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x86: Dont clobber %eax after getting memory size

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By using another register, reduce code size by one instruction
This commit is contained in:
Graeme Russ
2010-10-07 20:03:28 +11:00
parent 5f2679055d
commit 5a3876d2ac
1 changed files with 2 additions and 3 deletions
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5
arch/i386/cpu/start.S
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@@ -114,8 +114,8 @@ mem_ok:
/* Test the stack */ /* Test the stack */
pushl $0 pushl $0
popl %eax popl %ecx
cmpl $0, %eax cmpl $0, %ecx
jne die jne die
push $0x55aa55aa push $0x55aa55aa
popl %ecx popl %ecx
@@ -125,7 +125,6 @@ mem_ok:
wbinvd wbinvd
/* Set the upper memory limit parameter */ /* Set the upper memory limit parameter */
movl %esp, %eax
subl $CONFIG_SYS_STACK_SIZE, %eax subl $CONFIG_SYS_STACK_SIZE, %eax
call board_init_f /* Enter, U-boot! */ call board_init_f /* Enter, U-boot! */