[coreboot] [commit] r6583 - trunk/src/mainboard/amd/persimmon

[repository service]

Author: mjones
Date: Sun May 15 23:51:31 2011
New Revision: 6583
URL: https://tracker.coreboot.org/trac/coreboot/changeset/6583

Log:
Switch processor cores to pstate 0 early to reduce boot time.

Signed-off-by: Scott Duplichan <scott at notabs.org>
Acked-by: Marc Jones <marcj303 at gmail.com>

Modified:
   trunk/src/mainboard/amd/persimmon/romstage.c

Modified: trunk/src/mainboard/amd/persimmon/romstage.c
==============================================================================
--- trunk/src/mainboard/amd/persimmon/romstage.c	Sun May 15 23:48:22 2011	(r6582)
+++ trunk/src/mainboard/amd/persimmon/romstage.c	Sun May 15 23:51:31 2011	(r6583)
@@ -47,6 +47,9 @@
   u32 val;
   u8 reg8;
 
+  // all cores: set pstate 0 (1600 MHz) early to save a few ms of boot time
+  __writemsr (0xc0010062, 0);
+
   // early enable of SPI 33 MHz fast mode read
   if (boot_cpu())
     {