/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * HISTORY
- *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef _OS_OSBYTEORDERI386_H
#define _OS_OSBYTEORDERI386_H
-#include <libkern/OSTypes.h>
-
-/* Functions for byte reversed loads. */
+#include <stdint.h>
-OS_INLINE
-UInt16
-OSReadSwapInt16(
- volatile void * base,
- UInt offset
-)
-{
- UInt16 result;
+#if !defined(OS_INLINE)
+# define OS_INLINE static inline
+#endif
- result = *(volatile UInt16 *)((UInt8 *)base + offset);
- __asm__ volatile("xchgb %b0,%h0"
- : "=q" (result)
- : "0" (result));
- return result;
-}
+/* Generic byte swapping functions. */
OS_INLINE
-UInt32
-OSReadSwapInt32(
- volatile void * base,
- UInt offset
+uint16_t
+_OSSwapInt16(
+ uint16_t data
)
{
- UInt32 result;
-
- result = *(volatile UInt32 *)((UInt8 *)base + offset);
- __asm__ volatile("bswap %0"
- : "=r" (result)
- : "0" (result));
- return result;
+ __asm__ ("xchgb %b0, %h0" : "+q" (data));
+ return data;
}
OS_INLINE
-UInt64
-OSReadSwapInt64(
- volatile void * base,
- UInt offset
+uint32_t
+_OSSwapInt32(
+ uint32_t data
)
{
- UInt64 * inp;
- union ullc {
- UInt64 ull;
- UInt ul[2];
- } outv;
-
- inp = (UInt64 *)base;
- outv.ul[0] = OSReadSwapInt32(inp, offset + 4);
- outv.ul[1] = OSReadSwapInt32(inp, offset);
- return outv.ull;
+ __asm__ ("bswap %0" : "+r" (data));
+ return data;
}
OS_INLINE
-UInt
-OSReadSwapInt(
- volatile void * base,
- UInt offset
+uint64_t
+_OSSwapInt64(
+ uint64_t data
)
{
- UInt result;
-
- result = *(volatile UInt *)((UInt8 *)base + offset);
- __asm__ volatile("bswap %0"
- : "=r" (result)
- : "0" (result));
- return result;
+ union {
+ uint64_t ull;
+ uint32_t ul[2];
+ } u;
+
+ /* This actually generates the best code */
+ u.ul[0] = data >> 32;
+ u.ul[1] = data & 0xffffffff;
+ u.ul[0] = _OSSwapInt32(u.ul[0]);
+ u.ul[1] = _OSSwapInt32(u.ul[1]);
+ return u.ull;
}
-/* Functions for byte reversed stores. */
+/* Functions for byte reversed loads. */
OS_INLINE
-void
-OSWriteSwapInt16(
- volatile void * base,
- UInt offset,
- UInt16 data
+uint16_t
+OSReadSwapInt16(
+ const volatile void * base,
+ uintptr_t offset
)
{
- __asm__ volatile("xchgb %b0,%h0"
- : "=q" (data)
- : "0" (data));
- *(volatile UInt16 *)((UInt8 *)base + offset) = data;
+ uint16_t result;
+
+ result = *(volatile uint16_t *)((uintptr_t)base + offset);
+ return _OSSwapInt16(result);
}
OS_INLINE
-void
-OSWriteSwapInt32(
- volatile void * base,
- UInt offset,
- UInt32 data
+uint32_t
+OSReadSwapInt32(
+ const volatile void * base,
+ uintptr_t offset
)
{
- __asm__ volatile("bswap %0"
- : "=r" (data)
- : "0" (data));
- *(volatile UInt32 *)((UInt8 *)base + offset) = data;
+ uint32_t result;
+
+ result = *(volatile uint32_t *)((uintptr_t)base + offset);
+ return _OSSwapInt32(result);
}
OS_INLINE
-void
-OSWriteSwapInt64(
- volatile void * base,
- UInt offset,
- UInt64 data
+uint64_t
+OSReadSwapInt64(
+ const volatile void * base,
+ uintptr_t offset
)
{
- UInt64 * outp;
+ const volatile uint32_t * inp;
union ullc {
- UInt64 ull;
- UInt ul[2];
- } *inp;
-
- outp = (UInt64 *)base;
- inp = (union ullc *)&data;
- OSWriteSwapInt32(outp, offset, inp->ul[1]);
- OSWriteSwapInt32(outp, offset + 4, inp->ul[0]);
-}
+ uint64_t ull;
+ uint32_t ul[2];
+ } outv;
-OS_INLINE
-void
-OSWriteSwapInt(
- volatile void * base,
- UInt offset,
- UInt data
-)
-{
- __asm__ volatile("bswap %0"
- : "=r" (data)
- : "0" (data));
- *(volatile UInt *)((UInt8 *)base + offset) = data;
+ inp = (const volatile uint32_t *)((uintptr_t)base + offset);
+ outv.ul[0] = inp[1];
+ outv.ul[1] = inp[0];
+ outv.ul[0] = _OSSwapInt32(outv.ul[0]);
+ outv.ul[1] = _OSSwapInt32(outv.ul[1]);
+ return outv.ull;
}
-/* Generic byte swapping functions. */
-
-OS_INLINE
-UInt16
-OSSwapInt16(
- UInt16 data
-)
-{
- UInt16 temp = data;
- return OSReadSwapInt16(&temp, 0);
-}
+/* Functions for byte reversed stores. */
OS_INLINE
-UInt32
-OSSwapInt32(
- UInt32 data
+void
+OSWriteSwapInt16(
+ volatile void * base,
+ uintptr_t offset,
+ uint16_t data
)
{
- UInt32 temp = data;
- return OSReadSwapInt32(&temp, 0);
+ *(volatile uint16_t *)((uintptr_t)base + offset) = _OSSwapInt16(data);
}
OS_INLINE
-UInt64
-OSSwapInt64(
- UInt64 data
+void
+OSWriteSwapInt32(
+ volatile void * base,
+ uintptr_t offset,
+ uint32_t data
)
{
- UInt64 temp = data;
- return OSReadSwapInt64(&temp, 0);
+ *(volatile uint32_t *)((uintptr_t)base + offset) = _OSSwapInt32(data);
}
OS_INLINE
-UInt
-OSSwapInt(
- UInt data
+void
+OSWriteSwapInt64(
+ volatile void * base,
+ uintptr_t offset,
+ uint64_t data
)
{
- UInt temp = data;
- return OSReadSwapInt(&temp, 0);
+ *(volatile uint64_t *)((uintptr_t)base + offset) = _OSSwapInt64(data);
}
#endif /* ! _OS_OSBYTEORDERI386_H */
projects / apple / xnu.git / blobdiff