target/linux/mpc83xx/patches-2.6.36/022-boot_rb333.patch

   1 --- /dev/null
   2 +++ b/arch/powerpc/boot/rb333.c
   3 @@ -0,0 +1,73 @@
   4 +/*
   5 + * The RouterBOARD platform -- for booting RB333 RouterBOARDs.
   6 + *
   7 + * Author: Alexandros C. Couloumbis  <alex@ozo.com>
   8 + * Author: Michael Guntsche <mike@it-loops.com>
   9 + *
  10 + * Copyright (c) 2010 Alexandros C. Couloumbis
  11 + * Copyright (c) 2009 Michael Guntsche
  12 + *
  13 + * This program is free software; you can redistribute it and/or modify it
  14 + * under the terms of the GNU General Public License version 2 as published
  15 + * by the Free Software Foundation.
  16 + */
  17 +
  18 +#include "ops.h"
  19 +#include "types.h"
  20 +#include "io.h"
  21 +#include "stdio.h"
  22 +#include <libfdt.h>
  23 +
  24 +BSS_STACK(4*1024);
  25 +
  26 +u64 memsize64;
  27 +const void *fw_dtb;
  28 +
  29 +static void rb333_fixups(void)
  30 +{
  31 +       const u32 *reg, *timebase, *clock;
  32 +       int node, size;
  33 +       void *chosen;
  34 +       const char* bootargs;
  35 +
  36 +       dt_fixup_memory(0, memsize64);
  37 +
  38 +       /* Find the CPU timebase and clock frequencies. */
  39 +       node = fdt_node_offset_by_prop_value(fw_dtb, -1, "device_type", "cpu", sizeof("cpu"));
  40 +       timebase = fdt_getprop(fw_dtb, node, "timebase-frequency", &size);
  41 +       clock = fdt_getprop(fw_dtb, node, "clock-frequency", &size);
  42 +       dt_fixup_cpu_clocks(*clock, *timebase, 0);
  43 +
  44 +       /* Fixup chosen
  45 +        * The bootloader reads the kernelparm segment and adds the content to
  46 +        * bootargs. This is needed to specify root and other boot flags.
  47 +        */
  48 +       chosen = finddevice("/chosen");
  49 +       node = fdt_path_offset(fw_dtb, "/chosen");
  50 +       bootargs = fdt_getprop(fw_dtb, node, "bootargs", &size);
  51 +       setprop_str(chosen, "bootargs", bootargs);
  52 +}
  53 +
  54 +void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  55 +                  unsigned long r6, unsigned long r7)
  56 +{
  57 +       const u32 *reg;
  58 +       int node, size;
  59 +
  60 +       fw_dtb = (const void *)r3;
  61 +
  62 +       /* Find the memory range. */
  63 +       node = fdt_node_offset_by_prop_value(fw_dtb, -1, "device_type", "memory", sizeof("memory"));
  64 +       reg = fdt_getprop(fw_dtb, node, "reg", &size);
  65 +       memsize64 = reg[1];
  66 +
  67 +       /* Now we have the memory size; initialize the heap. */
  68 +       simple_alloc_init(_end, memsize64 - (unsigned long)_end, 32, 64);
  69 +
  70 +       /* Prepare the device tree and find the console. */
  71 +       fdt_init(_dtb_start);
  72 +       serial_console_init();
  73 +
  74 +       /* Remaining fixups... */
  75 +       platform_ops.fixups = rb333_fixups;
  76 +}