Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4952
-gerrit
commit 61786b30c2d1cba896e01c0d31302efb68592f06 Author: Duncan Laurie dlaurie@chromium.org Date: Tue Nov 5 12:59:50 2013 -0800
baytrail: Enable Turbo/Burst and set some magic MSRs
As far as I can tell turbo enabling behaves like it did on haswell so use the standard code.
There are also some magic values to set in some magic MSRs related to turbo and package power so they report correctly.
The L2 cache shrink is enabled and a threshold is set that makes both dual and quad core happy.
C1E is disabled to match the reference code.
BUG=chrome-os-partner:23505 BRANCH=rambi TEST=build and boot on rambi
Change-Id: Ic6d4283d480a44d85a9b96571baf83928615665c Signed-off-by: Duncan Laurie dlaurie@chromium.org Reviewed-on: https://chromium-review.googlesource.com/175743 Reviewed-by: Aaron Durbin adurbin@chromium.org Commit-Queue: Aaron Durbin adurbin@chromium.org Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/soc/intel/baytrail/Makefile.inc | 1 + src/soc/intel/baytrail/baytrail/msr.h | 8 ++++++++ src/soc/intel/baytrail/cpu.c | 35 +++++++++++++++++++++++++++++++++++ 3 files changed, 44 insertions(+)
diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc index 952d0ec..f06640f 100644 --- a/src/soc/intel/baytrail/Makefile.inc +++ b/src/soc/intel/baytrail/Makefile.inc @@ -6,6 +6,7 @@ subdirs-y += ../../../cpu/x86/mtrr subdirs-y += ../../../cpu/x86/smm subdirs-y += ../../../cpu/x86/tsc subdirs-y += ../../../cpu/intel/microcode +subdirs-y += ../../../cpu/intel/turbo
ramstage-y += memmap.c romstage-y += memmap.c diff --git a/src/soc/intel/baytrail/baytrail/msr.h b/src/soc/intel/baytrail/baytrail/msr.h index 5094f96..462f249 100644 --- a/src/soc/intel/baytrail/baytrail/msr.h +++ b/src/soc/intel/baytrail/baytrail/msr.h @@ -23,9 +23,17 @@ #define MSR_IA32_PLATFORM_ID 0x17 #define MSR_BSEL_CR_OVERCLOCK_CONTROL 0xcd #define MSR_PLATFORM_INFO 0xce +#define MSR_PMG_CST_CONFIG_CONTROL 0xe2 +#define MSR_POWER_MISC 0x120 #define MSR_IA32_PERF_CTL 0x199 #define MSR_IA32_MISC_ENABLES 0x1a0 +#define MSR_POWER_CTL 0x1fc +#define MSR_PKG_POWER_SKU_UNIT 0x606 +#define MSR_PKG_POWER_LIMIT 0x610 #define MSR_IACORE_RATIOS 0x66a #define MSR_IACORE_VIDS 0x66b +#define MSR_PKG_TURBO_CFG1 0x670 +#define MSR_CPU_TURBO_WKLD_CFG1 0x671 +#define MSR_CPU_TURBO_WKLD_CFG2 0x672
#endif /* _BAYTRAIL_IOSF_H_ */ diff --git a/src/soc/intel/baytrail/cpu.c b/src/soc/intel/baytrail/cpu.c index 1226e47..e276f83 100644 --- a/src/soc/intel/baytrail/cpu.c +++ b/src/soc/intel/baytrail/cpu.c @@ -21,13 +21,16 @@ #include <console/console.h> #include <cpu/cpu.h> #include <cpu/intel/microcode.h> +#include <cpu/intel/turbo.h> #include <cpu/x86/cache.h> #include <cpu/x86/lapic.h> #include <cpu/x86/mp.h> #include <cpu/x86/msr.h> #include <cpu/x86/mtrr.h> #include <cpu/x86/smm.h> +#include <reg_script.h>
+#include <baytrail/msr.h> #include <baytrail/pattrs.h> #include <baytrail/ramstage.h> #include <baytrail/smm.h> @@ -48,6 +51,26 @@ static int adjust_apic_id(int index, int apic_id) return 2 * index; }
+/* Package level MSRs */ +const struct reg_script package_msr_script[] = { + /* Set Package TDP to ~7W */ + REG_MSR_WRITE(MSR_PKG_POWER_LIMIT, 0x3880fa), + 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_SCRIPT_END +}; + +/* 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), + /* Disable C1E */ + REG_MSR_RMW(MSR_POWER_CTL, ~0x2, 0), + REG_MSR_OR(MSR_POWER_MISC, 0x44), + REG_SCRIPT_END +}; + void baytrail_init_cpus(device_t dev) { struct bus *cpu_bus = dev->link_list; @@ -66,6 +89,12 @@ void baytrail_init_cpus(device_t dev) mp_params.num_records = ARRAY_SIZE(mp_steps); mp_params.microcode_pointer = pattrs->microcode_patch;
+ /* Set package MSRs */ + reg_script_run(package_msr_script); + + /* Enable Turbo/Burst Mode */ + enable_turbo(); + if (mp_init(cpu_bus, &mp_params)) { printk(BIOS_ERR, "MP initialization failure.\n"); } @@ -74,6 +103,12 @@ void baytrail_init_cpus(device_t dev) static void baytrail_core_init(device_t cpu) { printk(BIOS_DEBUG, "Init BayTrail core.\n"); + + /* Set core MSRs */ + reg_script_run(core_msr_script); + + /* Set this core to max frequency ratio */ + set_max_freq(); }
static struct device_operations cpu_dev_ops = {