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