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- #ifndef __ACPI_PROCESSOR_H
- #define __ACPI_PROCESSOR_H
-
- #include <linux/kernel.h>
-
- #include <asm/acpi.h>
-
- #define ACPI_PROCESSOR_BUSY_METRIC 10
-
- #define ACPI_PROCESSOR_MAX_POWER 8
- #define ACPI_PROCESSOR_MAX_C2_LATENCY 100
- #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
-
- #define ACPI_PROCESSOR_MAX_THROTTLING 16
- #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
- #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
-
- #define ACPI_PDC_REVISION_ID 0x1
-
- /* Power Management */
-
- struct acpi_processor_cx;
-
- struct acpi_power_register {
- u8 descriptor;
- u16 length;
- u8 space_id;
- u8 bit_width;
- u8 bit_offset;
- u8 reserved;
- u64 address;
- } __attribute__ ((packed));
-
- struct acpi_processor_cx_policy {
- u32 count;
- struct acpi_processor_cx *state;
- struct {
- u32 time;
- u32 ticks;
- u32 count;
- u32 bm;
- } threshold;
- };
-
- struct acpi_processor_cx {
- u8 valid;
- u8 type;
- u32 address;
- u32 latency;
- u32 latency_ticks;
- u32 power;
- u32 usage;
- struct acpi_processor_cx_policy promotion;
- struct acpi_processor_cx_policy demotion;
- };
-
- struct acpi_processor_power {
- struct acpi_processor_cx *state;
- unsigned long bm_check_timestamp;
- u32 default_state;
- u32 bm_activity;
- int count;
- struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
- };
-
- /* Performance Management */
-
- struct acpi_pct_register {
- u8 descriptor;
- u16 length;
- u8 space_id;
- u8 bit_width;
- u8 bit_offset;
- u8 reserved;
- u64 address;
- } __attribute__ ((packed));
-
- struct acpi_processor_px {
- acpi_integer core_frequency; /* megahertz */
- acpi_integer power; /* milliWatts */
- acpi_integer transition_latency; /* microseconds */
- acpi_integer bus_master_latency; /* microseconds */
- acpi_integer control; /* control value */
- acpi_integer status; /* success indicator */
- };
-
- struct acpi_processor_performance {
- unsigned int state;
- unsigned int platform_limit;
- struct acpi_pct_register control_register;
- struct acpi_pct_register status_register;
- unsigned int state_count;
- struct acpi_processor_px *states;
-
- };
-
- /* Throttling Control */
-
- struct acpi_processor_tx {
- u16 power;
- u16 performance;
- };
-
- struct acpi_processor_throttling {
- int state;
- u32 address;
- u8 duty_offset;
- u8 duty_width;
- int state_count;
- struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
- };
-
- /* Limit Interface */
-
- struct acpi_processor_lx {
- int px; /* performace state */
- int tx; /* throttle level */
- };
-
- struct acpi_processor_limit {
- struct acpi_processor_lx state; /* current limit */
- struct acpi_processor_lx thermal; /* thermal limit */
- struct acpi_processor_lx user; /* user limit */
- };
-
- struct acpi_processor_flags {
- u8 power:1;
- u8 performance:1;
- u8 throttling:1;
- u8 limit:1;
- u8 bm_control:1;
- u8 bm_check:1;
- u8 has_cst:1;
- u8 power_setup_done:1;
- };
-
- struct acpi_processor {
- acpi_handle handle;
- u32 acpi_id;
- u32 id;
- u32 pblk;
- int performance_platform_limit;
- struct acpi_processor_flags flags;
- struct acpi_processor_power power;
- struct acpi_processor_performance *performance;
- struct acpi_processor_throttling throttling;
- struct acpi_processor_limit limit;
-
- /* the _PDC objects for this processor, if any */
- struct acpi_object_list *pdc;
- };
-
- struct acpi_processor_errata {
- u8 smp;
- struct {
- u8 throttle:1;
- u8 fdma:1;
- u8 reserved:6;
- u32 bmisx;
- } piix4;
- };
-
- extern int acpi_processor_register_performance(struct acpi_processor_performance
- *performance, unsigned int cpu);
- extern void acpi_processor_unregister_performance(struct
- acpi_processor_performance
- *performance,
- unsigned int cpu);
-
- /* note: this locks both the calling module and the processor module
- if a _PPC object exists, rmmod is disallowed then */
- int acpi_processor_notify_smm(struct module *calling_module);
-
- /* for communication between multiple parts of the processor kernel module */
- extern struct acpi_processor *processors[NR_CPUS];
- extern struct acpi_processor_errata errata;
-
- void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
-
- #ifdef ARCH_HAS_POWER_INIT
- void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
- unsigned int cpu);
- #else
- static inline void acpi_processor_power_init_bm_check(struct
- acpi_processor_flags
- *flags, unsigned int cpu)
- {
- flags->bm_check = 1;
- return;
- }
- #endif
-
- /* in processor_perflib.c */
-
- #ifdef CONFIG_CPU_FREQ
- void acpi_processor_ppc_init(void);
- void acpi_processor_ppc_exit(void);
- int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
- #else
- static inline void acpi_processor_ppc_init(void)
- {
- return;
- }
- static inline void acpi_processor_ppc_exit(void)
- {
- return;
- }
- static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
- {
- static unsigned int printout = 1;
- if (printout) {
- printk(KERN_WARNING
- "Warning: Processor Platform Limit event detected, but not handled.\n");
- printk(KERN_WARNING
- "Consider compiling CPUfreq support into your kernel.\n");
- printout = 0;
- }
- return 0;
- }
- #endif /* CONFIG_CPU_FREQ */
-
- /* in processor_throttling.c */
- int acpi_processor_get_throttling_info(struct acpi_processor *pr);
- int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
- extern struct file_operations acpi_processor_throttling_fops;
-
- /* in processor_idle.c */
- int acpi_processor_power_init(struct acpi_processor *pr,
- struct acpi_device *device);
- int acpi_processor_cst_has_changed(struct acpi_processor *pr);
- int acpi_processor_power_exit(struct acpi_processor *pr,
- struct acpi_device *device);
-
- /* in processor_thermal.c */
- int acpi_processor_get_limit_info(struct acpi_processor *pr);
- extern struct file_operations acpi_processor_limit_fops;
-
- #ifdef CONFIG_CPU_FREQ
- void acpi_thermal_cpufreq_init(void);
- void acpi_thermal_cpufreq_exit(void);
- #else
- static inline void acpi_thermal_cpufreq_init(void)
- {
- return;
- }
- static inline void acpi_thermal_cpufreq_exit(void)
- {
- return;
- }
- #endif
-
- #endif
-