korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2025-01-25 07:14:36 +08:00
Code Issues Packages Projects Releases Wiki Activity

x86-32, hotplug: Add start_cpu0() entry point to head_32.S

Browse Source 
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>
This commit is contained in:
Fenghua Yu 2012-11-13 11:32:45 -08:00 committed by H. Peter Anvin
parent 42e78e9719
commit 3e2a0cc3cd
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
arch/x86/kernel/head_32.S
View File

@ -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