6b13f685e
 김민수
BSP 최초 추가
|
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
|
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
*/
#include <linux/init.h>
#include <linux/io.h>
#include <asm/bootinfo.h>
#include <asm/cacheflush.h>
#include <asm/traps.h>
#include <asm/mips-boards/generic.h>
#include <asm/fw/fw.h>
extern char except_vec_nmi;
extern char except_vec_ejtag_debug;
#ifdef CONFIG_SERIAL_8250_CONSOLE
static void __init console_config(void)
{
char console_string[40];
int baud = 0;
char parity = '\0', bits = '\0', flow = '\0';
char *s;
if ((strstr(fw_getcmdline(), "console=")) == NULL) {
s = fw_getenv("modetty0");
if (s) {
while (*s >= '0' && *s <= '9')
baud = baud*10 + *s++ - '0';
if (*s == ',')
s++;
if (*s)
parity = *s++;
if (*s == ',')
s++;
if (*s)
bits = *s++;
if (*s == ',')
s++;
if (*s == 'h')
flow = 'r';
}
if (baud == 0)
baud = 38400;
if (parity != 'n' && parity != 'o' && parity != 'e')
parity = 'n';
if (bits != '7' && bits != '8')
bits = '8';
if (flow == '\0')
flow = 'r';
sprintf(console_string, " console=ttyS0,%d%c%c%c", baud,
parity, bits, flow);
strcat(fw_getcmdline(), console_string);
}
}
#endif
static void __init mips_nmi_setup(void)
{
void *base;
base = cpu_has_veic ?
(void *)(CAC_BASE + 0xa80) :
(void *)(CAC_BASE + 0x380);
#ifdef CONFIG_CPU_MICROMIPS
/*
* Decrement the exception vector address by one for microMIPS.
*/
memcpy(base, (&except_vec_nmi - 1), 0x80);
/*
* This is a hack. We do not know if the boot loader was built with
* microMIPS instructions or not. If it was not, the NMI exception
* code at 0x80000a80 will be taken in MIPS32 mode. The hand coded
* assembly below forces us into microMIPS mode if we are a pure
* microMIPS kernel. The assembly instructions are:
*
* 3C1A8000 lui k0,0x8000
* 375A0381 ori k0,k0,0x381
* 03400008 jr k0
* 00000000 nop
*
* The mode switch occurs by jumping to the unaligned exception
* vector address at 0x80000381 which would have been 0x80000380
* in MIPS32 mode. The jump to the unaligned address transitions
* us into microMIPS mode.
*/
if (!cpu_has_veic) {
void *base2 = (void *)(CAC_BASE + 0xa80);
*((unsigned int *)base2) = 0x3c1a8000;
*((unsigned int *)base2 + 1) = 0x375a0381;
*((unsigned int *)base2 + 2) = 0x03400008;
*((unsigned int *)base2 + 3) = 0x00000000;
flush_icache_range((unsigned long)base2,
(unsigned long)base2 + 0x10);
}
#else
memcpy(base, &except_vec_nmi, 0x80);
#endif
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
static void __init mips_ejtag_setup(void)
{
void *base;
base = cpu_has_veic ?
(void *)(CAC_BASE + 0xa00) :
(void *)(CAC_BASE + 0x300);
#ifdef CONFIG_CPU_MICROMIPS
/* Deja vu... */
memcpy(base, (&except_vec_ejtag_debug - 1), 0x80);
if (!cpu_has_veic) {
void *base2 = (void *)(CAC_BASE + 0xa00);
*((unsigned int *)base2) = 0x3c1a8000;
*((unsigned int *)base2 + 1) = 0x375a0301;
*((unsigned int *)base2 + 2) = 0x03400008;
*((unsigned int *)base2 + 3) = 0x00000000;
flush_icache_range((unsigned long)base2,
(unsigned long)base2 + 0x10);
}
#else
memcpy(base, &except_vec_ejtag_debug, 0x80);
#endif
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
void __init prom_init(void)
{
board_nmi_handler_setup = mips_nmi_setup;
board_ejtag_handler_setup = mips_ejtag_setup;
fw_init_cmdline();
#ifdef CONFIG_EARLY_PRINTK
if ((strstr(fw_getcmdline(), "console=ttyS0")) != NULL)
fw_init_early_console(0);
else if ((strstr(fw_getcmdline(), "console=ttyS1")) != NULL)
fw_init_early_console(1);
#endif
#ifdef CONFIG_SERIAL_8250_CONSOLE
if ((strstr(fw_getcmdline(), "console=")) == NULL)
strcat(fw_getcmdline(), " console=ttyS0,38400n8r");
console_config();
#endif
}
void prom_free_prom_memory(void)
{
}
|