arch/arm/mach-rmobile/cpu_info.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
   4  * (C) Copyright 2012 Renesas Solutions Corp.
   5  */
   6 #include <common.h>
   7 #include <asm/io.h>
   8 #include <linux/ctype.h>
   9
  10 /* R-Car Gen3 caches are enabled in memmap-gen3.c */
  11 #ifndef CONFIG_RCAR_GEN3
  12 #ifdef CONFIG_ARCH_CPU_INIT
  13 int arch_cpu_init(void)
  14 {
  15         icache_enable();
  16         return 0;
  17 }
  18 #endif
  19
  20 #ifndef CONFIG_SYS_DCACHE_OFF
  21 void enable_caches(void)
  22 {
  23         dcache_enable();
  24 }
  25 #endif
  26 #endif
  27
  28 #ifdef CONFIG_DISPLAY_CPUINFO
  29 static u32 __rmobile_get_cpu_type(void)
  30 {
  31         return 0x0;
  32 }
  33 u32 rmobile_get_cpu_type(void)
  34                 __attribute__((weak, alias("__rmobile_get_cpu_type")));
  35
  36 static u32 __rmobile_get_cpu_rev_integer(void)
  37 {
  38         return 0;
  39 }
  40 u32 rmobile_get_cpu_rev_integer(void)
  41                 __attribute__((weak, alias("__rmobile_get_cpu_rev_integer")));
  42
  43 static u32 __rmobile_get_cpu_rev_fraction(void)
  44 {
  45         return 0;
  46 }
  47 u32 rmobile_get_cpu_rev_fraction(void)
  48                 __attribute__((weak, alias("__rmobile_get_cpu_rev_fraction")));
  49
  50 /* CPU infomation table */
  51 static const struct {
  52         u16 cpu_type;
  53         u8 cpu_name[10];
  54 } rmobile_cpuinfo[] = {
  55         { RMOBILE_CPU_TYPE_SH73A0, "SH73A0" },
  56         { RMOBILE_CPU_TYPE_R8A7740, "R8A7740" },
  57         { RMOBILE_CPU_TYPE_R8A7790, "R8A7790" },
  58         { RMOBILE_CPU_TYPE_R8A7791, "R8A7791" },
  59         { RMOBILE_CPU_TYPE_R8A7792, "R8A7792" },
  60         { RMOBILE_CPU_TYPE_R8A7793, "R8A7793" },
  61         { RMOBILE_CPU_TYPE_R8A7794, "R8A7794" },
  62         { RMOBILE_CPU_TYPE_R8A7795, "R8A7795" },
  63         { RMOBILE_CPU_TYPE_R8A7796, "R8A7796" },
  64         { RMOBILE_CPU_TYPE_R8A77965, "R8A77965" },
  65         { RMOBILE_CPU_TYPE_R8A77970, "R8A77970" },
  66         { RMOBILE_CPU_TYPE_R8A77990, "R8A77990" },
  67         { RMOBILE_CPU_TYPE_R8A77995, "R8A77995" },
  68         { 0x0, "CPU" },
  69 };
  70
  71 static int rmobile_cpuinfo_idx(void)
  72 {
  73         int i = 0;
  74         u32 cpu_type = rmobile_get_cpu_type();
  75
  76         for (; i < ARRAY_SIZE(rmobile_cpuinfo); i++)
  77                 if (rmobile_cpuinfo[i].cpu_type == cpu_type)
  78                         break;
  79
  80         return i;
  81 }
  82
  83 #ifdef CONFIG_ARCH_MISC_INIT
  84 int arch_misc_init(void)
  85 {
  86         int i, idx = rmobile_cpuinfo_idx();
  87         char cpu[10] = { 0 };
  88
  89         for (i = 0; i < sizeof(cpu); i++)
  90                 cpu[i] = tolower(rmobile_cpuinfo[idx].cpu_name[i]);
  91
  92         env_set("platform", cpu);
  93
  94         return 0;
  95 }
  96 #endif
  97
  98 int print_cpuinfo(void)
  99 {
 100         int i = rmobile_cpuinfo_idx();
 101
 102         printf("CPU: Renesas Electronics %s rev %d.%d\n",
 103                 rmobile_cpuinfo[i].cpu_name, rmobile_get_cpu_rev_integer(),
 104                 rmobile_get_cpu_rev_fraction());
 105
 106         return 0;
 107 }
 108 #endif /* CONFIG_DISPLAY_CPUINFO */