From d8b73dffa9866d6de3c05c8a2d07ecd4bc0d5d7e Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Sat, 20 Mar 2010 07:05:45 +0800 Subject: 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 Signed-off-by: Scott McNutt --- include/asm-nios2/system.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'include/asm-nios2') 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 */ -- cgit v1.1