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use movsl for copying resume memory back

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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>
This commit is contained in:
Stefan Reinauer 2011-11-17 13:03:38 -08:00 committed by Stefan Reinauer
parent 77adc5e03c
commit 8acbc2a886
1 changed files with 6 additions and 17 deletions
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23
src/arch/x86/boot/wakeup.S
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@ -38,23 +38,12 @@ __wakeup:
movw %ax, (__wakeup_segment) movw %ax, (__wakeup_segment)
/* Then overwrite coreboot with our backed up memory */ /* Then overwrite coreboot with our backed up memory */
movl 8(%esp), %esi cld
movl 12(%esp), %edi movl 8(%esp), %esi
movl 16(%esp), %ecx movl 12(%esp), %edi
shrl $4, %ecx movl 16(%esp), %ecx
1: shrl $2, %ecx
movl 0(%esi),%eax rep movsl
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
/* Activate the right segment descriptor real mode. */ /* Activate the right segment descriptor real mode. */
ljmp $0x28, $RELOCATED(1f) ljmp $0x28, $RELOCATED(1f)