diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2012-07-05 06:31:15 +0300 |
|---|---|---|
| committer | Sven Schnelle <svens@stackframe.org> | 2012-07-05 22:49:31 +0200 |
| commit | 63539bb9d7fe9ae55a364cadfcbd79ecb98a9412 (patch) | |
| tree | 09fd72ad7a5ba7ac47ec84300c47f275c3e67dd1 /src/cpu/x86/lapic/secondary.S | |
| parent | 9a663f3e97fff9cfc3eb9ed2c6e843a68bcabf90 (diff) | |
Only copy real-mode section of SIPI vector
The SIPI vector copy can use a static location below 1MB, aligned
to 4kB. Jump out of the copy once in protected mode.
Change-Id: I6299aa3448270663941cf2c4113efee74bcc7993
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1165
Tested-by: build bot (Jenkins)
Reviewed-by: Sven Schnelle <svens@stackframe.org>
Diffstat (limited to 'src/cpu/x86/lapic/secondary.S')
| -rw-r--r-- | src/cpu/x86/lapic/secondary.S | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/src/cpu/x86/lapic/secondary.S b/src/cpu/x86/lapic/secondary.S index 2ad70296ea..15bae5e5db 100644 --- a/src/cpu/x86/lapic/secondary.S +++ b/src/cpu/x86/lapic/secondary.S @@ -2,8 +2,7 @@ #include <cpu/x86/lapic_def.h> .text - .globl _secondary_start, _secondary_start_end, cpucount - .balign 4096 + .globl _secondary_start, _secondary_start_end, cpucount, ap_protected_start _secondary_start: .code16 cli @@ -25,9 +24,21 @@ _secondary_start: orl $0x60000001, %eax /* CD, NW, PE = 1 */ movl %eax, %cr0 - ljmpl $0x10, $1f -1: + ljmpl $0x10, $__ap_protected_start + +gdtaddr: + .word gdt_limit /* the table limit */ + .long gdt /* we know the offset */ + +_secondary_start_end: + +ap_protected_start: .code32 + lgdt gdtaddr + ljmpl $0x10, $__ap_protected_start + +__ap_protected_start: + movw $0x18, %ax movw %ax, %ds movw %ax, %es @@ -57,9 +68,4 @@ _secondary_start: cpucount: .long 1 -gdtaddr: - .word gdt_limit /* the table limit */ - .long gdt /* we know the offset */ - -_secondary_start_end: .code32 |