diff options
| author | Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com> | 2020-06-18 15:56:11 +0530 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-06-28 21:47:52 +0000 |
| commit | 360684b41aec795d254dcaac1cefb4acf9e129d3 (patch) | |
| tree | c5bbde89d9734c08e7fea993e0403ee05f570091 /src/soc/intel/common | |
| parent | 5270ce133e068fd35a985b62a22ca64ca2fa9696 (diff) | |
soc/intel/common: add TCC activation functionality
This enables to configure the Thermal Control Circuit (TCC) activation
value to new value as tcc_offset in degree Celcius. It prevents any
abrupt thermal shutdown while running heavy workload. This helps to
take early thermal throttling action before CPU temperature reaches
maximum operating temperature TjMax value. Also, cleanup local functions
from previous intel soc specific code base like for apollolake, broadwell,
skylake and cannonlake.
BUG=None
BRANCH=None
TEST=Built for volteer platform and verified the MSR value.
Change-Id: I37dd878902b080602d70c5c3c906820613ea14a5
Signed-off-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41855
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/soc/intel/common')
| -rw-r--r-- | src/soc/intel/common/block/cpu/cpulib.c | 21 | ||||
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/cpulib.h | 3 |
2 files changed, 24 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/cpu/cpulib.c b/src/soc/intel/common/block/cpu/cpulib.c index dac654fea6..0ac8dda1a4 100644 --- a/src/soc/intel/common/block/cpu/cpulib.c +++ b/src/soc/intel/common/block/cpu/cpulib.c @@ -8,6 +8,7 @@ #include <intelblocks/cpulib.h> #include <intelblocks/fast_spi.h> #include <intelblocks/msr.h> +#include <soc/soc_chip.h> #include <stdint.h> /* @@ -254,6 +255,26 @@ uint32_t cpu_get_max_ratio(void) return ratio_max; } +void configure_tcc_thermal_target(void) +{ + const config_t *conf = config_of_soc(); + msr_t msr; + + /* Set TCC activation offset */ + msr = rdmsr(MSR_PLATFORM_INFO); + if ((msr.lo & BIT(30)) && conf->tcc_offset) { + msr = rdmsr(MSR_TEMPERATURE_TARGET); + msr.lo &= ~(0xf << 24); + msr.lo |= (conf->tcc_offset & 0xf) << 24; + wrmsr(MSR_TEMPERATURE_TARGET, msr); + } + msr = rdmsr(MSR_TEMPERATURE_TARGET); + /* Time Window Tau Bits [6:0] */ + msr.lo &= ~0x7f; + msr.lo |= 0xe6; /* setting 100ms thermal time window */ + wrmsr(MSR_TEMPERATURE_TARGET, msr); +} + uint32_t cpu_get_bus_clock(void) { /* CPU bus clock is set by default here to 100MHz. diff --git a/src/soc/intel/common/block/include/intelblocks/cpulib.h b/src/soc/intel/common/block/include/intelblocks/cpulib.h index 73f4e38332..09f5e45577 100644 --- a/src/soc/intel/common/block/include/intelblocks/cpulib.h +++ b/src/soc/intel/common/block/include/intelblocks/cpulib.h @@ -133,6 +133,9 @@ uint32_t cpu_get_min_ratio(void); */ uint32_t cpu_get_max_ratio(void); +/* Thermal throttle activation offset */ +void configure_tcc_thermal_target(void); + /* * cpu_get_power_max calculates CPU TDP in mW */ |