1 /*
2 * Based on Ocelot Linux port, which is
3 * Copyright 2001 MontaVista Software Inc.
4 * Author: jsun@mvista.com or jsun@junsun.net
5 *
6 * Copyright 2003 ICT CAS
7 * Author: Michael Guo <guoyi@ict.ac.cn>
8 *
9 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
10 * Author: Fuxin Zhang, zhangfx@lemote.com
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 */
17 #include <linux/init.h>
18 #include <linux/bootmem.h>
19 #include <asm/bootinfo.h>
20
21 extern unsigned long bus_clock;
22 extern unsigned long cpu_clock_freq;
23 extern unsigned int memsize, highmemsize;
24 extern int putDebugChar(unsigned char byte);
25
26 static int argc;
27 /* pmon passes arguments in 32bit pointers */
28 static int *arg;
29 static int *env;
30
get_system_type(void)31 const char *get_system_type(void)
32 {
33 return "lemote-fulong";
34 }
35
prom_init_cmdline(void)36 void __init prom_init_cmdline(void)
37 {
38 int i;
39 long l;
40
41 /* arg[0] is "g", the rest is boot parameters */
42 arcs_cmdline[0] = '\0';
43 for (i = 1; i < argc; i++) {
44 l = (long)arg[i];
45 if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
46 >= sizeof(arcs_cmdline))
47 break;
48 strcat(arcs_cmdline, ((char *)l));
49 strcat(arcs_cmdline, " ");
50 }
51 }
52
prom_init(void)53 void __init prom_init(void)
54 {
55 long l;
56 argc = fw_arg0;
57 arg = (int *)fw_arg1;
58 env = (int *)fw_arg2;
59
60 prom_init_cmdline();
61
62 if ((strstr(arcs_cmdline, "console=")) == NULL)
63 strcat(arcs_cmdline, " console=ttyS0,115200");
64 if ((strstr(arcs_cmdline, "root=")) == NULL)
65 strcat(arcs_cmdline, " root=/dev/hda1");
66
67 #define parse_even_earlier(res, option, p) \
68 do { \
69 if (strncmp(option, (char *)p, strlen(option)) == 0) \
70 res = simple_strtol((char *)p + strlen(option"="), \
71 NULL, 10); \
72 } while (0)
73
74 l = (long)*env;
75 while (l != 0) {
76 parse_even_earlier(bus_clock, "busclock", l);
77 parse_even_earlier(cpu_clock_freq, "cpuclock", l);
78 parse_even_earlier(memsize, "memsize", l);
79 parse_even_earlier(highmemsize, "highmemsize", l);
80 env++;
81 l = (long)*env;
82 }
83 if (memsize == 0)
84 memsize = 256;
85
86 pr_info("busclock=%ld, cpuclock=%ld,memsize=%d,highmemsize=%d\n",
87 bus_clock, cpu_clock_freq, memsize, highmemsize);
88 }
89
prom_free_prom_memory(void)90 void __init prom_free_prom_memory(void)
91 {
92 }
93
prom_putchar(char c)94 void prom_putchar(char c)
95 {
96 putDebugChar(c);
97 }
98