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proc.c

#include <linux/smp.h>
#include <linux/timex.h>
#include <linux/string.h>
#include <asm/semaphore.h>
#include <linux/seq_file.h>
#include <linux/cpufreq.h>

/*
 *    Get CPU information for use by the procfs.
 */
static int show_cpuinfo(struct seq_file *m, void *v)
{
      /* 
       * These flag bits must match the definitions in <asm/cpufeature.h>.
       * NULL means this bit is undefined or reserved; either way it doesn't
       * have meaning as far as Linux is concerned.  Note that it's important
       * to realize there is a difference between this table and CPUID -- if
       * applications want to get the raw CPUID data, they should access
       * /dev/cpu/<cpu_nr>/cpuid instead.
       */
      static const char * const x86_cap_flags[] = {
            /* Intel-defined */
              "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
              "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
              "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
              "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",

            /* AMD-defined */
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, "mp", "nx", NULL, "mmxext", NULL,
            NULL, "fxsr_opt", "pdpe1gb", "rdtscp", NULL, "lm",
            "3dnowext", "3dnow",

            /* Transmeta-defined */
            "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* Other (Linux-defined) */
            "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
            NULL, NULL, NULL, NULL,
            "constant_tsc", "up", NULL, "arch_perfmon",
            "pebs", "bts", NULL, "sync_rdtsc",
            "rep_good", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* Intel-defined (#2) */
            "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
            "tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
            NULL, NULL, "dca", "sse4_1", "sse4_2", NULL, NULL, "popcnt",
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* VIA/Cyrix/Centaur-defined */
            NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
            "ace2", "ace2_en", "phe", "phe_en", "pmm", "pmm_en", NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* AMD-defined (#2) */
            "lahf_lm", "cmp_legacy", "svm", "extapic",
            "cr8_legacy", "abm", "sse4a", "misalignsse",
            "3dnowprefetch", "osvw", "ibs", "sse5",
            "skinit", "wdt", NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

            /* Auxiliary (Linux-defined) */
            "ida", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
      };
      static const char * const x86_power_flags[] = {
            "ts", /* temperature sensor */
            "fid",  /* frequency id control */
            "vid",  /* voltage id control */
            "ttp",  /* thermal trip */
            "tm",
            "stc",
            "100mhzsteps",
            "hwpstate",
            "",   /* constant_tsc - moved to flags */
            /* nothing */
      };
      struct cpuinfo_x86 *c = v;
      int i, n = 0;
      int fpu_exception;

#ifdef CONFIG_SMP
      n = c->cpu_index;
#endif
      seq_printf(m, "processor\t: %d\n"
            "vendor_id\t: %s\n"
            "cpu family\t: %d\n"
            "model\t\t: %d\n"
            "model name\t: %s\n",
            n,
            c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
            c->x86,
            c->x86_model,
            c->x86_model_id[0] ? c->x86_model_id : "unknown");

      if (c->x86_mask || c->cpuid_level >= 0)
            seq_printf(m, "stepping\t: %d\n", c->x86_mask);
      else
            seq_printf(m, "stepping\t: unknown\n");

      if ( cpu_has(c, X86_FEATURE_TSC) ) {
            unsigned int freq = cpufreq_quick_get(n);
            if (!freq)
                  freq = cpu_khz;
            seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
                  freq / 1000, (freq % 1000));
      }

      /* Cache size */
      if (c->x86_cache_size >= 0)
            seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
#ifdef CONFIG_X86_HT
      if (c->x86_max_cores * smp_num_siblings > 1) {
            seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
            seq_printf(m, "siblings\t: %d\n",
                        cpus_weight(per_cpu(cpu_core_map, n)));
            seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
            seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
      }
#endif
      
      /* We use exception 16 if we have hardware math and we've either seen it or the CPU claims it is internal */
      fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
      seq_printf(m, "fdiv_bug\t: %s\n"
                  "hlt_bug\t\t: %s\n"
                  "f00f_bug\t: %s\n"
                  "coma_bug\t: %s\n"
                  "fpu\t\t: %s\n"
                  "fpu_exception\t: %s\n"
                  "cpuid level\t: %d\n"
                  "wp\t\t: %s\n"
                  "flags\t\t:",
                 c->fdiv_bug ? "yes" : "no",
                 c->hlt_works_ok ? "no" : "yes",
                 c->f00f_bug ? "yes" : "no",
                 c->coma_bug ? "yes" : "no",
                 c->hard_math ? "yes" : "no",
                 fpu_exception ? "yes" : "no",
                 c->cpuid_level,
                 c->wp_works_ok ? "yes" : "no");

      for ( i = 0 ; i < 32*NCAPINTS ; i++ )
            if ( test_bit(i, c->x86_capability) &&
                 x86_cap_flags[i] != NULL )
                  seq_printf(m, " %s", x86_cap_flags[i]);

      for (i = 0; i < 32; i++)
            if (c->x86_power & (1 << i)) {
                  if (i < ARRAY_SIZE(x86_power_flags) &&
                      x86_power_flags[i])
                        seq_printf(m, "%s%s",
                                 x86_power_flags[i][0]?" ":"",
                                 x86_power_flags[i]);
                  else
                        seq_printf(m, " [%d]", i);
            }

      seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
                 c->loops_per_jiffy/(500000/HZ),
                 (c->loops_per_jiffy/(5000/HZ)) % 100);
      seq_printf(m, "clflush size\t: %u\n\n", c->x86_clflush_size);

      return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
      if (*pos == 0)    /* just in case, cpu 0 is not the first */
            *pos = first_cpu(cpu_online_map);
      if ((*pos) < NR_CPUS && cpu_online(*pos))
            return &cpu_data(*pos);
      return NULL;
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
      *pos = next_cpu(*pos, cpu_online_map);
      return c_start(m, pos);
}
static void c_stop(struct seq_file *m, void *v)
{
}
struct seq_operations cpuinfo_op = {
      .start      = c_start,
      .next = c_next,
      .stop = c_stop,
      .show = show_cpuinfo,
};

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