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soc/intel/cpulib: Factor out IA32_PERF_CTL (0x199) MSR code 

This patch replaces multiple IA32_PERF_CTL programming with single
helper function.

TEST=Build and boot WHL and CML platform.

Change-Id: I212daa61aa11191dd832630461b517d3dbedd6e1
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32281
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Subrata Banik 2019-04-10 11:36:58 +05:30
parent c47eda0e6b
commit 459df6697a
1 changed files with 12 additions and 12 deletions
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24
src/soc/intel/common/block/cpu/cpulib.c
View File

@ -73,6 +73,13 @@ int cpu_config_tdp_levels(void)
return (platform_info.hi >> 1) & 3;
}
static void set_perf_control_msr(msr_t msr)
{
wrmsr(IA32_PERF_CTL, msr);
printk(BIOS_DEBUG, "CPU: frequency set to %d MHz\n",
((msr.lo >> 8) & 0xff) * CONFIG_CPU_BCLK_MHZ);
}
/*
* TURBO_RATIO_LIMIT MSR (0x1AD) Bits 31:0 indicates the
* factory configured values for of 1-core, 2-core, 3-core
@ -93,9 +100,7 @@ void cpu_set_p_state_to_turbo_ratio(void)
perf_ctl.lo = (msr.lo & 0xff) << 8;
perf_ctl.hi = 0;
wrmsr(IA32_PERF_CTL, perf_ctl);
printk(BIOS_DEBUG, "CPU: frequency set to %d MHz\n",
((perf_ctl.lo >> 8) & 0xff) * CONFIG_CPU_BCLK_MHZ);
set_perf_control_msr(perf_ctl);
}
/*
@ -113,9 +118,7 @@ void cpu_set_p_state_to_nominal_tdp_ratio(void)
perf_ctl.lo = (msr.lo & 0xff) << 8;
perf_ctl.hi = 0;
wrmsr(IA32_PERF_CTL, perf_ctl);
printk(BIOS_DEBUG, "CPU: frequency set to %d MHz\n",
((perf_ctl.lo >> 8) & 0xff) * CONFIG_CPU_BCLK_MHZ);
set_perf_control_msr(perf_ctl);
}
/*
@ -133,9 +136,7 @@ void cpu_set_p_state_to_max_non_turbo_ratio(void)
perf_ctl.lo = msr.lo & 0xff00;
perf_ctl.hi = 0;
wrmsr(IA32_PERF_CTL, perf_ctl);
printk(BIOS_DEBUG, "CPU: frequency set to %d MHz\n",
((perf_ctl.lo >> 8) & 0xff) * CONFIG_CPU_BCLK_MHZ);
set_perf_control_msr(perf_ctl);
}
/*
@ -152,9 +153,8 @@ void cpu_set_p_state_to_min_clock_ratio(void)
min_ratio = cpu_get_min_ratio();
perf_ctl.lo = (min_ratio << 8) & 0xff00;
perf_ctl.hi = 0;
wrmsr(IA32_PERF_CTL, perf_ctl);
printk(BIOS_DEBUG, "CPU: frequency set to %u MHz\n",
(min_ratio * CONFIG_CPU_BCLK_MHZ));
set_perf_control_msr(perf_ctl);
}
/*