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/*
 *  Port on Texas Instruments TMS320C6x architecture
 *
 *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
 *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */
#ifndef _ASM_C6X_CMPXCHG_H
#define _ASM_C6X_CMPXCHG_H

#include <linux/irqflags.h>

/*
 * Misc. functions
 */
static inline unsigned int __xchg(unsigned int x, volatile void *ptr, int size)
{
	unsigned int tmp;
	unsigned long flags;

	local_irq_save(flags);

	switch (size) {
	case 1:
		tmp = 0;
		tmp = *((unsigned char *) ptr);
		*((unsigned char *) ptr) = (unsigned char) x;
		break;
	case 2:
		tmp = 0;
		tmp = *((unsigned short *) ptr);
		*((unsigned short *) ptr) = x;
		break;
	case 4:
		tmp = 0;
		tmp = *((unsigned int *) ptr);
		*((unsigned int *) ptr) = x;
		break;
	}
	local_irq_restore(flags);
	return tmp;
}

#define xchg(ptr, x) \
	((__typeof__(*(ptr)))__xchg((unsigned int)(x), (void *) (ptr), \
				    sizeof(*(ptr))))

#include <asm-generic/cmpxchg-local.h>

/*
 * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
 * them available.
 */
#define cmpxchg_local(ptr, o, n)					\
	((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr),		\
						     (unsigned long)(o), \
						     (unsigned long)(n), \
						     sizeof(*(ptr))))
#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))

#include <asm-generic/cmpxchg.h>

#endif /* _ASM_C6X_CMPXCHG_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 865 B 0644
asm-offsets.h File 35 B 0644
bitops.h File 2.17 KB 0644
bug.h File 705 B 0644
cache.h File 3.1 KB 0644
cacheflush.h File 2.05 KB 0644
checksum.h File 947 B 0644
clock.h File 3.51 KB 0644
cmpxchg.h File 1.57 KB 0644
delay.h File 1.67 KB 0644
dma-mapping.h File 911 B 0644
dscr.h File 909 B 0644
elf.h File 3.18 KB 0644
flat.h File 677 B 0644
ftrace.h File 97 B 0644
hardirq.h File 572 B 0644
irq.h File 1.59 KB 0644
irqflags.h File 1.67 KB 0644
linkage.h File 497 B 0644
megamod-pic.h File 213 B 0644
module.h File 639 B 0644
page.h File 312 B 0644
pgtable.h File 2.29 KB 0644
processor.h File 3.31 KB 0644
procinfo.h File 673 B 0644
ptrace.h File 998 B 0644
sections.h File 287 B 0644
setup.h File 914 B 0644
soc.h File 929 B 0644
special_insns.h File 1.82 KB 0644
string.h File 616 B 0644
switch_to.h File 992 B 0644
syscall.h File 2.2 KB 0644
syscalls.h File 1.73 KB 0644
thread_info.h File 2.63 KB 0644
timer64.h File 154 B 0644
timex.h File 867 B 0644
tlb.h File 192 B 0644
traps.h File 1.29 KB 0644
uaccess.h File 2.14 KB 0644
unaligned.h File 4.63 KB 0644