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authorThomas Chou <thomas@wytron.com.tw>2010-03-20 07:05:45 +0800
committerScott McNutt <smcnutt@psyent.com>2010-04-02 12:28:40 -0400
commitd8b73dffa9866d6de3c05c8a2d07ecd4bc0d5d7e (patch)
treec38ef59e9e12c883a25e2aea2e4c56ad316a3193 /include/asm-nios2
parent54d809e7553939629e8941ab9eef1f762463a2b3 (diff)
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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>
Diffstat (limited to 'include/asm-nios2')
-rw-r--r--include/asm-nios2/system.h33
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 */