Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/osfmk/ppc/pmsCPU.c
Version:
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1 /* 2 * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * The contents of this file constitute Original Code as defined in and 7 * are subject to the Apple Public Source License Version 1.1 (the 8 * "License"). You may not use this file except in compliance with the 9 * License. Please obtain a copy of the License at 10 * http://www.apple.com/publicsource and read it before using this file. 11 * 12 * This Original Code and all software distributed under the License are 13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 17 * License for the specific language governing rights and limitations 18 * under the License. 19 * 20 * @APPLE_LICENSE_HEADER_END@ 21 */ 22 #include <ppc/machine_routines.h> 23 #include <ppc/machine_cpu.h> 24 #include <ppc/exception.h> 25 #include <ppc/misc_protos.h> 26 #include <ppc/Firmware.h> 27 #include <ppc/pmap.h> 28 #include <ppc/asm.h> 29 #include <ppc/proc_reg.h> 30 #include <ppc/pms.h> 31 #include <ppc/savearea.h> 32 #include <ppc/Diagnostics.h> 33 #include <kern/processor.h> 34 35 36 pmsDef pmsDefault[] = { 37 { 38 .pmsLimit = century, /* We can normally stay here for 100 years */ 39 .pmsStepID = pmsIdle, /* Unique identifier to this step */ 40 .pmsSetCmd = 0, /* Dummy platform power level */ 41 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 42 .pmsDown = pmsIdle, /* We stay here */ 43 .pmsNext = pmsNorm /* Next step */ 44 }, 45 { 46 .pmsLimit = century, /* We can normally stay here for 100 years */ 47 .pmsStepID = pmsNorm, /* Unique identifier to this step */ 48 .pmsSetCmd = 0, /* Dummy platform power level */ 49 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 50 .pmsDown = pmsIdle, /* Down to idle */ 51 .pmsNext = pmsNorm /* Next step */ 52 }, 53 { 54 .pmsLimit = century, /* We can normally stay here for 100 years */ 55 .pmsStepID = pmsNormHigh, /* Unique identifier to this step */ 56 .pmsSetCmd = 0, /* Dummy platform power level */ 57 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 58 .pmsDown = pmsIdle, /* Down to idle */ 59 .pmsNext = pmsNormHigh /* Next step */ 60 }, 61 { 62 .pmsLimit = century, /* We can normally stay here for 100 years */ 63 .pmsStepID = pmsBoost, /* Unique identifier to this step */ 64 .pmsSetCmd = 0, /* Dummy platform power level */ 65 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 66 .pmsDown = pmsIdle, /* Step down */ 67 .pmsNext = pmsBoost /* Next step */ 68 }, 69 { 70 .pmsLimit = century, /* We can normally stay here for 100 years */ 71 .pmsStepID = pmsLow, /* Unique identifier to this step */ 72 .pmsSetCmd = 0, /* Dummy platform power level */ 73 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 74 .pmsDown = pmsLow, /* We always stay here */ 75 .pmsNext = pmsLow /* We always stay here */ 76 }, 77 { 78 .pmsLimit = century, /* We can normally stay here for 100 years */ 79 .pmsStepID = pmsHigh, /* Unique identifier to this step */ 80 .pmsSetCmd = 0, /* Dummy platform power level */ 81 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 82 .pmsDown = pmsHigh, /* We always stay here */ 83 .pmsNext = pmsHigh /* We always stay here */ 84 }, 85 { 86 .pmsLimit = 0, /* Time doesn't matter for a prepare for change */ 87 .pmsStepID = pmsPrepCng, /* Unique identifier to this step */ 88 .pmsSetCmd = pmsParkIt, /* Force us to be parked */ 89 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 90 .pmsDown = pmsPrepCng, /* We always stay here */ 91 .pmsNext = pmsPrepCng /* We always stay here */ 92 }, 93 { 94 .pmsLimit = 0, /* Time doesn't matter for a prepare for sleep */ 95 .pmsStepID = pmsPrepSleep, /* Unique identifier to this step */ 96 .pmsSetCmd = pmsParkIt, /* Force us to be parked */ 97 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 98 .pmsDown = pmsPrepSleep, /* We always stay here */ 99 .pmsNext = pmsPrepSleep /* We always stay here */ 100 }, 101 { 102 .pmsLimit = 0, /* Time doesn't matter for a prepare for sleep */ 103 .pmsStepID = pmsOverTemp, /* Unique identifier to this step */ 104 .pmsSetCmd = 0, /* Dummy platform power level */ 105 .sf.pmsSetFuncInd = 0, /* Dummy platform set function */ 106 .pmsDown = pmsOverTemp, /* We always stay here */ 107 .pmsNext = pmsOverTemp /* We always stay here */ 108 } 109 }; 110 111 112 113 /* 114 * This is where the CPU part of the stepper code lives. 115 * 116 * It also contains the "hacked kext" experimental code. This is/was used for 117 * experimentation and bringup. It should neither live long nor prosper. 118 * 119 */ 120 121 /* 122 * Set the processor frequency and stuff 123 */ 124 125 void pmsCPUSet(uint32_t sel) { 126 int nvoltage, nfreq; 127 uint32_t oldaack; 128 struct per_proc_info *pp; 129 130 pp = getPerProc(); /* Get our per_proc */ 131 132 if(!((sel ^ pp->pms.pmsCSetCmd) & pmsCPU)) return; /* If there aren't any changes, bail now... */ 133 134 nfreq = (sel & pmsCPU) >> 16; /* Isolate the new frequency */ 135 136 switch(pp->pf.pfPowerModes & pmType) { /* Figure out what type to do */ 137 138 case pmDFS: /* This is a DFS machine */ 139 ml_set_processor_speed_dfs(nfreq); /* Yes, set it */ 140 break; 141 142 case pmDualPLL: 143 ml_set_processor_speed_dpll(nfreq); /* THIS IS COMPLETELY UNTESTED!!! */ 144 break; 145 146 case pmPowerTune: /* This is a PowerTune machine */ 147 ml_set_processor_speed_powertune(nfreq); /* Diddle the deal */ 148 break; 149 150 default: /* Not this time dolt!!! */ 151 panic("pmsCPUSet: unsupported power manager type: %08X\n", pp->pf.pfPowerModes); 152 break; 153 154 } 155 156 } 157 158 /* 159 * This code configures the initial step tables. It should be called after the timebase frequency is initialized. 160 */ 161 162 void pmsCPUConf(void) { 163 164 int i; 165 kern_return_t ret; 166 pmsSetFunc_t pmsDfltFunc[pmsSetFuncMax]; /* List of functions for the external power control to use */ 167 168 for(i = 0; i < pmsSetFuncMax; i++) pmsDfltFunc[i] = 0; /* Clear this */ 169 170 171 ret = pmsBuild((pmsDef *)&pmsDefault, sizeof(pmsDefault), pmsDfltFunc, 0, (pmsQueryFunc_t)0); /* Configure the default stepper */ 172 173 pCCfinish: 174 if(ret != KERN_SUCCESS) { /* Some screw up? */ 175 panic("pmsCPUConf: initial stepper table build failed, ret = %08X\n", ret); /* Squeal */ 176 } 177 178 pmsSetStep(pmsHigh, 1); /* Slew to high speed */ 179 pmsPark(); /* Then park */ 180 return; 181 } 182 183 /* 184 * This function should be called once for each processor to force the 185 * processor to the correct voltage and frequency. 186 */ 187 188 void pmsCPUInit(void) { 189 190 int cpu; 191 192 cpu = cpu_number(); /* Who are we? */ 193 194 kprintf("************ Initializing stepper hardware, cpu %d ******************\n", cpu); /* (BRINGUP) */ 195 196 pmsSetStep(pmsHigh, 1); /* Slew to high speed */ 197 pmsPark(); /* Then park */ 198 199 kprintf("************ Stepper hardware initialized, cpu %d ******************\n", cpu); /* (BRINGUP) */ 200 201 return; 202 } 203 204 uint32_t pmsCPUquery(void) { 205 206 uint32_t result; 207 struct per_proc_info *pp; 208 uint64_t scdata; 209 210 pp = getPerProc(); /* Get our per_proc */ 211 212 switch(pp->pf.pfPowerModes & pmType) { /* Figure out what type to do */ 213 214 case pmDFS: /* This is a DFS machine */ 215 result = hid1get(); /* Get HID1 */ 216 result = (result >> 6) & 0x00030000; /* Isolate the DFS bits */ 217 break; 218 219 case pmPowerTune: /* This is a PowerTune machine */ 220 (void)ml_scom_read(PowerTuneStatusReg, &scdata); /* Get the current power level */ 221 result = (scdata >> (32 + 8)) & 0x00030000; /* Shift the data to align with the set command */ 222 break; 223 224 default: /* Query not supported for this kind */ 225 result = 0; /* Return highest if not supported */ 226 break; 227 228 } 229 230 return result; 231 } 232 233
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