LXR uboot/arch/arm/cpu/ixp/cpu.c

   1/*
   2 * (C) Copyright 2002
   3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4 * Marius Groeger <mgroeger@sysgo.de>
   5 *
   6 * (C) Copyright 2002
   7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   8 * Alex Zuepke <azu@sysgo.de>
   9 *
  10 * See file CREDITS for list of people who contributed to this
  11 * project.
  12 *
  13 * This program is free software; you can redistribute it and/or
  14 * modify it under the terms of the GNU General Public License as
  15 * published by the Free Software Foundation; either version 2 of
  16 * the License, or (at your option) any later version.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * You should have received a copy of the GNU General Public License
  24 * along with this program; if not, write to the Free Software
  25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  26 * MA 02111-1307 USA
  27 */
  28
  29/*
  30 * CPU specific code
  31 */
  32
  33#include <common.h>
  34#include <command.h>
  35#include <netdev.h>
  36#include <asm/arch/ixp425.h>
  37#include <asm/system.h>
  38
  39static void cache_flush(void);
  40
  41#if defined(CONFIG_DISPLAY_CPUINFO)
  42int print_cpuinfo (void)
  43{
  44        unsigned long id;
  45        int speed = 0;
  46
  47        asm ("mrc p15, 0, %0, c0, c0, 0":"=r" (id));
  48
  49        puts("CPU:   Intel IXP425 at ");
  50        switch ((id & 0x000003f0) >> 4) {
  51        case 0x1c:
  52                speed = 533;
  53                break;
  54
  55        case 0x1d:
  56                speed = 400;
  57                break;
  58
  59        case 0x1f:
  60                speed = 266;
  61                break;
  62        }
  63
  64        if (speed)
  65                printf("%d MHz\n", speed);
  66        else
  67                puts("unknown revision\n");
  68
  69        return 0;
  70}
  71#endif /* CONFIG_DISPLAY_CPUINFO */
  72
  73int cleanup_before_linux (void)
  74{
  75        /*
  76         * this function is called just before we call linux
  77         * it prepares the processor for linux
  78         *
  79         * just disable everything that can disturb booting linux
  80         */
  81
  82        disable_interrupts ();
  83
  84        /* turn off I-cache */
  85        icache_disable();
  86        dcache_disable();
  87
  88        /* flush I-cache */
  89        cache_flush();
  90
  91        return 0;
  92}
  93
  94/* flush I/D-cache */
  95static void cache_flush (void)
  96{
  97        unsigned long i = 0;
  98
  99        asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
 100}
 101
 102/* FIXME */
 103/*
 104void pci_init(void)
 105{
 106        return;
 107}
 108*/
 109
 110#ifdef CONFIG_BOOTCOUNT_LIMIT
 111
 112void bootcount_store (ulong a)
 113{
 114        volatile ulong *save_addr = (volatile ulong *)(CONFIG_SYS_BOOTCOUNT_ADDR);
 115
 116        save_addr[0] = a;
 117        save_addr[1] = BOOTCOUNT_MAGIC;
 118}
 119
 120ulong bootcount_load (void)
 121{
 122        volatile ulong *save_addr = (volatile ulong *)(CONFIG_SYS_BOOTCOUNT_ADDR);
 123
 124        if (save_addr[1] != BOOTCOUNT_MAGIC)
 125                return 0;
 126        else
 127                return save_addr[0];
 128}
 129
 130#endif /* CONFIG_BOOTCOUNT_LIMIT */
 131
 132int cpu_eth_init(bd_t *bis)
 133{
 134#ifdef CONFIG_IXP4XX_NPE
 135        npe_initialize(bis);
 136#endif
 137        return 0;
 138}
 139