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authorArnd Bergmann <arnd@arndb.de>2007-08-23 03:01:26 +1000
committerPaul Mackerras <paulus@samba.org>2007-08-25 16:58:26 +1000
commit3addf55c9415f9da039947b33d064332137e49fe (patch)
tree27d4984020eb684690202545fb6938f5f24390b2 /Documentation/ioctl
parentfa7f374bbf6d8e5fc7dd281a62498041066aaf43 (diff)
[POWERPC] cell: Support pinhole-reset on IBM cell blades
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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