Commit | Line | Data |
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9d44190e | 1 | /* |
2 | * machine_kexec.c - handle transition of Linux booting another kernel | |
3 | * Copyright (C) 2002-2003 Eric Biederman <ebiederm@xmission.com> | |
4 | * | |
5 | * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz | |
6 | * LANDISK/sh4 supported by kogiidena | |
7 | * | |
8 | * This source code is licensed under the GNU General Public License, | |
9 | * Version 2. See the file COPYING for more details. | |
10 | */ | |
9d44190e | 11 | #include <linux/mm.h> |
12 | #include <linux/kexec.h> | |
13 | #include <linux/delay.h> | |
14 | #include <linux/reboot.h> | |
c3b4adfa | 15 | #include <linux/numa.h> |
7e6b6f2b | 16 | #include <linux/ftrace.h> |
b7cf6ddc | 17 | #include <linux/suspend.h> |
95f72d1e | 18 | #include <linux/memblock.h> |
9d44190e | 19 | #include <asm/pgtable.h> |
20 | #include <asm/pgalloc.h> | |
21 | #include <asm/mmu_context.h> | |
22 | #include <asm/io.h> | |
23 | #include <asm/cacheflush.h> | |
191d0d24 | 24 | #include <asm/sh_bios.h> |
fbb82b03 | 25 | #include <asm/reboot.h> |
9d44190e | 26 | |
b7cf6ddc MD |
27 | typedef void (*relocate_new_kernel_t)(unsigned long indirection_page, |
28 | unsigned long reboot_code_buffer, | |
29 | unsigned long start_address); | |
9d44190e | 30 | |
2efe55a9 TK |
31 | extern const unsigned char relocate_new_kernel[]; |
32 | extern const unsigned int relocate_new_kernel_size; | |
b7cf6ddc | 33 | extern void *vbr_base; |
9d44190e | 34 | |
fbb82b03 | 35 | void native_machine_crash_shutdown(struct pt_regs *regs) |
9d44190e | 36 | { |
fbb82b03 | 37 | /* Nothing to do for UP, but definitely broken for SMP.. */ |
9d44190e | 38 | } |
39 | ||
40 | /* | |
41 | * Do what every setup is needed on image and the | |
42 | * reboot code buffer to allow us to avoid allocations | |
43 | * later. | |
44 | */ | |
45 | int machine_kexec_prepare(struct kimage *image) | |
46 | { | |
47 | return 0; | |
48 | } | |
49 | ||
50 | void machine_kexec_cleanup(struct kimage *image) | |
51 | { | |
52 | } | |
53 | ||
54 | static void kexec_info(struct kimage *image) | |
55 | { | |
56 | int i; | |
57 | printk("kexec information\n"); | |
58 | for (i = 0; i < image->nr_segments; i++) { | |
59 | printk(" segment[%d]: 0x%08x - 0x%08x (0x%08x)\n", | |
60 | i, | |
61 | (unsigned int)image->segment[i].mem, | |
4d5ade5b PM |
62 | (unsigned int)image->segment[i].mem + |
63 | image->segment[i].memsz, | |
9d44190e | 64 | (unsigned int)image->segment[i].memsz); |
4d5ade5b | 65 | } |
9d44190e | 66 | printk(" start : 0x%08x\n\n", (unsigned int)image->start); |
67 | } | |
68 | ||
9d44190e | 69 | /* |
70 | * Do not allocate memory (or fail in any way) in machine_kexec(). | |
71 | * We are past the point of no return, committed to rebooting now. | |
72 | */ | |
3ab83521 | 73 | void machine_kexec(struct kimage *image) |
9d44190e | 74 | { |
9d44190e | 75 | unsigned long page_list; |
76 | unsigned long reboot_code_buffer; | |
9d44190e | 77 | relocate_new_kernel_t rnk; |
e4e063d0 MD |
78 | unsigned long entry; |
79 | unsigned long *ptr; | |
7e6b6f2b | 80 | int save_ftrace_enabled; |
e4e063d0 MD |
81 | |
82 | /* | |
83 | * Nicked from the mips version of machine_kexec(): | |
84 | * The generic kexec code builds a page list with physical | |
85 | * addresses. Use phys_to_virt() to convert them to virtual. | |
86 | */ | |
87 | for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); | |
88 | ptr = (entry & IND_INDIRECTION) ? | |
89 | phys_to_virt(entry & PAGE_MASK) : ptr + 1) { | |
90 | if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION || | |
91 | *ptr & IND_DESTINATION) | |
92 | *ptr = (unsigned long) phys_to_virt(*ptr); | |
93 | } | |
9d44190e | 94 | |
b7cf6ddc MD |
95 | #ifdef CONFIG_KEXEC_JUMP |
96 | if (image->preserve_context) | |
97 | save_processor_state(); | |
98 | #endif | |
99 | ||
7e6b6f2b PM |
100 | save_ftrace_enabled = __ftrace_enabled_save(); |
101 | ||
9d44190e | 102 | /* Interrupts aren't acceptable while we reboot */ |
103 | local_irq_disable(); | |
104 | ||
105 | page_list = image->head; | |
106 | ||
107 | /* we need both effective and real address here */ | |
108 | reboot_code_buffer = | |
109 | (unsigned long)page_address(image->control_code_page); | |
110 | ||
111 | /* copy our kernel relocation code to the control code page */ | |
112 | memcpy((void *)reboot_code_buffer, relocate_new_kernel, | |
113 | relocate_new_kernel_size); | |
114 | ||
a6bab7b5 | 115 | kexec_info(image); |
9d44190e | 116 | flush_cache_all(); |
117 | ||
191d0d24 | 118 | sh_bios_vbr_reload(); |
a6bab7b5 | 119 | |
9d44190e | 120 | /* now call it */ |
121 | rnk = (relocate_new_kernel_t) reboot_code_buffer; | |
615e73b3 MD |
122 | (*rnk)(page_list, reboot_code_buffer, |
123 | (unsigned long)phys_to_virt(image->start)); | |
b7cf6ddc MD |
124 | |
125 | #ifdef CONFIG_KEXEC_JUMP | |
126 | asm volatile("ldc %0, vbr" : : "r" (&vbr_base) : "memory"); | |
a6bab7b5 | 127 | |
b7cf6ddc MD |
128 | if (image->preserve_context) |
129 | restore_processor_state(); | |
130 | ||
131 | /* Convert page list back to physical addresses, what a mess. */ | |
132 | for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); | |
133 | ptr = (*ptr & IND_INDIRECTION) ? | |
134 | phys_to_virt(*ptr & PAGE_MASK) : ptr + 1) { | |
135 | if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION || | |
136 | *ptr & IND_DESTINATION) | |
137 | *ptr = virt_to_phys(*ptr); | |
138 | } | |
139 | #endif | |
7e6b6f2b PM |
140 | |
141 | __ftrace_enabled_restore(save_ftrace_enabled); | |
9d44190e | 142 | } |
143 | ||
c3b4adfa PM |
144 | void arch_crash_save_vmcoreinfo(void) |
145 | { | |
146 | #ifdef CONFIG_NUMA | |
147 | VMCOREINFO_SYMBOL(node_data); | |
148 | VMCOREINFO_LENGTH(node_data, MAX_NUMNODES); | |
149 | #endif | |
aa424bbb PM |
150 | #ifdef CONFIG_X2TLB |
151 | VMCOREINFO_CONFIG(X2TLB); | |
152 | #endif | |
c3b4adfa | 153 | } |
a5ec3950 PM |
154 | |
155 | void __init reserve_crashkernel(void) | |
156 | { | |
157 | unsigned long long crash_size, crash_base; | |
158 | int ret; | |
159 | ||
95f72d1e | 160 | ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(), |
a5ec3950 PM |
161 | &crash_size, &crash_base); |
162 | if (ret == 0 && crash_size > 0) { | |
163 | crashk_res.start = crash_base; | |
164 | crashk_res.end = crash_base + crash_size - 1; | |
165 | } | |
166 | ||
167 | if (crashk_res.end == crashk_res.start) | |
168 | goto disable; | |
169 | ||
28f65c11 | 170 | crash_size = PAGE_ALIGN(resource_size(&crashk_res)); |
a5ec3950 | 171 | if (!crashk_res.start) { |
95f72d1e YL |
172 | unsigned long max = memblock_end_of_DRAM() - memory_limit; |
173 | crashk_res.start = __memblock_alloc_base(crash_size, PAGE_SIZE, max); | |
a5ec3950 PM |
174 | if (!crashk_res.start) { |
175 | pr_err("crashkernel allocation failed\n"); | |
176 | goto disable; | |
177 | } | |
178 | } else { | |
95f72d1e | 179 | ret = memblock_reserve(crashk_res.start, crash_size); |
a5ec3950 PM |
180 | if (unlikely(ret < 0)) { |
181 | pr_err("crashkernel reservation failed - " | |
182 | "memory is in use\n"); | |
183 | goto disable; | |
184 | } | |
185 | } | |
186 | ||
5e2ff328 PM |
187 | crashk_res.end = crashk_res.start + crash_size - 1; |
188 | ||
189 | /* | |
190 | * Crash kernel trumps memory limit | |
191 | */ | |
95f72d1e | 192 | if ((memblock_end_of_DRAM() - memory_limit) <= crashk_res.end) { |
5e2ff328 PM |
193 | memory_limit = 0; |
194 | pr_info("Disabled memory limit for crashkernel\n"); | |
195 | } | |
196 | ||
197 | pr_info("Reserving %ldMB of memory at 0x%08lx " | |
a5ec3950 PM |
198 | "for crashkernel (System RAM: %ldMB)\n", |
199 | (unsigned long)(crash_size >> 20), | |
5e2ff328 | 200 | (unsigned long)(crashk_res.start), |
95f72d1e | 201 | (unsigned long)(memblock_phys_mem_size() >> 20)); |
a5ec3950 | 202 | |
a5ec3950 PM |
203 | return; |
204 | ||
205 | disable: | |
206 | crashk_res.start = crashk_res.end = 0; | |
207 | } |