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sparc64: Make %pil level 15 a pseudo-NMI.

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So that we can profile code even in a local_irq_disable() section,
only write 14 (instead of 15) into the %pil register to disable IRQs.

This allows PIL level 15 to serve as a pseudo NMI.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2008-11-23 21:55:29 -08:00
parent c6afec5e4d
commit b4f4372f96
12 changed files with 46 additions and 25 deletions
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4
arch/sparc/mm/ultra.S
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@ -466,7 +466,7 @@ xcall_sync_tick:
.previous
rdpr %pil, %g2
wrpr %g0, 15, %pil
wrpr %g0, PIL_NORMAL_MAX, %pil
sethi %hi(109f), %g7
b,pt %xcc, etrap_irq
109: or %g7, %lo(109b), %g7
@ -688,7 +688,7 @@ xcall_kgdb_capture:
.previous
rdpr %pil, %g2
wrpr %g0, 15, %pil
wrpr %g0, PIL_NORMAL_MAX, %pil
sethi %hi(109f), %g7
ba,pt %xcc, etrap_irq
109: or %g7, %lo(109b), %g7