1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <acpi/acpi_pm.h>
4 #include <acpi/acpigen.h>
5 #include <amdblocks/cppc.h>
6 #include <cpu/cpu.h>
7 #include <soc/msr.h>
8 #include <types.h>
9
cpu_init_cppc_config(struct cppc_config * config,u32 version)10 static void cpu_init_cppc_config(struct cppc_config *config, u32 version)
11 {
12 uint32_t lowest_freq_mhz;
13 uint32_t nominal_freq_mhz;
14
15 config->version = version;
16
17 config->entries[CPPC_HIGHEST_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_HIGHEST_PERF, 8);
18 config->entries[CPPC_NOMINAL_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_NOMINAL_PERF, 8);
19 config->entries[CPPC_LOWEST_NONL_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_LOW_NON_LIN_PERF, 8);
20 config->entries[CPPC_LOWEST_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_LOWEST_PERF, 8);
21 config->entries[CPPC_GUARANTEED_PERF] = CPPC_UNSUPPORTED;
22 config->entries[CPPC_DESIRED_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_DES_PERF, 8);
23 config->entries[CPPC_MIN_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_MIN_PERF, 8);
24 config->entries[CPPC_MAX_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_MAX_PERF, 8);
25 config->entries[CPPC_PERF_REDUCE_TOLERANCE] = CPPC_UNSUPPORTED;
26 config->entries[CPPC_TIME_WINDOW] = CPPC_UNSUPPORTED;
27 config->entries[CPPC_COUNTER_WRAP] = CPPC_UNSUPPORTED;
28 config->entries[CPPC_REF_PERF_COUNTER] = CPPC_REG_MSR(MSR_MAX_PERFORMANCE_FREQUENCY_CLOCK_COUNT, 0, 64);
29 config->entries[CPPC_DELIVERED_PERF_COUNTER] = CPPC_REG_MSR(MSR_ACTUAL_PERFORMANCE_FREQUENCY_CLOCK_COUNT, 0, 64);
30 config->entries[CPPC_PERF_LIMITED] = CPPC_REG_MSR(MSR_CPPC_STATUS, 0, 2);
31 config->entries[CPPC_ENABLE] = CPPC_REG_MSR(MSR_CPPC_ENABLE, 0, 1);
32
33 if (version < 2)
34 return;
35
36 config->entries[CPPC_AUTO_SELECT] = CPPC_DWORD(1);
37 config->entries[CPPC_AUTO_ACTIVITY_WINDOW] = CPPC_UNSUPPORTED;
38 config->entries[CPPC_PERF_PREF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_ENERGY_PERF_PREF, 8);
39 config->entries[CPPC_REF_PERF] = CPPC_UNSUPPORTED;
40
41 if (version < 3)
42 return;
43
44 config->entries[CPPC_LOWEST_FREQ] =
45 get_ccx_cppc_min_frequency(&lowest_freq_mhz) == CB_SUCCESS ?
46 CPPC_DWORD(lowest_freq_mhz) : CPPC_UNSUPPORTED;
47 config->entries[CPPC_NOMINAL_FREQ] =
48 get_ccx_cppc_nom_frequency(&nominal_freq_mhz) == CB_SUCCESS ?
49 CPPC_DWORD(nominal_freq_mhz) : CPPC_UNSUPPORTED;
50 }
51
generate_cppc_entries(unsigned int core_id)52 void generate_cppc_entries(unsigned int core_id)
53 {
54 /* Generate GCPC package in first logical core */
55 if (core_id == 0) {
56 struct cppc_config cppc_config;
57 cpu_init_cppc_config(&cppc_config, CPPC_VERSION_3);
58 acpigen_write_CPPC_package(&cppc_config);
59 }
60
61 /* Write _CPC entry for each logical core */
62 acpigen_write_CPPC_method();
63 }
64