include/acpi/processor.h

   1 #ifndef __ACPI_PROCESSOR_H
   2 #define __ACPI_PROCESSOR_H
   3
   4 #include <linux/kernel.h>
   5
   6 #define ACPI_PROCESSOR_BUSY_METRIC      10
   7
   8 #define ACPI_PROCESSOR_MAX_POWER        ACPI_C_STATE_COUNT
   9 #define ACPI_PROCESSOR_MAX_C2_LATENCY   100
  10 #define ACPI_PROCESSOR_MAX_C3_LATENCY   1000
  11
  12 #define ACPI_PROCESSOR_MAX_THROTTLING   16
  13 #define ACPI_PROCESSOR_MAX_THROTTLE     250     /* 25% */
  14 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH   4
  15
  16 /* Power Management */
  17
  18 struct acpi_processor_cx_policy {
  19         u32                     count;
  20         int                     state;
  21         struct {
  22                 u32                     time;
  23                 u32                     ticks;
  24                 u32                     count;
  25                 u32                     bm;
  26         }                       threshold;
  27 };
  28
  29 struct acpi_processor_cx {
  30         u8                      valid;
  31         u32                     address;
  32         u32                     latency;
  33         u32                     latency_ticks;
  34         u32                     power;
  35         u32                     usage;
  36         struct acpi_processor_cx_policy promotion;
  37         struct acpi_processor_cx_policy demotion;
  38 };
  39
  40 struct acpi_processor_power {
  41         int                     state;
  42         int                     default_state;
  43         u32                     bm_activity;
  44         struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
  45 };
  46
  47 /* Performance Management */
  48
  49 struct acpi_pct_register {
  50         u8                      descriptor;
  51         u16                     length;
  52         u8                      space_id;
  53         u8                      bit_width;
  54         u8                      bit_offset;
  55         u8                      reserved;
  56         u64                     address;
  57 } __attribute__ ((packed));
  58
  59 struct acpi_processor_px {
  60         acpi_integer            core_frequency;         /* megahertz */
  61         acpi_integer            power;                  /* milliWatts */
  62         acpi_integer            transition_latency;     /* microseconds */
  63         acpi_integer            bus_master_latency;     /* microseconds */
  64         acpi_integer            control;                /* control value */
  65         acpi_integer            status;                 /* success indicator */
  66 };
  67
  68 #define ACPI_PDC_REVISION_ID                   0x1
  69
  70 struct acpi_processor_performance {
  71         unsigned int             state;
  72         unsigned int             platform_limit;
  73         struct acpi_pct_register control_register;
  74         struct acpi_pct_register status_register;
  75         unsigned int             state_count;
  76         struct acpi_processor_px *states;
  77
  78         /* the _PDC objects passed by the driver, if any */
  79         struct acpi_object_list *pdc;
  80 };
  81
  82
  83
  84 /* Throttling Control */
  85
  86 struct acpi_processor_tx {
  87         u16                     power;
  88         u16                     performance;
  89 };
  90
  91 struct acpi_processor_throttling {
  92         int                     state;
  93         u32                     address;
  94         u8                      duty_offset;
  95         u8                      duty_width;
  96         int                     state_count;
  97         struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
  98 };
  99
 100 /* Limit Interface */
 101
 102 struct acpi_processor_lx {
 103         int                     px;             /* performace state */
 104         int                     tx;             /* throttle level */
 105 };
 106
 107 struct acpi_processor_limit {
 108         struct acpi_processor_lx state;         /* current limit */
 109         struct acpi_processor_lx thermal;       /* thermal limit */
 110         struct acpi_processor_lx user;          /* user limit */
 111 };
 112
 113
 114 struct acpi_processor_flags {
 115         u8                      power:1;
 116         u8                      performance:1;
 117         u8                      throttling:1;
 118         u8                      limit:1;
 119         u8                      bm_control:1;
 120         u8                      bm_check:1;
 121         u8                      reserved:2;
 122 };
 123
 124 struct acpi_processor {
 125         acpi_handle             handle;
 126         u32                     acpi_id;
 127         u32                     id;
 128         int                     performance_platform_limit;
 129         struct acpi_processor_flags flags;
 130         struct acpi_processor_power power;
 131         struct acpi_processor_performance *performance;
 132         struct acpi_processor_throttling throttling;
 133         struct acpi_processor_limit limit;
 134 };
 135
 136 extern int acpi_processor_register_performance (
 137         struct acpi_processor_performance * performance,
 138         unsigned int cpu);
 139 extern void acpi_processor_unregister_performance (
 140         struct acpi_processor_performance * performance,
 141         unsigned int cpu);
 142
 143 #endif