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authorStefan Reinauer <reinauer@chromium.org>2011-11-17 13:03:38 -0800
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-03-30 17:58:55 +0200
commit8acbc2a8865ca74f0f80c51c6511b9ab4c03d552 (patch)
treec6a901f5e2e4daea98be03ff6f8c88aa25ef2289 /src/arch/x86/boot
parent77adc5e03cd72ba4091ebf446abc3b19a73ee8fb (diff)
use movsl for copying resume memory back
It's not significantly faster, but easier to read and smaller. Change-Id: Ibab0b478873912d67bf1f07743f628586353368a Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/755 Reviewed-by: Mathias Krause <minipli@googlemail.com> Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/arch/x86/boot')
-rw-r--r--src/arch/x86/boot/wakeup.S23
1 files changed, 6 insertions, 17 deletions
diff --git a/src/arch/x86/boot/wakeup.S b/src/arch/x86/boot/wakeup.S
index a1df4d5597..8ae337ca5d 100644
--- a/src/arch/x86/boot/wakeup.S
+++ b/src/arch/x86/boot/wakeup.S
@@ -38,23 +38,12 @@ __wakeup:
movw %ax, (__wakeup_segment)
/* Then overwrite coreboot with our backed up memory */
- movl 8(%esp), %esi
- movl 12(%esp), %edi
- movl 16(%esp), %ecx
- shrl $4, %ecx
-1:
- movl 0(%esi),%eax
- movl 4(%esi),%edx
- movl 8(%esi),%ebx
- movl 12(%esi),%ebp
- addl $16,%esi
- subl $1,%ecx
- movl %eax,0(%edi)
- movl %edx,4(%edi)
- movl %ebx,8(%edi)
- movl %ebp,12(%edi)
- leal 16(%edi),%edi
- jne 1b
+ cld
+ movl 8(%esp), %esi
+ movl 12(%esp), %edi
+ movl 16(%esp), %ecx
+ shrl $2, %ecx
+ rep movsl
/* Activate the right segment descriptor real mode. */
ljmp $0x28, $RELOCATED(1f)