arch/sh/kernel/cpu/proc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/seq_file.h>
   3 #include <linux/kernel.h>
   4 #include <linux/module.h>
   5 #include <asm/machvec.h>
   6 #include <asm/processor.h>
   7
   8 static const char *cpu_name[] = {
   9         [CPU_SH7201]    = "SH7201",
  10         [CPU_SH7203]    = "SH7203",     [CPU_SH7263]    = "SH7263",
  11         [CPU_SH7264]    = "SH7264",     [CPU_SH7269]    = "SH7269",
  12         [CPU_SH7206]    = "SH7206",     [CPU_SH7619]    = "SH7619",
  13         [CPU_SH7705]    = "SH7705",     [CPU_SH7706]    = "SH7706",
  14         [CPU_SH7707]    = "SH7707",     [CPU_SH7708]    = "SH7708",
  15         [CPU_SH7709]    = "SH7709",     [CPU_SH7710]    = "SH7710",
  16         [CPU_SH7712]    = "SH7712",     [CPU_SH7720]    = "SH7720",
  17         [CPU_SH7721]    = "SH7721",     [CPU_SH7729]    = "SH7729",
  18         [CPU_SH7750]    = "SH7750",     [CPU_SH7750S]   = "SH7750S",
  19         [CPU_SH7750R]   = "SH7750R",    [CPU_SH7751]    = "SH7751",
  20         [CPU_SH7751R]   = "SH7751R",    [CPU_SH7760]    = "SH7760",
  21         [CPU_SH4_202]   = "SH4-202",    [CPU_SH4_501]   = "SH4-501",
  22         [CPU_SH7763]    = "SH7763",     [CPU_SH7770]    = "SH7770",
  23         [CPU_SH7780]    = "SH7780",     [CPU_SH7781]    = "SH7781",
  24         [CPU_SH7343]    = "SH7343",     [CPU_SH7785]    = "SH7785",
  25         [CPU_SH7786]    = "SH7786",     [CPU_SH7757]    = "SH7757",
  26         [CPU_SH7722]    = "SH7722",     [CPU_SHX3]      = "SH-X3",
  27         [CPU_MXG]       = "MX-G",       [CPU_SH7723]    = "SH7723",
  28         [CPU_SH7366]    = "SH7366",     [CPU_SH7724]    = "SH7724",
  29         [CPU_SH7372]    = "SH7372",     [CPU_SH7734]    = "SH7734",
  30         [CPU_J2]        = "J2",
  31         [CPU_SH_NONE]   = "Unknown"
  32 };
  33
  34 const char *get_cpu_subtype(struct sh_cpuinfo *c)
  35 {
  36         return cpu_name[c->type];
  37 }
  38 EXPORT_SYMBOL(get_cpu_subtype);
  39
  40 #ifdef CONFIG_PROC_FS
  41 /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
  42 static const char *cpu_flags[] = {
  43         "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
  44         "ptea", "llsc", "l2", "op32", "pteaex", NULL
  45 };
  46
  47 static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
  48 {
  49         unsigned long i;
  50
  51         seq_printf(m, "cpu flags\t:");
  52
  53         if (!c->flags) {
  54                 seq_printf(m, " %s\n", cpu_flags[0]);
  55                 return;
  56         }
  57
  58         for (i = 0; cpu_flags[i]; i++)
  59                 if ((c->flags & (1 << i)))
  60                         seq_printf(m, " %s", cpu_flags[i+1]);
  61
  62         seq_printf(m, "\n");
  63 }
  64
  65 static void show_cacheinfo(struct seq_file *m, const char *type,
  66                            struct cache_info info)
  67 {
  68         unsigned int cache_size;
  69
  70         cache_size = info.ways * info.sets * info.linesz;
  71
  72         seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
  73                    type, cache_size >> 10, info.ways);
  74 }
  75
  76 /*
  77  *      Get CPU information for use by the procfs.
  78  */
  79 static int show_cpuinfo(struct seq_file *m, void *v)
  80 {
  81         struct sh_cpuinfo *c = v;
  82         unsigned int cpu = c - cpu_data;
  83
  84         if (!cpu_online(cpu))
  85                 return 0;
  86
  87         if (cpu == 0)
  88                 seq_printf(m, "machine\t\t: %s\n", get_system_type());
  89         else
  90                 seq_printf(m, "\n");
  91
  92         seq_printf(m, "processor\t: %d\n", cpu);
  93         seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
  94         seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
  95         if (c->cut_major == -1)
  96                 seq_printf(m, "cut\t\t: unknown\n");
  97         else if (c->cut_minor == -1)
  98                 seq_printf(m, "cut\t\t: %d.x\n", c->cut_major);
  99         else
 100                 seq_printf(m, "cut\t\t: %d.%d\n", c->cut_major, c->cut_minor);
 101
 102         show_cpuflags(m, c);
 103
 104         seq_printf(m, "cache type\t: ");
 105
 106         /*
 107          * Check for what type of cache we have, we support both the
 108          * unified cache on the SH-2 and SH-3, as well as the harvard
 109          * style cache on the SH-4.
 110          */
 111         if (c->icache.flags & SH_CACHE_COMBINED) {
 112                 seq_printf(m, "unified\n");
 113                 show_cacheinfo(m, "cache", c->icache);
 114         } else {
 115                 seq_printf(m, "split (harvard)\n");
 116                 show_cacheinfo(m, "icache", c->icache);
 117                 show_cacheinfo(m, "dcache", c->dcache);
 118         }
 119
 120         /* Optional secondary cache */
 121         if (c->flags & CPU_HAS_L2_CACHE)
 122                 show_cacheinfo(m, "scache", c->scache);
 123
 124         seq_printf(m, "address sizes\t: %u bits physical\n", c->phys_bits);
 125
 126         seq_printf(m, "bogomips\t: %lu.%02lu\n",
 127                      c->loops_per_jiffy/(500000/HZ),
 128                      (c->loops_per_jiffy/(5000/HZ)) % 100);
 129
 130         return 0;
 131 }
 132
 133 static void *c_start(struct seq_file *m, loff_t *pos)
 134 {
 135         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
 136 }
 137 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 138 {
 139         ++*pos;
 140         return c_start(m, pos);
 141 }
 142 static void c_stop(struct seq_file *m, void *v)
 143 {
 144 }
 145 const struct seq_operations cpuinfo_op = {
 146         .start  = c_start,
 147         .next   = c_next,
 148         .stop   = c_stop,
 149         .show   = show_cpuinfo,
 150 };
 151 #endif /* CONFIG_PROC_FS */