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#ifndef __ACPI_PROCESSOR_H
#define __ACPI_PROCESSOR_H

#include <linux/kernel.h>
#include <linux/cpu.h>
#include <linux/cpuidle.h>
#include <linux/thermal.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

#define ACPI_PSD_REV0_REVISION        0    /* Support for _PSD as in ACPI 3.0 */
#define ACPI_PSD_REV0_ENTRIES        5

#define ACPI_TSD_REV0_REVISION        0    /* Support for _PSD as in ACPI 3.0 */
#define ACPI_TSD_REV0_ENTRIES        5
/*
 * Types of coordination defined in ACPI 3.0. Same macros can be used across
 * P, C and T states
 */
#define DOMAIN_COORD_TYPE_SW_ALL    0xfc
#define DOMAIN_COORD_TYPE_SW_ANY    0xfd
#define DOMAIN_COORD_TYPE_HW_ALL    0xfe

#define ACPI_CSTATE_SYSTEMIO    0
#define ACPI_CSTATE_FFH        1
#define ACPI_CSTATE_HALT    2

#define ACPI_CX_DESC_LEN    32

/* Power Management */

struct acpi_processor_cx;

struct acpi_power_register {
    u8 descriptor;
    u16 length;
    u8 space_id;
    u8 bit_width;
    u8 bit_offset;
    u8 access_size;
    u64 address;
} __attribute__ ((packed));

struct acpi_processor_cx {
    u8 valid;
    u8 type;
    u32 address;
    u8 entry_method;
    u8 index;
    u32 latency;
    u32 latency_ticks;
    u32 power;
    u32 usage;
    u64 time;
    u8 bm_sts_skip;
    char desc[ACPI_CX_DESC_LEN];
};

struct acpi_processor_power {
    struct cpuidle_device dev;
    struct acpi_processor_cx *state;
    unsigned long bm_check_timestamp;
    u32 default_state;
    int count;
    struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
    int timer_broadcast_on_state;
};

/* Performance Management */

struct acpi_psd_package {
    u64 num_entries;
    u64 revision;
    u64 domain;
    u64 coord_type;
    u64 num_processors;
} __attribute__ ((packed));

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 {
    u64 core_frequency;    /* megahertz */
    u64 power;    /* milliWatts */
    u64 transition_latency;    /* microseconds */
    u64 bus_master_latency;    /* microseconds */
    u64 control;    /* control value */
    u64 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;
    struct acpi_psd_package domain_info;
    cpumask_var_t shared_cpu_map;
    unsigned int shared_type;
};

/* Throttling Control */

struct acpi_tsd_package {
    u64 num_entries;
    u64 revision;
    u64 domain;
    u64 coord_type;
    u64 num_processors;
} __attribute__ ((packed));

struct acpi_ptc_register {
    u8 descriptor;
    u16 length;
    u8 space_id;
    u8 bit_width;
    u8 bit_offset;
    u8 reserved;
    u64 address;
} __attribute__ ((packed));

struct acpi_processor_tx_tss {
    u64 freqpercentage;    /* */
    u64 power;    /* milliWatts */
    u64 transition_latency;    /* microseconds */
    u64 control;    /* control value */
    u64 status;    /* success indicator */
};
struct acpi_processor_tx {
    u16 power;
    u16 performance;
};

struct acpi_processor;
struct acpi_processor_throttling {
    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_tx_tss *states_tss;
    struct acpi_tsd_package domain_info;
    cpumask_var_t shared_cpu_map;
    int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
    int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
                          int state, bool force);

    u32 address;
    u8 duty_offset;
    u8 duty_width;
    u8 tsd_valid_flag;
    unsigned int shared_type;
    struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
};

/* Limit Interface */

struct acpi_processor_lx {
    int px;            /* performance 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;
    u8 bm_rld_set:1;
};

struct acpi_processor {
    acpi_handle handle;
    u32 acpi_id;
    u32 id;
    u32 pblk;
    int performance_platform_limit;
    int throttling_platform_limit;
    /* 0 - states 0..n-th state available */

    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;
    struct thermal_cooling_device *cdev;
};

struct acpi_processor_errata {
    u8 smp;
    struct {
        u8 throttle:1;
        u8 fdma:1;
        u8 reserved:6;
        u32 bmisx;
    } piix4;
};

extern int acpi_processor_preregister_performance(struct
                          acpi_processor_performance
                          __percpu *performance);

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 */
DECLARE_PER_CPU(struct acpi_processor *, processors);
extern struct acpi_processor_errata errata;

#ifdef ARCH_HAS_POWER_INIT
void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
                    unsigned int cpu);
int acpi_processor_ffh_cstate_probe(unsigned int cpu,
                    struct acpi_processor_cx *cx,
                    struct acpi_power_register *reg);
void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
#else
static inline void acpi_processor_power_init_bm_check(struct
                              acpi_processor_flags
                              *flags, unsigned int cpu)
{
    flags->bm_check = 1;
    return;
}
static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
                          struct acpi_processor_cx *cx,
                          struct acpi_power_register
                          *reg)
{
    return -1;
}
static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
                           *cstate)
{
    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, int event_flag);
extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
#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,
                                int event_flag)
{
    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;
}
static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
{
    return -ENODEV;
}

#endif                /* CONFIG_CPU_FREQ */

/* in processor_core.c */
void acpi_processor_set_pdc(acpi_handle handle);
int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);

/* in processor_throttling.c */
int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
int acpi_processor_get_throttling_info(struct acpi_processor *pr);
extern int acpi_processor_set_throttling(struct acpi_processor *pr,
                     int state, bool force);
/*
 * Reevaluate whether the T-state is invalid after one cpu is
 * onlined/offlined. In such case the flags.throttling will be updated.
 */
extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
            unsigned long action);
extern const struct file_operations acpi_processor_throttling_fops;
extern void acpi_processor_throttling_init(void);
/* 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);
int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
int acpi_processor_resume(struct acpi_device * device);
extern struct cpuidle_driver acpi_idle_driver;

/* in processor_thermal.c */
int acpi_processor_get_limit_info(struct acpi_processor *pr);
extern struct thermal_cooling_device_ops processor_cooling_ops;
#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
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