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", str_yes_no(cpu_wait));
  70         seq_printf(m, "microsecond timers\t: %s\n",
  71                       str_yes_no(cpu_has_counter));
  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                       str_yes_no(cpu_has_divec));
  75         seq_printf(m, "hardware watchpoint\t: %s", str_yes_no(cpu_has_watch));
  76         if (cpu_has_watch) {
  77                 seq_printf(m, ", count: %d, address/irw mask: [",
  78                       cpu_data[n].watch_reg_count);
  79                 for (i = 0; i < cpu_data[n].watch_reg_count; i++)
  80                         seq_printf(m, "%s0x%04x", i ? ", " : "",
  81                                 cpu_data[n].watch_reg_masks[i]);
  82                 seq_puts(m, "]");
  83         }
  84
  85         seq_puts(m, "\nisa\t\t\t:");
  86         if (cpu_has_mips_1)
  87                 seq_puts(m, " mips1");
  88         if (cpu_has_mips_2)
  89                 seq_puts(m, " mips2");
  90         if (cpu_has_mips_3)
  91                 seq_puts(m, " mips3");
  92         if (cpu_has_mips_4)
  93                 seq_puts(m, " mips4");
  94         if (cpu_has_mips_5)
  95                 seq_puts(m, " mips5");
  96         if (cpu_has_mips32r1)
  97                 seq_puts(m, " mips32r1");
  98         if (cpu_has_mips32r2)
  99                 seq_puts(m, " mips32r2");
 100         if (cpu_has_mips32r5)
 101                 seq_puts(m, " mips32r5");
 102         if (cpu_has_mips32r6)
 103                 seq_puts(m, " mips32r6");
 104         if (cpu_has_mips64r1)
 105                 seq_puts(m, " mips64r1");
 106         if (cpu_has_mips64r2)
 107                 seq_puts(m, " mips64r2");
 108         if (cpu_has_mips64r5)
 109                 seq_puts(m, " mips64r5");
 110         if (cpu_has_mips64r6)
 111                 seq_puts(m, " mips64r6");
 112         seq_puts(m, "\n");
 113
 114         seq_puts(m, "ASEs implemented\t:");
 115         if (cpu_has_mips16)
 116                 seq_puts(m, " mips16");
 117         if (cpu_has_mips16e2)
 118                 seq_puts(m, " mips16e2");
 119         if (cpu_has_mdmx)
 120                 seq_puts(m, " mdmx");
 121         if (cpu_has_mips3d)
 122                 seq_puts(m, " mips3d");
 123         if (cpu_has_smartmips)
 124                 seq_puts(m, " smartmips");
 125         if (cpu_has_dsp)
 126                 seq_puts(m, " dsp");
 127         if (cpu_has_dsp2)
 128                 seq_puts(m, " dsp2");
 129         if (cpu_has_dsp3)
 130                 seq_puts(m, " dsp3");
 131         if (cpu_has_mipsmt)
 132                 seq_puts(m, " mt");
 133         if (cpu_has_mmips)
 134                 seq_puts(m, " micromips");
 135         if (cpu_has_vz)
 136                 seq_puts(m, " vz");
 137         if (cpu_has_msa)
 138                 seq_puts(m, " msa");
 139         if (cpu_has_eva)
 140                 seq_puts(m, " eva");
 141         if (cpu_has_htw)
 142                 seq_puts(m, " htw");
 143         if (cpu_has_xpa)
 144                 seq_puts(m, " xpa");
 145         if (cpu_has_loongson_mmi)
 146                 seq_puts(m, " loongson-mmi");
 147         if (cpu_has_loongson_cam)
 148                 seq_puts(m, " loongson-cam");
 149         if (cpu_has_loongson_ext)
 150                 seq_puts(m, " loongson-ext");
 151         if (cpu_has_loongson_ext2)
 152                 seq_puts(m, " loongson-ext2");
 153         seq_puts(m, "\n");
 154
 155         if (cpu_has_mmips) {
 156                 seq_printf(m, "micromips kernel\t: %s\n",
 157                       str_yes_no(read_c0_config3() & MIPS_CONF3_ISA_OE));
 158         }
 159
 160         seq_puts(m, "Options implemented\t:");
 161         if (cpu_has_tlb)
 162                 seq_puts(m, " tlb");
 163         if (cpu_has_ftlb)
 164                 seq_puts(m, " ftlb");
 165         if (cpu_has_tlbinv)
 166                 seq_puts(m, " tlbinv");
 167         if (cpu_has_segments)
 168                 seq_puts(m, " segments");
 169         if (cpu_has_rixiex)
 170                 seq_puts(m, " rixiex");
 171         if (cpu_has_ldpte)
 172                 seq_puts(m, " ldpte");
 173         if (cpu_has_maar)
 174                 seq_puts(m, " maar");
 175         if (cpu_has_rw_llb)
 176                 seq_puts(m, " rw_llb");
 177         if (cpu_has_4kex)
 178                 seq_puts(m, " 4kex");
 179         if (cpu_has_3k_cache)
 180                 seq_puts(m, " 3k_cache");
 181         if (cpu_has_4k_cache)
 182                 seq_puts(m, " 4k_cache");
 183         if (cpu_has_octeon_cache)
 184                 seq_puts(m, " octeon_cache");
 185         if (raw_cpu_has_fpu)
 186                 seq_puts(m, " fpu");
 187         if (cpu_has_32fpr)
 188                 seq_puts(m, " 32fpr");
 189         if (cpu_has_cache_cdex_p)
 190                 seq_puts(m, " cache_cdex_p");
 191         if (cpu_has_cache_cdex_s)
 192                 seq_puts(m, " cache_cdex_s");
 193         if (cpu_has_prefetch)
 194                 seq_puts(m, " prefetch");
 195         if (cpu_has_mcheck)
 196                 seq_puts(m, " mcheck");
 197         if (cpu_has_ejtag)
 198                 seq_puts(m, " ejtag");
 199         if (cpu_has_llsc)
 200                 seq_puts(m, " llsc");
 201         if (cpu_has_guestctl0ext)
 202                 seq_puts(m, " guestctl0ext");
 203         if (cpu_has_guestctl1)
 204                 seq_puts(m, " guestctl1");
 205         if (cpu_has_guestctl2)
 206                 seq_puts(m, " guestctl2");
 207         if (cpu_has_guestid)
 208                 seq_puts(m, " guestid");
 209         if (cpu_has_drg)
 210                 seq_puts(m, " drg");
 211         if (cpu_has_rixi)
 212                 seq_puts(m, " rixi");
 213         if (cpu_has_lpa)
 214                 seq_puts(m, " lpa");
 215         if (cpu_has_mvh)
 216                 seq_puts(m, " mvh");
 217         if (cpu_has_vtag_icache)
 218                 seq_puts(m, " vtag_icache");
 219         if (cpu_has_dc_aliases)
 220                 seq_puts(m, " dc_aliases");
 221         if (cpu_has_ic_fills_f_dc)
 222                 seq_puts(m, " ic_fills_f_dc");
 223         if (cpu_has_pindexed_dcache)
 224                 seq_puts(m, " pindexed_dcache");
 225         if (cpu_has_userlocal)
 226                 seq_puts(m, " userlocal");
 227         if (cpu_has_nofpuex)
 228                 seq_puts(m, " nofpuex");
 229         if (cpu_has_vint)
 230                 seq_puts(m, " vint");
 231         if (cpu_has_veic)
 232                 seq_puts(m, " veic");
 233         if (cpu_has_inclusive_pcaches)
 234                 seq_puts(m, " inclusive_pcaches");
 235         if (cpu_has_perf_cntr_intr_bit)
 236                 seq_puts(m, " perf_cntr_intr_bit");
 237         if (cpu_has_ufr)
 238                 seq_puts(m, " ufr");
 239         if (cpu_has_fre)
 240                 seq_puts(m, " fre");
 241         if (cpu_has_cdmm)
 242                 seq_puts(m, " cdmm");
 243         if (cpu_has_small_pages)
 244                 seq_puts(m, " small_pages");
 245         if (cpu_has_nan_legacy)
 246                 seq_puts(m, " nan_legacy");
 247         if (cpu_has_nan_2008)
 248                 seq_puts(m, " nan_2008");
 249         if (cpu_has_ebase_wg)
 250                 seq_puts(m, " ebase_wg");
 251         if (cpu_has_badinstr)
 252                 seq_puts(m, " badinstr");
 253         if (cpu_has_badinstrp)
 254                 seq_puts(m, " badinstrp");
 255         if (cpu_has_contextconfig)
 256                 seq_puts(m, " contextconfig");
 257         if (cpu_has_perf)
 258                 seq_puts(m, " perf");
 259         if (cpu_has_mac2008_only)
 260                 seq_puts(m, " mac2008_only");
 261         if (cpu_has_ftlbparex)
 262                 seq_puts(m, " ftlbparex");
 263         if (cpu_has_gsexcex)
 264                 seq_puts(m, " gsexcex");
 265         if (cpu_has_shared_ftlb_ram)
 266                 seq_puts(m, " shared_ftlb_ram");
 267         if (cpu_has_shared_ftlb_entries)
 268                 seq_puts(m, " shared_ftlb_entries");
 269         if (cpu_has_mipsmt_pertccounters)
 270                 seq_puts(m, " mipsmt_pertccounters");
 271         if (cpu_has_mmid)
 272                 seq_puts(m, " mmid");
 273         if (cpu_has_mm_sysad)
 274                 seq_puts(m, " mm_sysad");
 275         if (cpu_has_mm_full)
 276                 seq_puts(m, " mm_full");
 277         seq_puts(m, "\n");
 278
 279         seq_printf(m, "shadow register sets\t: %d\n",
 280                       cpu_data[n].srsets);
 281         seq_printf(m, "kscratch registers\t: %d\n",
 282                       hweight8(cpu_data[n].kscratch_mask));
 283         seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);
 284         seq_printf(m, "core\t\t\t: %d\n", cpu_core(&cpu_data[n]));
 285
 286 #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
 287         if (cpu_has_mipsmt)
 288                 seq_printf(m, "VPE\t\t\t: %d\n", cpu_vpe_id(&cpu_data[n]));
 289         else if (cpu_has_vp)
 290                 seq_printf(m, "VP\t\t\t: %d\n", cpu_vpe_id(&cpu_data[n]));
 291 #endif
 292
 293         sprintf(fmt, "VCE%%c exceptions\t\t: %s\n",
 294                       cpu_has_vce ? "%u" : "not available");
 295         seq_printf(m, fmt, 'D', vced_count);
 296         seq_printf(m, fmt, 'I', vcei_count);
 297
 298         proc_cpuinfo_notifier_args.m = m;
 299         proc_cpuinfo_notifier_args.n = n;
 300
 301         raw_notifier_call_chain(&proc_cpuinfo_chain, 0,
 302                                 &proc_cpuinfo_notifier_args);
 303
 304         seq_puts(m, "\n");
 305
 306         return 0;
 307 }
 308
 309 static void *c_start(struct seq_file *m, loff_t *pos)
 310 {
 311         unsigned long i = *pos;
 312
 313         return i < nr_cpu_ids ? (void *) (i + 1) : NULL;
 314 }
 315
 316 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 317 {
 318         ++*pos;
 319         return c_start(m, pos);
 320 }
 321
 322 static void c_stop(struct seq_file *m, void *v)
 323 {
 324 }
 325
 326 const struct seq_operations cpuinfo_op = {
 327         .start  = c_start,
 328         .next   = c_next,
 329         .stop   = c_stop,
 330         .show   = show_cpuinfo,
 331 };