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author | Paul Mundt <lethal@linux-sh.org> | 2008-07-28 23:09:44 (GMT) |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-07-28 23:09:44 (GMT) |
commit | f15cbe6f1a4b4d9df59142fc8e4abb973302cf44 (patch) | |
tree | 774d7b11abaaf33561ab8268bf51ddd9ceb79025 /arch/sh/include/asm/atomic-irq.h | |
parent | 25326277d8d1393d1c66240e6255aca780f9e3eb (diff) | |
download | linux-fsl-qoriq-f15cbe6f1a4b4d9df59142fc8e4abb973302cf44.tar.xz |
sh: migrate to arch/sh/include/
This follows the sparc changes a439fe51a1f8eb087c22dd24d69cebae4a3addac.
Most of the moving about was done with Sam's directions at:
http://marc.info/?l=linux-sh&m=121724823706062&w=2
with subsequent hacking and fixups entirely my fault.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include/asm/atomic-irq.h')
-rw-r--r-- | arch/sh/include/asm/atomic-irq.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/sh/include/asm/atomic-irq.h b/arch/sh/include/asm/atomic-irq.h new file mode 100644 index 0000000..74f7943 --- /dev/null +++ b/arch/sh/include/asm/atomic-irq.h @@ -0,0 +1,71 @@ +#ifndef __ASM_SH_ATOMIC_IRQ_H +#define __ASM_SH_ATOMIC_IRQ_H + +/* + * To get proper branch prediction for the main line, we must branch + * forward to code at the end of this object's .text section, then + * branch back to restart the operation. + */ +static inline void atomic_add(int i, atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + *(long *)v += i; + local_irq_restore(flags); +} + +static inline void atomic_sub(int i, atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + *(long *)v -= i; + local_irq_restore(flags); +} + +static inline int atomic_add_return(int i, atomic_t *v) +{ + unsigned long temp, flags; + + local_irq_save(flags); + temp = *(long *)v; + temp += i; + *(long *)v = temp; + local_irq_restore(flags); + + return temp; +} + +static inline int atomic_sub_return(int i, atomic_t *v) +{ + unsigned long temp, flags; + + local_irq_save(flags); + temp = *(long *)v; + temp -= i; + *(long *)v = temp; + local_irq_restore(flags); + + return temp; +} + +static inline void atomic_clear_mask(unsigned int mask, atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + *(long *)v &= ~mask; + local_irq_restore(flags); +} + +static inline void atomic_set_mask(unsigned int mask, atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + *(long *)v |= mask; + local_irq_restore(flags); +} + +#endif /* __ASM_SH_ATOMIC_IRQ_H */ |