1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*****************************************************************************
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
* Copyright (C) 2003 ADMtek Incorporated.
* daniell@admtek.com.tw
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
*****************************************************************************/
#include <linux/init.h>
#include <linux/autoconf.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <asm/bootinfo.h>
#include <asm/addrspace.h>
#include <adm5120_info.h>
void setup_prom_printf(int);
void prom_printf(char *, ...);
void prom_meminit(void);
#define ADM5120_ENVC 1
char *adm5120_envp[2*ADM5120_ENVC] = {"memsize","0x001000000"};
#define READCSR(r) *(volatile unsigned long *)(0xB2600000+(r))
#define WRITECSR(r,v) *(volatile unsigned long *)(0xB2600000+(r)) = v
#define UART_DR_REG 0x00
#define UART_FR_REG 0x18
#define UART_TX_FIFO_FULL 0x20
int putPromChar(char c)
{
WRITECSR(UART_DR_REG, c);
while ( (READCSR(UART_FR_REG) & UART_TX_FIFO_FULL) );
return 0;
}
/*
* Ugly prom_printf used for debugging
*/
void prom_printf(char *fmt, ...)
{
va_list args;
int l;
char *p, *buf_end;
char buf[1024];
va_start(args, fmt);
l = vsprintf(buf, fmt, args); /* hopefully i < sizeof(buf) */
va_end(args);
buf_end = buf + l;
for (p = buf; p < buf_end; p++) {
/* Crude cr/nl handling is better than none */
if (*p == '\n')
putPromChar('\r');
putPromChar(*p);
}
}
char *prom_getenv(char *envname)
{
int i, index=0;
i = strlen(envname);
printk(KERN_INFO "GETENV: envname is %s\n", envname);
while(index < (2*ADM5120_ENVC)) {
if(strncmp(envname, adm5120_envp[index], i) == 0) {
printk(KERN_INFO "GETENV: returning %s\n", adm5120_envp[index+1]);
return(adm5120_envp[index+1]);
}
index += 2;
}
printk(KERN_INFO "GETENV: not found.\n");
return(NULL);
}
/*
* initialize the prom module.
*/
void __init prom_init(void)
{
/* you should these macros defined in include/asm/bootinfo.h */
mips_machgroup = MACH_GROUP_ADM_GW;
mips_machtype = MACH_ADM_GW_5120;
adm5120_info_init();
/* init command line, register a default kernel command line */
strcpy(&(arcs_cmdline[0]), CONFIG_CMDLINE);
/* init memory map */
prom_meminit();
}
|
