Merge branches 'tracing/ftrace', 'tracing/ring-buffer' and 'tracing/urgent' into...
[linux-2.6] / arch / powerpc / boot / redboot-8xx.c
1 /*
2  * RedBoot firmware support
3  *
4  * Author: Scott Wood <scottwood@freescale.com>
5  *
6  * Copyright (c) 2007 Freescale Semiconductor, Inc.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License version 2 as published
10  * by the Free Software Foundation.
11  */
12
13 #include "ops.h"
14 #include "stdio.h"
15 #include "redboot.h"
16 #include "fsl-soc.h"
17 #include "io.h"
18
19 static bd_t bd;
20 BSS_STACK(4096);
21
22 #define MHZ(x)  ((x + 500000) / 1000000)
23
24 static void platform_fixups(void)
25 {
26         void *node;
27
28         dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
29         dt_fixup_mac_addresses(bd.bi_enetaddr);
30         dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq);
31
32         node = finddevice("/soc/cpm/brg");
33         if (node) {
34                 printf("BRG clock-frequency <- 0x%x (%dMHz)\r\n",
35                        bd.bi_busfreq, MHZ(bd.bi_busfreq));
36                 setprop(node, "clock-frequency",  &bd.bi_busfreq, 4);
37         }
38 }
39
40 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
41                    unsigned long r6, unsigned long r7)
42 {
43         memcpy(&bd, (char *)r3, sizeof(bd));
44
45         if (bd.bi_tag != 0x42444944)
46                 return;
47
48         simple_alloc_init(_end,
49                           bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
50                           32, 64);
51
52         fdt_init(_dtb_start);
53         serial_console_init();
54         platform_ops.fixups = platform_fixups;
55
56         loader_info.cmdline = (char *)bd.bi_cmdline;
57         loader_info.cmdline_len = strlen((char *)bd.bi_cmdline);
58 }