LXR linux/arch/powerpc/boot/redboot-83xx.c

   1/*
   2 * RedBoot firmware support
   3 *
   4 * Author: Scott Wood <scottwood@freescale.com>
   5 *
   6 * Copyright (c) 2007 Freescale Semiconductor, Inc.
   7 * Copyright (c) 2008 Codehermit
   8 *
   9 * This program is free software; you can redistribute it and/or modify it
  10 * under the terms of the GNU General Public License version 2 as published
  11 * by the Free Software Foundation.
  12 */
  13
  14#include "ops.h"
  15#include "stdio.h"
  16#include "redboot.h"
  17#include "fsl-soc.h"
  18#include "io.h"
  19
  20static bd_t bd;
  21BSS_STACK(4096);
  22
  23#define MHZ(x)  ((x + 500000) / 1000000)
  24
  25static void platform_fixups(void)
  26{
  27        void *node;
  28
  29        dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  30        dt_fixup_mac_addresses(bd.bi_enetaddr);
  31        dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq);
  32
  33        node = finddevice("/soc/cpm/brg");
  34        if (node) {
  35                printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n",
  36                       bd.bi_busfreq, MHZ(bd.bi_busfreq));
  37                setprop(node, "clock-frequency",  &bd.bi_busfreq, 4);
  38        }
  39
  40}
  41
  42void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  43                   unsigned long r6, unsigned long r7)
  44{
  45        memcpy(&bd, (char *)r3, sizeof(bd));
  46
  47        if (bd.bi_tag != 0x42444944)
  48                return;
  49
  50        simple_alloc_init(_end,
  51                          bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
  52                          32, 64);
  53
  54        fdt_init(_dtb_start);
  55        serial_console_init();
  56        platform_ops.fixups = platform_fixups;
  57
  58        loader_info.cmdline = (char *)bd.bi_cmdline;
  59        loader_info.cmdline_len = strlen((char *)bd.bi_cmdline);
  60}
  61