sparc64: Add write_pic() helper.
It writes the %pic register, keeping mind of processor bugs.
Implement reset_pic() in terms of it.
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
arch/sparc/include/asm/system_64.h | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/sparc/include/asm/system_64.h b/arch/sparc/include/asm/system_64.h
index 779cf62..6c07781 100644
--- a/arch/sparc/include/asm/system_64.h
+++ b/arch/sparc/include/asm/system_64.h
@@ -96,11 +96,12 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
* arch/sparc64/kernel/smp.c:smp_percpu_timer_interrupt()
* for more information.
*/
-#define reset_pic() \
- __asm__ __volatile__("ba,pt %xcc, 99f\n\t" \
+#define write_pic(__p) \
+ __asm__ __volatile__("ba,pt %%xcc, 99f\n\t" \
".align 64\n" \
- "99:wr %g0, 0x0, %pic\n\t" \
- "rd %pic, %g0")
+ "99:wr %0, 0x0, %%pic\n\t" \
+ "rd %%pic, %%g0" : : "r" (__p))
+#define reset_pic() write_pic(0)
#ifndef __ASSEMBLY__
--
1.5.6.5
--
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