[coreboot-gerrit] New patch to review for coreboot: soc/intel: Add MSR to support enabling turbo frequency
Shaunak Saha (shaunak.saha@intel.com)
gerrit at coreboot.org
Wed Nov 2 19:05:10 CET 2016
Shaunak Saha (shaunak.saha at intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17211
-gerrit
commit 66b7220e0e45510b7a70bfb2dd6eadf504266343
Author: Shaunak Saha <shaunak.saha at intel.com>
Date: Wed Nov 2 10:52:23 2016 -0700
soc/intel: Add MSR to support enabling turbo frequency
This patch adds definition for IA32_PERF_CTL and
FREQ_LIMIT_RATIO MSR's. FREQ_LIMIT_RATIO register
allows determines the ratio limits to be used to
limit frequency. PERF_CTL is Performance Control MSR.
BIOS makes request for a new Performance state (P-state)
by writing this MSR.
BUG=chrome-os-partner:58158
BRANCH=None
Change-Id: I50a792accbaab1bff313fd00574814d7dbba1f6b
Signed-off-by: Shaunak Saha <shaunak.saha at intel.com>
---
src/include/cpu/intel/turbo.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/include/cpu/intel/turbo.h b/src/include/cpu/intel/turbo.h
index 6626cb1..36c8eab 100644
--- a/src/include/cpu/intel/turbo.h
+++ b/src/include/cpu/intel/turbo.h
@@ -23,9 +23,13 @@
#define MSR_IA32_MISC_ENABLES 0x1a0
/* Disable the Monitor Mwait FSM feature */
#define MONITOR_MWAIT_DIS_MASK 0x40000
+#define APL_BURST_MODE_DISABLE 0x0000004000000000ULL
#define H_MISC_DISABLE_TURBO (1 << 6)
+#define IA32_PERL_CTL 0x199
+#define FREQ_LIMIT_RATIO 0x1AD
+
enum {
TURBO_UNKNOWN,
TURBO_UNAVAILABLE,
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