diff options
author | David Howells <dhowells@redhat.com> | 2012-03-28 17:30:02 (GMT) |
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committer | David Howells <dhowells@redhat.com> | 2012-03-28 17:30:02 (GMT) |
commit | c40d04df152a1111c5bbcb632278394dabd2b73d (patch) | |
tree | 84e9426bea45852e2333308116a69b5743655ee3 /arch/microblaze/include/asm/cmpxchg.h | |
parent | 803f69144f0d48863c68f9d111b56849c7cef5bb (diff) | |
download | linux-fsl-qoriq-c40d04df152a1111c5bbcb632278394dabd2b73d.tar.xz |
Disintegrate asm/system.h for Microblaze
Disintegrate asm/system.h for Microblaze. Not compiled.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: microblaze-uclinux@itee.uq.edu.au
Diffstat (limited to 'arch/microblaze/include/asm/cmpxchg.h')
-rw-r--r-- | arch/microblaze/include/asm/cmpxchg.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/cmpxchg.h b/arch/microblaze/include/asm/cmpxchg.h new file mode 100644 index 0000000..0094859a --- /dev/null +++ b/arch/microblaze/include/asm/cmpxchg.h @@ -0,0 +1,40 @@ +#ifndef _ASM_MICROBLAZE_CMPXCHG_H +#define _ASM_MICROBLAZE_CMPXCHG_H + +void __bad_xchg(volatile void *ptr, int size); + +static inline unsigned long __xchg(unsigned long x, volatile void *ptr, + int size) +{ + unsigned long ret; + unsigned long flags; + + switch (size) { + case 1: + local_irq_save(flags); + ret = *(volatile unsigned char *)ptr; + *(volatile unsigned char *)ptr = x; + local_irq_restore(flags); + break; + + case 4: + local_irq_save(flags); + ret = *(volatile unsigned long *)ptr; + *(volatile unsigned long *)ptr = x; + local_irq_restore(flags); + break; + default: + __bad_xchg(ptr, size), ret = 0; + break; + } + + return ret; +} + +#define xchg(ptr, x) \ + ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) + +#include <asm-generic/cmpxchg.h> +#include <asm-generic/cmpxchg-local.h> + +#endif /* _ASM_MICROBLAZE_CMPXCHG_H */ |