| 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 | +} |
| 77 | |
