diff options
| author |   David S. Miller <davem@davemloft.net> | 2008-11-25 22:27:50 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-04 09:17:05 -0800 |
| commit | 456cad8e4e1754672e6df1e716cff1482ea124ce (patch) | |
| tree | baef3611a9d974a0d6b17c5d566223c234edf883 /arch | |
| parent | sparc64: Block NMIs in critical section of context switch. (diff) | |
| download | linux-dev-456cad8e4e1754672e6df1e716cff1482ea124ce.tar.xz linux-dev-456cad8e4e1754672e6df1e716cff1482ea124ce.zip | |
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@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | 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 779cf62d3ce9..6c077816ab28 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__ |