current value of Time Stamp Counter (TSC).
Reads and returns the current value of TSC. This function is only available on IA-32 and x64.
Adjusts the permissions of an SEV-SNP guest page.
Executes a RMPADJUST instruction with the register state specified by Rax, Rcx, and Rdx. Returns Eax. This function is only available on X64.
The instruction is available only when CPUID Fn8000_001F_EAX[SNP]=1.
| [in] | Rax | The value to load into RAX before executing the RMPADJUST instruction. |
| [in] | Rcx | The value to load into RCX before executing the RMPADJUST instruction. |
| [in] | Rdx | The value to load into RDX before executing the RMPADJUST instruction. |
| VOID EFIAPI AsmThunk16 | ( | IN OUT THUNK_CONTEXT * | ThunkContext | ) |
Transfers control to a 16-bit real mode entry point and returns the results.
Transfers control to a 16-bit real mode entry point and returns the results. AsmPrepareThunk16() must be called with ThunkContext before this function is used. This function must be called with interrupts disabled.
The register state from the RealModeState field of ThunkContext is restored just prior to calling the 16-bit real mode entry point. This includes the EFLAGS field of RealModeState, which is used to set the interrupt state when a 16-bit real mode entry point is called. Control is transferred to the 16-bit real mode entry point specified by the CS and Eip fields of RealModeState. The stack is initialized to the SS and ESP fields of RealModeState. Any parameters passed to the 16-bit real mode code must be populated by the caller at SS:ESP prior to calling this function. The 16-bit real mode entry point is invoked with a 16-bit CALL FAR instruction, so when accessing stack contents, the 16-bit real mode code must account for the 16-bit segment and 16-bit offset of the return address that were pushed onto the stack. The 16-bit real mode entry point must exit with a RETF instruction. The register state is captured into RealModeState immediately after the RETF instruction is executed.
If EFLAGS specifies interrupts enabled, or any of the 16-bit real mode code enables interrupts, or any of the 16-bit real mode code makes a SW interrupt, then the caller is responsible for making sure the IDT at address 0 is initialized to handle any HW or SW interrupts that may occur while in 16-bit real mode.
If EFLAGS specifies interrupts enabled, or any of the 16-bit real mode code enables interrupts, then the caller is responsible for making sure the 8259 PIC is in a state compatible with 16-bit real mode. This includes the base vectors, the interrupt masks, and the edge/level trigger mode.
If THUNK_ATTRIBUTE_BIG_REAL_MODE is set in the ThunkAttributes field of ThunkContext, then the user code is invoked in big real mode. Otherwise, the user code is invoked in 16-bit real mode with 64KB segment limits.
If neither THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 nor THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL are set in ThunkAttributes, then it is assumed that the user code did not enable the A20 mask, and no attempt is made to disable the A20 mask.
If THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 is set and THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL is clear in ThunkAttributes, then attempt to use the INT 15 service to disable the A20 mask. If this INT 15 call fails, then attempt to disable the A20 mask by directly accessing the 8042 keyboard controller I/O ports.
If THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 is clear and THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL is set in ThunkAttributes, then attempt to disable the A20 mask by directly accessing the 8042 keyboard controller I/O ports.
If ThunkContext is NULL, then ASSERT(). If AsmPrepareThunk16() was not previously called with ThunkContext, then ASSERT(). If both THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 and THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL are set in ThunkAttributes, then ASSERT().
This interface is limited to be used in either physical mode or virtual modes with paging enabled where the virtual to physical mappings for ThunkContext.RealModeBuffer are mapped 1:1.
| ThunkContext | A pointer to the context structure that describes the 16-bit real mode code to call. |
Executes a VMGEXIT instruction (VMMCALL with a REP prefix)
Executes a VMGEXIT instruction. This function is only available on IA-32 and x64.
Executes a WBINVD instruction.
Executes a WBINVD instruction. This function is only available on IA-32 and x64.
Writes a value to Control Register 0 (CR0).
Writes and returns a new value to CR0. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Cr0 | The value to write to CR0. |
Writes a value to Control Register 2 (CR2).
Writes and returns a new value to CR2. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Cr2 | The value to write to CR2. |
Writes a value to Control Register 3 (CR3).
Writes and returns a new value to CR3. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Cr3 | The value to write to CR3. |
Writes a value to Control Register 4 (CR4).
Writes and returns a new value to CR4. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Cr4 | The value to write to CR4. |
Writes a value to Debug Register 0 (DR0).
Writes and returns a new value to DR0. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Dr0 | The value to write to Dr0. |
Writes a value to Debug Register 1 (DR1).
Writes and returns a new value to DR1. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Dr1 | The value to write to Dr1. |
Writes a value to Debug Register 2 (DR2).
Writes and returns a new value to DR2. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Dr2 | The value to write to Dr2. |
Writes a value to Debug Register 3 (DR3).
Writes and returns a new value to DR3. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Dr3 | The value to write to Dr3. |
Writes a value to Debug Register 4 (DR4).
Writes and returns a new value to DR4. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Dr4 | The value to write to Dr4. |
Writes a value to Debug Register 5 (DR5).
Writes and returns a new value to DR5. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Dr5 | The value to write to Dr5. |
Writes a value to Debug Register 6 (DR6).
Writes and returns a new value to DR6. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Dr6 | The value to write to Dr6. |
Writes a value to Debug Register 7 (DR7).
Writes and returns a new value to DR7. This function is only available on IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
| Dr7 | The value to write to Dr7. |
| VOID EFIAPI AsmWriteGdtr | ( | IN CONST IA32_DESCRIPTOR * | Gdtr | ) |
Writes the current Global Descriptor Table Register (GDTR) descriptor.
Writes and the current GDTR descriptor specified by Gdtr. This function is only available on IA-32 and x64.
If Gdtr is NULL, then ASSERT().
| Gdtr | The pointer to a GDTR descriptor. |
| VOID EFIAPI AsmWriteIdtr | ( | IN CONST IA32_DESCRIPTOR * | Idtr | ) |
Writes the current Interrupt Descriptor Table Register(IDTR) descriptor.
Writes the current IDTR descriptor and returns it in Idtr. This function is only available on IA-32 and x64.
If Idtr is NULL, then ASSERT().
| Idtr | The pointer to a IDTR descriptor. |
Writes the current Local Descriptor Table Register (LDTR) selector.
Writes and the current LDTR descriptor specified by Ldtr. This function is only available on IA-32 and x64.
| Ldtr | 16-bit LDTR selector value. |
Writes the current value of 64-bit MMX Register #0 (MM0).
Writes the current value of MM0. This function is only available on IA32 and x64.
| Value | The 64-bit value to write to MM0. |
Writes the current value of 64-bit MMX Register #1 (MM1).
Writes the current value of MM1. This function is only available on IA32 and x64.
| Value | The 64-bit value to write to MM1. |
Writes the current value of 64-bit MMX Register #2 (MM2).
Writes the current value of MM2. This function is only available on IA32 and x64.
| Value | The 64-bit value to write to MM2. |
Writes the current value of 64-bit MMX Register #3 (MM3).
Writes the current value of MM3. This function is only available on IA32 and x64.
| Value | The 64-bit value to write to MM3. |
Writes the current value of 64-bit MMX Register #4 (MM4).
Writes the current value of MM4. This function is only available on IA32 and x64.
| Value | The 64-bit value to write to MM4. |
Writes the current value of 64-bit MMX Register #5 (MM5).
Writes the current value of MM5. This function is only available on IA32 and x64.
| Value | The 64-bit value to write to MM5. |
Writes the current value of 64-bit MMX Register #6 (MM6).
Writes the current value of MM6. This function is only available on IA32 and x64.
| Value | The 64-bit value to write to MM6. |
Writes the current value of 64-bit MMX Register #7 (MM7).
Writes the current value of MM7. This function is only available on IA32 and x64.
| Value | The 64-bit value to write to MM7. |
Writes a 32-bit value to a Machine Specific Register(MSR), and returns the value. The upper 32-bits of the MSR are set to zero.
Writes the 32-bit value specified by Value to the MSR specified by Index. The upper 32-bits of the MSR write are set to zero. The 32-bit value written to the MSR is returned. No parameter checking is performed on Index or Value, and some of these may cause CPU exceptions. The caller must either guarantee that Index and Value are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to write. |
| Value | The 32-bit value to write to the MSR. |
Writes a 64-bit value to a Machine Specific Register(MSR), and returns the value.
Writes the 64-bit value specified by Value to the MSR specified by Index. The 64-bit value written to the MSR is returned. No parameter checking is performed on Index or Value, and some of these may cause CPU exceptions. The caller must either guarantee that Index and Value are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit MSR index to write. |
| Value | The 64-bit value to write to the MSR. |
Load given selector into TR register.
| [in] | Selector | Task segment selector |
Executes a XGETBV instruction
Executes a XGETBV instruction. This function is only available on IA-32 and x64.
| [in] | Index | Extended control register index |
Executes a XSETBV instruction to write a 64-bit value to a Extended Control Register(XCR), and returns the value.
Writes the 64-bit value specified by Value to the XCR specified by Index. The 64-bit value written to the XCR is returned. No parameter checking is performed on Index or Value, and some of these may cause CPU exceptions. The caller must either guarantee that Index and Value are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and x64.
| Index | The 32-bit XCR index to write. |
| Value | The 64-bit value to write to the XCR. |
| RETURN_STATUS EFIAPI Base64Decode | ( | IN CONST CHAR8 * | Source, |
| IN UINTN | SourceSize, | ||
| OUT UINT8 * | Destination, | ||
| IN OUT UINTN * | DestinationSize | ||
| ) |
Decode Base64 ASCII encoded data to 8-bit binary representation, based on RFC4648.
Decoding occurs according to "Table 1: The Base 64 Alphabet" in RFC4648.
Whitespace is ignored at all positions:
The minimum amount of required padding (with ASCII 0x3D, '=') is tolerated and enforced at the end of the Base64 ASCII encoded data, and only there.
Other characters outside of the encoding alphabet cause the function to reject the Base64 ASCII encoded data.
| [in] | Source | Array of CHAR8 elements containing the Base64 ASCII encoding. May be NULL if SourceSize is zero. |
| [in] | SourceSize | Number of CHAR8 elements in Source. |
| [out] | Destination | Array of UINT8 elements receiving the decoded 8-bit binary representation. Allocated by the caller. May be NULL if DestinationSize is zero on input. If NULL, decoding is performed, but the 8-bit binary representation is not stored. If non-NULL and the function returns an error, the contents of Destination are indeterminate. |
| [in,out] | DestinationSize | On input, the number of UINT8 elements that the caller allocated for Destination. On output, if the function returns RETURN_SUCCESS or RETURN_BUFFER_TOO_SMALL, the number of UINT8 elements that are required for decoding the Base64 ASCII representation. If the function returns a value different from both RETURN_SUCCESS and RETURN_BUFFER_TOO_SMALL, then DestinationSize is indeterminate on output. |
| RETURN_SUCCESS | SourceSize CHAR8 elements at Source have been decoded to on-output DestinationSize UINT8 elements at Destination. Note that RETURN_SUCCESS covers the case when DestinationSize is zero on input, and Source decodes to zero bytes (due to containing at most ignored whitespace). |
| RETURN_BUFFER_TOO_SMALL | The input value of DestinationSize is not large enough for decoding SourceSize CHAR8 elements at Source. The required number of UINT8 elements has been stored to DestinationSize. |
| RETURN_INVALID_PARAMETER | DestinationSize is NULL. |
| RETURN_INVALID_PARAMETER | Source is NULL, but SourceSize is not zero. |
| RETURN_INVALID_PARAMETER | Destination is NULL, but DestinationSize is not zero on input. |
| RETURN_INVALID_PARAMETER | Source is non-NULL, and (Source + SourceSize) would wrap around MAX_ADDRESS. |
| RETURN_INVALID_PARAMETER | Destination is non-NULL, and (Destination + DestinationSize) would wrap around MAX_ADDRESS, as specified on input. |
| RETURN_INVALID_PARAMETER | None of Source and Destination are NULL, and CHAR8[SourceSize] at Source overlaps UINT8[DestinationSize] at Destination, as specified on input. |
| RETURN_INVALID_PARAMETER | Invalid CHAR8 element encountered in Source. |
| RETURN_STATUS EFIAPI Base64Encode | ( | IN CONST UINT8 * | Source, |
| IN UINTN | SourceLength, | ||
| OUT CHAR8 * | Destination, | ||
| IN OUT UINTN * | DestinationSize | ||
| ) |
Convert binary data to a Base64 encoded ascii string based on RFC4648.
Produce a Null-terminated Ascii string in the output buffer specified by Destination and DestinationSize. The Ascii string is produced by converting the data string specified by Source and SourceLength.
| Source | Input UINT8 data |
| SourceLength | Number of UINT8 bytes of data |
| Destination | Pointer to output string buffer |
| DestinationSize | Size of ascii buffer. Set to 0 to get the size needed. Caller is responsible for passing in buffer of DestinationSize |
| RETURN_SUCCESS | When ascii buffer is filled in. |
| RETURN_INVALID_PARAMETER | If Source is NULL or DestinationSize is NULL. |
| RETURN_INVALID_PARAMETER | If SourceLength or DestinationSize is bigger than (MAX_ADDRESS - (UINTN)Destination). |
| RETURN_BUFFER_TOO_SMALL | If SourceLength is 0 and DestinationSize is <1. |
| RETURN_BUFFER_TOO_SMALL | If Destination is NULL or DestinationSize is smaller than required buffersize. |
Converts an 8-bit BCD value to an 8-bit value.
Converts the 8-bit BCD value specified by Value to an 8-bit value. The 8-bit value is returned.
If Value >= 0xA0, then ASSERT(). If (Value & 0x0F) >= 0x0A, then ASSERT().
| Value | The 8-bit BCD value to convert to an 8-bit value. |
| UINT16 EFIAPI BitFieldAnd16 | ( | IN UINT16 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT16 | AndData | ||
| ) |
Reads a bit field from a 16-bit value, performs a bitwise AND, and returns the result.
Performs a bitwise AND between the bit field specified by StartBit and EndBit in Operand and the value specified by AndData. All other bits in Operand are preserved. The new 16-bit value is returned.
If 16-bit operations are not supported, then ASSERT(). If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..15. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..15. |
| AndData | The value to AND with the read value from the value |
| UINT32 EFIAPI BitFieldAnd32 | ( | IN UINT32 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT32 | AndData | ||
| ) |
Reads a bit field from a 32-bit value, performs a bitwise AND, and returns the result.
Performs a bitwise AND between the bit field specified by StartBit and EndBit in Operand and the value specified by AndData. All other bits in Operand are preserved. The new 32-bit value is returned.
If 32-bit operations are not supported, then ASSERT(). If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
| AndData | The value to AND with the read value from the value |
| UINT64 EFIAPI BitFieldAnd64 | ( | IN UINT64 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT64 | AndData | ||
| ) |
Reads a bit field from a 64-bit value, performs a bitwise AND, and returns the result.
Performs a bitwise AND between the bit field specified by StartBit and EndBit in Operand and the value specified by AndData. All other bits in Operand are preserved. The new 64-bit value is returned.
If 64-bit operations are not supported, then ASSERT(). If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| AndData | The value to AND with the read value from the value |
| UINT8 EFIAPI BitFieldAnd8 | ( | IN UINT8 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT8 | AndData | ||
| ) |
Reads a bit field from an 8-bit value, performs a bitwise AND, and returns the result.
Performs a bitwise AND between the bit field specified by StartBit and EndBit in Operand and the value specified by AndData. All other bits in Operand are preserved. The new 8-bit value is returned.
If 8-bit operations are not supported, then ASSERT(). If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..7. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..7. |
| AndData | The value to AND with the read value from the value. |
| UINT16 EFIAPI BitFieldAndThenOr16 | ( | IN UINT16 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT16 | AndData, | ||
| IN UINT16 | OrData | ||
| ) |
Reads a bit field from a 16-bit value, performs a bitwise AND followed by a bitwise OR, and returns the result.
Performs a bitwise AND between the bit field specified by StartBit and EndBit in Operand and the value specified by AndData, followed by a bitwise OR with value specified by OrData. All other bits in Operand are preserved. The new 16-bit value is returned.
If 16-bit operations are not supported, then ASSERT(). If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..15. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..15. |
| AndData | The value to AND with the read value from the value. |
| OrData | The value to OR with the result of the AND operation. |
| UINT32 EFIAPI BitFieldAndThenOr32 | ( | IN UINT32 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT32 | AndData, | ||
| IN UINT32 | OrData | ||
| ) |
Reads a bit field from a 32-bit value, performs a bitwise AND followed by a bitwise OR, and returns the result.
Performs a bitwise AND between the bit field specified by StartBit and EndBit in Operand and the value specified by AndData, followed by a bitwise OR with value specified by OrData. All other bits in Operand are preserved. The new 32-bit value is returned.
If 32-bit operations are not supported, then ASSERT(). If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
| AndData | The value to AND with the read value from the value. |
| OrData | The value to OR with the result of the AND operation. |
| UINT64 EFIAPI BitFieldAndThenOr64 | ( | IN UINT64 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT64 | AndData, | ||
| IN UINT64 | OrData | ||
| ) |
Reads a bit field from a 64-bit value, performs a bitwise AND followed by a bitwise OR, and returns the result.
Performs a bitwise AND between the bit field specified by StartBit and EndBit in Operand and the value specified by AndData, followed by a bitwise OR with value specified by OrData. All other bits in Operand are preserved. The new 64-bit value is returned.
If 64-bit operations are not supported, then ASSERT(). If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| AndData | The value to AND with the read value from the value. |
| OrData | The value to OR with the result of the AND operation. |
| UINT8 EFIAPI BitFieldAndThenOr8 | ( | IN UINT8 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT8 | AndData, | ||
| IN UINT8 | OrData | ||
| ) |
Reads a bit field from an 8-bit value, performs a bitwise AND followed by a bitwise OR, and returns the result.
Performs a bitwise AND between the bit field specified by StartBit and EndBit in Operand and the value specified by AndData, followed by a bitwise OR with value specified by OrData. All other bits in Operand are preserved. The new 8-bit value is returned.
If 8-bit operations are not supported, then ASSERT(). If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..7. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..7. |
| AndData | The value to AND with the read value from the value. |
| OrData | The value to OR with the result of the AND operation. |
Reads a bit field from a 32-bit value, counts and returns the number of set bits.
Counts the number of set bits in the bit field specified by StartBit and EndBit in Operand. The count is returned.
If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
Reads a bit field from a 64-bit value, counts and returns the number of set bits.
Counts the number of set bits in the bit field specified by StartBit and EndBit in Operand. The count is returned.
If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| UINT16 EFIAPI BitFieldOr16 | ( | IN UINT16 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT16 | OrData | ||
| ) |
Reads a bit field from a 16-bit value, performs a bitwise OR, and returns the result.
Performs a bitwise OR between the bit field specified by StartBit and EndBit in Operand and the value specified by OrData. All other bits in Operand are preserved. The new 16-bit value is returned.
If 16-bit operations are not supported, then ASSERT(). If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..15. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..15. |
| OrData | The value to OR with the read value from the value |
| UINT32 EFIAPI BitFieldOr32 | ( | IN UINT32 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT32 | OrData | ||
| ) |
Reads a bit field from a 32-bit value, performs a bitwise OR, and returns the result.
Performs a bitwise OR between the bit field specified by StartBit and EndBit in Operand and the value specified by OrData. All other bits in Operand are preserved. The new 32-bit value is returned.
If 32-bit operations are not supported, then ASSERT(). If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
| OrData | The value to OR with the read value from the value. |
| UINT64 EFIAPI BitFieldOr64 | ( | IN UINT64 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT64 | OrData | ||
| ) |
Reads a bit field from a 64-bit value, performs a bitwise OR, and returns the result.
Performs a bitwise OR between the bit field specified by StartBit and EndBit in Operand and the value specified by OrData. All other bits in Operand are preserved. The new 64-bit value is returned.
If 64-bit operations are not supported, then ASSERT(). If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| OrData | The value to OR with the read value from the value |
Reads a bit field from an 8-bit value, performs a bitwise OR, and returns the result.
Performs a bitwise OR between the bit field specified by StartBit and EndBit in Operand and the value specified by OrData. All other bits in Operand are preserved. The new 8-bit value is returned.
If 8-bit operations are not supported, then ASSERT(). If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..7. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..7. |
| OrData | The value to OR with the read value from the value |
Returns a bit field from a 16-bit value.
Returns the bitfield specified by the StartBit and the EndBit from Operand.
If 16-bit operations are not supported, then ASSERT(). If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..15. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..15. |
Returns a bit field from a 32-bit value.
Returns the bitfield specified by the StartBit and the EndBit from Operand.
If 32-bit operations are not supported, then ASSERT(). If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
Returns a bit field from a 64-bit value.
Returns the bitfield specified by the StartBit and the EndBit from Operand.
If 64-bit operations are not supported, then ASSERT(). If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
Returns a bit field from an 8-bit value.
Returns the bitfield specified by the StartBit and the EndBit from Operand.
If 8-bit operations are not supported, then ASSERT(). If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..7. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..7. |
| UINT16 EFIAPI BitFieldWrite16 | ( | IN UINT16 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT16 | Value | ||
| ) |
Writes a bit field to a 16-bit value, and returns the result.
Writes Value to the bit field specified by the StartBit and the EndBit in Operand. All other bits in Operand are preserved. The new 16-bit value is returned.
If 16-bit operations are not supported, then ASSERT(). If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..15. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..15. |
| Value | New value of the bit field. |
| UINT32 EFIAPI BitFieldWrite32 | ( | IN UINT32 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT32 | Value | ||
| ) |
Writes a bit field to a 32-bit value, and returns the result.
Writes Value to the bit field specified by the StartBit and the EndBit in Operand. All other bits in Operand are preserved. The new 32-bit value is returned.
If 32-bit operations are not supported, then ASSERT(). If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..31. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..31. |
| Value | New value of the bit field. |
| UINT64 EFIAPI BitFieldWrite64 | ( | IN UINT64 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT64 | Value | ||
| ) |
Writes a bit field to a 64-bit value, and returns the result.
Writes Value to the bit field specified by the StartBit and the EndBit in Operand. All other bits in Operand are preserved. The new 64-bit value is returned.
If 64-bit operations are not supported, then ASSERT(). If StartBit is greater than 63, then ASSERT(). If EndBit is greater than 63, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..63. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..63. |
| Value | New value of the bit field. |
| UINT8 EFIAPI BitFieldWrite8 | ( | IN UINT8 | Operand, |
| IN UINTN | StartBit, | ||
| IN UINTN | EndBit, | ||
| IN UINT8 | Value | ||
| ) |
Writes a bit field to an 8-bit value, and returns the result.
Writes Value to the bit field specified by the StartBit and the EndBit in Operand. All other bits in Operand are preserved. The new 8-bit value is returned.
If 8-bit operations are not supported, then ASSERT(). If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
| Operand | Operand on which to perform the bitfield operation. |
| StartBit | The ordinal of the least significant bit in the bit field. Range 0..7. |
| EndBit | The ordinal of the most significant bit in the bit field. Range 0..7. |
| Value | New value of the bit field. |
Returns the two's complement checksum of all elements in a buffer of 16-bit values.
This function first calculates the sum of the 16-bit values in the buffer specified by Buffer and Length. The carry bits in the result of addition are dropped. Then, the two's complement of the sum is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT(). If Buffer is not aligned on a 16-bit boundary, then ASSERT(). If Length is not aligned on a 16-bit boundary, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| Buffer | The pointer to the buffer to carry out the checksum operation. |
| Length | The size, in bytes, of Buffer. |
Returns the two's complement checksum of all elements in a buffer of 32-bit values.
This function first calculates the sum of the 32-bit values in the buffer specified by Buffer and Length. The carry bits in the result of addition are dropped. Then, the two's complement of the sum is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT(). If Buffer is not aligned on a 32-bit boundary, then ASSERT(). If Length is not aligned on a 32-bit boundary, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| Buffer | The pointer to the buffer to carry out the checksum operation. |
| Length | The size, in bytes, of Buffer. |
Returns the two's complement checksum of all elements in a buffer of 64-bit values.
This function first calculates the sum of the 64-bit values in the buffer specified by Buffer and Length. The carry bits in the result of addition are dropped. Then, the two's complement of the sum is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT(). If Buffer is not aligned on a 64-bit boundary, then ASSERT(). If Length is not aligned on a 64-bit boundary, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| Buffer | The pointer to the buffer to carry out the checksum operation. |
| Length | The size, in bytes, of Buffer. |
Returns the two's complement checksum of all elements in a buffer of 8-bit values.
This function first calculates the sum of the 8-bit values in the buffer specified by Buffer and Length. The carry bits in the result of addition are dropped. Then, the two's complement of the sum is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| Buffer | The pointer to the buffer to carry out the checksum operation. |
| Length | The size, in bytes, of Buffer. |
Computes and returns a 32-bit CRC for a data buffer. CRC32 value bases on ITU-T V.42.
If Buffer is NULL, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| [in] | Buffer | A pointer to the buffer on which the 32-bit CRC is to be computed. |
| [in] | Length | The number of bytes in the buffer Data. |
| Crc32 | The 32-bit CRC was computed for the data buffer. |
Returns the sum of all elements in a buffer of 16-bit values. During calculation, the carry bits are dropped.
This function calculates the sum of the 16-bit values in the buffer specified by Buffer and Length. The carry bits in result of addition are dropped. The 16-bit result is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT(). If Buffer is not aligned on a 16-bit boundary, then ASSERT(). If Length is not aligned on a 16-bit boundary, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| Buffer | The pointer to the buffer to carry out the sum operation. |
| Length | The size, in bytes, of Buffer. |
Returns the sum of all elements in a buffer of 32-bit values. During calculation, the carry bits are dropped.
This function calculates the sum of the 32-bit values in the buffer specified by Buffer and Length. The carry bits in result of addition are dropped. The 32-bit result is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT(). If Buffer is not aligned on a 32-bit boundary, then ASSERT(). If Length is not aligned on a 32-bit boundary, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| Buffer | The pointer to the buffer to carry out the sum operation. |
| Length | The size, in bytes, of Buffer. |
Returns the sum of all elements in a buffer of 64-bit values. During calculation, the carry bits are dropped.
This function calculates the sum of the 64-bit values in the buffer specified by Buffer and Length. The carry bits in result of addition are dropped. The 64-bit result is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT(). If Buffer is not aligned on a 64-bit boundary, then ASSERT(). If Length is not aligned on a 64-bit boundary, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| Buffer | The pointer to the buffer to carry out the sum operation. |
| Length | The size, in bytes, of Buffer. |
Returns the sum of all elements in a buffer in unit of UINT8. During calculation, the carry bits are dropped.
This function calculates the sum of all elements in a buffer in unit of UINT8. The carry bits in result of addition are dropped. The result is returned as UINT8. If Length is Zero, then Zero is returned.
If Buffer is NULL, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
| Buffer | The pointer to the buffer to carry out the sum operation. |
| Length | The size, in bytes, of Buffer. |
Convert a Unicode character to upper case only if it maps to a valid small-case ASCII character.
This internal function only deal with Unicode character which maps to a valid small-case ASCII character, i.e. L'a' to L'z'. For other Unicode character, the input character is returned directly.
| Char | The character to convert. |
| LowerCharacter | If the Char is with range L'a' to L'z'. |
| Unchanged | Otherwise. |
Generates a breakpoint on the CPU.
Generates a breakpoint on the CPU. The breakpoint must be implemented such that code can resume normal execution after the breakpoint.
Executes an infinite loop.
Forces the CPU to execute an infinite loop. A debugger may be used to skip past the loop and the code that follows the loop must execute properly. This implies that the infinite loop must not cause the code that follow it to be optimized away.
Requests CPU to pause for a short period of time.
Requests CPU to pause for a short period of time. Typically used in MP systems to prevent memory starvation while waiting for a spin lock.
Converts an 8-bit value to an 8-bit BCD value.
Converts the 8-bit value specified by Value to BCD. The BCD value is returned.
If Value >= 100, then ASSERT().
| Value | The 8-bit value to convert to BCD. Range 0..99. |
Divides a 64-bit signed integer by a 64-bit signed integer and generates a 64-bit signed result and a optional 64-bit signed remainder.
This function divides the 64-bit signed value Dividend by the 64-bit signed value Divisor and generates a 64-bit signed quotient. If Remainder is not NULL, then the 64-bit signed remainder is returned in Remainder. This function returns the 64-bit signed quotient.
It is the caller's responsibility to not call this function with a Divisor of 0. If Divisor is 0, then the quotient and remainder should be assumed to be the largest negative integer.
If Divisor is 0, then ASSERT().
| Dividend | A 64-bit signed value. |
| Divisor | A 64-bit signed value. |
| Remainder | A pointer to a 64-bit signed value. This parameter is optional and may be NULL. |
Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates a 64-bit unsigned result.
This function divides the 64-bit unsigned value Dividend by the 32-bit unsigned value Divisor and generates a 64-bit unsigned quotient. This function returns the 64-bit unsigned quotient.
If Divisor is 0, then ASSERT().
| Dividend | A 64-bit unsigned value. |
| Divisor | A 32-bit unsigned value. |
Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates a 64-bit unsigned result and an optional 32-bit unsigned remainder.
This function divides the 64-bit unsigned value Dividend by the 32-bit unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder is not NULL, then the 32-bit unsigned remainder is returned in Remainder. This function returns the 64-bit unsigned quotient.
If Divisor is 0, then ASSERT().
| Dividend | A 64-bit unsigned value. |
| Divisor | A 32-bit unsigned value. |
| Remainder | A pointer to a 32-bit unsigned value. This parameter is optional and may be NULL. |
Divides a 64-bit unsigned integer by a 64-bit unsigned integer and generates a 64-bit unsigned result and an optional 64-bit unsigned remainder.
This function divides the 64-bit unsigned value Dividend by the 64-bit unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder is not NULL, then the 64-bit unsigned remainder is returned in Remainder. This function returns the 64-bit unsigned quotient.
If Divisor is 0, then ASSERT().
| Dividend | A 64-bit unsigned value. |
| Divisor | A 64-bit unsigned value. |
| Remainder | A pointer to a 64-bit unsigned value. This parameter is optional and may be NULL. |
Enables CPU interrupts for the smallest window required to capture any pending interrupts.
| LIST_ENTRY* EFIAPI GetFirstNode | ( | IN CONST LIST_ENTRY * | List | ) |
Retrieves the first node of a doubly linked list.
Returns the first node of a doubly linked list. List must have been initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(). If List is empty, then List is returned.
If List is NULL, then ASSERT(). If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), then ASSERT(). If PcdMaximumLinkedListLength is not zero, and the number of nodes in List, including the List node, is greater than or equal to PcdMaximumLinkedListLength, then ASSERT().
| List | A pointer to the head node of a doubly linked list. |
| List | The list is empty. |
Retrieves the current CPU interrupt state.
Returns TRUE if interrupts are currently enabled. Otherwise returns FALSE.
| TRUE | CPU interrupts are enabled. |
| FALSE | CPU interrupts are disabled. |
| LIST_ENTRY* EFIAPI GetNextNode | ( | IN CONST LIST_ENTRY * | List, |
| IN CONST LIST_ENTRY * | Node | ||
| ) |
Retrieves the next node of a doubly linked list.
Returns the node of a doubly linked list that follows Node. List must have been initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(). If List is empty, then List is returned.
If List is NULL, then ASSERT(). If Node is NULL, then ASSERT(). If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), then ASSERT(). If PcdMaximumLinkedListLength is not zero, and List contains more than PcdMaximumLinkedListLength nodes, then ASSERT(). If PcdVerifyNodeInList is TRUE and Node is not a node in List, then ASSERT().
| List | A pointer to the head node of a doubly linked list. |
| Node | A pointer to a node in the doubly linked list. |
Returns the value of the highest bit set in a 32-bit value. Equivalent to 1 << log2(x).
This function computes the value of the highest bit set in the 32-bit value specified by Operand. If Operand is zero, then zero is returned.
| Operand | The 32-bit operand to evaluate. |
| 0 | Operand is zero. |
Returns the value of the highest bit set in a 64-bit value. Equivalent to 1 << log2(x).
This function computes the value of the highest bit set in the 64-bit value specified by Operand. If Operand is zero, then zero is returned.
| Operand | The 64-bit operand to evaluate. |
| 0 | Operand is zero. |
| LIST_ENTRY* EFIAPI GetPreviousNode | ( | IN CONST LIST_ENTRY * | List, |
| IN CONST LIST_ENTRY * | Node | ||
| ) |
Retrieves the previous node of a doubly linked list.
Returns the node of a doubly linked list that precedes Node. List must have been initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(). If List is empty, then List is returned.
If List is NULL, then ASSERT(). If Node is NULL, then ASSERT(). If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), then ASSERT(). If PcdMaximumLinkedListLength is not zero, and List contains more than PcdMaximumLinkedListLength nodes, then ASSERT(). If PcdVerifyNodeInList is TRUE and Node is not a node in List, then ASSERT().
| List | A pointer to the head node of a doubly linked list. |
| Node | A pointer to a node in the doubly linked list. |
Returns the bit position of the highest bit set in a 32-bit value. Equivalent to log2(x).
This function computes the bit position of the highest bit set in the 32-bit value specified by Operand. If Operand is zero, then -1 is returned. Otherwise, a value between 0 and 31 is returned.
| Operand | The 32-bit operand to evaluate. |
| 0..31 | Position of the highest bit set in Operand if found. |
| -1 | Operand is zero. |
Returns the bit position of the highest bit set in a 64-bit value. Equivalent to log2(x).
This function computes the bit position of the highest bit set in the 64-bit value specified by Operand. If Operand is zero, then -1 is returned. Otherwise, a value between 0 and 63 is returned.
| Operand | The 64-bit operand to evaluate. |
| 0..63 | Position of the highest bit set in Operand if found. |
| -1 | Operand is zero. |
| LIST_ENTRY* EFIAPI InitializeListHead | ( | IN OUT LIST_ENTRY * | ListHead | ) |
Initializes the head node of a doubly linked list, and returns the pointer to the head node of the doubly linked list.
Initializes the forward and backward links of a new linked list. After initializing a linked list with this function, the other linked list functions may be used to add and remove nodes from the linked list. It is up to the caller of this function to allocate the memory for ListHead.
If ListHead is NULL, then ASSERT().
| ListHead | A pointer to the head node of a new doubly linked list. |
| LIST_ENTRY* EFIAPI InsertHeadList | ( | IN OUT LIST_ENTRY * | ListHead, |
| IN OUT LIST_ENTRY * | Entry | ||
| ) |
Adds a node to the beginning of a doubly linked list, and returns the pointer to the head node of the doubly linked list.
Adds the node Entry at the beginning of the doubly linked list denoted by ListHead, and returns ListHead.
If ListHead is NULL, then ASSERT(). If Entry is NULL, then ASSERT(). If ListHead was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), then ASSERT(). If PcdMaximumLinkedListLength is not zero, and prior to insertion the number of nodes in ListHead, including the ListHead node, is greater than or equal to PcdMaximumLinkedListLength, then ASSERT().
| ListHead | A pointer to the head node of a doubly linked list. |
| Entry | A pointer to a node that is to be inserted at the beginning of a doubly linked list. |
| LIST_ENTRY* EFIAPI InsertTailList | ( | IN OUT LIST_ENTRY * | ListHead, |
| IN OUT LIST_ENTRY * | Entry | ||
| ) |
Adds a node to the end of a doubly linked list, and returns the pointer to the head node of the doubly linked list.
Adds the node Entry to the end of the doubly linked list denoted by ListHead, and returns ListHead.
If ListHead is NULL, then ASSERT(). If Entry is NULL, then ASSERT(). If ListHead was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), then ASSERT(). If PcdMaximumLinkedListLength is not zero, and prior to insertion the number of nodes in ListHead, including the ListHead node, is greater than or equal to PcdMaximumLinkedListLength, then ASSERT().
| ListHead | A pointer to the head node of a doubly linked list. |
| Entry | A pointer to a node that is to be added at the end of the doubly linked list. |
| BOOLEAN EFIAPI IsListEmpty | ( | IN CONST LIST_ENTRY * | ListHead | ) |
Checks to see if a doubly linked list is empty or not.
Checks to see if the doubly linked list is empty. If the linked list contains zero nodes, this function returns TRUE. Otherwise, it returns FALSE.
If ListHead is NULL, then ASSERT(). If ListHead was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), then ASSERT(). If PcdMaximumLinkedListLength is not zero, and the number of nodes in List, including the List node, is greater than or equal to PcdMaximumLinkedListLength, then ASSERT().
| ListHead | A pointer to the head node of a doubly linked list. |
| TRUE | The linked list is empty. |
| FALSE | The linked list is not empty. |
| BOOLEAN EFIAPI IsNodeAtEnd | ( | IN CONST LIST_ENTRY * | List, |
| IN CONST LIST_ENTRY * | Node | ||
| ) |
Determines if a node the last node in a doubly linked list.
Returns TRUE if Node is the last node in the doubly linked list specified by List. Otherwise, FALSE is returned. List must have been initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead().
If List is NULL, then ASSERT(). If Node is NULL, then ASSERT(). If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), then ASSERT(). If PcdMaximumLinkedListLength is not zero, and the number of nodes in List, including the List node, is greater than or equal to PcdMaximumLinkedListLength, then ASSERT(). If PcdVerifyNodeInList is TRUE and Node is not a node in List, then ASSERT().
| List | A pointer to the head node of a doubly linked list. |
| Node | A pointer to a node in the doubly linked list. |
| TRUE | Node is the last node in the linked list. |
| FALSE | Node is not the last node in the linked list. |
| BOOLEAN EFIAPI IsNodeInList | ( | IN CONST LIST_ENTRY * | FirstEntry, |
| IN CONST LIST_ENTRY * | SecondEntry | ||
| ) |
Checks whether FirstEntry and SecondEntry are part of the same doubly-linked list.
If FirstEntry is NULL, then ASSERT(). If FirstEntry->ForwardLink is NULL, then ASSERT(). If FirstEntry->BackLink is NULL, then ASSERT(). If SecondEntry is NULL, then ASSERT(); If PcdMaximumLinkedListLength is not zero, and List contains more than PcdMaximumLinkedListLength nodes, then ASSERT().
| FirstEntry | A pointer to a node in a linked list. |
| SecondEntry | A pointer to the node to locate. |
| TRUE | SecondEntry is in the same doubly-linked list as FirstEntry. |
| FALSE | SecondEntry isn't in the same doubly-linked list as FirstEntry, or FirstEntry is invalid. |
| BOOLEAN EFIAPI IsNull | ( | IN CONST LIST_ENTRY * | List, |
| IN CONST LIST_ENTRY * | Node | ||
| ) |
Determines if a node in a doubly linked list is the head node of a the same doubly linked list. This function is typically used to terminate a loop that traverses all the nodes in a doubly linked list starting with the head node.
Returns TRUE if Node is equal to List. Returns FALSE if Node is one of the nodes in the doubly linked list specified by List. List must have been initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead().
If List is NULL, then ASSERT(). If Node is NULL, then ASSERT(). If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), then ASSERT(). If PcdMaximumLinkedListLength is not zero, and the number of nodes in List, including the List node, is greater than or equal to PcdMaximumLinkedListLength, then ASSERT(). If PcdVerifyNodeInList is TRUE and Node is not a node in List the and Node is not equal to List, then ASSERT().
| List | A pointer to the head node of a doubly linked list. |
| Node | A pointer to a node in the doubly linked list. |
| TRUE | Node is the head of the doubly-linked list pointed by List. |
| FALSE | Node is not the head of the doubly-linked list pointed by List. |
Restores the CPU context that was saved with SetJump().
Restores the CPU context from the buffer specified by JumpBuffer. This function never returns to the caller. Instead is resumes execution based on the state of JumpBuffer.
If JumpBuffer is NULL, then ASSERT(). For Itanium processors, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT(). If Value is 0, then ASSERT().
| JumpBuffer | A pointer to CPU context buffer. |
| Value | The value to return when the SetJump() context is restored and must be non-zero. |
Returns the bit position of the lowest bit set in a 32-bit value.
This function computes the bit position of the lowest bit set in the 32-bit value specified by Operand. If Operand is zero, then -1 is returned. Otherwise, a value between 0 and 31 is returned.
| Operand | The 32-bit operand to evaluate. |
| 0..31 | The lowest bit set in Operand was found. |
| -1 | Operand is zero. |
Returns the bit position of the lowest bit set in a 64-bit value.
This function computes the bit position of the lowest bit set in the 64-bit value specified by Operand. If Operand is zero, then -1 is returned. Otherwise, a value between 0 and 63 is returned.
| Operand | The 64-bit operand to evaluate. |
| 0..63 | The lowest bit set in Operand was found. |
| -1 | Operand is zero. |
Rotates a 32-bit integer left between 0 and 31 bits, filling the low bits with the high bits that were rotated.
This function rotates the 32-bit value Operand to the left by Count bits. The low Count bits are fill with the high Count bits of Operand. The rotated value is returned.
If Count is greater than 31, then ASSERT().
| Operand | The 32-bit operand to rotate left. |
| Count | The number of bits to rotate left. |
Rotates a 64-bit integer left between 0 and 63 bits, filling the low bits with the high bits that were rotated.
This function rotates the 64-bit value Operand to the left by Count bits. The low Count bits are fill with the high Count bits of Operand. The rotated value is returned.
If Count is greater than 63, then ASSERT().
| Operand | The 64-bit operand to rotate left. |
| Count | The number of bits to rotate left. |
Shifts a 64-bit integer left between 0 and 63 bits. The low bits are filled with zeros. The shifted value is returned.
This function shifts the 64-bit value Operand to the left by Count bits. The low Count bits are set to zero. The shifted value is returned.
If Count is greater than 63, then ASSERT().
| Operand | The 64-bit operand to shift left. |
| Count | The number of bits to shift left. |
Used to serialize load and store operations.
All loads and stores that proceed calls to this function are guaranteed to be globally visible when this function returns.
Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates a 32-bit unsigned remainder.
This function divides the 64-bit unsigned value Dividend by the 32-bit unsigned value Divisor and generates a 32-bit remainder. This function returns the 32-bit unsigned remainder.
If Divisor is 0, then ASSERT().
| Dividend | A 64-bit unsigned value. |
| Divisor | A 32-bit unsigned value. |
Multiples a 64-bit signed integer by a 64-bit signed integer and generates a 64-bit signed result.
This function multiples the 64-bit signed value Multiplicand by the 64-bit signed value Multiplier and generates a 64-bit signed result. This 64-bit signed result is returned.
| Multiplicand | A 64-bit signed value. |
| Multiplier | A 64-bit signed value. |
Multiples a 64-bit unsigned integer by a 32-bit unsigned integer and generates a 64-bit unsigned result.
This function multiples the 64-bit unsigned value Multiplicand by the 32-bit unsigned value Multiplier and generates a 64-bit unsigned result. This 64- bit unsigned result is returned.
| Multiplicand | A 64-bit unsigned value. |
| Multiplier | A 32-bit unsigned value. |
Multiples a 64-bit unsigned integer by a 64-bit unsigned integer and generates a 64-bit unsigned result.
This function multiples the 64-bit unsigned value Multiplicand by the 64-bit unsigned value Multiplier and generates a 64-bit unsigned result. This 64- bit unsigned result is returned.
| Multiplicand | A 64-bit unsigned value. |
| Multiplier | A 64-bit unsigned value. |
| VOID EFIAPI PatchInstructionX86 | ( | OUT X86_ASSEMBLY_PATCH_LABEL * | InstructionEnd, |
| IN UINT64 | PatchValue, | ||
| IN UINTN | ValueSize | ||
| ) |
Patch the immediate operand of an IA32 or X64 instruction such that the byte, word, dword or qword operand is encoded at the end of the instruction's binary representation.
This function should be used to update object code that was compiled with NASM from assembly source code. Example:
NASM source code:
mov eax, strict dword 0 ; the imm32 zero operand will be patched
ASM_PFX(gPatchCr3): mov cr3, eax
C source code:
X86_ASSEMBLY_PATCH_LABEL gPatchCr3; PatchInstructionX86 (gPatchCr3, AsmReadCr3 (), 4);
| [out] | InstructionEnd | Pointer right past the instruction to patch. The immediate operand to patch is expected to comprise the trailing bytes of the instruction. If InstructionEnd is closer to address 0 than ValueSize permits, then ASSERT(). |
| [in] | PatchValue | The constant to write to the immediate operand. The caller is responsible for ensuring that PatchValue can be represented in the byte, word, dword or qword operand (as indicated through ValueSize); otherwise ASSERT(). |
| [in] | ValueSize | The size of the operand in bytes; must be 1, 2, 4, or 8. ASSERT() otherwise. |
Function to clean up paths.
This will be done inline and the existing buffer may be larger than required upon completion.
| [in] | Path | The pointer to the string containing the path. |
Removes the last directory or file entry in a path.
| [in,out] | Path | The pointer to the path to modify. |
| FALSE | Nothing was found to remove. |
| TRUE | A directory or file was removed. |
| VOID EFIAPI QuickSort | ( | IN OUT VOID * | BufferToSort, |
| IN CONST UINTN | Count, | ||
| IN CONST UINTN | ElementSize, | ||
| IN BASE_SORT_COMPARE | CompareFunction, | ||
| OUT VOID * | BufferOneElement | ||
| ) |
This function is identical to perform QuickSort, except that is uses the pre-allocated buffer so the in place sorting does not need to allocate and free buffers constantly.
Each element must be equal sized.
if BufferToSort is NULL, then ASSERT. if CompareFunction is NULL, then ASSERT. if BufferOneElement is NULL, then ASSERT. if ElementSize is < 1, then ASSERT.
if Count is < 2 then perform no action.
| [in,out] | BufferToSort | on call a Buffer of (possibly sorted) elements on return a buffer of sorted elements |
| [in] | Count | the number of elements in the buffer to sort |
| [in] | ElementSize | Size of an element in bytes |
| [in] | CompareFunction | The function to call to perform the comparison of any 2 elements |
| [out] | BufferOneElement | Caller provided buffer whose size equals to ElementSize. It's used by QuickSort() for swapping in sorting. |
Reads a 16-bit value from memory that may be unaligned.
This function returns the 16-bit value pointed to by Buffer. The function guarantees that the read operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
| Buffer | The pointer to a 16-bit value that may be unaligned. |
Reads a 24-bit value from memory that may be unaligned.
This function returns the 24-bit value pointed to by Buffer. The function guarantees that the read operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
| Buffer | The pointer to a 24-bit value that may be unaligned. |
Reads a 32-bit value from memory that may be unaligned.
This function returns the 32-bit value pointed to by Buffer. The function guarantees that the read operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
| Buffer | The pointer to a 32-bit value that may be unaligned. |
Reads a 64-bit value from memory that may be unaligned.
This function returns the 64-bit value pointed to by Buffer. The function guarantees that the read operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
| Buffer | The pointer to a 64-bit value that may be unaligned. |
| LIST_ENTRY* EFIAPI RemoveEntryList | ( | IN CONST LIST_ENTRY * | Entry | ) |
Removes a node from a doubly linked list, and returns the node that follows the removed node.
Removes the node Entry from a doubly linked list. It is up to the caller of this function to release the memory used by this node if that is required. On exit, the node following Entry in the doubly linked list is returned. If Entry is the only node in the linked list, then the head node of the linked list is returned.
If Entry is NULL, then ASSERT(). If Entry is the head node of an empty list, then ASSERT(). If PcdMaximumLinkedListLength is not zero, and the number of nodes in the linked list containing Entry, including the Entry node, is greater than or equal to PcdMaximumLinkedListLength, then ASSERT().
| Entry | A pointer to a node in a linked list. |
Rotates a 32-bit integer right between 0 and 31 bits, filling the high bits with the low bits that were rotated.
This function rotates the 32-bit value Operand to the right by Count bits. The high Count bits are fill with the low Count bits of Operand. The rotated value is returned.
If Count is greater than 31, then ASSERT().
| Operand | The 32-bit operand to rotate right. |
| Count | The number of bits to rotate right. |
Rotates a 64-bit integer right between 0 and 63 bits, filling the high bits with the high low bits that were rotated.
This function rotates the 64-bit value Operand to the right by Count bits. The high Count bits are fill with the low Count bits of Operand. The rotated value is returned.
If Count is greater than 63, then ASSERT().
| Operand | The 64-bit operand to rotate right. |
| Count | The number of bits to rotate right. |
Shifts a 64-bit integer right between 0 and 63 bits. This high bits are filled with zeros. The shifted value is returned.
This function shifts the 64-bit value Operand to the right by Count bits. The high Count bits are set to zero. The shifted value is returned.
If Count is greater than 63, then ASSERT().
| Operand | The 64-bit operand to shift right. |
| Count | The number of bits to shift right. |
Disables CPU interrupts and returns the interrupt state prior to the disable operation.
| TRUE | CPU interrupts were enabled on entry to this call. |
| FALSE | CPU interrupts were disabled on entry to this call. |
Set the current CPU interrupt state.
Sets the current CPU interrupt state to the state specified by InterruptState. If InterruptState is TRUE, then interrupts are enabled. If InterruptState is FALSE, then interrupts are disabled. InterruptState is returned.
| InterruptState | TRUE if interrupts should enabled. FALSE if interrupts should be disabled. |
| RETURNS_TWICE UINTN EFIAPI SetJump | ( | JumpBuffer | ) |
Saves the current CPU context that can be restored with a call to LongJump() and returns 0.
Saves the current CPU context in the buffer specified by JumpBuffer and returns 0. The initial call to SetJump() must always return 0. Subsequent calls to LongJump() cause a non-zero value to be returned by SetJump().
If JumpBuffer is NULL, then ASSERT(). For Itanium processors, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().
| JumpBuffer | A pointer to CPU context buffer. |
| 0 | Indicates a return from SetJump(). |
Uses as a barrier to stop speculative execution.
Ensures that no later instruction will execute speculatively, until all prior instructions have completed.
| RETURN_STATUS EFIAPI StrCatS | ( | IN OUT CHAR16 * | Destination, |
| IN UINTN | DestMax, | ||
| IN CONST CHAR16 * | Source | ||
| ) |
Appends a copy of the string pointed to by Source (including the terminating null char) to the end of the string pointed to by Destination.
This function is similar as strcat_s defined in C11.
If Destination is not aligned on a 16-bit boundary, then ASSERT(). If Source is not aligned on a 16-bit boundary, then ASSERT().
If an error is returned, then the Destination is unmodified.
| Destination | A pointer to a Null-terminated Unicode string. |
| DestMax | The maximum number of Destination Unicode char, including terminating null char. |
| Source | A pointer to a Null-terminated Unicode string. |
| RETURN_SUCCESS | String is appended. |
| RETURN_BAD_BUFFER_SIZE | If DestMax is NOT greater than StrLen(Destination). |
| RETURN_BUFFER_TOO_SMALL | If (DestMax - StrLen(Destination)) is NOT greater than StrLen(Source). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumUnicodeStringLength is not zero, and DestMax is greater than PcdMaximumUnicodeStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
Compares two Null-terminated Unicode strings, and returns the difference between the first mismatched Unicode characters.
This function compares the Null-terminated Unicode string FirstString to the Null-terminated Unicode string SecondString. If FirstString is identical to SecondString, then 0 is returned. Otherwise, the value returned is the first mismatched Unicode character in SecondString subtracted from the first mismatched Unicode character in FirstString.
If FirstString is NULL, then ASSERT(). If FirstString is not aligned on a 16-bit boundary, then ASSERT(). If SecondString is NULL, then ASSERT(). If SecondString is not aligned on a 16-bit boundary, then ASSERT(). If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more than PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then ASSERT(). If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more than PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator, then ASSERT().
| FirstString | The pointer to a Null-terminated Unicode string. |
| SecondString | The pointer to a Null-terminated Unicode string. |
| 0 | FirstString is identical to SecondString. |
| RETURN_STATUS EFIAPI StrCpyS | ( | OUT CHAR16 * | Destination, |
| IN UINTN | DestMax, | ||
| IN CONST CHAR16 * | Source | ||
| ) |
Copies the string pointed to by Source (including the terminating null char) to the array pointed to by Destination.
This function is similar as strcpy_s defined in C11.
If Destination is not aligned on a 16-bit boundary, then ASSERT(). If Source is not aligned on a 16-bit boundary, then ASSERT().
If an error is returned, then the Destination is unmodified.
| Destination | A pointer to a Null-terminated Unicode string. |
| DestMax | The maximum number of Destination Unicode char, including terminating null char. |
| Source | A pointer to a Null-terminated Unicode string. |
| RETURN_SUCCESS | String is copied. |
| RETURN_BUFFER_TOO_SMALL | If DestMax is NOT greater than StrLen(Source). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumUnicodeStringLength is not zero, and DestMax is greater than PcdMaximumUnicodeStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
Convert a Null-terminated Unicode decimal string to a value of type UINT64.
This function returns a value of type UINT64 by interpreting the contents of the Unicode string specified by String as a decimal number. The format of the input Unicode string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The function will ignore the pad space, which includes spaces or tab characters, before [decimal digits]. The running zero in the beginning of [decimal digits] will be ignored. Then, the function stops at the first character that is a not a valid decimal character or a Null-terminator, whichever one comes first.
If String is NULL, then ASSERT(). If String is not aligned in a 16-bit boundary, then ASSERT(). If String has only pad spaces, then 0 is returned. If String has no pad spaces or valid decimal digits, then 0 is returned. If the number represented by String overflows according to the range defined by UINT64, then MAX_UINT64 is returned.
If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated Unicode string. |
| Value | translated from String. |
| RETURN_STATUS EFIAPI StrDecimalToUint64S | ( | IN CONST CHAR16 * | String, |
| OUT CHAR16 ** | EndPointer, | ||
| OUT UINT64 * | Data | ||
| ) |
Convert a Null-terminated Unicode decimal string to a value of type UINT64.
This function outputs a value of type UINT64 by interpreting the contents of the Unicode string specified by String as a decimal number. The format of the input Unicode string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The function will ignore the pad space, which includes spaces or tab characters, before [decimal digits]. The running zero in the beginning of [decimal digits] will be ignored. Then, the function stops at the first character that is a not a valid decimal character or a Null-terminator, whichever one comes first.
If String is not aligned in a 16-bit boundary, then ASSERT().
If String has no valid decimal digits in the above format, then 0 is stored at the location pointed to by Data. If the number represented by String exceeds the range defined by UINT64, then MAX_UINT64 is stored at the location pointed to by Data.
If EndPointer is not NULL, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer. If String has no valid decimal digits right after the optional pad spaces, the value of String is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Unicode string. |
| EndPointer | Pointer to character that stops scan. |
| Data | Pointer to the converted value. |
| RETURN_SUCCESS | Value is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator. |
| RETURN_UNSUPPORTED | If the number represented by String exceeds the range defined by UINT64. |
Convert a Null-terminated Unicode decimal string to a value of type UINTN.
This function returns a value of type UINTN by interpreting the contents of the Unicode string specified by String as a decimal number. The format of the input Unicode string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The function will ignore the pad space, which includes spaces or tab characters, before [decimal digits]. The running zero in the beginning of [decimal digits] will be ignored. Then, the function stops at the first character that is a not a valid decimal character or a Null-terminator, whichever one comes first.
If String is NULL, then ASSERT(). If String is not aligned in a 16-bit boundary, then ASSERT(). If String has only pad spaces, then 0 is returned. If String has no pad spaces or valid decimal digits, then 0 is returned. If the number represented by String overflows according to the range defined by UINTN, then MAX_UINTN is returned.
If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated Unicode string. |
| Value | translated from String. |
| RETURN_STATUS EFIAPI StrDecimalToUintnS | ( | IN CONST CHAR16 * | String, |
| OUT CHAR16 ** | EndPointer, | ||
| OUT UINTN * | Data | ||
| ) |
Convert a Null-terminated Unicode decimal string to a value of type UINTN.
This function outputs a value of type UINTN by interpreting the contents of the Unicode string specified by String as a decimal number. The format of the input Unicode string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The function will ignore the pad space, which includes spaces or tab characters, before [decimal digits]. The running zero in the beginning of [decimal digits] will be ignored. Then, the function stops at the first character that is a not a valid decimal character or a Null-terminator, whichever one comes first.
If String is not aligned in a 16-bit boundary, then ASSERT().
If String has no valid decimal digits in the above format, then 0 is stored at the location pointed to by Data. If the number represented by String exceeds the range defined by UINTN, then MAX_UINTN is stored at the location pointed to by Data.
If EndPointer is not NULL, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer. If String has no valid decimal digits right after the optional pad spaces, the value of String is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Unicode string. |
| EndPointer | Pointer to character that stops scan. |
| Data | Pointer to the converted value. |
| RETURN_SUCCESS | Value is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator. |
| RETURN_UNSUPPORTED | If the number represented by String exceeds the range defined by UINTN. |
| RETURN_STATUS EFIAPI StrHexToBytes | ( | IN CONST CHAR16 * | String, |
| IN UINTN | Length, | ||
| OUT UINT8 * | Buffer, | ||
| IN UINTN | MaxBufferSize | ||
| ) |
Convert a Null-terminated Unicode hexadecimal string to a byte array.
This function outputs a byte array by interpreting the contents of the Unicode string specified by String in hexadecimal format. The format of the input Unicode string String is:
[XX]*
X is a hexadecimal digit character in the range [0-9], [a-f] and [A-F]. The function decodes every two hexadecimal digit characters as one byte. The decoding stops after Length of characters and outputs Buffer containing (Length / 2) bytes.
If String is not aligned in a 16-bit boundary, then ASSERT().
| String | Pointer to a Null-terminated Unicode string. |
| Length | The number of Unicode characters to decode. |
| Buffer | Pointer to the converted bytes array. |
| MaxBufferSize | The maximum size of Buffer. |
| RETURN_SUCCESS | Buffer is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If Length is not multiple of 2. If PcdMaximumUnicodeStringLength is not zero, and Length is greater than PcdMaximumUnicodeStringLength. |
| RETURN_UNSUPPORTED | If Length of characters from String contain a character that is not valid hexadecimal digit characters, or a Null-terminator. |
| RETURN_BUFFER_TOO_SMALL | If MaxBufferSize is less than (Length / 2). |
Convert a Null-terminated Unicode hexadecimal string to a value of type UINT64.
This function returns a value of type UINT64 by interpreting the contents of the Unicode string specified by String as a hexadecimal number. The format of the input Unicode string String is
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" appears in the input string, it must be prefixed with at least one 0. The function will ignore the pad space, which includes spaces or tab characters, before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal digit. Then, the function stops at the first character that is a not a valid hexadecimal character or NULL, whichever one comes first.
If String is NULL, then ASSERT(). If String is not aligned in a 16-bit boundary, then ASSERT(). If String has only pad spaces, then zero is returned. If String has no leading pad spaces, leading zeros or valid hexadecimal digits, then zero is returned. If the number represented by String overflows according to the range defined by UINT64, then MAX_UINT64 is returned.
If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated Unicode string. |
| Value | translated from String. |
| RETURN_STATUS EFIAPI StrHexToUint64S | ( | IN CONST CHAR16 * | String, |
| OUT CHAR16 ** | EndPointer, | ||
| OUT UINT64 * | Data | ||
| ) |
Convert a Null-terminated Unicode hexadecimal string to a value of type UINT64.
This function outputs a value of type UINT64 by interpreting the contents of the Unicode string specified by String as a hexadecimal number. The format of the input Unicode string String is:
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" appears in the input string, it must be prefixed with at least one 0. The function will ignore the pad space, which includes spaces or tab characters, before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal digit. Then, the function stops at the first character that is a not a valid hexadecimal character or NULL, whichever one comes first.
If String is not aligned in a 16-bit boundary, then ASSERT().
If String has no valid hexadecimal digits in the above format, then 0 is stored at the location pointed to by Data. If the number represented by String exceeds the range defined by UINT64, then MAX_UINT64 is stored at the location pointed to by Data.
If EndPointer is not NULL, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer. If String has no valid hexadecimal digits right after the optional pad spaces, the value of String is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Unicode string. |
| EndPointer | Pointer to character that stops scan. |
| Data | Pointer to the converted value. |
| RETURN_SUCCESS | Value is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator. |
| RETURN_UNSUPPORTED | If the number represented by String exceeds the range defined by UINT64. |
Convert a Null-terminated Unicode hexadecimal string to a value of type UINTN.
This function returns a value of type UINTN by interpreting the contents of the Unicode string specified by String as a hexadecimal number. The format of the input Unicode string String is:
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" appears in the input string, it must be prefixed with at least one 0. The function will ignore the pad space, which includes spaces or tab characters, before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal digit. Then, the function stops at the first character that is a not a valid hexadecimal character or NULL, whichever one comes first.
If String is NULL, then ASSERT(). If String is not aligned in a 16-bit boundary, then ASSERT(). If String has only pad spaces, then zero is returned. If String has no leading pad spaces, leading zeros or valid hexadecimal digits, then zero is returned. If the number represented by String overflows according to the range defined by UINTN, then MAX_UINTN is returned.
If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated Unicode string. |
| Value | translated from String. |
| RETURN_STATUS EFIAPI StrHexToUintnS | ( | IN CONST CHAR16 * | String, |
| OUT CHAR16 ** | EndPointer, | ||
| OUT UINTN * | Data | ||
| ) |
Convert a Null-terminated Unicode hexadecimal string to a value of type UINTN.
This function outputs a value of type UINTN by interpreting the contents of the Unicode string specified by String as a hexadecimal number. The format of the input Unicode string String is:
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" appears in the input string, it must be prefixed with at least one 0. The function will ignore the pad space, which includes spaces or tab characters, before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal digit. Then, the function stops at the first character that is a not a valid hexadecimal character or NULL, whichever one comes first.
If String is not aligned in a 16-bit boundary, then ASSERT().
If String has no valid hexadecimal digits in the above format, then 0 is stored at the location pointed to by Data. If the number represented by String exceeds the range defined by UINTN, then MAX_UINTN is stored at the location pointed to by Data.
If EndPointer is not NULL, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer. If String has no valid hexadecimal digits right after the optional pad spaces, the value of String is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Unicode string. |
| EndPointer | Pointer to character that stops scan. |
| Data | Pointer to the converted value. |
| RETURN_SUCCESS | Value is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator. |
| RETURN_UNSUPPORTED | If the number represented by String exceeds the range defined by UINTN. |
Returns the length of a Null-terminated Unicode string.
This function returns the number of Unicode characters in the Null-terminated Unicode string specified by String.
If String is NULL, then ASSERT(). If String is not aligned on a 16-bit boundary, then ASSERT(). If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then ASSERT().
| String | Pointer to a Null-terminated Unicode string. |
| RETURN_STATUS EFIAPI StrnCatS | ( | IN OUT CHAR16 * | Destination, |
| IN UINTN | DestMax, | ||
| IN CONST CHAR16 * | Source, | ||
| IN UINTN | Length | ||
| ) |
Appends not more than Length successive char from the string pointed to by Source to the end of the string pointed to by Destination. If no null char is copied from Source, then Destination[StrLen(Destination) + Length] is always set to null.
This function is similar as strncat_s defined in C11.
If Destination is not aligned on a 16-bit boundary, then ASSERT(). If Source is not aligned on a 16-bit boundary, then ASSERT().
If an error is returned, then the Destination is unmodified.
| Destination | A pointer to a Null-terminated Unicode string. |
| DestMax | The maximum number of Destination Unicode char, including terminating null char. |
| Source | A pointer to a Null-terminated Unicode string. |
| Length | The maximum number of Unicode characters to copy. |
| RETURN_SUCCESS | String is appended. |
| RETURN_BAD_BUFFER_SIZE | If DestMax is NOT greater than StrLen(Destination). |
| RETURN_BUFFER_TOO_SMALL | If (DestMax - StrLen(Destination)) is NOT greater than MIN(StrLen(Source), Length). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumUnicodeStringLength is not zero, and DestMax is greater than PcdMaximumUnicodeStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
| INTN EFIAPI StrnCmp | ( | IN CONST CHAR16 * | FirstString, |
| IN CONST CHAR16 * | SecondString, | ||
| IN UINTN | Length | ||
| ) |
Compares up to a specified length the contents of two Null-terminated Unicode strings, and returns the difference between the first mismatched Unicode characters.
This function compares the Null-terminated Unicode string FirstString to the Null-terminated Unicode string SecondString. At most, Length Unicode characters will be compared. If Length is 0, then 0 is returned. If FirstString is identical to SecondString, then 0 is returned. Otherwise, the value returned is the first mismatched Unicode character in SecondString subtracted from the first mismatched Unicode character in FirstString.
If Length > 0 and FirstString is NULL, then ASSERT(). If Length > 0 and FirstString is not aligned on a 16-bit boundary, then ASSERT(). If Length > 0 and SecondString is NULL, then ASSERT(). If Length > 0 and SecondString is not aligned on a 16-bit boundary, then ASSERT(). If PcdMaximumUnicodeStringLength is not zero, and Length is greater than PcdMaximumUnicodeStringLength, then ASSERT(). If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more than PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator, then ASSERT(). If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more than PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator, then ASSERT().
| FirstString | The pointer to a Null-terminated Unicode string. |
| SecondString | The pointer to a Null-terminated Unicode string. |
| Length | The maximum number of Unicode characters to compare. |
| 0 | FirstString is identical to SecondString. |
| RETURN_STATUS EFIAPI StrnCpyS | ( | OUT CHAR16 * | Destination, |
| IN UINTN | DestMax, | ||
| IN CONST CHAR16 * | Source, | ||
| IN UINTN | Length | ||
| ) |
Copies not more than Length successive char from the string pointed to by Source to the array pointed to by Destination. If no null char is copied from Source, then Destination[Length] is always set to null.
This function is similar as strncpy_s defined in C11.
If Length > 0 and Destination is not aligned on a 16-bit boundary, then ASSERT(). If Length > 0 and Source is not aligned on a 16-bit boundary, then ASSERT().
If an error is returned, then the Destination is unmodified.
| Destination | A pointer to a Null-terminated Unicode string. |
| DestMax | The maximum number of Destination Unicode char, including terminating null char. |
| Source | A pointer to a Null-terminated Unicode string. |
| Length | The maximum number of Unicode characters to copy. |
| RETURN_SUCCESS | String is copied. |
| RETURN_BUFFER_TOO_SMALL | If DestMax is NOT greater than MIN(StrLen(Source), Length). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumUnicodeStringLength is not zero, and DestMax is greater than PcdMaximumUnicodeStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
Returns the length of a Null-terminated Unicode string.
This function is similar as strlen_s defined in C11.
If String is not aligned on a 16-bit boundary, then ASSERT().
| String | A pointer to a Null-terminated Unicode string. |
| MaxSize | The maximum number of Destination Unicode char, including terminating null char. |
| 0 | If String is NULL. |
| MaxSize | If there is no null character in the first MaxSize characters of String. |
Returns the size of a Null-terminated Unicode string in bytes, including the Null terminator.
This function returns the size of the Null-terminated Unicode string specified by String in bytes, including the Null terminator.
If String is not aligned on a 16-bit boundary, then ASSERT().
| String | A pointer to a Null-terminated Unicode string. |
| MaxSize | The maximum number of Destination Unicode char, including the Null terminator. |
| 0 | If String is NULL. |
| (sizeof | (CHAR16) * (MaxSize + 1)) If there is no Null terminator in the first MaxSize characters of String. |
Returns the size of a Null-terminated Unicode string in bytes, including the Null terminator.
This function returns the size, in bytes, of the Null-terminated Unicode string specified by String.
If String is NULL, then ASSERT(). If String is not aligned on a 16-bit boundary, then ASSERT(). If PcdMaximumUnicodeStringLength is not zero, and String contains more than PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated Unicode string. |
Returns the first occurrence of a Null-terminated Unicode sub-string in a Null-terminated Unicode string.
This function scans the contents of the Null-terminated Unicode string specified by String and returns the first occurrence of SearchString. If SearchString is not found in String, then NULL is returned. If the length of SearchString is zero, then String is returned.
If String is NULL, then ASSERT(). If String is not aligned on a 16-bit boundary, then ASSERT(). If SearchString is NULL, then ASSERT(). If SearchString is not aligned on a 16-bit boundary, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and SearchString or String contains more than PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator, then ASSERT().
| String | The pointer to a Null-terminated Unicode string. |
| SearchString | The pointer to a Null-terminated Unicode string to search for. |
| NULL | If the SearchString does not appear in String. |
Convert a Null-terminated Unicode GUID string to a value of type EFI_GUID.
This function outputs a GUID value by interpreting the contents of the Unicode string specified by String. The format of the input Unicode string String consists of 36 characters, as follows:
aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
The pairs aa - pp are two characters in the range [0-9], [a-f] and [A-F], with each pair representing a single byte hexadecimal value.
The mapping between String and the EFI_GUID structure is as follows: aa Data1[24:31] bb Data1[16:23] cc Data1[8:15] dd Data1[0:7] ee Data2[8:15] ff Data2[0:7] gg Data3[8:15] hh Data3[0:7] ii Data4[0:7] jj Data4[8:15] kk Data4[16:23] ll Data4[24:31] mm Data4[32:39] nn Data4[40:47] oo Data4[48:55] pp Data4[56:63]
If String is not aligned in a 16-bit boundary, then ASSERT().
| String | Pointer to a Null-terminated Unicode string. |
| Guid | Pointer to the converted GUID. |
| RETURN_SUCCESS | Guid is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. |
| RETURN_UNSUPPORTED | If String is not as the above format. |
| RETURN_STATUS EFIAPI StrToIpv4Address | ( | IN CONST CHAR16 * | String, |
| OUT CHAR16 ** | EndPointer, | ||
| OUT IPv4_ADDRESS * | Address, | ||
| OUT UINT8 * | PrefixLength | ||
| ) |
Convert a Null-terminated Unicode string to IPv4 address and prefix length.
This function outputs a value of type IPv4_ADDRESS and may output a value of type UINT8 by interpreting the contents of the Unicode string specified by String. The format of the input Unicode string String is as follows:
D.D.D.D[/P]
D and P are decimal digit characters in the range [0-9]. The running zero in the beginning of D and P will be ignored. /P is optional.
When /P is not in the String, the function stops at the first character that is not a valid decimal digit character after four D's are converted.
When /P is in the String, the function stops at the first character that is not a valid decimal digit character after P is converted.
If String is not aligned in a 16-bit boundary, then ASSERT().
If EndPointer is not NULL and Address is translated from String, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Unicode string. |
| EndPointer | Pointer to character that stops scan. |
| Address | Pointer to the converted IPv4 address. |
| PrefixLength | Pointer to the converted IPv4 address prefix length. MAX_UINT8 is returned when /P is not in the String. |
| RETURN_SUCCESS | Address is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. |
| RETURN_UNSUPPORTED | If String is not in the correct format. If any decimal number converted from D exceeds 255. If the decimal number converted from P exceeds 32. |
| RETURN_STATUS EFIAPI StrToIpv6Address | ( | IN CONST CHAR16 * | String, |
| OUT CHAR16 ** | EndPointer, | ||
| OUT IPv6_ADDRESS * | Address, | ||
| OUT UINT8 * | PrefixLength | ||
| ) |
Convert a Null-terminated Unicode string to IPv6 address and prefix length.
This function outputs a value of type IPv6_ADDRESS and may output a value of type UINT8 by interpreting the contents of the Unicode string specified by String. The format of the input Unicode string String is as follows:
X:X:X:X:X:X:X:X[/P]
X contains one to four hexadecimal digit characters in the range [0-9], [a-f] and [A-F]. X is converted to a value of type UINT16, whose low byte is stored in low memory address and high byte is stored in high memory address. P contains decimal digit characters in the range [0-9]. The running zero in the beginning of P will be ignored. /P is optional.
When /P is not in the String, the function stops at the first character that is not a valid hexadecimal digit character after eight X's are converted.
When /P is in the String, the function stops at the first character that is not a valid decimal digit character after P is converted.
"::" can be used to compress one or more groups of X when X contains only 0. The "::" can only appear once in the String.
If String is not aligned in a 16-bit boundary, then ASSERT().
If EndPointer is not NULL and Address is translated from String, a pointer to the character that stopped the scan is stored at the location pointed to by EndPointer.
| String | Pointer to a Null-terminated Unicode string. |
| EndPointer | Pointer to character that stops scan. |
| Address | Pointer to the converted IPv6 address. |
| PrefixLength | Pointer to the converted IPv6 address prefix length. MAX_UINT8 is returned when /P is not in the String. |
| RETURN_SUCCESS | Address is translated from String. |
| RETURN_INVALID_PARAMETER | If String is NULL. If Data is NULL. |
| RETURN_UNSUPPORTED | If X contains more than four hexadecimal digit characters. If String contains "::" and number of X is not less than 8. If P starts with character that is not a valid decimal digit character. If the decimal number converted from P exceeds 128. |
Switches the endianness of a 16-bit integer.
This function swaps the bytes in a 16-bit unsigned value to switch the value from little endian to big endian or vice versa. The byte swapped value is returned.
| Value | A 16-bit unsigned value. |
Switches the endianness of a 32-bit integer.
This function swaps the bytes in a 32-bit unsigned value to switch the value from little endian to big endian or vice versa. The byte swapped value is returned.
| Value | A 32-bit unsigned value. |
Switches the endianness of a 64-bit integer.
This function swaps the bytes in a 64-bit unsigned value to switch the value from little endian to big endian or vice versa. The byte swapped value is returned.
| Value | A 64-bit unsigned value. |
| LIST_ENTRY* EFIAPI SwapListEntries | ( | IN OUT LIST_ENTRY * | FirstEntry, |
| IN OUT LIST_ENTRY * | SecondEntry | ||
| ) |
Swaps the location of two nodes in a doubly linked list, and returns the first node after the swap.
If FirstEntry is identical to SecondEntry, then SecondEntry is returned. Otherwise, the location of the FirstEntry node is swapped with the location of the SecondEntry node in a doubly linked list. SecondEntry must be in the same double linked list as FirstEntry and that double linked list must have been initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(). SecondEntry is returned after the nodes are swapped.
If FirstEntry is NULL, then ASSERT(). If SecondEntry is NULL, then ASSERT(). If PcdVerifyNodeInList is TRUE and SecondEntry and FirstEntry are not in the same linked list, then ASSERT(). If PcdMaximumLinkedListLength is not zero, and the number of nodes in the linked list containing the FirstEntry and SecondEntry nodes, including the FirstEntry and SecondEntry nodes, is greater than or equal to PcdMaximumLinkedListLength, then ASSERT().
| FirstEntry | A pointer to a node in a linked list. |
| SecondEntry | A pointer to another node in the same linked list. |
| VOID EFIAPI SwitchStack | ( | IN SWITCH_STACK_ENTRY_POINT | EntryPoint, |
| IN VOID * | Context1, | ||
| IN VOID * | Context2, | ||
| IN VOID * | NewStack, | ||
| ... | |||
| ) |
Transfers control to a function starting with a new stack.
Transfers control to the function specified by EntryPoint using the new stack specified by NewStack and passing in the parameters specified by Context1 and Context2. Context1 and Context2 are optional and may be NULL. The function EntryPoint must never return. This function supports a variable number of arguments following the NewStack parameter. These additional arguments are ignored on IA-32, x64, and EBC architectures. Itanium processors expect one additional parameter of type VOID * that specifies the new backing store pointer.
If EntryPoint is NULL, then ASSERT(). If NewStack is NULL, then ASSERT().
| EntryPoint | A pointer to function to call with the new stack. |
| Context1 | A pointer to the context to pass into the EntryPoint function. |
| Context2 | A pointer to the context to pass into the EntryPoint function. |
| NewStack | A pointer to the new stack to use for the EntryPoint function. |
| ... | This variable argument list is ignored for IA-32, x64, and EBC architectures. For Itanium processors, this variable argument list is expected to contain a single parameter of type VOID * that specifies the new backing store pointer. |
| RETURN_STATUS EFIAPI UnicodeStrnToAsciiStrS | ( | IN CONST CHAR16 * | Source, |
| IN UINTN | Length, | ||
| OUT CHAR8 * | Destination, | ||
| IN UINTN | DestMax, | ||
| OUT UINTN * | DestinationLength | ||
| ) |
Convert not more than Length successive characters from a Null-terminated Unicode string to a Null-terminated Ascii string. If no null char is copied from Source, then Destination[Length] is always set to null.
This function converts not more than Length successive characters from the Unicode string Source to the Ascii string Destination by copying the lower 8 bits of each Unicode character. The function terminates the Ascii string Destination by appending a Null-terminator character at the end.
The caller is responsible to make sure Destination points to a buffer with size equal or greater than ((StrLen (Source) + 1) * sizeof (CHAR8)) in bytes.
If any Unicode characters in Source contain non-zero value in the upper 8 bits, then ASSERT(). If Source is not aligned on a 16-bit boundary, then ASSERT().
If an error is returned, then the Destination is unmodified.
| Source | The pointer to a Null-terminated Unicode string. |
| Length | The maximum number of Unicode characters to convert. |
| Destination | The pointer to a Null-terminated Ascii string. |
| DestMax | The maximum number of Destination Ascii char, including terminating null char. |
| DestinationLength | The number of Unicode characters converted. |
| RETURN_SUCCESS | String is converted. |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If DestinationLength is NULL. If PcdMaximumAsciiStringLength is not zero, and Length or DestMax is greater than PcdMaximumAsciiStringLength. If PcdMaximumUnicodeStringLength is not zero, and Length or DestMax is greater than PcdMaximumUnicodeStringLength. If DestMax is 0. |
| RETURN_BUFFER_TOO_SMALL | If DestMax is NOT greater than MIN(StrLen(Source), Length). |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
| RETURN_STATUS EFIAPI UnicodeStrToAsciiStrS | ( | IN CONST CHAR16 * | Source, |
| OUT CHAR8 * | Destination, | ||
| IN UINTN | DestMax | ||
| ) |
Convert a Null-terminated Unicode string to a Null-terminated ASCII string.
This function is similar to AsciiStrCpyS.
This function converts the content of the Unicode string Source to the ASCII string Destination by copying the lower 8 bits of each Unicode character. The function terminates the ASCII string Destination by appending a Null-terminator character at the end.
The caller is responsible to make sure Destination points to a buffer with size equal or greater than ((StrLen (Source) + 1) * sizeof (CHAR8)) in bytes.
If any Unicode characters in Source contain non-zero value in the upper 8 bits, then ASSERT().
If Source is not aligned on a 16-bit boundary, then ASSERT().
If an error is returned, then the Destination is unmodified.
| Source | The pointer to a Null-terminated Unicode string. |
| Destination | The pointer to a Null-terminated ASCII string. |
| DestMax | The maximum number of Destination Ascii char, including terminating null char. |
| RETURN_SUCCESS | String is converted. |
| RETURN_BUFFER_TOO_SMALL | If DestMax is NOT greater than StrLen(Source). |
| RETURN_INVALID_PARAMETER | If Destination is NULL. If Source is NULL. If PcdMaximumAsciiStringLength is not zero, and DestMax is greater than PcdMaximumAsciiStringLength. If PcdMaximumUnicodeStringLength is not zero, and DestMax is greater than PcdMaximumUnicodeStringLength. If DestMax is 0. |
| RETURN_ACCESS_DENIED | If Source and Destination overlap. |
Writes a 16-bit value to memory that may be unaligned.
This function writes the 16-bit value specified by Value to Buffer. Value is returned. The function guarantees that the write operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
| Buffer | The pointer to a 16-bit value that may be unaligned. |
| Value | 16-bit value to write to Buffer. |
Writes a 24-bit value to memory that may be unaligned.
This function writes the 24-bit value specified by Value to Buffer. Value is returned. The function guarantees that the write operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
| Buffer | The pointer to a 24-bit value that may be unaligned. |
| Value | 24-bit value to write to Buffer. |
Writes a 32-bit value to memory that may be unaligned.
This function writes the 32-bit value specified by Value to Buffer. Value is returned. The function guarantees that the write operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
| Buffer | The pointer to a 32-bit value that may be unaligned. |
| Value | 32-bit value to write to Buffer. |
Writes a 64-bit value to memory that may be unaligned.
This function writes the 64-bit value specified by Value to Buffer. Value is returned. The function guarantees that the write operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
| Buffer | The pointer to a 64-bit value that may be unaligned. |
| Value | 64-bit value to write to Buffer. |
1.8.6 
