New patch to review for coreboot: soc/intel: Add MSR to support enabling turbo frequency

[Shaunak Saha]

Shaunak Saha ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17211

-gerrit

commit 66b7220e0e45510b7a70bfb2dd6eadf504266343
Author: Shaunak Saha 
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 
---
 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,