diff options
Diffstat (limited to 'src/soc/amd')
| -rw-r--r-- | src/soc/amd/cezanne/cppc.c | 177 |
1 files changed, 29 insertions, 148 deletions
diff --git a/src/soc/amd/cezanne/cppc.c b/src/soc/amd/cezanne/cppc.c index 79292a4153..9d681c6ba7 100644 --- a/src/soc/amd/cezanne/cppc.c +++ b/src/soc/amd/cezanne/cppc.c @@ -13,156 +13,37 @@ */ void cpu_init_cppc_config(struct cppc_config *config, u32 version) { - acpi_addr_t msr = { - .space_id = ACPI_ADDRESS_SPACE_FIXED, - .bit_width = 8, - .bit_offset = 0, - .access_size = ACPI_ACCESS_SIZE_QWORD_ACCESS, - .addrl = 0, - .addrh = 0, - }; - static const acpi_addr_t unsupported = { - .space_id = ACPI_ADDRESS_SPACE_MEMORY, - .bit_width = 0, - .bit_offset = 0, - .access_size = ACPI_ACCESS_SIZE_UNDEFINED, - .addrl = 0, - .addrh = 0, - }; - config->version = version; - /* - * Highest Performance: - */ - msr.addrl = MSR_CPPC_CAPABILITY_1; - msr.bit_offset = SHIFT_CPPC_CAPABILITY_1_HIGHEST_PERF; - config->regs[CPPC_HIGHEST_PERF] = msr; - - /* - * Lowest Nonlinear Performance -> Most Efficient Performance: - */ - msr.bit_offset = SHIFT_CPPC_CAPABILITY_1_LOW_NON_LIN_PERF; - config->regs[CPPC_LOWEST_NONL_PERF] = msr; - - /* - * Lowest Performance: - */ - msr.bit_offset = SHIFT_CPPC_CAPABILITY_1_LOWEST_PERF; - config->regs[CPPC_LOWEST_PERF] = msr; - - /* - * Guaranteed Performance Register: - */ - config->regs[CPPC_GUARANTEED_PERF] = unsupported; - - /* - * Nominal Performance -> Maximum Non-Turbo Ratio: - */ - msr.bit_offset = SHIFT_CPPC_CAPABILITY_1_NOMINAL_PERF; - config->regs[CPPC_NOMINAL_PERF] = msr; - - /* - * Desired Performance Register: - */ - msr.addrl = MSR_CPPC_REQUEST; - msr.bit_offset = SHIFT_CPPC_REQUEST_DES_PERF; - config->regs[CPPC_DESIRED_PERF] = msr; - - /* - * Minimum Performance Register: - */ - msr.bit_offset = SHIFT_CPPC_REQUEST_MIN_PERF; - config->regs[CPPC_MIN_PERF] = msr; - - /* - * Maximum Performance Register: - */ - msr.bit_offset = SHIFT_CPPC_REQUEST_MAX_PERF; - config->regs[CPPC_MAX_PERF] = msr; - - /* - * Performance Reduction Tolerance Register: - */ - config->regs[CPPC_PERF_REDUCE_TOLERANCE] = unsupported; - - /* - * Time Window Register: - */ - config->regs[CPPC_TIME_WINDOW] = unsupported; - - /* - * Counter Wraparound Time: - */ - config->regs[CPPC_COUNTER_WRAP] = unsupported; - - /* - * Reference Performance Counter Register: - */ - msr.addrl = MSR_MAX_PERFORMANCE_FREQUENCY_CLOCK_COUNT; - msr.bit_width = 64; - msr.bit_offset = 0; - config->regs[CPPC_REF_PERF_COUNTER] = msr; - - /* - * Delivered Performance Counter Register: - */ - msr.addrl = MSR_ACTUAL_PERFORMANCE_FREQUENCY_CLOCK_COUNT; - config->regs[CPPC_DELIVERED_PERF_COUNTER] = msr; - - /* - * Performance Limited Register: - */ - msr.bit_width = 1; - msr.addrl = MSR_CPPC_STATUS; - msr.bit_offset = 1; - config->regs[CPPC_PERF_LIMITED] = msr; - - /* - * CPPC Enable Register: - */ - msr.addrl = MSR_CPPC_ENABLE; - msr.bit_offset = 0; - config->regs[CPPC_ENABLE] = msr; - - if (version >= 2) { - /* Autonomous Selection Enable is populated below */ - - /* - * Autonomous Activity Window Register - */ - config->regs[CPPC_AUTO_ACTIVITY_WINDOW] = unsupported; - - /* - * Autonomous Energy Performance Preference Register - */ - msr.addrl = MSR_CPPC_REQUEST; - msr.bit_width = 8; - msr.bit_offset = SHIFT_CPPC_REQUEST_ENERGY_PERF_PREF; - config->regs[CPPC_PERF_PREF] = msr; - - /* Reference Performance */ - config->regs[CPPC_REF_PERF] = unsupported; - - if (version >= 3) { - /* Lowest Frequency */ - config->regs[CPPC_LOWEST_FREQ] = unsupported; - /* Nominal Frequency */ - config->regs[CPPC_NOMINAL_FREQ] = unsupported; - } - - /* - * Autonomous Selection Enable = 1 - * This field is actually the first addition in version 2 but - * it's so unlike the others I'm populating it last. - */ - msr.space_id = ACPI_ADDRESS_SPACE_MEMORY; - msr.bit_width = 32; - msr.bit_offset = 0; - msr.access_size = ACPI_ACCESS_SIZE_UNDEFINED; - msr.addrl = 1; - config->regs[CPPC_AUTO_SELECT] = unsupported; - } + config->regs[CPPC_HIGHEST_PERF] = ACPI_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_HIGHEST_PERF, 8); + config->regs[CPPC_NOMINAL_PERF] = ACPI_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_NOMINAL_PERF, 8); + config->regs[CPPC_LOWEST_NONL_PERF] = ACPI_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_LOW_NON_LIN_PERF, 8); + config->regs[CPPC_LOWEST_PERF] = ACPI_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_LOWEST_PERF, 8); + config->regs[CPPC_GUARANTEED_PERF] = ACPI_REG_UNSUPPORTED; + config->regs[CPPC_DESIRED_PERF] = ACPI_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_DES_PERF, 8); + config->regs[CPPC_MIN_PERF] = ACPI_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_MIN_PERF, 8); + config->regs[CPPC_MAX_PERF] = ACPI_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_MAX_PERF, 8); + config->regs[CPPC_PERF_REDUCE_TOLERANCE] = ACPI_REG_UNSUPPORTED; + config->regs[CPPC_TIME_WINDOW] = ACPI_REG_UNSUPPORTED; + config->regs[CPPC_COUNTER_WRAP] = ACPI_REG_UNSUPPORTED; + config->regs[CPPC_REF_PERF_COUNTER] = ACPI_REG_MSR(MSR_MAX_PERFORMANCE_FREQUENCY_CLOCK_COUNT, 0, 64); + config->regs[CPPC_DELIVERED_PERF_COUNTER] = ACPI_REG_MSR(MSR_ACTUAL_PERFORMANCE_FREQUENCY_CLOCK_COUNT, 0, 64); + config->regs[CPPC_PERF_LIMITED] = ACPI_REG_MSR(MSR_CPPC_STATUS, 1, 1); + config->regs[CPPC_ENABLE] = ACPI_REG_MSR(MSR_CPPC_ENABLE, 0, 1); + + if (version < 2) + return; + + config->regs[CPPC_AUTO_SELECT] = ACPI_REG_UNSUPPORTED; + config->regs[CPPC_AUTO_ACTIVITY_WINDOW] = ACPI_REG_UNSUPPORTED; + config->regs[CPPC_PERF_PREF] = ACPI_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_ENERGY_PERF_PREF, 8); + config->regs[CPPC_REF_PERF] = ACPI_REG_UNSUPPORTED; + + if (version < 3) + return; + + config->regs[CPPC_LOWEST_FREQ] = ACPI_REG_UNSUPPORTED; + config->regs[CPPC_NOMINAL_FREQ] = ACPI_REG_UNSUPPORTED; } |