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_puts(m, "]\n");
  84         }
  85
  86         seq_puts(m, "isa\t\t\t:");
  87         if (cpu_has_mips_1)
  88                 seq_puts(m, " mips1");
  89         if (cpu_has_mips_2)
  90                 seq_puts(m, " mips2");
  91         if (cpu_has_mips_3)
  92                 seq_puts(m, " mips3");
  93         if (cpu_has_mips_4)
  94                 seq_puts(m, " mips4");
  95         if (cpu_has_mips_5)
  96                 seq_puts(m, " mips5");
  97         if (cpu_has_mips32r1)
  98                 seq_puts(m, " mips32r1");
  99         if (cpu_has_mips32r2)
 100                 seq_puts(m, " mips32r2");
 101         if (cpu_has_mips32r5)
 102                 seq_puts(m, " mips32r5");
 103         if (cpu_has_mips32r6)
 104                 seq_puts(m, " mips32r6");
 105         if (cpu_has_mips64r1)
 106                 seq_puts(m, " mips64r1");
 107         if (cpu_has_mips64r2)
 108                 seq_puts(m, " mips64r2");
 109         if (cpu_has_mips64r5)
 110                 seq_puts(m, " mips64r5");
 111         if (cpu_has_mips64r6)
 112                 seq_puts(m, " mips64r6");
 113         seq_puts(m, "\n");
 114
 115         seq_puts(m, "ASEs implemented\t:");
 116         if (cpu_has_mips16)
 117                 seq_puts(m, " mips16");
 118         if (cpu_has_mips16e2)
 119                 seq_puts(m, " mips16e2");
 120         if (cpu_has_mdmx)
 121                 seq_puts(m, " mdmx");
 122         if (cpu_has_mips3d)
 123                 seq_puts(m, " mips3d");
 124         if (cpu_has_smartmips)
 125                 seq_puts(m, " smartmips");
 126         if (cpu_has_dsp)
 127                 seq_puts(m, " dsp");
 128         if (cpu_has_dsp2)
 129                 seq_puts(m, " dsp2");
 130         if (cpu_has_dsp3)
 131                 seq_puts(m, " dsp3");
 132         if (cpu_has_mipsmt)
 133                 seq_puts(m, " mt");
 134         if (cpu_has_mmips)
 135                 seq_puts(m, " micromips");
 136         if (cpu_has_vz)
 137                 seq_puts(m, " vz");
 138         if (cpu_has_msa)
 139                 seq_puts(m, " msa");
 140         if (cpu_has_eva)
 141                 seq_puts(m, " eva");
 142         if (cpu_has_htw)
 143                 seq_puts(m, " htw");
 144         if (cpu_has_xpa)
 145                 seq_puts(m, " xpa");
 146         if (cpu_has_loongson_mmi)
 147                 seq_puts(m, " loongson-mmi");
 148         if (cpu_has_loongson_cam)
 149                 seq_puts(m, " loongson-cam");
 150         if (cpu_has_loongson_ext)
 151                 seq_puts(m, " loongson-ext");
 152         if (cpu_has_loongson_ext2)
 153                 seq_puts(m, " loongson-ext2");
 154         seq_puts(m, "\n");
 155
 156         if (cpu_has_mmips) {
 157                 seq_printf(m, "micromips kernel\t: %s\n",
 158                       (read_c0_config3() & MIPS_CONF3_ISA_OE) ?  "yes" : "no");
 159         }
 160
 161         seq_puts(m, "Options implemented\t:");
 162         if (cpu_has_tlb)
 163                 seq_puts(m, " tlb");
 164         if (cpu_has_ftlb)
 165                 seq_puts(m, " ftlb");
 166         if (cpu_has_tlbinv)
 167                 seq_puts(m, " tlbinv");
 168         if (cpu_has_segments)
 169                 seq_puts(m, " segments");
 170         if (cpu_has_rixiex)
 171                 seq_puts(m, " rixiex");
 172         if (cpu_has_ldpte)
 173                 seq_puts(m, " ldpte");
 174         if (cpu_has_maar)
 175                 seq_puts(m, " maar");
 176         if (cpu_has_rw_llb)
 177                 seq_puts(m, " rw_llb");
 178         if (cpu_has_4kex)
 179                 seq_puts(m, " 4kex");
 180         if (cpu_has_3k_cache)
 181                 seq_puts(m, " 3k_cache");
 182         if (cpu_has_4k_cache)
 183                 seq_puts(m, " 4k_cache");
 184         if (cpu_has_octeon_cache)
 185                 seq_puts(m, " octeon_cache");
 186         if (raw_cpu_has_fpu)
 187                 seq_puts(m, " fpu");
 188         if (cpu_has_32fpr)
 189                 seq_puts(m, " 32fpr");
 190         if (cpu_has_cache_cdex_p)
 191                 seq_puts(m, " cache_cdex_p");
 192         if (cpu_has_cache_cdex_s)
 193                 seq_puts(m, " cache_cdex_s");
 194         if (cpu_has_prefetch)
 195                 seq_puts(m, " prefetch");
 196         if (cpu_has_mcheck)
 197                 seq_puts(m, " mcheck");
 198         if (cpu_has_ejtag)
 199                 seq_puts(m, " ejtag");
 200         if (cpu_has_llsc)
 201                 seq_puts(m, " llsc");
 202         if (cpu_has_guestctl0ext)
 203                 seq_puts(m, " guestctl0ext");
 204         if (cpu_has_guestctl1)
 205                 seq_puts(m, " guestctl1");
 206         if (cpu_has_guestctl2)
 207                 seq_puts(m, " guestctl2");
 208         if (cpu_has_guestid)
 209                 seq_puts(m, " guestid");
 210         if (cpu_has_drg)
 211                 seq_puts(m, " drg");
 212         if (cpu_has_rixi)
 213                 seq_puts(m, " rixi");
 214         if (cpu_has_lpa)
 215                 seq_puts(m, " lpa");
 216         if (cpu_has_mvh)
 217                 seq_puts(m, " mvh");
 218         if (cpu_has_vtag_icache)
 219                 seq_puts(m, " vtag_icache");
 220         if (cpu_has_dc_aliases)
 221                 seq_puts(m, " dc_aliases");
 222         if (cpu_has_ic_fills_f_dc)
 223                 seq_puts(m, " ic_fills_f_dc");
 224         if (cpu_has_pindexed_dcache)
 225                 seq_puts(m, " pindexed_dcache");
 226         if (cpu_has_userlocal)
 227                 seq_puts(m, " userlocal");
 228         if (cpu_has_nofpuex)
 229                 seq_puts(m, " nofpuex");
 230         if (cpu_has_vint)
 231                 seq_puts(m, " vint");
 232         if (cpu_has_veic)
 233                 seq_puts(m, " veic");
 234         if (cpu_has_inclusive_pcaches)
 235                 seq_puts(m, " inclusive_pcaches");
 236         if (cpu_has_perf_cntr_intr_bit)
 237                 seq_puts(m, " perf_cntr_intr_bit");
 238         if (cpu_has_ufr)
 239                 seq_puts(m, " ufr");
 240         if (cpu_has_fre)
 241                 seq_puts(m, " fre");
 242         if (cpu_has_cdmm)
 243                 seq_puts(m, " cdmm");
 244         if (cpu_has_small_pages)
 245                 seq_puts(m, " small_pages");
 246         if (cpu_has_nan_legacy)
 247                 seq_puts(m, " nan_legacy");
 248         if (cpu_has_nan_2008)
 249                 seq_puts(m, " nan_2008");
 250         if (cpu_has_ebase_wg)
 251                 seq_puts(m, " ebase_wg");
 252         if (cpu_has_badinstr)
 253                 seq_puts(m, " badinstr");
 254         if (cpu_has_badinstrp)
 255                 seq_puts(m, " badinstrp");
 256         if (cpu_has_contextconfig)
 257                 seq_puts(m, " contextconfig");
 258         if (cpu_has_perf)
 259                 seq_puts(m, " perf");
 260         if (cpu_has_mac2008_only)
 261                 seq_puts(m, " mac2008_only");
 262         if (cpu_has_ftlbparex)
 263                 seq_puts(m, " ftlbparex");
 264         if (cpu_has_gsexcex)
 265                 seq_puts(m, " gsexcex");
 266         if (cpu_has_shared_ftlb_ram)
 267                 seq_puts(m, " shared_ftlb_ram");
 268         if (cpu_has_shared_ftlb_entries)
 269                 seq_puts(m, " shared_ftlb_entries");
 270         if (cpu_has_mipsmt_pertccounters)
 271                 seq_puts(m, " mipsmt_pertccounters");
 272         if (cpu_has_mmid)
 273                 seq_puts(m, " mmid");
 274         if (cpu_has_mm_sysad)
 275                 seq_puts(m, " mm_sysad");
 276         if (cpu_has_mm_full)
 277                 seq_puts(m, " mm_full");
 278         seq_puts(m, "\n");
 279
 280         seq_printf(m, "shadow register sets\t: %d\n",
 281                       cpu_data[n].srsets);
 282         seq_printf(m, "kscratch registers\t: %d\n",
 283                       hweight8(cpu_data[n].kscratch_mask));
 284         seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);
 285         seq_printf(m, "core\t\t\t: %d\n", cpu_core(&cpu_data[n]));
 286
 287 #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
 288         if (cpu_has_mipsmt)
 289                 seq_printf(m, "VPE\t\t\t: %d\n", cpu_vpe_id(&cpu_data[n]));
 290         else if (cpu_has_vp)
 291                 seq_printf(m, "VP\t\t\t: %d\n", cpu_vpe_id(&cpu_data[n]));
 292 #endif
 293
 294         sprintf(fmt, "VCE%%c exceptions\t\t: %s\n",
 295                       cpu_has_vce ? "%u" : "not available");
 296         seq_printf(m, fmt, 'D', vced_count);
 297         seq_printf(m, fmt, 'I', vcei_count);
 298
 299         proc_cpuinfo_notifier_args.m = m;
 300         proc_cpuinfo_notifier_args.n = n;
 301
 302         raw_notifier_call_chain(&proc_cpuinfo_chain, 0,
 303                                 &proc_cpuinfo_notifier_args);
 304
 305         seq_puts(m, "\n");
 306
 307         return 0;
 308 }
 309
 310 static void *c_start(struct seq_file *m, loff_t *pos)
 311 {
 312         unsigned long i = *pos;
 313
 314         return i < NR_CPUS ? (void *) (i + 1) : NULL;
 315 }
 316
 317 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 318 {
 319         ++*pos;
 320         return c_start(m, pos);
 321 }
 322
 323 static void c_stop(struct seq_file *m, void *v)
 324 {
 325 }
 326
 327 const struct seq_operations cpuinfo_op = {
 328         .start  = c_start,
 329         .next   = c_next,
 330         .stop   = c_stop,
 331         .show   = show_cpuinfo,
 332 };