+++ /dev/null
-/** @file\r
- Unaligned access functions of BaseLib for IPF.\r
-\r
- Copyright (c) 2006, Intel Corporation<BR>\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
- Module Name: Unaligned.c\r
-\r
-**/\r
-\r
-/**\r
- Reads a 16-bit value from memory that may be unaligned.\r
-\r
- This function returns the 16-bit value pointed to by Buffer. The function\r
- guarantees that the read operation does not produce an alignment fault.\r
-\r
- If the Buffer is NULL, then ASSERT().\r
-\r
- @param Buffer Pointer to a 16-bit value that may be unaligned.\r
-\r
- @return *Uint16\r
-\r
-**/\r
-UINT16\r
-EFIAPI\r
-ReadUnaligned16 (\r
- IN CONST UINT16 *Buffer\r
- )\r
-{\r
- ASSERT (Buffer != NULL);\r
-\r
- return (UINT16)(((UINT8*)Buffer)[0] | (((UINT8*)Buffer)[1] << 8));\r
-}\r
-\r
-/**\r
- Writes a 16-bit value to memory that may be unaligned.\r
-\r
- This function writes the 16-bit value specified by Value to Buffer. Value is\r
- returned. The function guarantees that the write operation does not produce\r
- an alignment fault.\r
-\r
- If the Buffer is NULL, then ASSERT().\r
-\r
- @param Buffer Pointer to a 16-bit value that may be unaligned.\r
- @param Value 16-bit value to write to Buffer.\r
-\r
- @return Value\r
-\r
-**/\r
-UINT16\r
-EFIAPI\r
-WriteUnaligned16 (\r
- OUT UINT16 *Buffer,\r
- IN UINT16 Value\r
- )\r
-{\r
- ASSERT (Buffer != NULL);\r
-\r
- ((UINT8*)Buffer)[0] = (UINT8)Value;\r
- ((UINT8*)Buffer)[1] = (UINT8)(Value >> 8);\r
-\r
- return Value;\r
-}\r
-\r
-/**\r
- Reads a 24-bit value from memory that may be unaligned.\r
-\r
- This function returns the 24-bit value pointed to by Buffer. The function\r
- guarantees that the read operation does not produce an alignment fault.\r
-\r
- If the Buffer is NULL, then ASSERT().\r
-\r
- @param Buffer Pointer to a 24-bit value that may be unaligned.\r
-\r
- @return The value read.\r
-\r
-**/\r
-UINT32\r
-EFIAPI\r
-ReadUnaligned24 (\r
- IN CONST UINT32 *Buffer\r
- )\r
-{\r
- ASSERT (Buffer != NULL);\r
-\r
- return (UINT32)(\r
- ReadUnaligned16 ((UINT16*)Buffer) |\r
- (((UINT8*)Buffer)[2] << 16)\r
- );\r
-}\r
-\r
-/**\r
- Writes a 24-bit value to memory that may be unaligned.\r
-\r
- This function writes the 24-bit value specified by Value to Buffer. Value is\r
- returned. The function guarantees that the write operation does not produce\r
- an alignment fault.\r
-\r
- If the Buffer is NULL, then ASSERT().\r
-\r
- @param Buffer Pointer to a 24-bit value that may be unaligned.\r
- @param Value 24-bit value to write to Buffer.\r
-\r
- @return The value written.\r
-\r
-**/\r
-UINT32\r
-EFIAPI\r
-WriteUnaligned24 (\r
- OUT UINT32 *Buffer,\r
- IN UINT32 Value\r
- )\r
-{\r
- ASSERT (Buffer != NULL);\r
-\r
- WriteUnaligned16 ((UINT16*)Buffer, (UINT16)Value);\r
- *(UINT8*)((UINT16*)Buffer + 1) = (UINT8)(Value >> 16);\r
- return Value;\r
-}\r
-\r
-/**\r
- Reads a 32-bit value from memory that may be unaligned.\r
-\r
- This function returns the 32-bit value pointed to by Buffer. The function\r
- guarantees that the read operation does not produce an alignment fault.\r
-\r
- If the Buffer is NULL, then ASSERT().\r
-\r
- @param Buffer Pointer to a 32-bit value that may be unaligned.\r
-\r
- @return *Uint32\r
-\r
-**/\r
-UINT32\r
-EFIAPI\r
-ReadUnaligned32 (\r
- IN CONST UINT32 *Buffer\r
- )\r
-{\r
- UINT16 LowerBytes;\r
- UINT16 HigherBytes;\r
-\r
- ASSERT (Buffer != NULL);\r
-\r
- LowerBytes = ReadUnaligned16 ((UINT16*) Buffer);\r
- HigherBytes = ReadUnaligned16 ((UINT16*) Buffer + 1);\r
-\r
- return (UINT32) (LowerBytes | (HigherBytes << 16));\r
-}\r
-\r
-/**\r
- Writes a 32-bit value to memory that may be unaligned.\r
-\r
- This function writes the 32-bit value specified by Value to Buffer. Value is\r
- returned. The function guarantees that the write operation does not produce\r
- an alignment fault.\r
-\r
- If the Buffer is NULL, then ASSERT().\r
-\r
- @param Buffer Pointer to a 32-bit value that may be unaligned.\r
- @param Value 32-bit value to write to Buffer.\r
-\r
- @return Value\r
-\r
-**/\r
-UINT32\r
-EFIAPI\r
-WriteUnaligned32 (\r
- OUT UINT32 *Buffer,\r
- IN UINT32 Value\r
- )\r
-{\r
- ASSERT (Buffer != NULL);\r
-\r
- WriteUnaligned16 ((UINT16*)Buffer, (UINT16)Value);\r
- WriteUnaligned16 ((UINT16*)Buffer + 1, (UINT16)(Value >> 16));\r
- return Value;\r
-}\r
-\r
-/**\r
- Reads a 64-bit value from memory that may be unaligned.\r
-\r
- This function returns the 64-bit value pointed to by Buffer. The function\r
- guarantees that the read operation does not produce an alignment fault.\r
-\r
- If the Buffer is NULL, then ASSERT().\r
-\r
- @param Buffer Pointer to a 64-bit value that may be unaligned.\r
-\r
- @return *Uint64\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-ReadUnaligned64 (\r
- IN CONST UINT64 *Buffer\r
- )\r
-{\r
- UINT32 LowerBytes;\r
- UINT32 HigherBytes;\r
-\r
- ASSERT (Buffer != NULL);\r
-\r
- LowerBytes = ReadUnaligned32 ((UINT32*) Buffer);\r
- HigherBytes = ReadUnaligned32 ((UINT32*) Buffer + 1);\r
-\r
- return (UINT64) (LowerBytes | LShiftU64 (HigherBytes, 32));\r
-}\r
-\r
-/**\r
- Writes a 64-bit value to memory that may be unaligned.\r
-\r
- This function writes the 64-bit value specified by Value to Buffer. Value is\r
- returned. The function guarantees that the write operation does not produce\r
- an alignment fault.\r
-\r
- If the Buffer is NULL, then ASSERT().\r
-\r
- @param Buffer Pointer to a 64-bit value that may be unaligned.\r
- @param Value 64-bit value to write to Buffer.\r
-\r
- @return Value\r
-\r
-**/\r
-UINT64\r
-EFIAPI\r
-WriteUnaligned64 (\r
- OUT UINT64 *Buffer,\r
- IN UINT64 Value\r
- )\r
-{\r
- ASSERT (Buffer != NULL);\r
-\r
- WriteUnaligned32 ((UINT32*)Buffer, (UINT32)Value);\r
- WriteUnaligned32 ((UINT32*)Buffer + 1, (UINT32)RShiftU64 (Value, 32));\r
- return Value;\r
-}\r