These functions are the same on modern Intel CPUs, so use common code to set them.
Signed-off-by: Simon Glass sjg@chromium.org ---
arch/x86/cpu/broadwell/cpu.c | 7 ++---- arch/x86/cpu/broadwell/cpu_full.c | 9 ------- arch/x86/cpu/intel_common/cpu.c | 20 +++++++++++++++ arch/x86/cpu/ivybridge/model_206ax.c | 25 +++++++------------ arch/x86/cpu/ivybridge/northbridge.c | 2 +- .../include/asm/arch-ivybridge/model_206ax.h | 2 +- arch/x86/include/asm/cpu_common.h | 18 +++++++++++++ 7 files changed, 51 insertions(+), 32 deletions(-)
diff --git a/arch/x86/cpu/broadwell/cpu.c b/arch/x86/cpu/broadwell/cpu.c index 586a2e8f05a..55a7439f1c1 100644 --- a/arch/x86/cpu/broadwell/cpu.c +++ b/arch/x86/cpu/broadwell/cpu.c @@ -41,12 +41,9 @@ int arch_cpu_init_dm(void)
void set_max_freq(void) { - msr_t msr, perf_ctl, platform_info; + msr_t msr, perf_ctl;
- /* Check for configurable TDP option */ - platform_info = msr_read(MSR_PLATFORM_INFO); - - if ((platform_info.hi >> 1) & 3) { + if (cpu_config_tdp_levels()) { /* Set to nominal TDP ratio */ msr = msr_read(MSR_CONFIG_TDP_NOMINAL); perf_ctl.lo = (msr.lo & 0xff) << 8; diff --git a/arch/x86/cpu/broadwell/cpu_full.c b/arch/x86/cpu/broadwell/cpu_full.c index 58cc2f362cc..169b5b02a6a 100644 --- a/arch/x86/cpu/broadwell/cpu_full.c +++ b/arch/x86/cpu/broadwell/cpu_full.c @@ -329,15 +329,6 @@ static int bsp_init_before_ap_bringup(struct udevice *dev) return 0; }
-static int cpu_config_tdp_levels(void) -{ - msr_t platform_info; - - /* Bits 34:33 indicate how many levels supported */ - platform_info = msr_read(MSR_PLATFORM_INFO); - return (platform_info.hi >> 1) & 3; -} - static void set_max_ratio(void) { msr_t msr, perf_ctl; diff --git a/arch/x86/cpu/intel_common/cpu.c b/arch/x86/cpu/intel_common/cpu.c index 7d0ed73b4b6..1898903853f 100644 --- a/arch/x86/cpu/intel_common/cpu.c +++ b/arch/x86/cpu/intel_common/cpu.c @@ -145,3 +145,23 @@ int cpu_configure_thermal_target(struct udevice *dev)
return 0; } + +void cpu_set_perf_control(uint clk_ratio) +{ + msr_t perf_ctl; + + perf_ctl.lo = (clk_ratio & 0xff) << 8; + perf_ctl.hi = 0; + msr_write(MSR_IA32_PERF_CTL, perf_ctl); + debug("CPU: frequency set to %d MHz\n", clk_ratio * INTEL_BCLK_MHZ); +} + +bool cpu_config_tdp_levels(void) +{ + msr_t platform_info; + + /* Bits 34:33 indicate how many levels supported */ + platform_info = msr_read(MSR_PLATFORM_INFO); + + return ((platform_info.hi >> 1) & 3) != 0; +} diff --git a/arch/x86/cpu/ivybridge/model_206ax.c b/arch/x86/cpu/ivybridge/model_206ax.c index 3177ba3297f..2c8cedbaea2 100644 --- a/arch/x86/cpu/ivybridge/model_206ax.c +++ b/arch/x86/cpu/ivybridge/model_206ax.c @@ -140,19 +140,16 @@ static const u8 power_limit_time_msr_to_sec[] = { [0x11] = 128, };
-int cpu_config_tdp_levels(void) +bool cpu_ivybridge_config_tdp_levels(void) { struct cpuid_result result; - msr_t platform_info;
/* Minimum CPU revision */ result = cpuid(1); if (result.eax < IVB_CONFIG_TDP_MIN_CPUID) return 0;
- /* Bits 34:33 indicate how many levels supported */ - platform_info = msr_read(MSR_PLATFORM_INFO); - return (platform_info.hi >> 1) & 3; + return cpu_config_tdp_levels(); }
/* @@ -213,7 +210,7 @@ void set_power_limits(u8 power_limit_1_time) msr_write(MSR_PKG_POWER_LIMIT, limit);
/* Use nominal TDP values for CPUs with configurable TDP */ - if (cpu_config_tdp_levels()) { + if (cpu_ivybridge_config_tdp_levels()) { msr = msr_read(MSR_CONFIG_TDP_NOMINAL); limit.hi = 0; limit.lo = msr.lo & 0xff; @@ -329,24 +326,20 @@ static void configure_dca_cap(void)
static void set_max_ratio(void) { - msr_t msr, perf_ctl; - - perf_ctl.hi = 0; + msr_t msr; + uint ratio;
/* Check for configurable TDP option */ - if (cpu_config_tdp_levels()) { + if (cpu_ivybridge_config_tdp_levels()) { /* Set to nominal TDP ratio */ msr = msr_read(MSR_CONFIG_TDP_NOMINAL); - perf_ctl.lo = (msr.lo & 0xff) << 8; + ratio = msr.lo & 0xff; } else { /* Platform Info bits 15:8 give max ratio */ msr = msr_read(MSR_PLATFORM_INFO); - perf_ctl.lo = msr.lo & 0xff00; + ratio = (msr.lo & 0xff00) >> 8; } - msr_write(MSR_IA32_PERF_CTL, perf_ctl); - - debug("model_x06ax: frequency set to %d\n", - ((perf_ctl.lo >> 8) & 0xff) * INTEL_BCLK_MHZ); + cpu_set_perf_control(ratio); }
static void set_energy_perf_bias(u8 policy) diff --git a/arch/x86/cpu/ivybridge/northbridge.c b/arch/x86/cpu/ivybridge/northbridge.c index a809b823b3b..0f427afcb82 100644 --- a/arch/x86/cpu/ivybridge/northbridge.c +++ b/arch/x86/cpu/ivybridge/northbridge.c @@ -141,7 +141,7 @@ static void northbridge_init(struct udevice *dev, int rev) * CPUs with configurable TDP also need power limits set * in MCHBAR. Use same values from MSR_PKG_POWER_LIMIT. */ - if (cpu_config_tdp_levels()) { + if (cpu_ivybridge_config_tdp_levels()) { msr_t msr = msr_read(MSR_PKG_POWER_LIMIT);
writel(msr.lo, MCHBAR_REG(0x59A0)); diff --git a/arch/x86/include/asm/arch-ivybridge/model_206ax.h b/arch/x86/include/asm/arch-ivybridge/model_206ax.h index 10caaa24226..4839ebc3124 100644 --- a/arch/x86/include/asm/arch-ivybridge/model_206ax.h +++ b/arch/x86/include/asm/arch-ivybridge/model_206ax.h @@ -58,6 +58,6 @@
/* Configure power limits for turbo mode */ void set_power_limits(u8 power_limit_1_time); -int cpu_config_tdp_levels(void); +bool cpu_ivybridge_config_tdp_levels(void);
#endif diff --git a/arch/x86/include/asm/cpu_common.h b/arch/x86/include/asm/cpu_common.h index 3d093021ae6..e6a2a0eb3e5 100644 --- a/arch/x86/include/asm/cpu_common.h +++ b/arch/x86/include/asm/cpu_common.h @@ -1,5 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* + * Common code for Intel CPUs + * * Copyright (c) 2016 Google, Inc */
@@ -56,4 +58,20 @@ int cpu_intel_get_info(struct cpu_info *info, int bclk_mz); */ int cpu_configure_thermal_target(struct udevice *dev);
+/** + * cpu_set_perf_control() - Set the nominal CPU clock speed + * + * This sets the clock speed as a muiltiplier of BCLK + * + * @clk_ratio: Ratio to use + */ +void cpu_set_perf_control(uint clk_ratio); + +/** + * cpu_config_tdp_levels() - Check for configurable TDP option + * + * @return true if the CPU has configurable TDP (Thermal-desgn power) + */ +bool cpu_config_tdp_levels(void); + #endif