osfmk/ppc/pmsCPU.c

   1 /*
   2  * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #include <ppc/machine_routines.h>
  29 #include <ppc/machine_cpu.h>
  30 #include <ppc/exception.h>
  31 #include <ppc/misc_protos.h>
  32 #include <ppc/Firmware.h>
  33 #include <ppc/pmap.h>
  34 #include <ppc/asm.h>
  35 #include <ppc/proc_reg.h>
  36 #include <ppc/pms.h>
  37 #include <ppc/savearea.h>
  38 #include <ppc/Diagnostics.h>
  39 #include <kern/processor.h>
  40
  41
  42 pmsDef pmsDefault[] = {
  43         {
  44                 .pmsLimit = century,                                                    /* We can normally stay here for 100 years */
  45                 .pmsStepID = pmsIdle,                                                   /* Unique identifier to this step */
  46                 .pmsSetCmd = 0,                                                                 /* Dummy platform power level */
  47                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
  48                 .pmsDown = pmsIdle,                                                             /* We stay here */
  49                 .pmsNext = pmsNorm                                                              /* Next step */
  50         },
  51         {
  52                 .pmsLimit = century,                                                    /* We can normally stay here for 100 years */
  53                 .pmsStepID = pmsNorm,                                                   /* Unique identifier to this step */
  54                 .pmsSetCmd = 0,                                                                 /* Dummy platform power level */
  55                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
  56                 .pmsDown = pmsIdle,                                                             /* Down to idle */
  57                 .pmsNext = pmsNorm                                                              /* Next step */
  58         },
  59         {
  60                 .pmsLimit = century,                                                    /* We can normally stay here for 100 years */
  61                 .pmsStepID = pmsNormHigh,                                               /* Unique identifier to this step */
  62                 .pmsSetCmd = 0,                                                                 /* Dummy platform power level */
  63                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
  64                 .pmsDown = pmsIdle,                                                             /* Down to idle */
  65                 .pmsNext = pmsNormHigh                                                  /* Next step */
  66         },
  67         {
  68                 .pmsLimit = century,                                                    /* We can normally stay here for 100 years */
  69                 .pmsStepID = pmsBoost,                                                  /* Unique identifier to this step */
  70                 .pmsSetCmd = 0,                                                                 /* Dummy platform power level */
  71                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
  72                 .pmsDown = pmsIdle,                                                             /* Step down */
  73                 .pmsNext = pmsBoost                                                             /* Next step */
  74         },
  75         {
  76                 .pmsLimit = century,                                                    /* We can normally stay here for 100 years */
  77                 .pmsStepID = pmsLow,                                                    /* Unique identifier to this step */
  78                 .pmsSetCmd = 0,                                                                 /* Dummy platform power level */
  79                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
  80                 .pmsDown = pmsLow,                                                              /* We always stay here */
  81                 .pmsNext = pmsLow                                                               /* We always stay here */
  82         },
  83         {
  84                 .pmsLimit = century,                                                    /* We can normally stay here for 100 years */
  85                 .pmsStepID = pmsHigh,                                                   /* Unique identifier to this step */
  86                 .pmsSetCmd = 0,                                                                 /* Dummy platform power level */
  87                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
  88                 .pmsDown = pmsHigh,                                                             /* We always stay here */
  89                 .pmsNext = pmsHigh                                                              /* We always stay here */
  90         },
  91         {
  92                 .pmsLimit = 0,                                                                  /* Time doesn't matter for a prepare for change */
  93                 .pmsStepID = pmsPrepCng,                                                /* Unique identifier to this step */
  94                 .pmsSetCmd = pmsParkIt,                                                 /* Force us to be parked */
  95                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
  96                 .pmsDown = pmsPrepCng,                                                  /* We always stay here */
  97                 .pmsNext = pmsPrepCng                                                   /* We always stay here */
  98         },
  99         {
 100                 .pmsLimit = 0,                                                                  /* Time doesn't matter for a prepare for sleep */
 101                 .pmsStepID = pmsPrepSleep,                                              /* Unique identifier to this step */
 102                 .pmsSetCmd = pmsParkIt,                                                 /* Force us to be parked */
 103                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
 104                 .pmsDown = pmsPrepSleep,                                                /* We always stay here */
 105                 .pmsNext = pmsPrepSleep                                                 /* We always stay here */
 106         },
 107         {
 108                 .pmsLimit = 0,                                                                  /* Time doesn't matter for a prepare for sleep */
 109                 .pmsStepID = pmsOverTemp,                                               /* Unique identifier to this step */
 110                 .pmsSetCmd = 0,                                                                 /* Dummy platform power level */
 111                 .sf.pmsSetFuncInd = 0,                                                  /* Dummy platform set function */
 112                 .pmsDown = pmsOverTemp,                                                 /* We always stay here */
 113                 .pmsNext = pmsOverTemp                                                  /* We always stay here */
 114         }
 115 };
 116
 117
 118
 119 /*
 120  *      This is where the CPU part of the stepper code lives.
 121  *
 122  *      It also contains the "hacked kext" experimental code.  This is/was used for
 123  *      experimentation and bringup.  It should neither live long nor prosper.
 124  *
 125  */
 126
 127 /*
 128  *      Set the processor frequency and stuff
 129  */
 130
 131 void pmsCPUSet(uint32_t sel) {
 132         int nvoltage, nfreq;
 133         uint32_t oldaack;
 134         struct per_proc_info *pp;
 135
 136         pp = getPerProc();                                                                      /* Get our per_proc */
 137
 138         if(!((sel ^ pp->pms.pmsCSetCmd) & pmsCPU)) return;      /* If there aren't any changes, bail now... */
 139
 140         nfreq = (sel & pmsCPU) >> 16;                                           /* Isolate the new frequency */
 141
 142         switch(pp->pf.pfPowerModes & pmType) {                          /* Figure out what type to do */
 143
 144                 case pmDFS:                                                                             /* This is a DFS machine */
 145                         ml_set_processor_speed_dfs(nfreq);                      /* Yes, set it */
 146                         break;
 147
 148                 case pmDualPLL:
 149                         ml_set_processor_speed_dpll(nfreq);                     /* THIS IS COMPLETELY UNTESTED!!! */
 150                         break;
 151
 152                 case pmPowerTune:                                                               /* This is a PowerTune machine */
 153                         ml_set_processor_speed_powertune(nfreq);        /* Diddle the deal */
 154                         break;
 155
 156                 default:                                                                                /* Not this time dolt!!! */
 157                         panic("pmsCPUSet: unsupported power manager type: %08X\n", pp->pf.pfPowerModes);
 158                         break;
 159
 160         }
 161
 162 }
 163
 164 /*
 165  *      This code configures the initial step tables.  It should be called after the timebase frequency is initialized.
 166  */
 167
 168 void pmsCPUConf(void) {
 169
 170         int i;
 171         kern_return_t ret;
 172         pmsSetFunc_t pmsDfltFunc[pmsSetFuncMax];                        /* List of functions for the external power control to use */
 173
 174         for(i = 0; i < pmsSetFuncMax; i++) pmsDfltFunc[i] = 0;  /* Clear this */
 175
 176
 177         ret = pmsBuild((pmsDef *)&pmsDefault, sizeof(pmsDefault), pmsDfltFunc, 0, (pmsQueryFunc_t)0);   /* Configure the default stepper */
 178
 179 pCCfinish:
 180         if(ret != KERN_SUCCESS) {                                                       /* Some screw up? */
 181                 panic("pmsCPUConf: initial stepper table build failed, ret = %08X\n", ret);     /* Squeal */
 182         }
 183
 184         pmsSetStep(pmsHigh, 1);                                                         /* Slew to high speed */
 185         pmsPark();                                                                                      /* Then park */
 186         return;
 187 }
 188
 189 /*
 190  *      This function should be called once for each processor to force the
 191  *      processor to the correct voltage and frequency.
 192  */
 193
 194 void pmsCPUInit(void) {
 195
 196         int cpu;
 197
 198         cpu = cpu_number();                                                                     /* Who are we? */
 199
 200         kprintf("************ Initializing stepper hardware, cpu %d ******************\n", cpu);        /* (BRINGUP) */
 201
 202         pmsSetStep(pmsHigh, 1);                                                         /* Slew to high speed */
 203         pmsPark();                                                                                      /* Then park */
 204
 205         kprintf("************ Stepper hardware initialized, cpu %d ******************\n", cpu); /* (BRINGUP) */
 206
 207         return;
 208 }
 209
 210 uint32_t pmsCPUquery(void) {
 211
 212         uint32_t result;
 213         struct per_proc_info *pp;
 214         uint64_t scdata;
 215
 216         pp = getPerProc();                                                                      /* Get our per_proc */
 217
 218         switch(pp->pf.pfPowerModes & pmType) {                          /* Figure out what type to do */
 219
 220                 case pmDFS:                                                                             /* This is a DFS machine */
 221                         result = hid1get();                                                     /* Get HID1 */
 222                         result = (result >> 6) & 0x00030000;            /* Isolate the DFS bits */
 223                         break;
 224
 225                 case pmPowerTune:                                                               /* This is a PowerTune machine */
 226                         (void)ml_scom_read(PowerTuneStatusReg, &scdata);        /* Get the current power level */
 227                         result = (scdata >> (32 + 8)) & 0x00030000;     /* Shift the data to align with the set command */
 228                         break;
 229
 230                 default:                                                                                /* Query not supported for this kind */
 231                         result = 0;                                                                     /* Return highest if not supported */
 232                         break;
 233
 234         }
 235
 236         return result;
 237 }
 238
 239