2 * machine_kexec.c - handle transition of Linux booting another kernel
3 * Copyright (C) 2002-2003 Eric Biederman <ebiederm@xmission.com>
5 * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz
6 * LANDISK/sh4 supported by kogiidena
8 * This source code is licensed under the GNU General Public License,
9 * Version 2. See the file COPYING for more details.
13 #include <linux/kexec.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/numa.h>
17 #include <asm/pgtable.h>
18 #include <asm/pgalloc.h>
19 #include <asm/mmu_context.h>
21 #include <asm/cacheflush.h>
23 typedef NORET_TYPE void (*relocate_new_kernel_t)(
24 unsigned long indirection_page,
25 unsigned long reboot_code_buffer,
26 unsigned long start_address,
27 unsigned long vbr_reg) ATTRIB_NORET;
29 extern const unsigned char relocate_new_kernel[];
30 extern const unsigned int relocate_new_kernel_size;
31 extern void *gdb_vbr_vector;
33 void machine_shutdown(void)
37 void machine_crash_shutdown(struct pt_regs *regs)
42 * Do what every setup is needed on image and the
43 * reboot code buffer to allow us to avoid allocations
46 int machine_kexec_prepare(struct kimage *image)
51 void machine_kexec_cleanup(struct kimage *image)
55 static void kexec_info(struct kimage *image)
58 printk("kexec information\n");
59 for (i = 0; i < image->nr_segments; i++) {
60 printk(" segment[%d]: 0x%08x - 0x%08x (0x%08x)\n",
62 (unsigned int)image->segment[i].mem,
63 (unsigned int)image->segment[i].mem +
64 image->segment[i].memsz,
65 (unsigned int)image->segment[i].memsz);
67 printk(" start : 0x%08x\n\n", (unsigned int)image->start);
71 * Do not allocate memory (or fail in any way) in machine_kexec().
72 * We are past the point of no return, committed to rebooting now.
74 void machine_kexec(struct kimage *image)
77 unsigned long page_list;
78 unsigned long reboot_code_buffer;
79 unsigned long vbr_reg;
80 relocate_new_kernel_t rnk;
82 #if defined(CONFIG_SH_STANDARD_BIOS)
83 vbr_reg = ((unsigned long )gdb_vbr_vector) - 0x100;
85 vbr_reg = 0x80000000; // dummy
87 /* Interrupts aren't acceptable while we reboot */
90 page_list = image->head;
92 /* we need both effective and real address here */
94 (unsigned long)page_address(image->control_code_page);
96 /* copy our kernel relocation code to the control code page */
97 memcpy((void *)reboot_code_buffer, relocate_new_kernel,
98 relocate_new_kernel_size);
104 rnk = (relocate_new_kernel_t) reboot_code_buffer;
105 (*rnk)(page_list, reboot_code_buffer, image->start, vbr_reg);
108 void arch_crash_save_vmcoreinfo(void)
111 VMCOREINFO_SYMBOL(node_data);
112 VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);