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| 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/include/asm | |
| parent | 7c08ce718fd04e373d7473918ae02f1c04d5d504 (diff) | |
| download | talos-obmc-linux-b3df895aebe091b1657a42a8c859bd49fc96646b.tar.gz talos-obmc-linux-b3df895aebe091b1657a42a8c859bd49fc96646b.zip | |
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/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/kexec.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h index a6ca6da1430b..2a9cd74a841e 100644 --- a/arch/powerpc/include/asm/kexec.h +++ b/arch/powerpc/include/asm/kexec.h @@ -2,6 +2,18 @@ #define _ASM_POWERPC_KEXEC_H #ifdef __KERNEL__ +#ifdef CONFIG_FSL_BOOKE + +/* + * On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory + * and therefore we can only deal with memory within this range + */ +#define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL) +#define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL) +#define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL) + +#else + /* * Maximum page that is mapped directly into kernel memory. * XXX: Since we copy virt we can use any page we allocate @@ -21,6 +33,7 @@ /* TASK_SIZE, probably left over from use_mm ?? */ #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE #endif +#endif #define KEXEC_CONTROL_PAGE_SIZE 4096 |
