LXR linux/arch/powerpc/boot/redboot-8xx.c

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