[POWERPC] cell: Support pinhole-reset on IBM cell blades

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The Cell Broadband Engine has a method of injecting a
system-reset-exception from an external source into the
operating system, which should trigger the regular behaviour
of entering xmon or kdump.

Unfortunately, the exception handler cannot distinguish it from
other interrupt causes by the SRR1 register, which gets used
for this on Power 6 and others.

IBM Blade servers that want to support triggering the
system reset exception using a pinhole button in the front
panel therefore use an extra register to determine the
reset cause.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

--
Signed-off-by: Paul Mackerras <paulus@samba.org>

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Arnd Bergmann 2007-08-23 03:01:26 +10:00 • committed by Paul Mackerras

parent fa7f374bbf

commit 3addf55c94

2 changed files with 32 additions and 2 deletions

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8

arch/powerpc/platforms/cell/cbe_regs.h

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26

arch/powerpc/platforms/cell/pervasive.c

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