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authorSumeet R Pawnikar <sumeet.r.pawnikar@intel.com>2020-05-08 22:18:09 +0530
committerPatrick Georgi <pgeorgi@google.com>2020-05-18 07:17:36 +0000
commitfa42d568a00e5daadd35722790c529539227130e (patch)
treec988cc49faf744bc499c837c1aadc569750709ae /src/soc/intel/broadwell/cpu.c
parent71a9a7c70f152e054294495a37f2c02b6b77cd84 (diff)
downloadcoreboot-fa42d568a00e5daadd35722790c529539227130e.tar.xz
broadwell: update processor power limits configuration
Update processor power limit configuration parameters based on common code base support for Intel Broadwell SoC based platforms. BRANCH=None BUG=None TEST=Build for broadwell based platform Change-Id: I97e38a533e74a122b6809e20a10f6e425827ab9c Signed-off-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41234 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/soc/intel/broadwell/cpu.c')
-rw-r--r--src/soc/intel/broadwell/cpu.c143
1 files changed, 1 insertions, 142 deletions
diff --git a/src/soc/intel/broadwell/cpu.c b/src/soc/intel/broadwell/cpu.c
index fb4fecbd3d..1923301aa2 100644
--- a/src/soc/intel/broadwell/cpu.c
+++ b/src/soc/intel/broadwell/cpu.c
@@ -16,6 +16,7 @@
#include <cpu/x86/name.h>
#include <cpu/x86/smm.h>
#include <delay.h>
+#include <intelblocks/cpulib.h>
#include <soc/cpu.h>
#include <soc/msr.h>
#include <soc/pci_devs.h>
@@ -25,64 +26,6 @@
#include <soc/intel/broadwell/chip.h>
#include <cpu/intel/common/common.h>
-/* Convert time in seconds to POWER_LIMIT_1_TIME MSR value */
-static const u8 power_limit_time_sec_to_msr[] = {
- [0] = 0x00,
- [1] = 0x0a,
- [2] = 0x0b,
- [3] = 0x4b,
- [4] = 0x0c,
- [5] = 0x2c,
- [6] = 0x4c,
- [7] = 0x6c,
- [8] = 0x0d,
- [10] = 0x2d,
- [12] = 0x4d,
- [14] = 0x6d,
- [16] = 0x0e,
- [20] = 0x2e,
- [24] = 0x4e,
- [28] = 0x6e,
- [32] = 0x0f,
- [40] = 0x2f,
- [48] = 0x4f,
- [56] = 0x6f,
- [64] = 0x10,
- [80] = 0x30,
- [96] = 0x50,
- [112] = 0x70,
- [128] = 0x11,
-};
-
-/* Convert POWER_LIMIT_1_TIME MSR value to seconds */
-static const u8 power_limit_time_msr_to_sec[] = {
- [0x00] = 0,
- [0x0a] = 1,
- [0x0b] = 2,
- [0x4b] = 3,
- [0x0c] = 4,
- [0x2c] = 5,
- [0x4c] = 6,
- [0x6c] = 7,
- [0x0d] = 8,
- [0x2d] = 10,
- [0x4d] = 12,
- [0x6d] = 14,
- [0x0e] = 16,
- [0x2e] = 20,
- [0x4e] = 24,
- [0x6e] = 28,
- [0x0f] = 32,
- [0x2f] = 40,
- [0x4f] = 48,
- [0x6f] = 56,
- [0x10] = 64,
- [0x30] = 80,
- [0x50] = 96,
- [0x70] = 112,
- [0x11] = 128,
-};
-
/* The core 100MHz BLCK is disabled in deeper c-states. One needs to calibrate
* the 100MHz BCLCK against the 24MHz BLCK to restore the clocks properly
* when a core is woken up. */
@@ -288,90 +231,6 @@ static void configure_pch_power_sharing(void)
RCBA32(PMSYNC_CONFIG2) = pmsync2;
}
-int cpu_config_tdp_levels(void)
-{
- msr_t platform_info;
-
- /* Bits 34:33 indicate how many levels supported */
- platform_info = rdmsr(MSR_PLATFORM_INFO);
- return (platform_info.hi >> 1) & 3;
-}
-
-/*
- * Configure processor power limits if possible
- * This must be done AFTER set of BIOS_RESET_CPL
- */
-void set_power_limits(u8 power_limit_1_time)
-{
- msr_t msr = rdmsr(MSR_PLATFORM_INFO);
- msr_t limit;
- unsigned int power_unit;
- unsigned int tdp, min_power, max_power, max_time;
- u8 power_limit_1_val;
-
- if (power_limit_1_time >= ARRAY_SIZE(power_limit_time_sec_to_msr))
- power_limit_1_time = ARRAY_SIZE(power_limit_time_sec_to_msr) - 1;
-
- if (!(msr.lo & PLATFORM_INFO_SET_TDP))
- return;
-
- /* Get units */
- msr = rdmsr(MSR_PKG_POWER_SKU_UNIT);
- power_unit = 2 << ((msr.lo & 0xf) - 1);
-
- /* Get power defaults for this SKU */
- msr = rdmsr(MSR_PKG_POWER_SKU);
- tdp = msr.lo & 0x7fff;
- min_power = (msr.lo >> 16) & 0x7fff;
- max_power = msr.hi & 0x7fff;
- max_time = (msr.hi >> 16) & 0x7f;
-
- printk(BIOS_DEBUG, "CPU TDP: %u Watts\n", tdp / power_unit);
-
- if (power_limit_time_msr_to_sec[max_time] > power_limit_1_time)
- power_limit_1_time = power_limit_time_msr_to_sec[max_time];
-
- if (min_power > 0 && tdp < min_power)
- tdp = min_power;
-
- if (max_power > 0 && tdp > max_power)
- tdp = max_power;
-
- power_limit_1_val = power_limit_time_sec_to_msr[power_limit_1_time];
-
- /* Set long term power limit to TDP */
- limit.lo = 0;
- limit.lo |= tdp & PKG_POWER_LIMIT_MASK;
- limit.lo |= PKG_POWER_LIMIT_EN;
- limit.lo |= (power_limit_1_val & PKG_POWER_LIMIT_TIME_MASK) <<
- PKG_POWER_LIMIT_TIME_SHIFT;
-
- /* Set short term power limit to 1.25 * TDP */
- limit.hi = 0;
- limit.hi |= ((tdp * 125) / 100) & PKG_POWER_LIMIT_MASK;
- limit.hi |= PKG_POWER_LIMIT_EN;
- /* Power limit 2 time is only programmable on server SKU */
-
- wrmsr(MSR_PKG_POWER_LIMIT, limit);
-
- /* Set power limit values in MCHBAR as well */
- MCHBAR32(MCH_PKG_POWER_LIMIT_LO) = limit.lo;
- MCHBAR32(MCH_PKG_POWER_LIMIT_HI) = limit.hi;
-
- /* Set DDR RAPL power limit by copying from MMIO to MSR */
- msr.lo = MCHBAR32(MCH_DDR_POWER_LIMIT_LO);
- msr.hi = MCHBAR32(MCH_DDR_POWER_LIMIT_HI);
- wrmsr(MSR_DDR_RAPL_LIMIT, msr);
-
- /* Use nominal TDP values for CPUs with configurable TDP */
- if (cpu_config_tdp_levels()) {
- msr = rdmsr(MSR_CONFIG_TDP_NOMINAL);
- limit.hi = 0;
- limit.lo = msr.lo & 0xff;
- wrmsr(MSR_TURBO_ACTIVATION_RATIO, limit);
- }
-}
-
static void configure_c_states(void)
{
msr_t msr;