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1 #ifndef __ACPI_PROCESSOR_H |
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2 #define __ACPI_PROCESSOR_H |
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3 |
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4 #include <linux/kernel.h> |
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5 #include <linux/cpu.h> |
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6 #include <linux/cpuidle.h> |
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7 #include <linux/thermal.h> |
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8 #include <asm/acpi.h> |
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9 |
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10 #define ACPI_PROCESSOR_BUSY_METRIC 10 |
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11 |
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12 #define ACPI_PROCESSOR_MAX_POWER 8 |
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13 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100 |
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14 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000 |
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15 |
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16 #define ACPI_PROCESSOR_MAX_THROTTLING 16 |
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17 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */ |
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18 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4 |
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19 |
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20 #define ACPI_PDC_REVISION_ID 0x1 |
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21 |
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22 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ |
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23 #define ACPI_PSD_REV0_ENTRIES 5 |
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24 |
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25 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ |
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26 #define ACPI_TSD_REV0_ENTRIES 5 |
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27 /* |
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28 * Types of coordination defined in ACPI 3.0. Same macros can be used across |
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29 * P, C and T states |
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30 */ |
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31 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc |
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32 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd |
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33 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe |
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34 |
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35 #define ACPI_CSTATE_SYSTEMIO 0 |
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36 #define ACPI_CSTATE_FFH 1 |
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37 #define ACPI_CSTATE_HALT 2 |
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38 |
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39 #define ACPI_CX_DESC_LEN 32 |
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40 |
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41 /* Power Management */ |
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42 |
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43 struct acpi_processor_cx; |
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44 |
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45 struct acpi_power_register { |
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46 u8 descriptor; |
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47 u16 length; |
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48 u8 space_id; |
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49 u8 bit_width; |
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50 u8 bit_offset; |
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51 u8 reserved; |
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52 u64 address; |
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53 } __attribute__ ((packed)); |
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54 |
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55 struct acpi_processor_cx_policy { |
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56 u32 count; |
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57 struct acpi_processor_cx *state; |
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58 struct { |
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59 u32 time; |
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60 u32 ticks; |
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61 u32 count; |
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62 u32 bm; |
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63 } threshold; |
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64 }; |
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65 |
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66 struct acpi_processor_cx { |
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67 u8 valid; |
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68 u8 type; |
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69 u32 address; |
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70 u8 entry_method; |
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71 u8 index; |
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72 u32 latency; |
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73 u32 latency_ticks; |
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74 u32 power; |
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75 u32 usage; |
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76 u64 time; |
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77 struct acpi_processor_cx_policy promotion; |
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78 struct acpi_processor_cx_policy demotion; |
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79 char desc[ACPI_CX_DESC_LEN]; |
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80 }; |
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81 |
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82 struct acpi_processor_power { |
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83 struct cpuidle_device dev; |
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84 struct acpi_processor_cx *state; |
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85 unsigned long bm_check_timestamp; |
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86 u32 default_state; |
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87 u32 bm_activity; |
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88 int count; |
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89 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; |
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90 int timer_broadcast_on_state; |
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91 }; |
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92 |
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93 /* Performance Management */ |
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94 |
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95 struct acpi_psd_package { |
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96 acpi_integer num_entries; |
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97 acpi_integer revision; |
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98 acpi_integer domain; |
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99 acpi_integer coord_type; |
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100 acpi_integer num_processors; |
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101 } __attribute__ ((packed)); |
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102 |
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103 struct acpi_pct_register { |
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104 u8 descriptor; |
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105 u16 length; |
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106 u8 space_id; |
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107 u8 bit_width; |
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108 u8 bit_offset; |
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109 u8 reserved; |
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110 u64 address; |
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111 } __attribute__ ((packed)); |
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112 |
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113 struct acpi_processor_px { |
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114 acpi_integer core_frequency; /* megahertz */ |
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115 acpi_integer power; /* milliWatts */ |
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116 acpi_integer transition_latency; /* microseconds */ |
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117 acpi_integer bus_master_latency; /* microseconds */ |
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118 acpi_integer control; /* control value */ |
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119 acpi_integer status; /* success indicator */ |
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120 }; |
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121 |
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122 struct acpi_processor_performance { |
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123 unsigned int state; |
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124 unsigned int platform_limit; |
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125 struct acpi_pct_register control_register; |
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126 struct acpi_pct_register status_register; |
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127 unsigned int state_count; |
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128 struct acpi_processor_px *states; |
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129 struct acpi_psd_package domain_info; |
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130 cpumask_t shared_cpu_map; |
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131 unsigned int shared_type; |
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132 }; |
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133 |
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134 /* Throttling Control */ |
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135 |
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136 struct acpi_tsd_package { |
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137 acpi_integer num_entries; |
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138 acpi_integer revision; |
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139 acpi_integer domain; |
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140 acpi_integer coord_type; |
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141 acpi_integer num_processors; |
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142 } __attribute__ ((packed)); |
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143 |
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144 struct acpi_ptc_register { |
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145 u8 descriptor; |
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146 u16 length; |
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147 u8 space_id; |
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148 u8 bit_width; |
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149 u8 bit_offset; |
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150 u8 reserved; |
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151 u64 address; |
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152 } __attribute__ ((packed)); |
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153 |
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154 struct acpi_processor_tx_tss { |
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155 acpi_integer freqpercentage; /* */ |
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156 acpi_integer power; /* milliWatts */ |
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157 acpi_integer transition_latency; /* microseconds */ |
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158 acpi_integer control; /* control value */ |
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159 acpi_integer status; /* success indicator */ |
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160 }; |
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161 struct acpi_processor_tx { |
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162 u16 power; |
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163 u16 performance; |
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164 }; |
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165 |
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166 struct acpi_processor; |
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167 struct acpi_processor_throttling { |
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168 unsigned int state; |
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169 unsigned int platform_limit; |
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170 struct acpi_pct_register control_register; |
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171 struct acpi_pct_register status_register; |
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172 unsigned int state_count; |
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173 struct acpi_processor_tx_tss *states_tss; |
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174 struct acpi_tsd_package domain_info; |
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175 cpumask_t shared_cpu_map; |
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176 int (*acpi_processor_get_throttling) (struct acpi_processor * pr); |
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177 int (*acpi_processor_set_throttling) (struct acpi_processor * pr, |
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178 int state); |
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179 |
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180 u32 address; |
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181 u8 duty_offset; |
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182 u8 duty_width; |
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183 u8 tsd_valid_flag; |
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184 unsigned int shared_type; |
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185 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; |
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186 }; |
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187 |
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188 /* Limit Interface */ |
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189 |
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190 struct acpi_processor_lx { |
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191 int px; /* performance state */ |
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192 int tx; /* throttle level */ |
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193 }; |
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194 |
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195 struct acpi_processor_limit { |
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196 struct acpi_processor_lx state; /* current limit */ |
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197 struct acpi_processor_lx thermal; /* thermal limit */ |
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198 struct acpi_processor_lx user; /* user limit */ |
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199 }; |
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200 |
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201 struct acpi_processor_flags { |
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202 u8 power:1; |
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203 u8 performance:1; |
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204 u8 throttling:1; |
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205 u8 limit:1; |
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206 u8 bm_control:1; |
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207 u8 bm_check:1; |
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208 u8 has_cst:1; |
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209 u8 power_setup_done:1; |
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210 u8 bm_rld_set:1; |
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211 }; |
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212 |
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213 struct acpi_processor { |
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214 acpi_handle handle; |
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215 u32 acpi_id; |
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216 u32 id; |
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217 u32 pblk; |
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218 int performance_platform_limit; |
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219 int throttling_platform_limit; |
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220 /* 0 - states 0..n-th state available */ |
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221 |
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222 struct acpi_processor_flags flags; |
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223 struct acpi_processor_power power; |
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224 struct acpi_processor_performance *performance; |
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225 struct acpi_processor_throttling throttling; |
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226 struct acpi_processor_limit limit; |
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227 struct thermal_cooling_device *cdev; |
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228 /* the _PDC objects for this processor, if any */ |
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229 struct acpi_object_list *pdc; |
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230 }; |
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231 |
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232 struct acpi_processor_errata { |
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233 u8 smp; |
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234 struct { |
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235 u8 throttle:1; |
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236 u8 fdma:1; |
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237 u8 reserved:6; |
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238 u32 bmisx; |
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239 } piix4; |
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240 }; |
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241 |
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242 extern int acpi_processor_preregister_performance(struct |
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243 acpi_processor_performance |
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244 *performance); |
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245 |
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246 extern int acpi_processor_register_performance(struct acpi_processor_performance |
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247 *performance, unsigned int cpu); |
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248 extern void acpi_processor_unregister_performance(struct |
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249 acpi_processor_performance |
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250 *performance, |
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251 unsigned int cpu); |
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252 |
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253 /* note: this locks both the calling module and the processor module |
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254 if a _PPC object exists, rmmod is disallowed then */ |
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255 int acpi_processor_notify_smm(struct module *calling_module); |
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256 |
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257 /* for communication between multiple parts of the processor kernel module */ |
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258 DECLARE_PER_CPU(struct acpi_processor *, processors); |
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259 extern struct acpi_processor_errata errata; |
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260 |
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261 void arch_acpi_processor_init_pdc(struct acpi_processor *pr); |
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262 |
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263 #ifdef ARCH_HAS_POWER_INIT |
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264 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, |
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265 unsigned int cpu); |
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266 int acpi_processor_ffh_cstate_probe(unsigned int cpu, |
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267 struct acpi_processor_cx *cx, |
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268 struct acpi_power_register *reg); |
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269 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); |
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270 #else |
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271 static inline void acpi_processor_power_init_bm_check(struct |
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272 acpi_processor_flags |
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273 *flags, unsigned int cpu) |
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274 { |
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275 flags->bm_check = 1; |
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276 return; |
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277 } |
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278 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, |
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279 struct acpi_processor_cx *cx, |
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280 struct acpi_power_register |
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281 *reg) |
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282 { |
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283 return -1; |
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284 } |
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285 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx |
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286 *cstate) |
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287 { |
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288 return; |
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289 } |
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290 #endif |
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291 |
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292 /* in processor_perflib.c */ |
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293 |
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294 #ifdef CONFIG_CPU_FREQ |
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295 void acpi_processor_ppc_init(void); |
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296 void acpi_processor_ppc_exit(void); |
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297 int acpi_processor_ppc_has_changed(struct acpi_processor *pr); |
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298 #else |
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299 static inline void acpi_processor_ppc_init(void) |
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300 { |
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301 return; |
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302 } |
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303 static inline void acpi_processor_ppc_exit(void) |
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304 { |
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305 return; |
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306 } |
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307 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr) |
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308 { |
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309 static unsigned int printout = 1; |
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310 if (printout) { |
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311 printk(KERN_WARNING |
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312 "Warning: Processor Platform Limit event detected, but not handled.\n"); |
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313 printk(KERN_WARNING |
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314 "Consider compiling CPUfreq support into your kernel.\n"); |
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315 printout = 0; |
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316 } |
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317 return 0; |
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318 } |
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319 #endif /* CONFIG_CPU_FREQ */ |
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320 |
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321 /* in processor_throttling.c */ |
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322 int acpi_processor_tstate_has_changed(struct acpi_processor *pr); |
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323 int acpi_processor_get_throttling_info(struct acpi_processor *pr); |
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324 extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state); |
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325 extern struct file_operations acpi_processor_throttling_fops; |
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326 extern void acpi_processor_throttling_init(void); |
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327 /* in processor_idle.c */ |
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328 int acpi_processor_power_init(struct acpi_processor *pr, |
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329 struct acpi_device *device); |
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330 int acpi_processor_cst_has_changed(struct acpi_processor *pr); |
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331 int acpi_processor_power_exit(struct acpi_processor *pr, |
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332 struct acpi_device *device); |
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333 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state); |
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334 int acpi_processor_resume(struct acpi_device * device); |
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335 extern struct cpuidle_driver acpi_idle_driver; |
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336 |
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337 /* in processor_thermal.c */ |
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338 int acpi_processor_get_limit_info(struct acpi_processor *pr); |
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339 extern struct file_operations acpi_processor_limit_fops; |
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340 extern struct thermal_cooling_device_ops processor_cooling_ops; |
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341 #ifdef CONFIG_CPU_FREQ |
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342 void acpi_thermal_cpufreq_init(void); |
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343 void acpi_thermal_cpufreq_exit(void); |
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344 #else |
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345 static inline void acpi_thermal_cpufreq_init(void) |
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346 { |
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347 return; |
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348 } |
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349 static inline void acpi_thermal_cpufreq_exit(void) |
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350 { |
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351 return; |
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352 } |
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353 #endif |
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354 |
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355 #endif |