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 #include <mach/sg-regs.h>
  10
  11 int print_cpuinfo(void)
  12 {
  13         u32 revision, type, model, rev, required_model = 1, required_rev = 1;
  14
  15         revision = readl(SG_REVISION);
  16         type = (revision & SG_REVISION_TYPE_MASK) >> SG_REVISION_TYPE_SHIFT;
  17         model = (revision & SG_REVISION_MODEL_MASK) >> SG_REVISION_MODEL_SHIFT;
  18         rev = (revision & SG_REVISION_REV_MASK) >> SG_REVISION_REV_SHIFT;
  19
  20         puts("CPU:   ");
  21
  22         switch (type) {
  23         case 0x25:
  24                 puts("PH1-sLD3 (MN2WS0220)");
  25                 required_model = 2;
  26                 break;
  27         case 0x26:
  28                 puts("PH1-LD4 (MN2WS0250)");
  29                 required_rev = 2;
  30                 break;
  31         case 0x28:
  32                 puts("PH1-Pro4 (MN2WS0230)");
  33                 break;
  34         case 0x29:
  35                 puts("PH1-sLD8 (MN2WS0270)");
  36                 break;
  37         case 0x2A:
  38                 puts("PH1-Pro5 (MN2WS0300)");
  39                 break;
  40         case 0x2E:
  41                 puts("ProXstream2 (MN2WS0310)");
  42                 break;
  43         case 0x2F:
  44                 puts("PH1-LD6b (MN2WS0320)");
  45                 break;
  46         default:
  47                 printf("Unknown Processor ID (0x%x)\n", revision);
  48                 return -1;
  49         }
  50
  51         if (model > 1)
  52                 printf(" model %d", model);
  53
  54         printf(" (rev. %d)\n", rev);
  55
  56         if (model < required_model) {
  57                 printf("Sorry, this model is not supported.\n");
  58                 printf("Required model is %d.", required_model);
  59                 return -1;
  60         } else if (rev < required_rev) {
  61                 printf("Sorry, this revision is not supported.\n");
  62                 printf("Required revision is %d.", required_rev);
  63                 return -1;
  64         }
  65
  66         return 0;
  67 }