OpenWrt – Blame information for rev 2

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1 office 1 /*
2 * Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
3 *
4 * based on work of rb532 prom.c
5 * Copyright (C) 2003, Peter Sadik <peter.sadik@idt.com>
6 * Copyright (C) 2005-2006, P.Christeas <p_christ@hol.gr>
7 * Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org>
8 * Felix Fietkau <nbd@nbd.name>
9 * Florian Fainelli <florian@openwrt.org>
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15  
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/types.h>
19 #include <linux/console.h>
20 #include <linux/string.h>
21 #include <linux/serial_core.h>
22 #include <asm/bootinfo.h>
23 #include <adm8668.h>
24 #include "u-boot.h"
25  
26 register volatile struct global_data *gd asm ("k0");
27  
28 void __init prom_free_prom_memory(void)
29 {
30 /* No prom memory to free */
31 }
32  
33 static inline int match_tag(char *arg, const char *tag)
34 {
35 return strncmp(arg, tag, strlen(tag)) == 0;
36 }
37  
38 static inline unsigned long tag2ul(char *arg, const char *tag)
39 {
40 char *num;
41  
42 num = arg + strlen(tag);
43 return simple_strtoul(num, 0, 10);
44 }
45  
46 void __init prom_setup_cmdline(void)
47 {
48 char *cp;
49 int prom_argc;
50 char **prom_argv;
51 int i;
52  
53 prom_argc = fw_arg0;
54 prom_argv = (char **)KSEG0ADDR(fw_arg1);
55  
56 cp = &(arcs_cmdline[0]);
57 for (i = 1; i < prom_argc; i++) {
58 prom_argv[i] = (char *)KSEG0ADDR(prom_argv[i]);
59  
60 /* default bootargs has "console=/dev/ttyS0" yet console won't
61 * show up at all if you include the '/dev/' nowadays ... */
62 if (match_tag(prom_argv[i], "console=/dev/")) {
63 char *ptr = prom_argv[i] + strlen("console=/dev/");
64  
65 strcpy(cp, "console=");
66 cp += strlen("console=");
67 strcpy(cp, ptr);
68 cp += strlen(ptr);
69 *cp++ = ' ';
70 continue;
71 }
72 strcpy(cp, prom_argv[i]);
73 cp += strlen(prom_argv[i]);
74 *cp++ = ' ';
75 }
76 if (prom_argc > 1)
77 --cp; /* trailing space */
78  
79 *cp = '\0';
80 }
81  
82 void __init prom_init(void)
83 {
84 bd_t *bd = gd->bd;
85 int memsize;
86  
87 memsize = bd->bi_memsize;
88 printk("Board info:\n");
89 printk(" RAM size: %d MB\n", (int)memsize/(1024*1024));
90 printk(" NOR start: %#lx\n", bd->bi_flashstart);
91 printk(" NOR size: %#lx\n", bd->bi_flashsize);
92  
93 prom_setup_cmdline();
94 add_memory_region(0, memsize, BOOT_MEM_RAM);
95 }