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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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.
*
* Copyright (C) 2005 Wu Qi Ming infineon
* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/bootmem.h>
#include <asm/bootinfo.h>
#include <ifxmips.h>
static char buf[1024]; /* for prom_printf() */
/* for voice cpu (MIPS24K) */
unsigned int *prom_cp1_base;
unsigned int prom_cp1_size;
/* for Multithreading (APRP) on MIPS34K */
unsigned long physical_memsize;
/* early printk on asc0 or asc1 ? */
#ifdef CONFIG_IFXMIPS_PROM_ASC0
#define IFXMIPS_ASC_DIFF 0
#else
#define IFXMIPS_ASC_DIFF IFXMIPS_ASC_BASE_DIFF
#endif
static inline u32 asc_r32(unsigned long r)
{
return ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
}
static inline void asc_w32(u32 v, unsigned long r)
{
ifxmips_w32(v, (u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
}
void prom_free_prom_memory(void)
{
}
void prom_putchar(char c)
{
unsigned long flags;
local_irq_save(flags);
while ((asc_r32(IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF)
;
if (c == '\n')
asc_w32('\r', IFXMIPS_ASC_TBUF);
asc_w32(c, IFXMIPS_ASC_TBUF);
local_irq_restore(flags);
}
void prom_printf(const char *fmt, ...)
{
va_list args;
int l;
char *p, *buf_end;
va_start(args, fmt);
l = vsprintf(buf, fmt, args);
va_end(args);
buf_end = buf + l;
for (p = buf; p < buf_end; p++)
prom_putchar(*p);
}
unsigned int *prom_get_cp1_base(void)
{
return prom_cp1_base;
}
EXPORT_SYMBOL(prom_get_cp1_base);
unsigned int prom_get_cp1_size(void)
{
/* return size im MB */
return prom_cp1_size>>20;
}
EXPORT_SYMBOL(prom_get_cp1_size);
void __init prom_init(void)
{
int argc = fw_arg0;
char **argv = (char **) fw_arg1;
char **envp = (char **) fw_arg2;
int memsize = 16; /* assume 16M as default */
int i;
mips_machtype = MACH_INFINEON_IFXMIPS;
if (argc) {
argv = (char **)KSEG1ADDR((unsigned long)argv);
arcs_cmdline[0] = '\0';
for (i = 1; i < argc; i++) {
char *a = (char *)KSEG1ADDR(argv[i]);
if (!argv[i])
continue;
/* for voice cpu on Twinpass/Danube */
if (cpu_data[0].cputype == CPU_24K)
if (!strncmp(a, "cp1_size=", 9)) {
prom_cp1_size = memparse(a + 9, &a);
continue;
}
if (strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline)) {
prom_printf("cmdline overflow, skipping: %s\n", a);
break;
}
strcat(arcs_cmdline, a);
strcat(arcs_cmdline, " ");
}
if (!*arcs_cmdline)
strcpy(&(arcs_cmdline[0]),
"console=ttyS0,115200 rootfstype=squashfs,jffs2");
}
envp = (char **)KSEG1ADDR((unsigned long)envp);
while (*envp) {
char *e = (char *)KSEG1ADDR(*envp);
if (!strncmp(e, "memsize=", 8)) {
e += 8;
memsize = simple_strtoul(e, NULL, 10);
}
envp++;
}
memsize *= 1024 * 1024;
/* only on Twinpass/Danube a second CPU is used for Voice */
if ((cpu_data[0].cputype == CPU_24K) && (prom_cp1_size)) {
memsize -= prom_cp1_size;
prom_cp1_base = (unsigned int *)KSEG1ADDR(memsize);
prom_printf("Using %dMB Ram and reserving %dMB for cp1\n",
memsize>>20, prom_cp1_size>>20);
}
add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
}
|
