LXR uboot/cpu/nios/cpu.c

   1/*
   2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
   3 * Scott McNutt <smcnutt@psyent.com>
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <common.h>
  25#include <nios.h>
  26
  27
  28int checkcpu (void)
  29{
  30        unsigned val;
  31        unsigned rev_major;
  32        unsigned rev_minor;
  33        short nregs, hi_limit, lo_limit;
  34
  35        /* Get cpu version info */
  36        val = rdctl (CTL_CPU_ID);
  37        puts ("CPU:   ");
  38        printf ("%s", (val & 0x00008000) ? "Nios-16 " : "Nios-32 ");
  39        rev_major = (val>>12) & 0x07;
  40        rev_minor = (val>>4) & 0x0ff;
  41        printf ("Rev. %d.%d (0x%04x)", rev_major, rev_minor,
  42                        val & 0xffff);
  43        if (rev_major == 0x08)
  44                printf (" [OpenCore (R) Plus]");
  45        printf ("\n");
  46
  47        /* Check register file */
  48        val = rdctl (CTL_WVALID);
  49        lo_limit = val & 0x01f;
  50        hi_limit = (val>>5) & 0x1f;
  51        nregs = (hi_limit + 2) * 16;
  52        printf ("Reg file size: %d LO_LIMIT/HI_LIMIT: %d/%d\n",
  53                nregs, lo_limit, hi_limit);
  54
  55        return (0);
  56}
  57
  58
  59int do_reset (void)
  60{
  61        /* trap 0 does the trick ... at least with the OCI debug
  62         * present -- haven't tested without it yet (stm).
  63         */
  64        disable_interrupts ();
  65        ipri (1);
  66        asm volatile ("trap 0\n");
  67
  68        /* No return ;-) */
  69
  70        return(0);
  71}
  72
  73
  74#if defined(CONFIG_WATCHDOG)
  75void watchdog_reset (void)
  76{
  77}
  78#endif /* CONFIG_WATCHDOG */
  79