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baytrail: Set some MSRs related to turbo power

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These values are from the reference code but do not appear
to be documented elsewhere.

BUG=chrome-os-partner:23505
BRANCH=baytrail
TEST=build and boot on rambi

Change-Id: Id9eaa50a4fd5f729f4e1b20baec9390b0e717bf6
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/186933
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Duncan Laurie 2014-02-18 09:26:34 -08:00 • committed by chrome-internal-fetch
commit 76b25df5a3
2 changed files with 8 additions and 0 deletions
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4
src/soc/intel/baytrail/baytrail/msr.h
View file

@ -30,6 +30,7 @@
#define MSR_POWER_CTL 0x1fc
#define MSR_PKG_POWER_SKU_UNIT 0x606
#define MSR_PKG_POWER_LIMIT 0x610
#define MSR_PP1_POWER_LIMIT 0x638
#define MSR_IACORE_RATIOS 0x66a
#define MSR_IACORE_TURBO_RATIOS 0x66c
#define MSR_IACORE_VIDS 0x66b
@ -37,6 +38,9 @@
#define MSR_PKG_TURBO_CFG1 0x670
#define MSR_CPU_TURBO_WKLD_CFG1 0x671
#define MSR_CPU_TURBO_WKLD_CFG2 0x672
#define MSR_CPU_THERM_CFG1 0x673
#define MSR_CPU_THERM_CFG2 0x674
#define MSR_CPU_THERM_SENS_CFG 0x675
/* Read BCLK from MSR */
unsigned bus_freq_khz(void);

4
src/soc/intel/baytrail/cpu.c
View file

@ -55,9 +55,13 @@ static int adjust_apic_id(int index, int apic_id)
const struct reg_script package_msr_script[] = {
/* Set Package TDP to ~7W */
REG_MSR_WRITE(MSR_PKG_POWER_LIMIT, 0x3880fa),
REG_MSR_RMW(MSR_PP1_POWER_LIMIT, ~(0x7f << 17), 0),
REG_MSR_WRITE(MSR_PKG_TURBO_CFG1, 0x702),
REG_MSR_WRITE(MSR_CPU_TURBO_WKLD_CFG1, 0x200b),
REG_MSR_WRITE(MSR_CPU_TURBO_WKLD_CFG2, 0),
REG_MSR_WRITE(MSR_CPU_THERM_CFG1, 0x00000305),
REG_MSR_WRITE(MSR_CPU_THERM_CFG2, 0x0405500d),
REG_MSR_WRITE(MSR_CPU_THERM_SENS_CFG, 0x27),
REG_SCRIPT_END
};