Linux Kernel  3.7.1
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prom.c
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1 /*
2  * Atheros AR71XX/AR724X/AR913X specific prom routines
3  *
4  * Copyright (C) 2008-2010 Gabor Juhos <[email protected]>
5  * Copyright (C) 2008 Imre Kaloz <[email protected]>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License version 2 as published
9  * by the Free Software Foundation.
10  */
11 
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/io.h>
15 #include <linux/string.h>
16 
17 #include <asm/bootinfo.h>
18 #include <asm/addrspace.h>
19 
20 #include "common.h"
21 
22 static inline int is_valid_ram_addr(void *addr)
23 {
24  if (((u32) addr > KSEG0) &&
25  ((u32) addr < (KSEG0 + ATH79_MEM_SIZE_MAX)))
26  return 1;
27 
28  if (((u32) addr > KSEG1) &&
29  ((u32) addr < (KSEG1 + ATH79_MEM_SIZE_MAX)))
30  return 1;
31 
32  return 0;
33 }
34 
35 static __init void ath79_prom_init_cmdline(int argc, char **argv)
36 {
37  int i;
38 
39  if (!is_valid_ram_addr(argv))
40  return;
41 
42  for (i = 0; i < argc; i++)
43  if (is_valid_ram_addr(argv[i])) {
44  strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
45  strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
46  }
47 }
48 
49 void __init prom_init(void)
50 {
51  ath79_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
52 }
53 
55 {
56  /* We do not have to prom memory to free */
57 }