1 /*
2 *
3 * BRIEF MODULE DESCRIPTION
4 * PROM library initialisation code, assuming a version of
5 * pmon is the boot code.
6 *
7 * Copyright 2000 MontaVista Software Inc.
8 * Author: MontaVista Software, Inc.
9 * ppopov@mvista.com or source@mvista.com
10 *
11 * This file was derived from Carsten Langgaard's
12 * arch/mips/mips-boards/xx files.
13 *
14 * Carsten Langgaard, carstenl@mips.com
15 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
16 *
17 * This program is free software; you can redistribute it and/or modify it
18 * under the terms of the GNU General Public License as published by the
19 * Free Software Foundation; either version 2 of the License, or (at your
20 * option) any later version.
21 *
22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
25 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 * You should have received a copy of the GNU General Public License along
34 * with this program; if not, write to the Free Software Foundation, Inc.,
35 * 675 Mass Ave, Cambridge, MA 02139, USA.
36 */
37
38 #include <linux/config.h>
39 #include <linux/kernel.h>
40 #include <linux/init.h>
41 #include <linux/string.h>
42
43 #include <asm/bootinfo.h>
44
45 /* #define DEBUG_CMDLINE */
46
47 char arcs_cmdline[CL_SIZE];
48 extern int prom_argc;
49 extern char **prom_argv, **prom_envp;
50
51 typedef struct
52 {
53 char *name;
54 /* char *val; */
55 }t_env_var;
56
57
prom_getcmdline(void)58 char * __init prom_getcmdline(void)
59 {
60 return &(arcs_cmdline[0]);
61 }
62
prom_init_cmdline(void)63 void __init prom_init_cmdline(void)
64 {
65 char *cp;
66 int actr;
67
68 actr = 1; /* Always ignore argv[0] */
69
70 cp = &(arcs_cmdline[0]);
71 while(actr < prom_argc) {
72 strcpy(cp, prom_argv[actr]);
73 cp += strlen(prom_argv[actr]);
74 *cp++ = ' ';
75 actr++;
76 }
77 if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
78 --cp;
79 *cp = '\0';
80
81 }
82
83
prom_getenv(char * envname)84 char *prom_getenv(char *envname)
85 {
86 /*
87 * Return a pointer to the given environment variable.
88 * Environment variables are stored in the form of "memsize=64".
89 */
90
91 t_env_var *env = (t_env_var *)prom_envp;
92 int i;
93
94 i = strlen(envname);
95
96 while(env->name) {
97 if(strncmp(envname, env->name, i) == 0) {
98 return(env->name + strlen(envname) + 1);
99 }
100 env++;
101 }
102 return(NULL);
103 }
104
str2hexnum(unsigned char c)105 static inline unsigned char str2hexnum(unsigned char c)
106 {
107 if(c >= '0' && c <= '9')
108 return c - '0';
109 if(c >= 'a' && c <= 'f')
110 return c - 'a' + 10;
111 return 0; /* foo */
112 }
113
page_is_ram(unsigned long pagenr)114 int __init page_is_ram(unsigned long pagenr)
115 {
116 return 1;
117 }
118
prom_free_prom_memory(void)119 void prom_free_prom_memory (void)
120 {
121 }
122
prom_get_memsize(void)123 unsigned long __init prom_get_memsize(void)
124 {
125 char *memsize_str;
126 unsigned int memsize;
127
128 memsize_str = prom_getenv("memsize");
129 if (!memsize_str) {
130 #ifdef CONFIG_MIPS_ITE8172
131 memsize = 32;
132 #elif defined(CONFIG_MIPS_IVR)
133 memsize = 64;
134 #else
135 memsize = 8;
136 #endif
137 printk("memsize unknown: setting to %dMB\n", memsize);
138 } else {
139 printk("memsize: %s\n", memsize_str);
140 memsize = simple_strtol(memsize_str, NULL, 0);
141 }
142 return memsize;
143 }
144