arch/mips/kernel/proc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  Copyright (C) 1995, 1996, 2001  Ralf Baechle
   4  *  Copyright (C) 2001, 2004  MIPS Technologies, Inc.
   5  *  Copyright (C) 2004  Maciej W. Rozycki
   6  */
   7 #include <linux/delay.h>
   8 #include <linux/kernel.h>
   9 #include <linux/sched.h>
  10 #include <linux/seq_file.h>
  11 #include <asm/bootinfo.h>
  12 #include <asm/cpu.h>
  13 #include <asm/cpu-features.h>
  14 #include <asm/idle.h>
  15 #include <asm/mipsregs.h>
  16 #include <asm/processor.h>
  17 #include <asm/prom.h>
  18
  19 unsigned int vced_count, vcei_count;
  20
  21 /*
  22  *  * No lock; only written during early bootup by CPU 0.
  23  *   */
  24 static RAW_NOTIFIER_HEAD(proc_cpuinfo_chain);
  25
  26 int __ref register_proc_cpuinfo_notifier(struct notifier_block *nb)
  27 {
  28         return raw_notifier_chain_register(&proc_cpuinfo_chain, nb);
  29 }
  30
  31 int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v)
  32 {
  33         return raw_notifier_call_chain(&proc_cpuinfo_chain, val, v);
  34 }
  35
  36 static int show_cpuinfo(struct seq_file *m, void *v)
  37 {
  38         struct proc_cpuinfo_notifier_args proc_cpuinfo_notifier_args;
  39         unsigned long n = (unsigned long) v - 1;
  40         unsigned int version = cpu_data[n].processor_id;
  41         unsigned int fp_vers = cpu_data[n].fpu_id;
  42         char fmt [64];
  43         int i;
  44
  45 #ifdef CONFIG_SMP
  46         if (!cpu_online(n))
  47                 return 0;
  48 #endif
  49
  50         /*
  51          * For the first processor also print the system type
  52          */
  53         if (n == 0) {
  54                 seq_printf(m, "system type\t\t: %s\n", get_system_type());
  55                 if (mips_get_machine_name())
  56                         seq_printf(m, "machine\t\t\t: %s\n",
  57                                    mips_get_machine_name());
  58         }
  59
  60         seq_printf(m, "processor\t\t: %ld\n", n);
  61         sprintf(fmt, "cpu model\t\t: %%s V%%d.%%d%s\n",
  62                       cpu_data[n].options & MIPS_CPU_FPU ? "  FPU V%d.%d" : "");
  63         seq_printf(m, fmt, __cpu_name[n],
  64                       (version >> 4) & 0x0f, version & 0x0f,
  65                       (fp_vers >> 4) & 0x0f, fp_vers & 0x0f);
  66         seq_printf(m, "BogoMIPS\t\t: %u.%02u\n",
  67                       cpu_data[n].udelay_val / (500000/HZ),
  68                       (cpu_data[n].udelay_val / (5000/HZ)) % 100);
  69         seq_printf(m, "wait instruction\t: %s\n", cpu_wait ? "yes" : "no");
  70         seq_printf(m, "microsecond timers\t: %s\n",
  71                       cpu_has_counter ? "yes" : "no");
  72         seq_printf(m, "tlb_entries\t\t: %d\n", cpu_data[n].tlbsize);
  73         seq_printf(m, "extra interrupt vector\t: %s\n",
  74                       cpu_has_divec ? "yes" : "no");
  75         seq_printf(m, "hardware watchpoint\t: %s",
  76                       cpu_has_watch ? "yes, " : "no\n");
  77         if (cpu_has_watch) {
  78                 seq_printf(m, "count: %d, address/irw mask: [",
  79                       cpu_data[n].watch_reg_count);
  80                 for (i = 0; i < cpu_data[n].watch_reg_count; i++)
  81                         seq_printf(m, "%s0x%04x", i ? ", " : "" ,
  82                                 cpu_data[n].watch_reg_masks[i]);
  83                 seq_printf(m, "]\n");
  84         }
  85
  86         seq_printf(m, "isa\t\t\t:");
  87         if (cpu_has_mips_1)
  88                 seq_printf(m, " mips1");
  89         if (cpu_has_mips_2)
  90                 seq_printf(m, "%s", " mips2");
  91         if (cpu_has_mips_3)
  92                 seq_printf(m, "%s", " mips3");
  93         if (cpu_has_mips_4)
  94                 seq_printf(m, "%s", " mips4");
  95         if (cpu_has_mips_5)
  96                 seq_printf(m, "%s", " mips5");
  97         if (cpu_has_mips32r1)
  98                 seq_printf(m, "%s", " mips32r1");
  99         if (cpu_has_mips32r2)
 100                 seq_printf(m, "%s", " mips32r2");
 101         if (cpu_has_mips32r5)
 102                 seq_printf(m, "%s", " mips32r5");
 103         if (cpu_has_mips32r6)
 104                 seq_printf(m, "%s", " mips32r6");
 105         if (cpu_has_mips64r1)
 106                 seq_printf(m, "%s", " mips64r1");
 107         if (cpu_has_mips64r2)
 108                 seq_printf(m, "%s", " mips64r2");
 109         if (cpu_has_mips64r5)
 110                 seq_printf(m, "%s", " mips64r5");
 111         if (cpu_has_mips64r6)
 112                 seq_printf(m, "%s", " mips64r6");
 113         seq_printf(m, "\n");
 114
 115         seq_printf(m, "ASEs implemented\t:");
 116         if (cpu_has_mips16)     seq_printf(m, "%s", " mips16");
 117         if (cpu_has_mips16e2)   seq_printf(m, "%s", " mips16e2");
 118         if (cpu_has_mdmx)       seq_printf(m, "%s", " mdmx");
 119         if (cpu_has_mips3d)     seq_printf(m, "%s", " mips3d");
 120         if (cpu_has_smartmips)  seq_printf(m, "%s", " smartmips");
 121         if (cpu_has_dsp)        seq_printf(m, "%s", " dsp");
 122         if (cpu_has_dsp2)       seq_printf(m, "%s", " dsp2");
 123         if (cpu_has_dsp3)       seq_printf(m, "%s", " dsp3");
 124         if (cpu_has_mipsmt)     seq_printf(m, "%s", " mt");
 125         if (cpu_has_mmips)      seq_printf(m, "%s", " micromips");
 126         if (cpu_has_vz)         seq_printf(m, "%s", " vz");
 127         if (cpu_has_msa)        seq_printf(m, "%s", " msa");
 128         if (cpu_has_eva)        seq_printf(m, "%s", " eva");
 129         if (cpu_has_htw)        seq_printf(m, "%s", " htw");
 130         if (cpu_has_xpa)        seq_printf(m, "%s", " xpa");
 131         if (cpu_has_loongson_mmi)       seq_printf(m, "%s", " loongson-mmi");
 132         if (cpu_has_loongson_cam)       seq_printf(m, "%s", " loongson-cam");
 133         if (cpu_has_loongson_ext)       seq_printf(m, "%s", " loongson-ext");
 134         if (cpu_has_loongson_ext2)      seq_printf(m, "%s", " loongson-ext2");
 135         seq_printf(m, "\n");
 136
 137         if (cpu_has_mmips) {
 138                 seq_printf(m, "micromips kernel\t: %s\n",
 139                       (read_c0_config3() & MIPS_CONF3_ISA_OE) ?  "yes" : "no");
 140         }
 141         seq_printf(m, "shadow register sets\t: %d\n",
 142                       cpu_data[n].srsets);
 143         seq_printf(m, "kscratch registers\t: %d\n",
 144                       hweight8(cpu_data[n].kscratch_mask));
 145         seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);
 146         seq_printf(m, "core\t\t\t: %d\n", cpu_core(&cpu_data[n]));
 147
 148 #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
 149         if (cpu_has_mipsmt)
 150                 seq_printf(m, "VPE\t\t\t: %d\n", cpu_vpe_id(&cpu_data[n]));
 151         else if (cpu_has_vp)
 152                 seq_printf(m, "VP\t\t\t: %d\n", cpu_vpe_id(&cpu_data[n]));
 153 #endif
 154
 155         sprintf(fmt, "VCE%%c exceptions\t\t: %s\n",
 156                       cpu_has_vce ? "%u" : "not available");
 157         seq_printf(m, fmt, 'D', vced_count);
 158         seq_printf(m, fmt, 'I', vcei_count);
 159
 160         proc_cpuinfo_notifier_args.m = m;
 161         proc_cpuinfo_notifier_args.n = n;
 162
 163         raw_notifier_call_chain(&proc_cpuinfo_chain, 0,
 164                                 &proc_cpuinfo_notifier_args);
 165
 166         seq_printf(m, "\n");
 167
 168         return 0;
 169 }
 170
 171 static void *c_start(struct seq_file *m, loff_t *pos)
 172 {
 173         unsigned long i = *pos;
 174
 175         return i < NR_CPUS ? (void *) (i + 1) : NULL;
 176 }
 177
 178 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 179 {
 180         ++*pos;
 181         return c_start(m, pos);
 182 }
 183
 184 static void c_stop(struct seq_file *m, void *v)
 185 {
 186 }
 187
 188 const struct seq_operations cpuinfo_op = {
 189         .start  = c_start,
 190         .next   = c_next,
 191         .stop   = c_stop,
 192         .show   = show_cpuinfo,
 193 };