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59d13f9d BD |
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 | } |