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mb.c

/*
 * CPU-version specific code
 *
 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
 * Copyright (C) 2006-2009 PetaLogix
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/init.h>
#include <linux/string.h>
#include <linux/seq_file.h>
#include <linux/cpu.h>
#include <linux/initrd.h>

#include <linux/bug.h>
#include <asm/cpuinfo.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/page.h>
#include <linux/param.h>
#include <asm/pvr.h>
#include <asm/sections.h>
#include <asm/setup.h>

static int show_cpuinfo(struct seq_file *m, void *v)
{
      int count = 0;
      char *fpga_family = "Unknown";
      char *cpu_ver = "Unknown";
      int i;

      /* Denormalised to get the fpga family string */
      for (i = 0; family_string_lookup[i].s != NULL; i++) {
            if (cpuinfo.fpga_family_code == family_string_lookup[i].k) {
                  fpga_family = (char *)family_string_lookup[i].s;
                  break;
            }
      }

      /* Denormalised to get the hw version string */
      for (i = 0; cpu_ver_lookup[i].s != NULL; i++) {
            if (cpuinfo.ver_code == cpu_ver_lookup[i].k) {
                  cpu_ver = (char *)cpu_ver_lookup[i].s;
                  break;
            }
      }

      count = seq_printf(m,
                  "CPU-Family:      MicroBlaze\n"
                  "FPGA-Arch: %s\n"
                  "CPU-Ver:   %s\n"
                  "CPU-MHz:   %d.%02d\n"
                  "BogoMips:  %lu.%02lu\n",
                  fpga_family,
                  cpu_ver,
                  cpuinfo.cpu_clock_freq /
                  1000000,
                  cpuinfo.cpu_clock_freq %
                  1000000,
                  loops_per_jiffy / (500000 / HZ),
                  (loops_per_jiffy / (5000 / HZ)) % 100);

      count += seq_printf(m,
            "HW:\n Shift:\t\t%s\n"
            " MSR:\t\t%s\n"
            " PCMP:\t\t%s\n"
            " DIV:\t\t%s\n",
            (cpuinfo.use_instr & PVR0_USE_BARREL_MASK) ? "yes" : "no",
            (cpuinfo.use_instr & PVR2_USE_MSR_INSTR) ? "yes" : "no",
            (cpuinfo.use_instr & PVR2_USE_PCMP_INSTR) ? "yes" : "no",
            (cpuinfo.use_instr & PVR0_USE_DIV_MASK) ? "yes" : "no");

      count += seq_printf(m,
                  " MMU:\t\t%x\n",
                  cpuinfo.mmu);

      count += seq_printf(m,
            " MUL:\t\t%s\n"
            " FPU:\t\t%s\n",
            (cpuinfo.use_mult & PVR2_USE_MUL64_MASK) ? "v2" :
                  (cpuinfo.use_mult & PVR0_USE_HW_MUL_MASK) ? "v1" : "no",
            (cpuinfo.use_fpu & PVR2_USE_FPU2_MASK) ? "v2" :
                  (cpuinfo.use_fpu & PVR0_USE_FPU_MASK) ? "v1" : "no");

      count += seq_printf(m,
            " Exc:\t\t%s%s%s%s%s%s%s%s\n",
            (cpuinfo.use_exc & PVR2_OPCODE_0x0_ILL_MASK) ? "op0x0 " : "",
            (cpuinfo.use_exc & PVR2_UNALIGNED_EXC_MASK) ? "unal " : "",
            (cpuinfo.use_exc & PVR2_ILL_OPCODE_EXC_MASK) ? "ill " : "",
            (cpuinfo.use_exc & PVR2_IOPB_BUS_EXC_MASK) ? "iopb " : "",
            (cpuinfo.use_exc & PVR2_DOPB_BUS_EXC_MASK) ? "dopb " : "",
            (cpuinfo.use_exc & PVR2_DIV_ZERO_EXC_MASK) ? "zero " : "",
            (cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "",
            (cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : "");

      if (cpuinfo.use_icache)
            count += seq_printf(m,
                        "Icache:\t\t%ukB\n",
                        cpuinfo.icache_size >> 10);
      else
            count += seq_printf(m, "Icache:\t\tno\n");

      if (cpuinfo.use_dcache)
            count += seq_printf(m,
                        "Dcache:\t\t%ukB\n",
                        cpuinfo.dcache_size >> 10);
      else
            count += seq_printf(m, "Dcache:\t\tno\n");

      count += seq_printf(m,
                  "HW-Debug:\t%s\n",
                  cpuinfo.hw_debug ? "yes" : "no");

      count += seq_printf(m,
                  "PVR-USR1:\t%02x\n"
                  "PVR-USR2:\t%08x\n",
                  cpuinfo.pvr_user1,
                  cpuinfo.pvr_user2);

      return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
      int i = *pos;

      return i < NR_CPUS ? (void *) (i + 1) : NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
      ++*pos;
      return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

const struct seq_operations cpuinfo_op = {
      .start = c_start,
      .next = c_next,
      .stop = c_stop,
      .show = show_cpuinfo,
};

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