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authorMichael Neuling <mikey@neuling.org>2008-01-18 15:50:30 +1100
committerPaul Mackerras <paulus@samba.org>2008-01-25 22:52:50 +1100
commit496b010e1e70a9b4286fa34f19523f24a194f119 (patch)
tree82304fcb3342e1204fe2b2b69c0f396068ad409c /include/asm-powerpc/kexec.h
parentc3b75bd7bbf4a0438dc140033b80657995fd30ed (diff)
[POWERPC] kdump shutdown hook support
This adds hooks into the default_machine_crash_shutdown so drivers can register a function to be run in the first kernel before we hand off to the second kernel. This should only be used in exceptional circumstances, like where the device can't be reset in the second kernel alone (as is the case with eHEA). To emphasize this, the number of handles allowed to be registered is currently #def to 1. This uses the setjmp/longjmp code around the call out to the registered hooks, so any bogus exceptions we encounter will hopefully be recoverable. Tested with bogus data and instruction exceptions. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/kexec.h')
-rw-r--r--include/asm-powerpc/kexec.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-powerpc/kexec.h b/include/asm-powerpc/kexec.h
index b6f817b8ba3..701857bc8e2 100644
--- a/include/asm-powerpc/kexec.h
+++ b/include/asm-powerpc/kexec.h
@@ -123,6 +123,9 @@ struct pt_regs;
extern void default_machine_kexec(struct kimage *image);
extern int default_machine_kexec_prepare(struct kimage *image);
extern void default_machine_crash_shutdown(struct pt_regs *regs);
+typedef void (*crash_shutdown_t)(void);
+extern int crash_shutdown_register(crash_shutdown_t handler);
+extern int crash_shutdown_unregister(crash_shutdown_t handler);
extern void machine_kexec_simple(struct kimage *image);
extern void crash_kexec_secondary(struct pt_regs *regs);