Messages in this thread Patch in this message | | | From | "Fenghua Yu" <> | Subject | [PATCH v8 07/12] x86-32, hotplug: Add start_cpu0() entry point to head_32.S | Date | Sat, 25 Aug 2012 10:41:23 -0700 |
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From: Fenghua Yu <fenghua.yu@intel.com>
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> --- arch/x86/kernel/head_32.S | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index d42ab17..964f87a 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -266,6 +266,18 @@ 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) +#endif + /* * Non-boot CPU entry point; entered from trampoline.S * We can't lgdt here, because lgdt itself uses a data segment, but -- 1.7.2
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