262 lines
6.3 KiB
C
262 lines
6.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
|
|
/*
|
|
* Copyright (c) Meta Platforms, Inc. and affiliates.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under both the BSD-style license (found in the
|
|
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
|
|
* in the COPYING file in the root directory of this source tree).
|
|
* You may select, at your option, one of the above-listed licenses.
|
|
*/
|
|
|
|
#ifndef MEM_H_MODULE
|
|
#define MEM_H_MODULE
|
|
|
|
/*-****************************************
|
|
* Dependencies
|
|
******************************************/
|
|
#include <asm/unaligned.h> /* get_unaligned, put_unaligned* */
|
|
#include <linux/compiler.h> /* inline */
|
|
#include <linux/swab.h> /* swab32, swab64 */
|
|
#include <linux/types.h> /* size_t, ptrdiff_t */
|
|
#include "debug.h" /* DEBUG_STATIC_ASSERT */
|
|
|
|
/*-****************************************
|
|
* Compiler specifics
|
|
******************************************/
|
|
#define MEM_STATIC static inline
|
|
|
|
/*-**************************************************************
|
|
* Basic Types
|
|
*****************************************************************/
|
|
typedef uint8_t BYTE;
|
|
typedef uint8_t U8;
|
|
typedef int8_t S8;
|
|
typedef uint16_t U16;
|
|
typedef int16_t S16;
|
|
typedef uint32_t U32;
|
|
typedef int32_t S32;
|
|
typedef uint64_t U64;
|
|
typedef int64_t S64;
|
|
|
|
/*-**************************************************************
|
|
* Memory I/O API
|
|
*****************************************************************/
|
|
/*=== Static platform detection ===*/
|
|
MEM_STATIC unsigned MEM_32bits(void);
|
|
MEM_STATIC unsigned MEM_64bits(void);
|
|
MEM_STATIC unsigned MEM_isLittleEndian(void);
|
|
|
|
/*=== Native unaligned read/write ===*/
|
|
MEM_STATIC U16 MEM_read16(const void* memPtr);
|
|
MEM_STATIC U32 MEM_read32(const void* memPtr);
|
|
MEM_STATIC U64 MEM_read64(const void* memPtr);
|
|
MEM_STATIC size_t MEM_readST(const void* memPtr);
|
|
|
|
MEM_STATIC void MEM_write16(void* memPtr, U16 value);
|
|
MEM_STATIC void MEM_write32(void* memPtr, U32 value);
|
|
MEM_STATIC void MEM_write64(void* memPtr, U64 value);
|
|
|
|
/*=== Little endian unaligned read/write ===*/
|
|
MEM_STATIC U16 MEM_readLE16(const void* memPtr);
|
|
MEM_STATIC U32 MEM_readLE24(const void* memPtr);
|
|
MEM_STATIC U32 MEM_readLE32(const void* memPtr);
|
|
MEM_STATIC U64 MEM_readLE64(const void* memPtr);
|
|
MEM_STATIC size_t MEM_readLEST(const void* memPtr);
|
|
|
|
MEM_STATIC void MEM_writeLE16(void* memPtr, U16 val);
|
|
MEM_STATIC void MEM_writeLE24(void* memPtr, U32 val);
|
|
MEM_STATIC void MEM_writeLE32(void* memPtr, U32 val32);
|
|
MEM_STATIC void MEM_writeLE64(void* memPtr, U64 val64);
|
|
MEM_STATIC void MEM_writeLEST(void* memPtr, size_t val);
|
|
|
|
/*=== Big endian unaligned read/write ===*/
|
|
MEM_STATIC U32 MEM_readBE32(const void* memPtr);
|
|
MEM_STATIC U64 MEM_readBE64(const void* memPtr);
|
|
MEM_STATIC size_t MEM_readBEST(const void* memPtr);
|
|
|
|
MEM_STATIC void MEM_writeBE32(void* memPtr, U32 val32);
|
|
MEM_STATIC void MEM_writeBE64(void* memPtr, U64 val64);
|
|
MEM_STATIC void MEM_writeBEST(void* memPtr, size_t val);
|
|
|
|
/*=== Byteswap ===*/
|
|
MEM_STATIC U32 MEM_swap32(U32 in);
|
|
MEM_STATIC U64 MEM_swap64(U64 in);
|
|
MEM_STATIC size_t MEM_swapST(size_t in);
|
|
|
|
/*-**************************************************************
|
|
* Memory I/O Implementation
|
|
*****************************************************************/
|
|
MEM_STATIC unsigned MEM_32bits(void)
|
|
{
|
|
return sizeof(size_t) == 4;
|
|
}
|
|
|
|
MEM_STATIC unsigned MEM_64bits(void)
|
|
{
|
|
return sizeof(size_t) == 8;
|
|
}
|
|
|
|
#if defined(__LITTLE_ENDIAN)
|
|
#define MEM_LITTLE_ENDIAN 1
|
|
#else
|
|
#define MEM_LITTLE_ENDIAN 0
|
|
#endif
|
|
|
|
MEM_STATIC unsigned MEM_isLittleEndian(void)
|
|
{
|
|
return MEM_LITTLE_ENDIAN;
|
|
}
|
|
|
|
MEM_STATIC U16 MEM_read16(const void *memPtr)
|
|
{
|
|
return get_unaligned((const U16 *)memPtr);
|
|
}
|
|
|
|
MEM_STATIC U32 MEM_read32(const void *memPtr)
|
|
{
|
|
return get_unaligned((const U32 *)memPtr);
|
|
}
|
|
|
|
MEM_STATIC U64 MEM_read64(const void *memPtr)
|
|
{
|
|
return get_unaligned((const U64 *)memPtr);
|
|
}
|
|
|
|
MEM_STATIC size_t MEM_readST(const void *memPtr)
|
|
{
|
|
return get_unaligned((const size_t *)memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_write16(void *memPtr, U16 value)
|
|
{
|
|
put_unaligned(value, (U16 *)memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_write32(void *memPtr, U32 value)
|
|
{
|
|
put_unaligned(value, (U32 *)memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_write64(void *memPtr, U64 value)
|
|
{
|
|
put_unaligned(value, (U64 *)memPtr);
|
|
}
|
|
|
|
/*=== Little endian r/w ===*/
|
|
|
|
MEM_STATIC U16 MEM_readLE16(const void *memPtr)
|
|
{
|
|
return get_unaligned_le16(memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_writeLE16(void *memPtr, U16 val)
|
|
{
|
|
put_unaligned_le16(val, memPtr);
|
|
}
|
|
|
|
MEM_STATIC U32 MEM_readLE24(const void *memPtr)
|
|
{
|
|
return MEM_readLE16(memPtr) + (((const BYTE *)memPtr)[2] << 16);
|
|
}
|
|
|
|
MEM_STATIC void MEM_writeLE24(void *memPtr, U32 val)
|
|
{
|
|
MEM_writeLE16(memPtr, (U16)val);
|
|
((BYTE *)memPtr)[2] = (BYTE)(val >> 16);
|
|
}
|
|
|
|
MEM_STATIC U32 MEM_readLE32(const void *memPtr)
|
|
{
|
|
return get_unaligned_le32(memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_writeLE32(void *memPtr, U32 val32)
|
|
{
|
|
put_unaligned_le32(val32, memPtr);
|
|
}
|
|
|
|
MEM_STATIC U64 MEM_readLE64(const void *memPtr)
|
|
{
|
|
return get_unaligned_le64(memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_writeLE64(void *memPtr, U64 val64)
|
|
{
|
|
put_unaligned_le64(val64, memPtr);
|
|
}
|
|
|
|
MEM_STATIC size_t MEM_readLEST(const void *memPtr)
|
|
{
|
|
if (MEM_32bits())
|
|
return (size_t)MEM_readLE32(memPtr);
|
|
else
|
|
return (size_t)MEM_readLE64(memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_writeLEST(void *memPtr, size_t val)
|
|
{
|
|
if (MEM_32bits())
|
|
MEM_writeLE32(memPtr, (U32)val);
|
|
else
|
|
MEM_writeLE64(memPtr, (U64)val);
|
|
}
|
|
|
|
/*=== Big endian r/w ===*/
|
|
|
|
MEM_STATIC U32 MEM_readBE32(const void *memPtr)
|
|
{
|
|
return get_unaligned_be32(memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_writeBE32(void *memPtr, U32 val32)
|
|
{
|
|
put_unaligned_be32(val32, memPtr);
|
|
}
|
|
|
|
MEM_STATIC U64 MEM_readBE64(const void *memPtr)
|
|
{
|
|
return get_unaligned_be64(memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_writeBE64(void *memPtr, U64 val64)
|
|
{
|
|
put_unaligned_be64(val64, memPtr);
|
|
}
|
|
|
|
MEM_STATIC size_t MEM_readBEST(const void *memPtr)
|
|
{
|
|
if (MEM_32bits())
|
|
return (size_t)MEM_readBE32(memPtr);
|
|
else
|
|
return (size_t)MEM_readBE64(memPtr);
|
|
}
|
|
|
|
MEM_STATIC void MEM_writeBEST(void *memPtr, size_t val)
|
|
{
|
|
if (MEM_32bits())
|
|
MEM_writeBE32(memPtr, (U32)val);
|
|
else
|
|
MEM_writeBE64(memPtr, (U64)val);
|
|
}
|
|
|
|
MEM_STATIC U32 MEM_swap32(U32 in)
|
|
{
|
|
return swab32(in);
|
|
}
|
|
|
|
MEM_STATIC U64 MEM_swap64(U64 in)
|
|
{
|
|
return swab64(in);
|
|
}
|
|
|
|
MEM_STATIC size_t MEM_swapST(size_t in)
|
|
{
|
|
if (MEM_32bits())
|
|
return (size_t)MEM_swap32((U32)in);
|
|
else
|
|
return (size_t)MEM_swap64((U64)in);
|
|
}
|
|
|
|
#endif /* MEM_H_MODULE */
|