Commit-ID: 3e2a0cc3cdc19e0518ae87583add40ea1bf55b67 Gitweb: http://git.kernel.org/tip/3e2a0cc3cdc19e0518ae87583add40ea1bf55b67 Author: Fenghua Yu <fenghua...@intel.com> AuthorDate: Tue, 13 Nov 2012 11:32:45 -0800 Committer: H. Peter Anvin <h...@linux.intel.com> CommitDate: Wed, 14 Nov 2012 09:39:52 -0800
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...@intel.com> Link: http://lkml.kernel.org/r/1352835171-3958-9-git-send-email-fenghua...@intel.com Signed-off-by: H. Peter Anvin <h...@linux.intel.com> --- arch/x86/kernel/head_32.S | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index 957a47a..a013e73 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
