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