New patch to review for coreboot: arch/x86: Enable SSE in bootblock_crt0.S

[Leroy P Leahy]

Leroy P Leahy ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/15128

-gerrit

commit 4a59758e54b90e3eee880f3fa87a810b1e015fbe
Author: Lee Leahy 
Date:   Wed Jun 8 07:11:48 2016 -0700

arch/x86: Enable SSE in bootblock_crt0.S

Don't write reserved bits in the Quark platform.  Follow the previous
    boot behavior and just enable SSE.

TEST=Build and run on Galileo Gen2

Change-Id: Ib3143eff02b2610b595bd666c10d70e43103ccda
    Signed-off-by: Lee Leahy 
---
 src/arch/x86/bootblock_crt0.S | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/arch/x86/bootblock_crt0.S b/src/arch/x86/bootblock_crt0.S
index 1d66bdc..8ff95af 100644
--- a/src/arch/x86/bootblock_crt0.S
+++ b/src/arch/x86/bootblock_crt0.S
@@ -56,14 +56,10 @@ bootblock_protected_mode_entry:
 #include CONFIG_BOOTBLOCK_SAVE_TIMESTAMP
 #endif

-#if !IS_ENABLED(CONFIG_SSE)
+#if IS_ENABLED(CONFIG_SSE)
 enable_sse:
-	mov	%cr0, %eax
-	and	$~CR0_EM, %ax		/* Clear coprocessor emulation CR0.EM */
-	or	$CR0_MP, %ax		/* Set coprocessor monitoring  CR0.MP */
-	mov	%eax, %cr0
    mov	%cr4, %eax
-	or	$(CR4_OSFXSR | CR4_OSXMMEXCPT), %ax
+	or	$CR4_OSFXSR, %ax
    mov	%eax, %cr4
 #endif /* IS_ENABLED(CONFIG_SSE) */