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