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author | Ingo Molnar <mingo@elte.hu> | 2008-03-21 14:23:19 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 15:41:37 (GMT) |
commit | 77ad386e596c6b0930cc2e09e3cce485e3ee7f72 (patch) | |
tree | 5c4a9b664c8ecf8147996a32eae35ff7e7350f89 /arch/x86/kernel/trampoline.c | |
parent | e44b7b7525ad9d43163ab5e60c784325419e0ea6 (diff) | |
download | linux-fsl-qoriq-77ad386e596c6b0930cc2e09e3cce485e3ee7f72.tar.xz |
x86: standalone trampoline code
move the trampoline setup code out of smpboot.c - UP kernels can have
suspend support too.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/trampoline.c')
-rw-r--r-- | arch/x86/kernel/trampoline.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/kernel/trampoline.c b/arch/x86/kernel/trampoline.c new file mode 100644 index 0000000..abbf199 --- /dev/null +++ b/arch/x86/kernel/trampoline.c @@ -0,0 +1,18 @@ +#include <linux/io.h> + +#include <asm/trampoline.h> + +/* ready for x86_64, no harm for x86, since it will overwrite after alloc */ +unsigned char *trampoline_base = __va(TRAMPOLINE_BASE); + +/* + * Currently trivial. Write the real->protected mode + * bootstrap into the page concerned. The caller + * has made sure it's suitably aligned. + */ +unsigned long setup_trampoline(void) +{ + memcpy(trampoline_base, trampoline_data, + trampoline_end - trampoline_data); + return virt_to_phys(trampoline_base); +} |