linux_usr/v3_dvfs.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 #include "v3_user_dvfs.h"
   6
   7 void usage()
   8 {
   9     fprintf(stderr,"usage: v3_dvfs core|core..core command\n");
  10     fprintf(stderr,"    where command is one of the following\n");
  11     fprintf(stderr,"           acquire direct|external\n");
  12     fprintf(stderr,"           pstate  number\n");
  13     fprintf(stderr,"           freq    number (kHz)\n");
  14     fprintf(stderr,"           release\n\n");
  15     fprintf(stderr,"Look at /proc/v3vee/v3-dvfs to see state\n\n");
  16 }
  17
  18
  19
  20 int main(int argc, char *argv[])
  21 {
  22   if (argc!=4 && argc!=3) {
  23     usage();
  24     return -1;
  25   }
  26
  27
  28   uint32_t corestart, coreend, core ;
  29   int rc;
  30   char *cmd=argv[2];
  31
  32   if (strstr(argv[1],"..")) {
  33       if (sscanf(argv[1],"%u..%u",&corestart,&coreend)!=2) {
  34           usage();
  35           return -1;
  36       }
  37   } else {
  38       corestart=coreend=atoi(argv[1]);
  39   }
  40
  41
  42   if (argc==3 && strcasecmp(cmd,"release")) {
  43       usage();
  44       return -1;
  45   }
  46
  47   char *arg=argv[3];
  48
  49   rc=0;
  50
  51   for (core=corestart;core<=coreend;core++) {
  52       if (!strcasecmp(cmd,"acquire")) {
  53           if (!strcasecmp(arg,"direct")) {
  54               if (v3_user_dvfs_acquire_direct(core)) {
  55                   fprintf(stderr,"Failed to set core %u to direct\n",core);
  56                   rc=-1;
  57               } else {
  58                   fprintf(stderr,"Core %u set to direct\n",core);
  59               }
  60           } else if (!strcasecmp(arg,"external")) {
  61               if (v3_user_dvfs_acquire_external(core)) {
  62                   fprintf(stderr,"Failed to set core %u to external\n",core);
  63                   rc=-1;
  64               } else {
  65                   fprintf(stderr,"Core %u set to external\n",core);
  66               }
  67           } else {
  68               usage();
  69               return -1;
  70           }
  71       } else if (!strcasecmp(cmd,"pstate")) {
  72           if (v3_user_dvfs_set_pstate(core,atoll(arg))) {
  73               fprintf(stderr,"Failed to set core %u to pstate %d\n",core,atoi(arg));
  74               rc=-1;
  75           } else {
  76               fprintf(stderr,"Core %u set to pstate %d\n",core,atoi(arg));
  77           }
  78       } else if (!strcasecmp(cmd,"freq")) {
  79           if (v3_user_dvfs_set_freq(core,atoll(arg))) {
  80               fprintf(stderr,"Failed to set core %u to frequency %lld kHz\n",core,atoll(arg));
  81               rc=-1;
  82           } else {
  83               fprintf(stderr,"Core %u set to frequency %lld kHz\n",core,atoll(arg));
  84           }
  85       } else if (!strcasecmp(cmd,"release")) {
  86           if (v3_user_dvfs_release(core)) {
  87               fprintf(stderr,"Failed to release core %u to host control\n",core);
  88               rc=-1;
  89           } else {
  90               fprintf(stderr,"Released core %u to host control\n",core);
  91           }
  92       } else {
  93           usage();
  94           return -1;
  95       }
  96   }
  97
  98   return rc;
  99
 100 }
 101