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| author | Patrick Georgi <patrick.georgi@secunet.com> | 2011-08-09 08:52:14 +0200 |
|---|---|---|
| committer | Patrick Georgi <patrick@georgi-clan.de> | 2011-09-09 11:40:30 +0200 |
| commit | ac624a638d25645f9a9a25ee2e16224aaf921b98 (patch) | |
| tree | 0ebf9c2c9b287f74c10ffce7cf3a9cddd6361c33 /src/cpu/intel/model_6ex | |
| parent | 7981b940a6bd703ae97f6c765c107ea7b4913dec (diff) | |
Crank up CPU speed on Intel Core and Core2 CPUs
The CPUs start on their slowest speed, and were left that way by
coreboot. This change will speed up coreboot a bit, as well as
systems that don't change the clock for whatever reason.
Change-Id: Ia6225eea97299a473cf50eccc6c5e7de830b1ddc
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/176
Tested-by: build bot (Jenkins)
Reviewed-by: Rudolf Marek <r.marek@assembler.cz>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/cpu/intel/model_6ex')
| -rw-r--r-- | src/cpu/intel/model_6ex/model_6ex_init.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/cpu/intel/model_6ex/model_6ex_init.c b/src/cpu/intel/model_6ex/model_6ex_init.c index eee651a207..abd9cf4bc2 100644 --- a/src/cpu/intel/model_6ex/model_6ex_init.c +++ b/src/cpu/intel/model_6ex/model_6ex_init.c @@ -30,6 +30,7 @@ #include <cpu/intel/microcode.h> #include <cpu/intel/hyperthreading.h> #include <cpu/intel/speedstep.h> +#include <cpu/intel/acpi.h> #include <cpu/x86/cache.h> #include <cpu/x86/name.h> #include <usbdebug.h> @@ -129,6 +130,19 @@ static void configure_misc(void) msr.lo |= (1 << 20); /* Lock Enhanced SpeedStep Enable */ wrmsr(IA32_MISC_ENABLE, msr); + + // set maximum CPU speed + msr = rdmsr(IA32_PERF_STS); + int busratio_max=(msr.hi >> (40-32)) & 0x1f; + + msr = rdmsr(IA32_PLATFORM_ID); + int vid_max=msr.lo & 0x3f; + + msr.lo &= ~0xffff; + msr.lo |= busratio_max << 8; + msr.lo |= vid_max; + + wrmsr(IA32_PERF_CTL, msr); } #define PIC_SENS_CFG 0x1aa |