1fef058f4b
1. Remove .intel_syntax directives in GCC assembly files. All these assembly files have been updated to use the preferred syntax for GAS 2. Correct the incorrect comments for internal worker functions for SetMemXX() and ScanMemXX(). The Length parameter is actually the counter of 16-bit, 32-bit or 64-bit value. 3. Simplify the logic in ZeroMemoryWrapper.c for BaseMemoryLibOptPei instance to remove the conditional statement for zero length. This logic is already covered by worker function InternalMemZeroMem(). 4. Cleanup all the Wrapper C files in BaseMemoryLib instances. They are supposed to be shared by all these 8 BaseMemoryLib instances, but are out-of-sync after some maintenance. This patch re-syncs them and makes them exactly the same. 5. Cleanup MemLibInternal.h so that it is shared by 6 BaseMemoryLib instance except for PeiMemoryLib and UefiMemoryLib. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9041 6f19259b-4bc3-4df7-8a09-765794883524
261 lines
6.8 KiB
C
261 lines
6.8 KiB
C
/** @file
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Architecture Independent Base Memory Library Implementation.
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The following BaseMemoryLib instances contain the same copy of this file:
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BaseMemoryLib
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PeiMemoryLib
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UefiMemoryLib
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Copyright (c) 2006 - 2009, Intel Corporation<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "MemLibInternals.h"
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/**
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Fills a target buffer with a 16-bit value, and returns the target buffer.
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@param Buffer Pointer to the target buffer to fill.
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@param Length Count of 16-bit value to fill.
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@param Value Value with which to fill Length bytes of Buffer.
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@return Buffer
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**/
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VOID *
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EFIAPI
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InternalMemSetMem16 (
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OUT VOID *Buffer,
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IN UINTN Length,
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IN UINT16 Value
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)
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{
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do {
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((UINT16*)Buffer)[--Length] = Value;
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} while (Length != 0);
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return Buffer;
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}
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/**
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Fills a target buffer with a 32-bit value, and returns the target buffer.
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@param Buffer Pointer to the target buffer to fill.
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@param Length Count of 32-bit value to fill.
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@param Value Value with which to fill Length bytes of Buffer.
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@return Buffer
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**/
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VOID *
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EFIAPI
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InternalMemSetMem32 (
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OUT VOID *Buffer,
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IN UINTN Length,
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IN UINT32 Value
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)
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{
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do {
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((UINT32*)Buffer)[--Length] = Value;
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} while (Length != 0);
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return Buffer;
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}
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/**
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Fills a target buffer with a 64-bit value, and returns the target buffer.
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@param Buffer Pointer to the target buffer to fill.
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@param Length Count of 64-bit value to fill.
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@param Value Value with which to fill Length bytes of Buffer.
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@return Buffer
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**/
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VOID *
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EFIAPI
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InternalMemSetMem64 (
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OUT VOID *Buffer,
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IN UINTN Length,
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IN UINT64 Value
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)
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{
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do {
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((UINT64*)Buffer)[--Length] = Value;
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} while (Length != 0);
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return Buffer;
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}
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/**
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Set Buffer to 0 for Size bytes.
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@param Buffer Memory to set.
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@param Length Number of bytes to set
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@return Buffer
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**/
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VOID *
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EFIAPI
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InternalMemZeroMem (
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OUT VOID *Buffer,
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IN UINTN Length
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)
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{
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return InternalMemSetMem (Buffer, Length, 0);
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}
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/**
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Compares two memory buffers of a given length.
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@param DestinationBuffer First memory buffer
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@param SourceBuffer Second memory buffer
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@param Length Length of DestinationBuffer and SourceBuffer memory
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regions to compare. Must be non-zero.
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@return 0 All Length bytes of the two buffers are identical.
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@retval Non-zero The first mismatched byte in SourceBuffer subtracted from the first
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mismatched byte in DestinationBuffer.
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**/
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INTN
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EFIAPI
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InternalMemCompareMem (
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IN CONST VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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)
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{
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while ((--Length != 0) &&
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(*(INT8*)DestinationBuffer == *(INT8*)SourceBuffer)) {
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DestinationBuffer = (INT8*)DestinationBuffer + 1;
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SourceBuffer = (INT8*)SourceBuffer + 1;
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}
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return (INTN)*(UINT8*)DestinationBuffer - (INTN)*(UINT8*)SourceBuffer;
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}
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/**
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Scans a target buffer for an 8-bit value, and returns a pointer to the
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matching 8-bit value in the target buffer.
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@param Buffer Pointer to the target buffer to scan.
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@param Length Count of 8-bit value to scan. Must be non-zero.
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@param Value Value to search for in the target buffer.
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@return Pointer to the first occurrence or NULL if not found.
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**/
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CONST VOID *
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EFIAPI
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InternalMemScanMem8 (
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IN CONST VOID *Buffer,
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IN UINTN Length,
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IN UINT8 Value
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)
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{
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CONST UINT8 *Pointer;
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Pointer = (CONST UINT8*)Buffer;
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do {
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if (*(Pointer++) == Value) {
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return Pointer;
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}
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} while (--Length != 0);
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return NULL;
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}
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/**
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Scans a target buffer for a 16-bit value, and returns a pointer to the
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matching 16-bit value in the target buffer.
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@param Buffer Pointer to the target buffer to scan.
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@param Length Count of 16-bit value to scan. Must be non-zero.
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@param Value Value to search for in the target buffer.
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@return Pointer to the first occurrence or NULL if not found.
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**/
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CONST VOID *
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EFIAPI
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InternalMemScanMem16 (
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IN CONST VOID *Buffer,
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IN UINTN Length,
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IN UINT16 Value
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)
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{
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CONST UINT16 *Pointer;
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Pointer = (CONST UINT16*)Buffer;
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do {
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if (*(Pointer++) == Value) {
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return Pointer;
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}
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} while (--Length != 0);
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return NULL;
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}
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/**
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Scans a target buffer for a 32-bit value, and returns a pointer to the
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matching 32-bit value in the target buffer.
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@param Buffer Pointer to the target buffer to scan.
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@param Length Count of 32-bit value to scan. Must be non-zero.
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@param Value Value to search for in the target buffer.
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@return Pointer to the first occurrence or NULL if not found.
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**/
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CONST VOID *
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EFIAPI
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InternalMemScanMem32 (
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IN CONST VOID *Buffer,
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IN UINTN Length,
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IN UINT32 Value
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)
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{
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CONST UINT32 *Pointer;
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Pointer = (CONST UINT32*)Buffer;
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do {
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if (*(Pointer++) == Value) {
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return Pointer;
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}
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} while (--Length != 0);
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return NULL;
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}
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/**
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Scans a target buffer for a 64-bit value, and returns a pointer to the
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matching 64-bit value in the target buffer.
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@param Buffer Pointer to the target buffer to scan.
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@param Length Count of 64-bit value to scan. Must be non-zero.
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@param Value Value to search for in the target buffer.
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@return Pointer to the first occurrence or NULL if not found.
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**/
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CONST VOID *
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EFIAPI
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InternalMemScanMem64 (
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IN CONST VOID *Buffer,
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IN UINTN Length,
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IN UINT64 Value
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)
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{
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CONST UINT64 *Pointer;
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Pointer = (CONST UINT64*)Buffer;
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do {
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if (*(Pointer++) == Value) {
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return Pointer;
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}
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} while (--Length != 0);
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return NULL;
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}
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