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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
* Author: Fuxin Zhang, zhangfx@lemote.com
* Copyright (C) 2009 Lemote, Inc.
* Author: Zhangjin Wu, wuzhangjin@gmail.com
*/
#include <linux/cpu.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/kexec.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <asm/bootinfo.h>
#include <asm/idle.h>
#include <asm/reboot.h>
#include <asm/bug.h>
#include <loongson.h>
#include <boot_param.h>
static void loongson_restart(char *command)
{
void (*fw_restart)(void) = (void *)loongson_sysconf.restart_addr;
fw_restart();
while (1) {
if (cpu_wait)
cpu_wait();
}
}
static void loongson_poweroff(void)
{
void (*fw_poweroff)(void) = (void *)loongson_sysconf.poweroff_addr;
fw_poweroff();
while (1) {
if (cpu_wait)
cpu_wait();
}
}
static void loongson_halt(void)
{
pr_notice("\n\n** You can safely turn off the power now **\n\n");
while (1) {
if (cpu_wait)
cpu_wait();
}
}
#ifdef CONFIG_KEXEC_CORE
/* 0X80000000~0X80200000 is safe */
#define MAX_ARGS 64
#define KEXEC_CTRL_CODE 0xFFFFFFFF80100000UL
#define KEXEC_ARGV_ADDR 0xFFFFFFFF80108000UL
#define KEXEC_ARGV_SIZE COMMAND_LINE_SIZE
#define KEXEC_ENVP_SIZE 4800
static int kexec_argc;
static int kdump_argc;
static void *kexec_argv;
static void *kdump_argv;
static void *kexec_envp;
static int loongson_kexec_prepare(struct kimage *image)
{
int i, argc = 0;
unsigned int *argv;
char *str, *ptr, *bootloader = "kexec";
/* argv at offset 0, argv[] at offset KEXEC_ARGV_SIZE/2 */
if (image->type == KEXEC_TYPE_DEFAULT)
argv = (unsigned int *)kexec_argv;
else
argv = (unsigned int *)kdump_argv;
argv[argc++] = (unsigned int)(KEXEC_ARGV_ADDR + KEXEC_ARGV_SIZE/2);
for (i = 0; i < image->nr_segments; i++) {
if (!strncmp(bootloader, (char *)image->segment[i].buf,
strlen(bootloader))) {
/*
* convert command line string to array
* of parameters (as bootloader does).
*/
int offt;
str = (char *)argv + KEXEC_ARGV_SIZE/2;
memcpy(str, image->segment[i].buf, KEXEC_ARGV_SIZE/2);
ptr = strchr(str, ' ');
while (ptr && (argc < MAX_ARGS)) {
*ptr = '\0';
if (ptr[1] != ' ') {
offt = (int)(ptr - str + 1);
argv[argc] = KEXEC_ARGV_ADDR + KEXEC_ARGV_SIZE/2 + offt;
argc++;
}
ptr = strchr(ptr + 1, ' ');
}
break;
}
}
if (image->type == KEXEC_TYPE_DEFAULT)
kexec_argc = argc;
else
kdump_argc = argc;
/* kexec/kdump need a safe page to save reboot_code_buffer */
image->control_code_page = virt_to_page((void *)KEXEC_CTRL_CODE);
return 0;
}
static void loongson_kexec_shutdown(void)
{
#ifdef CONFIG_SMP
int cpu;
/* All CPUs go to reboot_code_buffer */
for_each_possible_cpu(cpu)
if (!cpu_online(cpu))
cpu_device_up(get_cpu_device(cpu));
secondary_kexec_args[0] = TO_UNCAC(0x3ff01000);
#endif
kexec_args[0] = kexec_argc;
kexec_args[1] = fw_arg1;
kexec_args[2] = fw_arg2;
memcpy((void *)fw_arg1, kexec_argv, KEXEC_ARGV_SIZE);
memcpy((void *)fw_arg2, kexec_envp, KEXEC_ENVP_SIZE);
}
static void loongson_crash_shutdown(struct pt_regs *regs)
{
default_machine_crash_shutdown(regs);
kexec_args[0] = kdump_argc;
kexec_args[1] = fw_arg1;
kexec_args[2] = fw_arg2;
#ifdef CONFIG_SMP
secondary_kexec_args[0] = TO_UNCAC(0x3ff01000);
#endif
memcpy((void *)fw_arg1, kdump_argv, KEXEC_ARGV_SIZE);
memcpy((void *)fw_arg2, kexec_envp, KEXEC_ENVP_SIZE);
}
#endif
static int __init mips_reboot_setup(void)
{
_machine_restart = loongson_restart;
_machine_halt = loongson_halt;
pm_power_off = loongson_poweroff;
#ifdef CONFIG_KEXEC_CORE
kexec_argv = kmalloc(KEXEC_ARGV_SIZE, GFP_KERNEL);
if (WARN_ON(!kexec_argv))
return -ENOMEM;
kdump_argv = kmalloc(KEXEC_ARGV_SIZE, GFP_KERNEL);
if (WARN_ON(!kdump_argv))
return -ENOMEM;
kexec_envp = kmalloc(KEXEC_ENVP_SIZE, GFP_KERNEL);
if (WARN_ON(!kexec_envp))
return -ENOMEM;
fw_arg1 = KEXEC_ARGV_ADDR;
memcpy(kexec_envp, (void *)fw_arg2, KEXEC_ENVP_SIZE);
_machine_kexec_prepare = loongson_kexec_prepare;
_machine_kexec_shutdown = loongson_kexec_shutdown;
_machine_crash_shutdown = loongson_crash_shutdown;
#endif
return 0;
}
arch_initcall(mips_reboot_setup);
|
