Linux Kernel  3.7.1
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redboot-83xx.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  * 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 
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 
51  bd.bi_memstart + bd.bi_memsize - (unsigned long)_end,
52  32, 64);
53 
56  platform_ops.fixups = platform_fixups;
57 
58  loader_info.cmdline = (char *)bd.bi_cmdline;
60 }