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1da177e4 LT |
1 | /* |
2 | * | |
3 | * BRIEF MODULE DESCRIPTION | |
4 | * Cogent CSB250 board setup | |
5 | * | |
6 | * Copyright 2002 Cogent Computer Systems, Inc. | |
7 | * dan@embeddededge.com | |
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 as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
16 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
17 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
20 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
21 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License along | |
26 | * with this program; if not, write to the Free Software Foundation, Inc., | |
27 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | */ | |
29 | ||
30 | #include <linux/init.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/sched.h> | |
33 | #include <linux/bootmem.h> | |
34 | #include <asm/addrspace.h> | |
35 | #include <asm/bootinfo.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/sched.h> | |
39 | ||
40 | int prom_argc; | |
41 | char **prom_argv, **prom_envp; | |
42 | extern void __init prom_init_cmdline(void); | |
43 | extern char *prom_getenv(char *envname); | |
44 | ||
45 | /* When we get initrd working someday......... | |
46 | */ | |
47 | int my_initrd_start, my_initrd_size; | |
48 | ||
49 | /* Start arguments and environment. | |
50 | */ | |
51 | static char *csb_env[2]; | |
52 | static char *csb_arg[4]; | |
53 | static char *arg1 = "console=ttyS3,38400"; | |
54 | static char *arg2 = "root=/dev/nfs rw ip=any"; | |
55 | static char *env1 = "ethaddr=00:30:23:50:00:00"; | |
56 | ||
57 | const char *get_system_type(void) | |
58 | { | |
59 | return "Cogent CSB250"; | |
60 | } | |
61 | ||
62 | int __init prom_init(int argc, char **argv, char **envp, int *prom_vec) | |
63 | { | |
64 | unsigned char *memsize_str; | |
65 | unsigned long memsize; | |
66 | ||
67 | /* We use a0 and a1 to pass initrd start and size. | |
68 | */ | |
69 | if (((uint) argc > 0) && ((uint)argv > 0)) { | |
70 | my_initrd_start = (uint)argc; | |
71 | my_initrd_size = (uint)argv; | |
72 | } | |
73 | ||
74 | /* First argv is ignored. | |
75 | */ | |
76 | prom_argc = 3; | |
77 | prom_argv = csb_arg; | |
78 | prom_envp = csb_env; | |
79 | csb_arg[1] = arg1; | |
80 | csb_arg[2] = arg2; | |
81 | csb_env[0] = env1; | |
82 | ||
83 | mips_machgroup = MACH_GROUP_ALCHEMY; | |
84 | mips_machtype = MACH_CSB250; | |
85 | ||
86 | prom_init_cmdline(); | |
87 | memsize_str = prom_getenv("memsize"); | |
88 | if (!memsize_str) { | |
89 | memsize = 0x02000000; | |
90 | } else { | |
91 | memsize = simple_strtol(memsize_str, NULL, 0); | |
92 | } | |
93 | add_memory_region(0, memsize, BOOT_MEM_RAM); | |
94 | return 0; | |
95 | } |