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nios2: add local_irq_enable/disable to asm-nios2/system.h 

Copy from linux header. This is needed for generic bitops.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
This commit is contained in:
Thomas Chou 2010-03-20 07:05:45 +08:00 committed by Scott McNutt
parent 54d809e755
commit d8b73dffa9
1 changed files with 33 additions and 0 deletions
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33
include/asm-nios2/system.h
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@ -23,4 +23,37 @@
#ifndef __ASM_NIOS2_SYSTEM_H_
#define __ASM_NIOS2_SYSTEM_H_
#define local_irq_enable() __asm__ __volatile__ ( \
"rdctl r8, status\n" \
"ori r8, r8, 1\n" \
"wrctl status, r8\n" \
: : : "r8")
#define local_irq_disable() __asm__ __volatile__ ( \
"rdctl r8, status\n" \
"andi r8, r8, 0xfffe\n" \
"wrctl status, r8\n" \
: : : "r8")
#define local_save_flags(x) __asm__ __volatile__ ( \
"rdctl r8, status\n" \
"mov %0, r8\n" \
: "=r" (x) : : "r8", "memory")
#define local_irq_restore(x) __asm__ __volatile__ ( \
"mov r8, %0\n" \
"wrctl status, r8\n" \
: : "r" (x) : "r8", "memory")
/* For spinlocks etc */
#define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \
while (0)
#define irqs_disabled() \
({ \
unsigned long flags; \
local_save_flags(flags); \
((flags & NIOS2_STATUS_PIE_MSK) == 0x0); \
})
#endif /* __ASM_NIOS2_SYSTEM_H */