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Add generic <machine/_align.h> for RTEMS 

It uses __BIGGEST_ALIGNMENT__ which is available in recent GCC and
LLVM/clang.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This commit is contained in:
Sebastian Huber 2017-05-19 11:16:11 +02:00 committed by Jeff Johnston
parent 9b1167219a
commit 15b59a15b4
2 changed files with 42 additions and 11 deletions
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38
newlib/libc/sys/rtems/include/machine/_align.h Normal file
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@ -0,0 +1,38 @@
/*-
* Copyright (c) 2017 embedded brains GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _MACHINE__ALIGN_H_
#define _MACHINE__ALIGN_H_
#ifdef __BIGGEST_ALIGNMENT__
#define _ALIGNBYTES (__BIGGEST_ALIGNMENT__ - 1UL)
#else
#define _ALIGNBYTES (sizeof(long long) - 1UL)
#endif
#define _ALIGN(_p) (((unsigned long)(_p) + _ALIGNBYTES) & ~_ALIGNBYTES)
#endif /* !_MACHINE__ALIGN_H_ */

15
newlib/libc/sys/rtems/include/machine/param.h
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@ -14,17 +14,10 @@
#define MID_MACHINE MID_I386
*/
/*
* Round p (pointer or byte index) up to a correctly-aligned value
* for all data types (int, long, ...). The result is unsigned int
* and must be cast to any desired pointer type.
*/
#if defined(__sparc__)
#define ALIGNBYTES (sizeof(double) - 1)
#else
#define ALIGNBYTES (sizeof(int) - 1)
#endif
#define ALIGN(p) (((unsigned)(p) + ALIGNBYTES) & ~ALIGNBYTES)
#include <machine/_align.h>
#define ALIGNBYTES _ALIGNBYTES
#define ALIGN(p) _ALIGN(p)
#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */