release/src-rt-6.x/linux/linux-2.6/arch/powerpc/boot/cuboot-83xx.c

   1 /*
   2  * Old U-boot compatibility for 83xx
   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
  16 #define TARGET_83xx
  17 #include "ppcboot.h"
  18
  19 static bd_t bd;
  20 extern char _end[];
  21 extern char _dtb_start[], _dtb_end[];
  22
  23 static void platform_fixups(void)
  24 {
  25         void *soc;
  26
  27         dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  28         dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr);
  29         dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
  30
  31         /* Unfortunately, the specific model number is encoded in the
  32          * soc node name in existing dts files -- once that is fixed,
  33          * this can do a simple path lookup.
  34          */
  35         soc = find_node_by_devtype(NULL, "soc");
  36         if (soc) {
  37                 void *serial = NULL;
  38
  39                 setprop(soc, "bus-frequency", &bd.bi_busfreq,
  40                         sizeof(bd.bi_busfreq));
  41
  42                 while ((serial = find_node_by_devtype(serial, "serial"))) {
  43                         if (get_parent(serial) != soc)
  44                                 continue;
  45
  46                         setprop(serial, "clock-frequency", &bd.bi_busfreq,
  47                                 sizeof(bd.bi_busfreq));
  48                 }
  49         }
  50 }
  51
  52 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  53                    unsigned long r6, unsigned long r7)
  54 {
  55         unsigned long end_of_ram = bd.bi_memstart + bd.bi_memsize;
  56         unsigned long avail_ram = end_of_ram - (unsigned long)_end;
  57
  58         memcpy(&bd, (bd_t *)r3, sizeof(bd));
  59         loader_info.initrd_addr = r4;
  60         loader_info.initrd_size = r4 ? r5 - r4 : 0;
  61         loader_info.cmdline = (char *)r6;
  62         loader_info.cmdline_len = r7 - r6;
  63
  64         simple_alloc_init(_end, avail_ram - 1024*1024, 32, 64);
  65         ft_init(_dtb_start, _dtb_end - _dtb_start, 32);
  66         serial_console_init();
  67         platform_ops.fixups = platform_fixups;
  68 }