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/*
* Copyright (c) 1999-2023 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef _OS_OSBYTEORDERARM_H
#define _OS_OSBYTEORDERARM_H
#if defined (__arm__) || defined(__arm64__)
#include <stdint.h>
#include <libkern/arm/_OSByteOrder.h>
#include <sys/_types/_os_inline.h>
#include <arm/arch.h> /* for _ARM_ARCH_6 */
/* Functions for byte reversed loads. */
struct _OSUnalignedU16 {
volatile uint16_t __val;
} __attribute__((__packed__));
struct _OSUnalignedU32 {
volatile uint32_t __val;
} __attribute__((__packed__));
struct _OSUnalignedU64 {
volatile uint64_t __val;
} __attribute__((__packed__));
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
OS_INLINE
uint16_t
_OSReadSwapInt16(
const volatile void * _base,
uintptr_t _offset
)
{
return _OSSwapInt16(((struct _OSUnalignedU16 *)((uintptr_t)_base + _offset))->__val);
}
#else
OS_INLINE
uint16_t
OSReadSwapInt16(
const volatile void * _base,
uintptr_t _offset
)
{
return _OSSwapInt16(((struct _OSUnalignedU16 *)((uintptr_t)_base + _offset))->__val);
}
#endif
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
OS_INLINE
uint32_t
_OSReadSwapInt32(
const volatile void * _base,
uintptr_t _offset
)
{
return _OSSwapInt32(((struct _OSUnalignedU32 *)((uintptr_t)_base + _offset))->__val);
}
#else
OS_INLINE
uint32_t
OSReadSwapInt32(
const volatile void * _base,
uintptr_t _offset
)
{
return _OSSwapInt32(((struct _OSUnalignedU32 *)((uintptr_t)_base + _offset))->__val);
}
#endif
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
OS_INLINE
uint64_t
_OSReadSwapInt64(
const volatile void * _base,
uintptr_t _offset
)
{
return _OSSwapInt64(((struct _OSUnalignedU64 *)((uintptr_t)_base + _offset))->__val);
}
#else
OS_INLINE
uint64_t
OSReadSwapInt64(
const volatile void * _base,
uintptr_t _offset
)
{
return _OSSwapInt64(((struct _OSUnalignedU64 *)((uintptr_t)_base + _offset))->__val);
}
#endif
/* Functions for byte reversed stores. */
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
OS_INLINE
void
_OSWriteSwapInt16(
volatile void * _base,
uintptr_t _offset,
uint16_t _data
)
{
((struct _OSUnalignedU16 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt16(_data);
}
#else
OS_INLINE
void
OSWriteSwapInt16(
volatile void * _base,
uintptr_t _offset,
uint16_t _data
)
{
((struct _OSUnalignedU16 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt16(_data);
}
#endif
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
OS_INLINE
void
_OSWriteSwapInt32(
volatile void * _base,
uintptr_t _offset,
uint32_t _data
)
{
((struct _OSUnalignedU32 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt32(_data);
}
#else
OS_INLINE
void
OSWriteSwapInt32(
volatile void * _base,
uintptr_t _offset,
uint32_t _data
)
{
((struct _OSUnalignedU32 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt32(_data);
}
#endif
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
OS_INLINE
void
_OSWriteSwapInt64(
volatile void * _base,
uintptr_t _offset,
uint64_t _data
)
{
((struct _OSUnalignedU64 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt64(_data);
}
#else
OS_INLINE
void
OSWriteSwapInt64(
volatile void * _base,
uintptr_t _offset,
uint64_t _data
)
{
((struct _OSUnalignedU64 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt64(_data);
}
#endif
#endif /* defined (__arm__) || defined(__arm64__) */
#endif /* ! _OS_OSBYTEORDERARM_H */
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