From 31ac9e3a9a53523ad342af55b9a20c3c51cd927a Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Fri, 28 Mar 2014 10:52:13 -0700 Subject: baytrail: Configure MSR for 2-core and 4-core P-state configutation Suggested settings to try for performace regression: 2-core systems: - MSR_PMG_CST_CONFIG_CONTROL clear bit 11 (SINGLE_PCTL) - MSR_POWER_MISC clear bit 2,3 - \_PR.CPUx._PSD coordination set to 0xFE (HW_ALL) 4-core systems: - MSR_PMG_CST_CONFIG_CONTROL clear bit 11 (SINGLE_PCTL) - MSR_POWER_MISC clear bit 2,3 - \_PR.CPUx._PSD coordination set to 0xFC (SW_ALL) BUG=chrome-os-partner:26211 BRANCH=baytrail TEST=emerge-rambi chromeos-coreboot-rambi Change-Id: Ib68a86525204ae47a820c269257a7b8df9300a6a Signed-off-by: Duncan Laurie Reviewed-on: https://chromium-review.googlesource.com/192573 Tested-by: Shawn Nematbakhsh Commit-Queue: Shawn Nematbakhsh (cherry picked from commit 8c8c0be0000043610eaa56926eff978f352819b8) Signed-off-by: Marc Jones Reviewed-on: http://review.coreboot.org/7213 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi --- src/soc/intel/baytrail/cpu.c | 32 ++++---------------------------- 1 file changed, 4 insertions(+), 28 deletions(-) (limited to 'src/soc/intel/baytrail/cpu.c') diff --git a/src/soc/intel/baytrail/cpu.c b/src/soc/intel/baytrail/cpu.c index 97d1f04b97..e8f95ae167 100644 --- a/src/soc/intel/baytrail/cpu.c +++ b/src/soc/intel/baytrail/cpu.c @@ -68,37 +68,16 @@ const struct reg_script package_msr_script[] = { /* Core level MSRs */ const struct reg_script core_msr_script[] = { - /* Dynamic L2 shrink enable and threshold */ - REG_MSR_RMW(MSR_PMG_CST_CONFIG_CONTROL, ~0x3f000f, 0xe0008), + /* Dynamic L2 shrink enable and threshold, clear SINGLE_PCTL bit 11 */ + REG_MSR_RMW(MSR_PMG_CST_CONFIG_CONTROL, ~0x3f080f, 0xe0008), + REG_MSR_RMW(MSR_POWER_MISC, + ~(ENABLE_ULFM_AUTOCM_MASK | ENABLE_INDP_AUTOCM_MASK), 0), /* Disable C1E */ REG_MSR_RMW(MSR_POWER_CTL, ~0x2, 0), REG_MSR_OR(MSR_POWER_MISC, 0x44), REG_SCRIPT_END }; -/* Enable hardware coordination for 2-core, disable for 4-core */ -static void baytrail_set_pstate_coord(void) -{ - const struct pattrs *pattrs = pattrs_get(); - msr_t pmg_cst = rdmsr(MSR_PMG_CST_CONFIG_CONTROL); - msr_t power_misc = rdmsr(MSR_POWER_MISC); - - if (pattrs->num_cpus > 2) { - /* Disable hardware coordination */ - pmg_cst.lo |= SINGLE_PCTL; - power_misc.lo &= ~(ENABLE_ULFM_AUTOCM_MASK | - ENABLE_INDP_AUTOCM_MASK); - } else { - /* Enable hardware coordination */ - pmg_cst.lo &= ~SINGLE_PCTL; - power_misc.lo |= (ENABLE_ULFM_AUTOCM_MASK | - ENABLE_INDP_AUTOCM_MASK); - } - - wrmsr(MSR_PMG_CST_CONFIG_CONTROL, pmg_cst); - wrmsr(MSR_POWER_MISC, power_misc); -} - void baytrail_init_cpus(device_t dev) { struct bus *cpu_bus = dev->link_list; @@ -156,9 +135,6 @@ static void baytrail_core_init(device_t cpu) /* Set core MSRs */ reg_script_run(core_msr_script); - /* Set P-State coordination */ - baytrail_set_pstate_coord(); - /* Set this core to max frequency ratio */ set_max_freq(); } -- cgit v1.2.3