Linux Kernel  3.7.1
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redboot-8xx.c
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1 /*
2  * RedBoot firmware support
3  *
4  * Author: Scott Wood <[email protected]>
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 
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 
49  bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
50  32, 64);
51 
54  platform_ops.fixups = platform_fixups;
55 
56  loader_info.cmdline = (char *)bd.bi_cmdline;
58 }