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 <env.h>
   9 #include <linux/ctype.h>
  10
  11 #ifdef CONFIG_ARCH_CPU_INIT
  12 int arch_cpu_init(void)
  13 {
  14         icache_enable();
  15         return 0;
  16 }
  17 #endif
  18
  19 /* R-Car Gen3 D-cache is enabled in memmap-gen3.c */
  20 #ifndef CONFIG_RCAR_GEN3
  21 #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
  22 void enable_caches(void)
  23 {
  24         dcache_enable();
  25 }
  26 #endif
  27 #endif
  28
  29 #ifdef CONFIG_DISPLAY_CPUINFO
  30 #ifndef CONFIG_RZA1
  31 static u32 __rmobile_get_cpu_type(void)
  32 {
  33         return 0x0;
  34 }
  35 u32 rmobile_get_cpu_type(void)
  36                 __attribute__((weak, alias("__rmobile_get_cpu_type")));
  37
  38 static u32 __rmobile_get_cpu_rev_integer(void)
  39 {
  40         return 0;
  41 }
  42 u32 rmobile_get_cpu_rev_integer(void)
  43                 __attribute__((weak, alias("__rmobile_get_cpu_rev_integer")));
  44
  45 static u32 __rmobile_get_cpu_rev_fraction(void)
  46 {
  47         return 0;
  48 }
  49 u32 rmobile_get_cpu_rev_fraction(void)
  50                 __attribute__((weak, alias("__rmobile_get_cpu_rev_fraction")));
  51
  52 /* CPU infomation table */
  53 static const struct {
  54         u16 cpu_type;
  55         u8 cpu_name[10];
  56 } rmobile_cpuinfo[] = {
  57         { RMOBILE_CPU_TYPE_SH73A0, "SH73A0" },
  58         { RMOBILE_CPU_TYPE_R8A7740, "R8A7740" },
  59         { RMOBILE_CPU_TYPE_R8A7790, "R8A7790" },
  60         { RMOBILE_CPU_TYPE_R8A7791, "R8A7791" },
  61         { RMOBILE_CPU_TYPE_R8A7792, "R8A7792" },
  62         { RMOBILE_CPU_TYPE_R8A7793, "R8A7793" },
  63         { RMOBILE_CPU_TYPE_R8A7794, "R8A7794" },
  64         { RMOBILE_CPU_TYPE_R8A7795, "R8A7795" },
  65         { RMOBILE_CPU_TYPE_R8A7796, "R8A7796" },
  66         { RMOBILE_CPU_TYPE_R8A77965, "R8A77965" },
  67         { RMOBILE_CPU_TYPE_R8A77970, "R8A77970" },
  68         { RMOBILE_CPU_TYPE_R8A77980, "R8A77980" },
  69         { RMOBILE_CPU_TYPE_R8A77990, "R8A77990" },
  70         { RMOBILE_CPU_TYPE_R8A77995, "R8A77995" },
  71         { 0x0, "CPU" },
  72 };
  73
  74 static int rmobile_cpuinfo_idx(void)
  75 {
  76         int i = 0;
  77         u32 cpu_type = rmobile_get_cpu_type();
  78
  79         for (; i < ARRAY_SIZE(rmobile_cpuinfo); i++)
  80                 if (rmobile_cpuinfo[i].cpu_type == cpu_type)
  81                         break;
  82
  83         return i;
  84 }
  85
  86 #ifdef CONFIG_ARCH_MISC_INIT
  87 int arch_misc_init(void)
  88 {
  89         int i, idx = rmobile_cpuinfo_idx();
  90         char cpu[10] = { 0 };
  91
  92         for (i = 0; i < sizeof(cpu); i++)
  93                 cpu[i] = tolower(rmobile_cpuinfo[idx].cpu_name[i]);
  94
  95         env_set("platform", cpu);
  96
  97         return 0;
  98 }
  99 #endif
 100
 101 int print_cpuinfo(void)
 102 {
 103         int i = rmobile_cpuinfo_idx();
 104
 105         printf("CPU: Renesas Electronics %s rev %d.%d\n",
 106                 rmobile_cpuinfo[i].cpu_name, rmobile_get_cpu_rev_integer(),
 107                 rmobile_get_cpu_rev_fraction());
 108
 109         return 0;
 110 }
 111 #else
 112 int print_cpuinfo(void)
 113 {
 114         printf("CPU: Renesas Electronics RZ/A1\n");
 115         return 0;
 116 }
 117 #endif
 118 #endif /* CONFIG_DISPLAY_CPUINFO */