diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2012-06-25 09:53:58 -0700 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2012-07-24 23:39:58 +0200 |
| commit | 4e4320f524a4695b5987e6bbffcfc48af89dac26 (patch) | |
| tree | 6a641f388b940f4d287e3ad0b563423b8e358e11 /src/cpu | |
| parent | 77dbbac7e710c279c8208a5e5f5e766ef4565524 (diff) | |
CPU: Update ivybridge PP1 current limit value
The BWG says ivybridge current limit for PP1 is 50A.
Verify the PP1 current limit value on link device:
> echo $(( ( $(rdmsr 0 0x602) & 0x1fff ) >> 3 ))
50
Change-Id: I946269d21ef605f2525fe03993f569d69128294b
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1305
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/intel/model_206ax/model_206ax.h | 3 | ||||
| -rw-r--r-- | src/cpu/intel/model_206ax/model_206ax_init.c | 5 |
2 files changed, 6 insertions, 2 deletions
diff --git a/src/cpu/intel/model_206ax/model_206ax.h b/src/cpu/intel/model_206ax/model_206ax.h index d482ff0108..fbd57a5c19 100644 --- a/src/cpu/intel/model_206ax/model_206ax.h +++ b/src/cpu/intel/model_206ax/model_206ax.h @@ -75,7 +75,8 @@ #define MSR_PP0_CURRENT_CONFIG 0x601 #define PP0_CURRENT_LIMIT (112 << 3) /* 112 A */ #define MSR_PP1_CURRENT_CONFIG 0x602 -#define PP1_CURRENT_LIMIT (35 << 3) /* 35 A */ +#define PP1_CURRENT_LIMIT_SNB (35 << 3) /* 35 A */ +#define PP1_CURRENT_LIMIT_IVB (50 << 3) /* 50 A */ #define MSR_PKG_POWER_SKU_UNIT 0x606 #define MSR_PKG_POWER_SKU 0x614 #define MSR_PP0_POWER_LIMIT 0x638 diff --git a/src/cpu/intel/model_206ax/model_206ax_init.c b/src/cpu/intel/model_206ax/model_206ax_init.c index 0958fe366e..08757d138a 100644 --- a/src/cpu/intel/model_206ax/model_206ax_init.c +++ b/src/cpu/intel/model_206ax/model_206ax_init.c @@ -311,7 +311,10 @@ static void configure_c_states(void) /* Secondary Plane Current Limit */ msr = rdmsr(MSR_PP1_CURRENT_CONFIG); msr.lo &= ~0x1fff; - msr.lo |= PP1_CURRENT_LIMIT; + if (cpuid_eax(1) >= 0x30600) + msr.lo |= PP1_CURRENT_LIMIT_IVB; + else + msr.lo |= PP1_CURRENT_LIMIT_SNB; wrmsr(MSR_PP1_CURRENT_CONFIG, msr); } |