diff options
Diffstat (limited to 'MdePkg/Library/DxeMemoryLib/MemLibGeneric.c')
| -rw-r--r-- | MdePkg/Library/DxeMemoryLib/MemLibGeneric.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/MdePkg/Library/DxeMemoryLib/MemLibGeneric.c b/MdePkg/Library/DxeMemoryLib/MemLibGeneric.c new file mode 100644 index 0000000000..759377483c --- /dev/null +++ b/MdePkg/Library/DxeMemoryLib/MemLibGeneric.c @@ -0,0 +1,261 @@ +/** @file
+ Architecture Independent Base Memory Library Implementation.
+
+ Copyright (c) 2006, Intel Corporation<BR>
+ All rights reserved. This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ Module Name: MemLibGeneric.c
+
+ The following BaseMemoryLib instances share the same version of this file:
+
+ BaseMemoryLib
+ PeiMemoryLib
+ DxeMemoryLib
+
+**/
+
+#include "MemLibInternals.h"
+
+/**
+ Fills a target buffer with a 16-bit value, and returns the target buffer.
+
+ @param Buffer Pointer to the target buffer to fill.
+ @param Length Number of bytes in Buffer to fill.
+ @param Value Value with which to fill Length bytes of Buffer.
+
+ @return Buffer
+
+**/
+VOID *
+EFIAPI
+InternalMemSetMem16 (
+ OUT VOID *Buffer,
+ IN UINTN Length,
+ IN UINT16 Value
+ )
+{
+ do {
+ ((UINT16*)Buffer)[--Length] = Value;
+ } while (Length != 0);
+ return Buffer;
+}
+
+/**
+ Fills a target buffer with a 32-bit value, and returns the target buffer.
+
+ @param Buffer Pointer to the target buffer to fill.
+ @param Length Number of bytes in Buffer to fill.
+ @param Value Value with which to fill Length bytes of Buffer.
+
+ @return Buffer
+
+**/
+VOID *
+EFIAPI
+InternalMemSetMem32 (
+ OUT VOID *Buffer,
+ IN UINTN Length,
+ IN UINT32 Value
+ )
+{
+ do {
+ ((UINT32*)Buffer)[--Length] = Value;
+ } while (Length != 0);
+ return Buffer;
+}
+
+/**
+ Fills a target buffer with a 64-bit value, and returns the target buffer.
+
+ @param Buffer Pointer to the target buffer to fill.
+ @param Length Number of bytes in Buffer to fill.
+ @param Value Value with which to fill Length bytes of Buffer.
+
+ @return Buffer
+
+**/
+VOID *
+EFIAPI
+InternalMemSetMem64 (
+ OUT VOID *Buffer,
+ IN UINTN Length,
+ IN UINT64 Value
+ )
+{
+ do {
+ ((UINT64*)Buffer)[--Length] = Value;
+ } while (Length != 0);
+ return Buffer;
+}
+
+/**
+ Set Buffer to 0 for Size bytes.
+
+ @param Buffer Memory to set.
+ @param Size Number of bytes to set
+
+ @return Buffer
+
+**/
+VOID *
+EFIAPI
+InternalMemZeroMem (
+ OUT VOID *Buffer,
+ IN UINTN Length
+ )
+{
+ return InternalMemSetMem (Buffer, Length, 0);
+}
+
+/**
+ Compares two memory buffers of a given length.
+
+ @param DestinationBuffer First memory buffer
+ @param SourceBuffer Second memory buffer
+ @param Length Length of DestinationBuffer and SourceBuffer memory
+ regions to compare. Must be non-zero.
+
+ @retval 0 if MemOne == MemTwo
+
+**/
+INTN
+EFIAPI
+InternalMemCompareMem (
+ IN CONST VOID *DestinationBuffer,
+ IN CONST VOID *SourceBuffer,
+ IN UINTN Length
+ )
+{
+ while ((--Length != 0) &&
+ (*(INT8*)DestinationBuffer == *(INT8*)SourceBuffer)) {
+ DestinationBuffer = (INT8*)DestinationBuffer + 1;
+ SourceBuffer = (INT8*)SourceBuffer + 1;
+ }
+ return (INTN)*(UINT8*)DestinationBuffer - (INTN)*(UINT8*)SourceBuffer;
+}
+
+/**
+ Scans a target buffer for an 8-bit value, and returns a pointer to the
+ matching 8-bit value in the target buffer.
+
+ @param Buffer Pointer to the target buffer to scan.
+ @param Length Number of bytes in Buffer to scan. Must be non-zero.
+ @param Value Value to search for in the target buffer.
+
+ @return Pointer to the first occurrence or NULL if not found.
+
+**/
+CONST VOID *
+EFIAPI
+InternalMemScanMem8 (
+ IN CONST VOID *Buffer,
+ IN UINTN Length,
+ IN UINT8 Value
+ )
+{
+ CONST UINT8 *Pointer;
+
+ Pointer = (CONST UINT8*)Buffer;
+ do {
+ if (*(Pointer++) == Value) {
+ return Pointer;
+ }
+ } while (--Length != 0);
+ return NULL;
+}
+
+/**
+ Scans a target buffer for a 16-bit value, and returns a pointer to the
+ matching 16-bit value in the target buffer.
+
+ @param Buffer Pointer to the target buffer to scan.
+ @param Length Number of bytes in Buffer to scan. Must be non-zero.
+ @param Value Value to search for in the target buffer.
+
+ @return Pointer to the first occurrence or NULL if not found.
+
+**/
+CONST VOID *
+EFIAPI
+InternalMemScanMem16 (
+ IN CONST VOID *Buffer,
+ IN UINTN Length,
+ IN UINT16 Value
+ )
+{
+ CONST UINT16 *Pointer;
+
+ Pointer = (CONST UINT16*)Buffer;
+ do {
+ if (*(Pointer++) == Value) {
+ return Pointer;
+ }
+ } while (--Length != 0);
+ return NULL;
+}
+
+/**
+ Scans a target buffer for a 32-bit value, and returns a pointer to the
+ matching 32-bit value in the target buffer.
+
+ @param Buffer Pointer to the target buffer to scan.
+ @param Length Number of bytes in Buffer to scan. Must be non-zero.
+ @param Value Value to search for in the target buffer.
+
+ @return Pointer to the first occurrence or NULL if not found.
+
+**/
+CONST VOID *
+EFIAPI
+InternalMemScanMem32 (
+ IN CONST VOID *Buffer,
+ IN UINTN Length,
+ IN UINT32 Value
+ )
+{
+ CONST UINT32 *Pointer;
+
+ Pointer = (CONST UINT32*)Buffer;
+ do {
+ if (*(Pointer++) == Value) {
+ return Pointer;
+ }
+ } while (--Length != 0);
+ return NULL;
+}
+
+/**
+ Scans a target buffer for a 64-bit value, and returns a pointer to the
+ matching 64-bit value in the target buffer.
+
+ @param Buffer Pointer to the target buffer to scan.
+ @param Length Number of bytes in Buffer to scan. Must be non-zero.
+ @param Value Value to search for in the target buffer.
+
+ @return Pointer to the first occurrence or NULL if not found.
+
+**/
+CONST VOID *
+EFIAPI
+InternalMemScanMem64 (
+ IN CONST VOID *Buffer,
+ IN UINTN Length,
+ IN UINT64 Value
+ )
+{
+ CONST UINT64 *Pointer;
+
+ Pointer = (CONST UINT64*)Buffer;
+ do {
+ if (*(Pointer++) == Value) {
+ return Pointer;
+ }
+ } while (--Length != 0);
+ return NULL;
+}
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