powerpc/mpc5121: Update device tree for MPC5121ADS evaluation board
[linux-2.6] / 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
20 static bd_t bd;
21 BSS_STACK(4096);
22
23 #define MHZ(x)  ((x + 500000) / 1000000)
24
25 static 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
42 void 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 }