diff options
Diffstat (limited to 'src/soc/amd/common/block')
| -rw-r--r-- | src/soc/amd/common/block/cpu/Kconfig | 6 | ||||
| -rw-r--r-- | src/soc/amd/common/block/cpu/tsc/Makefile.inc | 5 | ||||
| -rw-r--r-- | src/soc/amd/common/block/cpu/tsc/cpufreq_15_16.c | 32 |
3 files changed, 43 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/cpu/Kconfig b/src/soc/amd/common/block/cpu/Kconfig index 391e1e5b35..056e133f41 100644 --- a/src/soc/amd/common/block/cpu/Kconfig +++ b/src/soc/amd/common/block/cpu/Kconfig @@ -39,6 +39,12 @@ config ACPI_CPU_STRING endif # SOC_AMD_COMMON_BLOCK_NONCAR +config SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM15H_16H + bool + help + Select this option to include code to calculate the CPU frequency + from the P state MSR values on AMD CPU families 15h and 16h. + config SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM17H_19H bool help diff --git a/src/soc/amd/common/block/cpu/tsc/Makefile.inc b/src/soc/amd/common/block/cpu/tsc/Makefile.inc index 6176023223..77bdf77886 100644 --- a/src/soc/amd/common/block/cpu/tsc/Makefile.inc +++ b/src/soc/amd/common/block/cpu/tsc/Makefile.inc @@ -1,17 +1,22 @@ ## SPDX-License-Identifier: GPL-2.0-only +bootblock-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM15H_16H) += cpufreq_15_16.c bootblock-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM17H_19H) += cpufreq_17_19.c bootblock-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM1AH) += cpufreq_1a.c +verstage_x86-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM15H_16H) += cpufreq_15_16.c verstage_x86-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM17H_19H) += cpufreq_17_19.c verstage_x86-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM1AH) += cpufreq_1a.c +romstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM15H_16H) += cpufreq_15_16.c romstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM17H_19H) += cpufreq_17_19.c romstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM1AH) += cpufreq_1a.c +ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM15H_16H) += cpufreq_15_16.c ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM17H_19H) += cpufreq_17_19.c ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM1AH) += cpufreq_1a.c +smm-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM15H_16H) += cpufreq_15_16.c smm-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM17H_19H) += cpufreq_17_19.c smm-$(CONFIG_SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM1AH) += cpufreq_1a.c diff --git a/src/soc/amd/common/block/cpu/tsc/cpufreq_15_16.c b/src/soc/amd/common/block/cpu/tsc/cpufreq_15_16.c new file mode 100644 index 0000000000..579c2f8354 --- /dev/null +++ b/src/soc/amd/common/block/cpu/tsc/cpufreq_15_16.c @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <amdblocks/cpu.h> +#include <console/console.h> +#include <soc/msr.h> +#include <types.h> + +#define PSTATE_DEF_FREQ_DIV_MAX 4 +#define PSTATE_DEF_CORE_FREQ_BASE 100 +#define PSTATE_DEF_CORE_FREQ_ID_OFFSET 0x10 + +uint32_t get_pstate_core_freq(union pstate_msr pstate_reg) +{ + uint32_t core_freq, core_freq_mul, core_freq_div; + + /* Core frequency multiplier */ + core_freq_mul = pstate_reg.cpu_fid_0_5; + + /* Core frequency divisor ID */ + core_freq_div = pstate_reg.cpu_dfs_id; + + if (core_freq_div > PSTATE_DEF_FREQ_DIV_MAX) { + printk(BIOS_WARNING, "Undefined core_freq_div %x used. Force to lowest " + "divider.\n", core_freq_div); + core_freq_div = 0; + } + + core_freq = (PSTATE_DEF_CORE_FREQ_BASE * + (core_freq_mul + PSTATE_DEF_CORE_FREQ_ID_OFFSET)) / (1 << core_freq_div); + + return core_freq; +} |