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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2010-04-04 22:19:03 +0200
committerKumar Gala <galak@kernel.crashing.org>2010-05-24 21:25:32 -0500
commitb3df895aebe091b1657a42a8c859bd49fc96646b (patch)
tree0ae6f069d0774960af631b7979f5cbbb697b2355 /arch/powerpc/kernel/crash.c
parent7c08ce718fd04e373d7473918ae02f1c04d5d504 (diff)
downloadop-kernel-dev-b3df895aebe091b1657a42a8c859bd49fc96646b.zip
op-kernel-dev-b3df895aebe091b1657a42a8c859bd49fc96646b.tar.gz
powerpc/kexec: Add support for FSL-BookE
This adds support kexec on FSL-BookE where the MMU can not be simply switched off. The code borrows the initial MMU-setup code to create the identical mapping mapping. The only difference to the original boot code is the size of the mapping(s) and the executeable address. The kexec code maps the first 2 GiB of memory in 256 MiB steps. This should work also on e500v1 boxes. SMP support is still not available. (Kumar: Added minor change to build to ifdef CONFIG_PPC_STD_MMU_64 some code that was PPC64 specific) Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/crash.c')
-rw-r--r--arch/powerpc/kernel/crash.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 8c066d6..b46f2e0 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -163,6 +163,7 @@ static void crash_kexec_prepare_cpus(int cpu)
}
/* wait for all the CPUs to hit real mode but timeout if they don't come in */
+#ifdef CONFIG_PPC_STD_MMU_64
static void crash_kexec_wait_realmode(int cpu)
{
unsigned int msecs;
@@ -187,6 +188,7 @@ static void crash_kexec_wait_realmode(int cpu)
}
mb();
}
+#endif
/*
* This function will be called by secondary cpus or by kexec cpu
@@ -445,7 +447,9 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
crash_kexec_prepare_cpus(crashing_cpu);
cpu_set(crashing_cpu, cpus_in_crash);
crash_kexec_stop_spus();
+#ifdef CONFIG_PPC_STD_MMU_64
crash_kexec_wait_realmode(crashing_cpu);
+#endif
if (ppc_md.kexec_cpu_down)
ppc_md.kexec_cpu_down(1, 0);
}
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