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 <cpu_func.h>
   8 #include <asm/cache.h>
   9 #include <init.h>
  10 #include <asm/io.h>
  11 #include <env.h>
  12 #include <linux/ctype.h>
  13
  14 #ifdef CONFIG_ARCH_CPU_INIT
  15 int arch_cpu_init(void)
  16 {
  17         icache_enable();
  18         return 0;
  19 }
  20 #endif
  21
  22 /* R-Car Gen3 D-cache is enabled in memmap-gen3.c */
  23 #ifndef CONFIG_RCAR_GEN3
  24 #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
  25 void enable_caches(void)
  26 {
  27         dcache_enable();
  28 }
  29 #endif
  30 #endif
  31
  32 #ifdef CONFIG_DISPLAY_CPUINFO
  33 #ifndef CONFIG_RZA1
  34 static u32 __rmobile_get_cpu_type(void)
  35 {
  36         return 0x0;
  37 }
  38 u32 rmobile_get_cpu_type(void)
  39                 __attribute__((weak, alias("__rmobile_get_cpu_type")));
  40
  41 static u32 __rmobile_get_cpu_rev_integer(void)
  42 {
  43         return 0;
  44 }
  45 u32 rmobile_get_cpu_rev_integer(void)
  46                 __attribute__((weak, alias("__rmobile_get_cpu_rev_integer")));
  47
  48 static u32 __rmobile_get_cpu_rev_fraction(void)
  49 {
  50         return 0;
  51 }
  52 u32 rmobile_get_cpu_rev_fraction(void)
  53                 __attribute__((weak, alias("__rmobile_get_cpu_rev_fraction")));
  54
  55 /* CPU infomation table */
  56 static const struct {
  57         u16 cpu_type;
  58         u8 cpu_name[10];
  59 } rmobile_cpuinfo[] = {
  60         { RMOBILE_CPU_TYPE_SH73A0, "SH73A0" },
  61         { RMOBILE_CPU_TYPE_R8A7740, "R8A7740" },
  62         { RMOBILE_CPU_TYPE_R8A7790, "R8A7790" },
  63         { RMOBILE_CPU_TYPE_R8A7791, "R8A7791" },
  64         { RMOBILE_CPU_TYPE_R8A7792, "R8A7792" },
  65         { RMOBILE_CPU_TYPE_R8A7793, "R8A7793" },
  66         { RMOBILE_CPU_TYPE_R8A7794, "R8A7794" },
  67         { RMOBILE_CPU_TYPE_R8A7795, "R8A7795" },
  68         { RMOBILE_CPU_TYPE_R8A7796, "R8A7796" },
  69         { RMOBILE_CPU_TYPE_R8A77965, "R8A77965" },
  70         { RMOBILE_CPU_TYPE_R8A77970, "R8A77970" },
  71         { RMOBILE_CPU_TYPE_R8A77980, "R8A77980" },
  72         { RMOBILE_CPU_TYPE_R8A77990, "R8A77990" },
  73         { RMOBILE_CPU_TYPE_R8A77995, "R8A77995" },
  74         { 0x0, "CPU" },
  75 };
  76
  77 static int rmobile_cpuinfo_idx(void)
  78 {
  79         int i = 0;
  80         u32 cpu_type = rmobile_get_cpu_type();
  81
  82         for (; i < ARRAY_SIZE(rmobile_cpuinfo); i++)
  83                 if (rmobile_cpuinfo[i].cpu_type == cpu_type)
  84                         break;
  85
  86         return i;
  87 }
  88
  89 #ifdef CONFIG_ARCH_MISC_INIT
  90 int arch_misc_init(void)
  91 {
  92         int i, idx = rmobile_cpuinfo_idx();
  93         char cpu[10] = { 0 };
  94
  95         for (i = 0; i < sizeof(cpu); i++)
  96                 cpu[i] = tolower(rmobile_cpuinfo[idx].cpu_name[i]);
  97
  98         env_set("platform", cpu);
  99
 100         return 0;
 101 }
 102 #endif
 103
 104 int print_cpuinfo(void)
 105 {
 106         int i = rmobile_cpuinfo_idx();
 107
 108         printf("CPU: Renesas Electronics %s rev %d.%d\n",
 109                 rmobile_cpuinfo[i].cpu_name, rmobile_get_cpu_rev_integer(),
 110                 rmobile_get_cpu_rev_fraction());
 111
 112         return 0;
 113 }
 114 #else
 115 int print_cpuinfo(void)
 116 {
 117         printf("CPU: Renesas Electronics RZ/A1\n");
 118         return 0;
 119 }
 120 #endif
 121 #endif /* CONFIG_DISPLAY_CPUINFO */