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9#include <linux/mm.h>
10#include <linux/kexec.h>
11#include <linux/delay.h>
12#include <linux/reboot.h>
13#include <linux/numa.h>
14#include <linux/ftrace.h>
15#include <linux/suspend.h>
16#include <linux/memblock.h>
17#include <asm/mmu_context.h>
18#include <asm/io.h>
19#include <asm/cacheflush.h>
20#include <asm/sh_bios.h>
21#include <asm/reboot.h>
22
23typedef void (*relocate_new_kernel_t)(unsigned long indirection_page,
24 unsigned long reboot_code_buffer,
25 unsigned long start_address);
26
27extern const unsigned char relocate_new_kernel[];
28extern const unsigned int relocate_new_kernel_size;
29extern void *vbr_base;
30
31void native_machine_crash_shutdown(struct pt_regs *regs)
32{
33
34}
35
36
37
38
39
40
41int machine_kexec_prepare(struct kimage *image)
42{
43 return 0;
44}
45
46void machine_kexec_cleanup(struct kimage *image)
47{
48}
49
50static void kexec_info(struct kimage *image)
51{
52 int i;
53 printk("kexec information\n");
54 for (i = 0; i < image->nr_segments; i++) {
55 printk(" segment[%d]: 0x%08x - 0x%08x (0x%08x)\n",
56 i,
57 (unsigned int)image->segment[i].mem,
58 (unsigned int)image->segment[i].mem +
59 image->segment[i].memsz,
60 (unsigned int)image->segment[i].memsz);
61 }
62 printk(" start : 0x%08x\n\n", (unsigned int)image->start);
63}
64
65
66
67
68
69void machine_kexec(struct kimage *image)
70{
71 unsigned long page_list;
72 unsigned long reboot_code_buffer;
73 relocate_new_kernel_t rnk;
74 unsigned long entry;
75 unsigned long *ptr;
76 int save_ftrace_enabled;
77
78
79
80
81
82
83 for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE);
84 ptr = (entry & IND_INDIRECTION) ?
85 phys_to_virt(entry & PAGE_MASK) : ptr + 1) {
86 if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION ||
87 *ptr & IND_DESTINATION)
88 *ptr = (unsigned long) phys_to_virt(*ptr);
89 }
90
91#ifdef CONFIG_KEXEC_JUMP
92 if (image->preserve_context)
93 save_processor_state();
94#endif
95
96 save_ftrace_enabled = __ftrace_enabled_save();
97
98
99 local_irq_disable();
100
101 page_list = image->head;
102
103
104 reboot_code_buffer =
105 (unsigned long)page_address(image->control_code_page);
106
107
108 memcpy((void *)reboot_code_buffer, relocate_new_kernel,
109 relocate_new_kernel_size);
110
111 kexec_info(image);
112 flush_cache_all();
113
114 sh_bios_vbr_reload();
115
116
117 rnk = (relocate_new_kernel_t) reboot_code_buffer;
118 (*rnk)(page_list, reboot_code_buffer,
119 (unsigned long)phys_to_virt(image->start));
120
121#ifdef CONFIG_KEXEC_JUMP
122 asm volatile("ldc %0, vbr" : : "r" (&vbr_base) : "memory");
123
124 if (image->preserve_context)
125 restore_processor_state();
126
127
128 for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE);
129 ptr = (*ptr & IND_INDIRECTION) ?
130 phys_to_virt(*ptr & PAGE_MASK) : ptr + 1) {
131 if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION ||
132 *ptr & IND_DESTINATION)
133 *ptr = virt_to_phys(*ptr);
134 }
135#endif
136
137 __ftrace_enabled_restore(save_ftrace_enabled);
138}
139
140void arch_crash_save_vmcoreinfo(void)
141{
142#ifdef CONFIG_NUMA
143 VMCOREINFO_SYMBOL(node_data);
144 VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
145#endif
146#ifdef CONFIG_X2TLB
147 VMCOREINFO_CONFIG(X2TLB);
148#endif
149}
150
151void __init reserve_crashkernel(void)
152{
153 unsigned long long crash_size, crash_base;
154 int ret;
155
156 ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
157 &crash_size, &crash_base);
158 if (ret == 0 && crash_size > 0) {
159 crashk_res.start = crash_base;
160 crashk_res.end = crash_base + crash_size - 1;
161 }
162
163 if (crashk_res.end == crashk_res.start)
164 goto disable;
165
166 crash_size = PAGE_ALIGN(resource_size(&crashk_res));
167 if (!crashk_res.start) {
168 unsigned long max = memblock_end_of_DRAM() - memory_limit;
169 crashk_res.start = memblock_phys_alloc_range(crash_size,
170 PAGE_SIZE, 0, max);
171 if (!crashk_res.start) {
172 pr_err("crashkernel allocation failed\n");
173 goto disable;
174 }
175 } else {
176 ret = memblock_reserve(crashk_res.start, crash_size);
177 if (unlikely(ret < 0)) {
178 pr_err("crashkernel reservation failed - "
179 "memory is in use\n");
180 goto disable;
181 }
182 }
183
184 crashk_res.end = crashk_res.start + crash_size - 1;
185
186
187
188
189 if ((memblock_end_of_DRAM() - memory_limit) <= crashk_res.end) {
190 memory_limit = 0;
191 pr_info("Disabled memory limit for crashkernel\n");
192 }
193
194 pr_info("Reserving %ldMB of memory at 0x%08lx "
195 "for crashkernel (System RAM: %ldMB)\n",
196 (unsigned long)(crash_size >> 20),
197 (unsigned long)(crashk_res.start),
198 (unsigned long)(memblock_phys_mem_size() >> 20));
199
200 return;
201
202disable:
203 crashk_res.start = crashk_res.end = 0;
204}
205