LXR uboot/cpu/mpc8220/cpu.c

   1/*
   2 * (C) Copyright 2000-2003
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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/*
  25 * CPU specific code for the MPC8220 CPUs
  26 */
  27
  28#include <common.h>
  29#include <watchdog.h>
  30#include <command.h>
  31#include <mpc8220.h>
  32#include <netdev.h>
  33#include <asm/processor.h>
  34
  35DECLARE_GLOBAL_DATA_PTR;
  36
  37int checkcpu (void)
  38{
  39        ulong clock = gd->cpu_clk;
  40        char buf[32];
  41
  42        puts ("CPU:   ");
  43
  44        printf (CPU_ID_STR);
  45
  46        printf (" (JTAG ID %08lx)", *(vu_long *) (CONFIG_SYS_MBAR + 0x50));
  47
  48        printf (" at %s MHz\n", strmhz (buf, clock));
  49
  50        return 0;
  51}
  52
  53/* ------------------------------------------------------------------------- */
  54
  55int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  56{
  57        volatile gptmr8220_t *gptmr = (volatile gptmr8220_t *) MMAP_GPTMR;
  58        ulong msr;
  59
  60        /* Interrupts and MMU off */
  61        __asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
  62
  63        msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
  64        __asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
  65
  66        /* Charge the watchdog timer */
  67        gptmr->Prescl = 10;
  68        gptmr->Count = 1;
  69
  70        gptmr->Mode = GPT_TMS_SGPIO;
  71
  72        gptmr->Control = GPT_CTRL_WDEN | GPT_CTRL_CE;
  73
  74        return 1;
  75}
  76
  77/* ------------------------------------------------------------------------- */
  78
  79/*
  80 * Get timebase clock frequency (like cpu_clk in Hz)
  81 *
  82 */
  83unsigned long get_tbclk (void)
  84{
  85        ulong tbclk;
  86
  87        tbclk = (gd->bus_clk + 3L) / 4L;
  88
  89        return (tbclk);
  90}
  91
  92/* ------------------------------------------------------------------------- */
  93
  94/*
  95 * Initializes on-chip ethernet controllers.
  96 * to override, implement board_eth_init()
  97 */
  98int cpu_eth_init(bd_t *bis)
  99{
 100#if defined(CONFIG_MPC8220_FEC)
 101        mpc8220_fec_initialize(bis);
 102#endif
 103        return 0;
 104}
 105