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| author | Fenghua Yu <fenghua.yu@intel.com> | 2012-11-13 20:32:45 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-14 18:39:52 +0100 |
| commit | 3e2a0cc3cdc19e0518ae87583add40ea1bf55b67 (patch) | |
| tree | 7fcb783ebf62ef633244bb8b958d5c5894308931 /arch/x86/kernel/head_32.S | |
| parent | x86-64, hotplug: Add start_cpu0() entry point to head_64.S (diff) | |
| download | linux-3e2a0cc3cdc19e0518ae87583add40ea1bf55b67.tar.xz linux-3e2a0cc3cdc19e0518ae87583add40ea1bf55b67.zip | |
x86-32, hotplug: Add start_cpu0() entry point to head_32.S
start_cpu0() is defined in head_32.S for 32-bit. The function sets up stack and
jumps to start_secondary() for CPU0 wake up.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1352835171-3958-9-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/head_32.S')
| -rw-r--r-- | arch/x86/kernel/head_32.S | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index 957a47aec64e..a013e7390ab5 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -266,6 +266,19 @@ num_subarch_entries = (. - subarch_entries) / 4 jmp default_entry #endif /* CONFIG_PARAVIRT */ +#ifdef CONFIG_HOTPLUG_CPU +/* + * Boot CPU0 entry point. It's called from play_dead(). Everything has been set + * up already except stack. We just set up stack here. Then call + * start_secondary(). + */ +ENTRY(start_cpu0) + movl stack_start, %ecx + movl %ecx, %esp + jmp *(initial_code) +ENDPROC(start_cpu0) +#endif + /* * Non-boot CPU entry point; entered from trampoline.S * We can't lgdt here, because lgdt itself uses a data segment, but |