diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2010-04-04 22:19:03 +0200 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2010-05-24 21:25:32 -0500 |
| commit | b3df895aebe091b1657a42a8c859bd49fc96646b (patch) | |
| tree | 0ae6f069d0774960af631b7979f5cbbb697b2355 /arch/powerpc/kernel/crash.c | |
| parent | 7c08ce718fd04e373d7473918ae02f1c04d5d504 (diff) | |
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.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c index 8c066d6a8e4b..b46f2e09bd81 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); } |