[coreboot-gerrit] Change in coreboot[master]: libpayload: enable cache and Write through

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/23582


Change subject: libpayload: enable cache and Write through
......................................................................

libpayload: enable cache and Write through

And enable cache and Write through.

Change-Id: I789f7725ad7b04518f99ebc8cb994d18eefe1d4c
Signed-off-by: Patrick Rudolph <siro at das-labor.org>
---
M payloads/libpayload/arch/x86/main.c
1 file changed, 9 insertions(+), 0 deletions(-)



  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/82/23582/1

diff --git a/payloads/libpayload/arch/x86/main.c b/payloads/libpayload/arch/x86/main.c
index f9a5e2c..5f7f505 100644
--- a/payloads/libpayload/arch/x86/main.c
+++ b/payloads/libpayload/arch/x86/main.c
@@ -62,6 +62,15 @@
 	 * user gets control goes here.
 	 */
 
+	/* And enable cache and Write through */
+	__asm__ __volatile__ (
+		"movl %%cr0, %%eax\n\t"
+		"andl $0x9FFFFFFF, %%eax\n\t" /* clear CD, NW */
+		"movl %%eax, %%cr0\n\t"
+		: :
+		: "ax"
+	);
+
 	/*
 	 * Go to the entry point.
 	 * In the future we may care about the return value.

-- 
To view, visit https://review.coreboot.org/23582
To unsubscribe, or for help writing mail filters, visit https://review.coreboot.org/settings

Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I789f7725ad7b04518f99ebc8cb994d18eefe1d4c
Gerrit-Change-Number: 23582
Gerrit-PatchSet: 1
Gerrit-Owner: Patrick Rudolph <siro at das-labor.org>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.coreboot.org/pipermail/coreboot-gerrit/attachments/20180203/09d4520f/attachment-0001.html>