mirror of
https://github.com/libretro/RetroArch.git
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109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2021 - David Guillen Fandos
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _MISC_CPUFREQ_H
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#define _MISC_CPUFREQ_H
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#include <stdint.h>
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RETRO_BEGIN_DECLS
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#define MAX_GOV_STRLEN 32
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/* Events from Frontend to the driver to drive policies */
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enum cpu_scaling_event
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{
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CPUSCALING_EVENT_FOCUS_CORE,
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CPUSCALING_EVENT_FOCUS_MENU,
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CPUSCALING_EVENT_FOCUS_SCREENSAVER
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};
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/* Scaling mode selected by the user */
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enum cpu_scaling_mode
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{
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CPUSCALING_MANAGED_PERFORMANCE = 0, /* Performance while running core */
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CPUSCALING_MANAGED_PER_CONTEXT, /* Policies for core, menu, etc. */
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CPUSCALING_MAX_PERFORMANCE, /* Performance (Max Freq) */
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CPUSCALING_MIN_POWER, /* Use Powersave governor */
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CPUSCALING_BALANCED, /* Uses schedutil/ondemand */
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CPUSCALING_MANUAL /* Can manually tweak stuff */
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};
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typedef struct cpu_scaling_opts
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{
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/* Max/Min frequencies */
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uint32_t min_freq, max_freq;
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/* Options for CPUSCALING_POLICY_PER_CONTEXT */
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char main_policy[MAX_GOV_STRLEN];
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char menu_policy[MAX_GOV_STRLEN];
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} cpu_scaling_opts_t;
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typedef struct cpu_scaling_driver
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{
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/* Policy number in the sysfs tree */
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unsigned int policy_id;
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/* Which CPUs this scaling driver will affect */
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char *affected_cpus;
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/* Governor and available governors */
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char *scaling_governor;
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struct string_list *available_governors;
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/* Current frequency (value might be slightly old) */
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uint32_t current_frequency;
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/* Max and min frequencies, for the hardware and policy */
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uint32_t min_cpu_freq, max_cpu_freq;
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uint32_t min_policy_freq, max_policy_freq;
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/* Available frequencies table (can be NULL), ends with zero */
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uint32_t *available_freqs;
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} cpu_scaling_driver_t;
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/* Safely free all memory used by the driver */
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void cpu_scaling_driver_free(void);
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/* Signal the initialization */
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void cpu_scaling_driver_init(void);
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/* Get a list of the available cpu scaling drivers */
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cpu_scaling_driver_t **get_cpu_scaling_drivers(bool can_update);
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/* Set max and min policy cpu frequency */
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bool set_cpu_scaling_min_frequency(
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cpu_scaling_driver_t *driver, uint32_t min_freq);
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bool set_cpu_scaling_max_frequency(
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cpu_scaling_driver_t *driver, uint32_t max_freq);
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/* Calculate next/previous frequencies */
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uint32_t get_cpu_scaling_next_frequency(cpu_scaling_driver_t *driver,
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uint32_t freq, int step);
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uint32_t get_cpu_scaling_next_frequency_limit(uint32_t freq, int step);
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/* Set the scaling governor for this scaling driver */
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bool set_cpu_scaling_governor(cpu_scaling_driver_t *driver,
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const char* governor);
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/* Signal certain events that are of interest of this driver */
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void set_cpu_scaling_signal(enum cpu_scaling_event);
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/* Set the base cpufreq policy mode */
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void set_cpu_scaling_mode(enum cpu_scaling_mode mode,
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const cpu_scaling_opts_t *opts);
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/* Get the base cpufreq policy mode */
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enum cpu_scaling_mode get_cpu_scaling_mode(cpu_scaling_opts_t *opts);
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RETRO_END_DECLS
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#endif
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