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authorDuncan Laurie <dlaurie@chromium.org>2014-12-10 08:16:43 -0800
committerPatrick Georgi <pgeorgi@google.com>2015-04-04 12:40:31 +0200
commit7f28e4ee01cb91750ce6fb84e77e5c7c86afd3ea (patch)
treeddd2a0a3d77d34e5f0b655874090813c58d8f694
parent4a69c34d54d587ba00c6c8e4f9056596014a7541 (diff)
downloadcoreboot-7f28e4ee01cb91750ce6fb84e77e5c7c86afd3ea.tar.xz
broadwell: Enable turbo ratio if available
When turning up the CPU frequency set it to turbo if that is a possibility. Also only set the frequency on the boot CPU since that is all we need it on, this will allow the 1-core turbo ratio. BUG=chrome-os-partner:28234 BRANCH=samus,auron TEST=build and boot on samus Change-Id: I573eb7a507305814ec48cc2f624b8e6ddad43f84 Signed-off-by: Stefan Reinauer <reinauer@chromium.org> Original-Commit-Id: d408c1b462983c682d61c6c447692391c2b52183 Original-Change-Id: Ib5ad746767ee0a56bc7e59de679a9342f053c0e5 Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/234401 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/9281 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
-rw-r--r--src/soc/intel/broadwell/cpu.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/src/soc/intel/broadwell/cpu.c b/src/soc/intel/broadwell/cpu.c
index 1f2ee0d7ba..912f8ae554 100644
--- a/src/soc/intel/broadwell/cpu.c
+++ b/src/soc/intel/broadwell/cpu.c
@@ -485,7 +485,10 @@ static void set_max_ratio(void)
perf_ctl.hi = 0;
/* Check for configurable TDP option */
- if (cpu_config_tdp_levels()) {
+ if (get_turbo_state() == TURBO_ENABLED) {
+ msr = rdmsr(MSR_TURBO_RATIO_LIMIT);
+ perf_ctl.lo = (msr.lo & 0xff) << 8;
+ } else if (cpu_config_tdp_levels()) {
/* Set to nominal TDP ratio */
msr = rdmsr(MSR_CONFIG_TDP_NOMINAL);
perf_ctl.lo = (msr.lo & 0xff) << 8;
@@ -587,9 +590,6 @@ static void cpu_core_init(device_t cpu)
/* Set energy policy */
set_energy_perf_bias(ENERGY_POLICY_NORMAL);
- /* Set Max Ratio */
- set_max_ratio();
-
/* Enable Turbo */
enable_turbo();
}
@@ -692,6 +692,9 @@ void broadwell_init_cpus(device_t dev)
printk(BIOS_ERR, "MP initialization failure.\n");
}
+ /* Set Max Ratio */
+ set_max_ratio();
+
/* Restore the default SMM region. */
restore_default_smm_area(smm_save_area);
}