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authorAaron Durbin <adurbin@chromium.org>2013-03-20 13:49:27 -0500
committerRonald G. Minnich <rminnich@gmail.com>2013-03-20 21:48:32 +0100
commiteb06a4259b48128faed94b4ca3f8c64d3cd5a4c3 (patch)
treebd0f9ac205315f4443c35ea0c016e1da298f3885 /src/arch/x86
parent1cc4737c3bc7e0b1e560f3d049f4edbef9340177 (diff)
x86: don't clear bss in ramstage entry
The cbfs stage loading routine already zeros out the full memory region that a stage will be loaded. Therefore, it is unnecessary to to clear the bss again after once ramstage starts. Change-Id: Icc7021329dbf59bef948a41606f56746f21b507f Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/2865 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <patrick@georgi-clan.de> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/arch/x86')
-rw-r--r--src/arch/x86/lib/c_start.S11
1 files changed, 0 insertions, 11 deletions
diff --git a/src/arch/x86/lib/c_start.S b/src/arch/x86/lib/c_start.S
index 295283b24a..35bc26b789 100644
--- a/src/arch/x86/lib/c_start.S
+++ b/src/arch/x86/lib/c_start.S
@@ -29,17 +29,6 @@ _start:
cld
- /** clear bss, which unlike the stack is zero by definition */
- leal _bss, %edi
- movl $_ebss, %ecx
- subl %edi, %ecx
- jz .Lnobss
- shrl $2, %ecx /* it is 32 bit aligned, right? */
- xorl %eax, %eax
- rep
- stosl
-.Lnobss:
-
/** poison the stack. Code should not count on the
* stack being full of zeros. This stack poisoning
* recently uncovered a bug in the broadcast SIPI