arch/arm/mach-uniphier/cpu_info.c

   1 /*
   2  * Copyright (C) 2013-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <linux/io.h>
   9
  10 #include "sg-regs.h"
  11
  12 int print_cpuinfo(void)
  13 {
  14         u32 revision, type, model, rev, required_model = 1, required_rev = 1;
  15
  16         revision = readl(SG_REVISION);
  17         type = (revision & SG_REVISION_TYPE_MASK) >> SG_REVISION_TYPE_SHIFT;
  18         model = (revision & SG_REVISION_MODEL_MASK) >> SG_REVISION_MODEL_SHIFT;
  19         rev = (revision & SG_REVISION_REV_MASK) >> SG_REVISION_REV_SHIFT;
  20
  21         puts("CPU:   ");
  22
  23         switch (type) {
  24         case 0x25:
  25                 puts("PH1-sLD3 (MN2WS0220)");
  26                 required_model = 2;
  27                 break;
  28         case 0x26:
  29                 puts("PH1-LD4 (MN2WS0250)");
  30                 required_rev = 2;
  31                 break;
  32         case 0x28:
  33                 puts("PH1-Pro4 (MN2WS0230)");
  34                 break;
  35         case 0x29:
  36                 puts("PH1-sLD8 (MN2WS0270)");
  37                 break;
  38         case 0x2A:
  39                 puts("PH1-Pro5 (MN2WS0300)");
  40                 break;
  41         case 0x2E:
  42                 puts("ProXstream2 (MN2WS0310)");
  43                 break;
  44         case 0x2F:
  45                 puts("PH1-LD6b (MN2WS0320)");
  46                 break;
  47         case 0x31:
  48                 puts("PH1-LD11 (SC1405AP1)");
  49                 break;
  50         case 0x32:
  51                 puts("PH1-LD20 (SC1401AJ1)");
  52                 break;
  53         default:
  54                 printf("Unknown Processor ID (0x%x)\n", revision);
  55                 return -1;
  56         }
  57
  58         printf(" model %d", model);
  59
  60         printf(" (rev. %d)\n", rev);
  61
  62         if (model < required_model) {
  63                 printf("Sorry, this model is not supported.\n");
  64                 printf("Required model is %d.", required_model);
  65                 return -1;
  66         } else if (rev < required_rev) {
  67                 printf("Sorry, this revision is not supported.\n");
  68                 printf("Required revision is %d.", required_rev);
  69                 return -1;
  70         }
  71
  72         return 0;
  73 }