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
platform_fixups(void)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
platform_init(unsigned long r3,unsigned long r4,unsigned long r5,unsigned long r6,unsigned long r7)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 }
61