diff options
| author | Werner Zeh <werner.zeh@siemens.com> | 2018-11-22 15:10:18 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-11-23 11:28:52 +0000 |
| commit | 6b522c31aa55f1e09b63843e183c0f6f298a5605 (patch) | |
| tree | 6fdc7a84cbbc18ffdd8462aed58fd774c2eca8f5 /src/soc | |
| parent | 697faf0d5fa1e4a8c221f083ab4b469d4a4b57d2 (diff) | |
intelblocks/cpu: Fix wrong comment for P_Req field in PERF_CTL MSR
The mentioned bits 14:8 are wrong as the functions always write
bits 15:8. What happens is visible in the written code. There is no need
for an extra comment.
Change-Id: I59b4d24d01a0a8fa74912f9754e7bbb217ca269d
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/29798
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/common/block/cpu/cpulib.c | 10 | ||||
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/cpulib.h | 10 |
2 files changed, 10 insertions, 10 deletions
diff --git a/src/soc/intel/common/block/cpu/cpulib.c b/src/soc/intel/common/block/cpu/cpulib.c index f2142d93cc..d18b50cb3f 100644 --- a/src/soc/intel/common/block/cpu/cpulib.c +++ b/src/soc/intel/common/block/cpu/cpulib.c @@ -34,7 +34,7 @@ #include <stdint.h> /* - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with + * Set PERF_CTL MSR (0x199) P_Req with * Turbo Ratio which is the Maximum Ratio. */ void cpu_set_max_ratio(void) @@ -86,7 +86,7 @@ int cpu_config_tdp_levels(void) * 23:16 - MAX_TURBO_3_CORES * 31:24 - MAX_TURBO_4_CORES * - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value. + * Set PERF_CTL MSR (0x199) P_Req with that value. */ void cpu_set_p_state_to_turbo_ratio(void) { @@ -106,7 +106,7 @@ void cpu_set_p_state_to_turbo_ratio(void) * TDP level ratio to be used for specific processor (in units * of 100MHz). * - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value. + * Set PERF_CTL MSR (0x199) P_Req with that value. */ void cpu_set_p_state_to_nominal_tdp_ratio(void) { @@ -125,7 +125,7 @@ void cpu_set_p_state_to_nominal_tdp_ratio(void) * PLATFORM_INFO MSR (0xCE) Bits 15:8 tells * MAX_NON_TURBO_LIM_RATIO. * - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value. + * Set PERF_CTL MSR (0x199) P_Req with that value. */ void cpu_set_p_state_to_max_non_turbo_ratio(void) { @@ -142,7 +142,7 @@ void cpu_set_p_state_to_max_non_turbo_ratio(void) } /* - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with the value + * Set PERF_CTL MSR (0x199) P_Req with the value * for maximum efficiency. This value is reported in PLATFORM_INFO MSR (0xCE) * in Bits 47:40 and is extracted with cpu_get_min_ratio(). */ diff --git a/src/soc/intel/common/block/include/intelblocks/cpulib.h b/src/soc/intel/common/block/include/intelblocks/cpulib.h index 0d51146752..5cea96e409 100644 --- a/src/soc/intel/common/block/include/intelblocks/cpulib.h +++ b/src/soc/intel/common/block/include/intelblocks/cpulib.h @@ -20,7 +20,7 @@ #include <stdint.h> /* - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with + * Set PERF_CTL MSR (0x199) P_Req with * Turbo Ratio which is the Maximum Ratio. */ void cpu_set_max_ratio(void); @@ -52,7 +52,7 @@ int cpu_config_tdp_levels(void); * 23:16 - MAX_TURBO_3_CORES * 31:24 - MAX_TURBO_4_CORES * - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value. + * Set PERF_CTL MSR (0x199) P_Req with that value. */ void cpu_set_p_state_to_turbo_ratio(void); @@ -61,7 +61,7 @@ void cpu_set_p_state_to_turbo_ratio(void); * TDP level ratio to be used for specific processor (in units * of 100MHz). * - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value. + * Set PERF_CTL MSR (0x199) P_Req with that value. */ void cpu_set_p_state_to_nominal_tdp_ratio(void); @@ -69,12 +69,12 @@ void cpu_set_p_state_to_nominal_tdp_ratio(void); * PLATFORM_INFO MSR (0xCE) Bits 15:8 tells * MAX_NON_TURBO_LIM_RATIO. * - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value. + * Set PERF_CTL MSR (0x199) P_Req with that value. */ void cpu_set_p_state_to_max_non_turbo_ratio(void); /* - * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with the value + * Set PERF_CTL MSR (0x199) P_Req with the value * for maximum efficiency. This value is reported in PLATFORM_INFO MSR (0xCE) * in Bits 47:40 and is extracted with cpu_get_min_ratio(). */ |