blob: affe5dcce7f465bcfcae706e3c3a1ebb24b44dbe [file] [log] [blame]
* PPC32 code to handle Linux booting another kernel.
* Copyright (C) 2002-2003 Eric Biederman <>
* GameCube/ppc32 port Copyright (C) 2004 Albert Herranz
* Copyright (C) 2005 IBM Corporation.
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
#include <linux/kexec.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <asm/cacheflush.h>
#include <asm/hw_irq.h>
#include <asm/io.h>
typedef void (*relocate_new_kernel_t)(
unsigned long indirection_page,
unsigned long reboot_code_buffer,
unsigned long start_address) __noreturn;
* This is a generic machine_kexec function suitable at least for
* non-OpenFirmware embedded platforms.
* It merely copies the image relocation code to the control page and
* jumps to it.
* A platform specific function may just call this one.
void default_machine_kexec(struct kimage *image)
extern const unsigned char relocate_new_kernel[];
extern const unsigned int relocate_new_kernel_size;
unsigned long page_list;
unsigned long reboot_code_buffer, reboot_code_buffer_phys;
relocate_new_kernel_t rnk;
/* Interrupts aren't acceptable while we reboot */
/* mask each interrupt so we are in a more sane state for the
* kexec kernel */
page_list = image->head;
/* we need both effective and real address here */
reboot_code_buffer =
(unsigned long)page_address(image->control_code_page);
reboot_code_buffer_phys = virt_to_phys((void *)reboot_code_buffer);
/* copy our kernel relocation code to the control code page */
memcpy((void *)reboot_code_buffer, relocate_new_kernel,
reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
printk(KERN_INFO "Bye!\n");
/* now call it */
rnk = (relocate_new_kernel_t) reboot_code_buffer;
(*rnk)(page_list, reboot_code_buffer_phys, image->start);
int default_machine_kexec_prepare(struct kimage *image)
return 0;