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| author | Thomas Chou <thomas@wytron.com.tw> | 2010-03-20 07:05:45 +0800 |
|---|---|---|
| committer | Scott McNutt <smcnutt@psyent.com> | 2010-04-02 12:28:40 -0400 |
| commit | d8b73dffa9866d6de3c05c8a2d07ecd4bc0d5d7e (patch) | |
| tree | c38ef59e9e12c883a25e2aea2e4c56ad316a3193 | |
| parent | 54d809e7553939629e8941ab9eef1f762463a2b3 (diff) | |
| download | u-boot-imx-d8b73dffa9866d6de3c05c8a2d07ecd4bc0d5d7e.zip u-boot-imx-d8b73dffa9866d6de3c05c8a2d07ecd4bc0d5d7e.tar.gz u-boot-imx-d8b73dffa9866d6de3c05c8a2d07ecd4bc0d5d7e.tar.bz2 | |
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>
| -rw-r--r-- | include/asm-nios2/system.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/asm-nios2/system.h b/include/asm-nios2/system.h index ec84f59..bb03ca5 100644 --- a/include/asm-nios2/system.h +++ b/include/asm-nios2/system.h @@ -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 */ |