86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
|
|
* machine_kexec.c for kexec
|
|
* Created by <nschichan@corp.free.fr> on Thu Oct 12 15:15:06 2006
|
|
*
|
|
* 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/delay.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/page.h>
|
|
|
|
extern const unsigned char relocate_new_kernel[];
|
|
extern const unsigned int relocate_new_kernel_size;
|
|
|
|
extern unsigned long kexec_start_address;
|
|
extern unsigned long kexec_indirection_page;
|
|
|
|
int
|
|
machine_kexec_prepare(struct kimage *kimage)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
machine_kexec_cleanup(struct kimage *kimage)
|
|
{
|
|
}
|
|
|
|
void
|
|
machine_shutdown(void)
|
|
{
|
|
}
|
|
|
|
void
|
|
machine_crash_shutdown(struct pt_regs *regs)
|
|
{
|
|
}
|
|
|
|
void
|
|
machine_kexec(struct kimage *image)
|
|
{
|
|
unsigned long reboot_code_buffer;
|
|
unsigned long entry;
|
|
unsigned long *ptr;
|
|
|
|
reboot_code_buffer =
|
|
(unsigned long)page_address(image->control_code_page);
|
|
|
|
kexec_start_address = image->start;
|
|
kexec_indirection_page = phys_to_virt(image->head & PAGE_MASK);
|
|
|
|
memcpy((void*)reboot_code_buffer, relocate_new_kernel,
|
|
relocate_new_kernel_size);
|
|
|
|
/*
|
|
* The generic kexec code builds a page list with physical
|
|
* addresses. they are directly accessible through KSEG0 (or
|
|
* CKSEG0 or XPHYS if on 64bit system), hence the
|
|
* pys_to_virt() call.
|
|
*/
|
|
for (ptr = &image->head; (entry = *ptr) && !(entry &IND_DONE);
|
|
ptr = (entry & IND_INDIRECTION) ?
|
|
phys_to_virt(entry & PAGE_MASK) : ptr + 1) {
|
|
if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION ||
|
|
*ptr & IND_DESTINATION)
|
|
*ptr = phys_to_virt(*ptr);
|
|
}
|
|
|
|
/*
|
|
* we do not want to be bothered.
|
|
*/
|
|
local_irq_disable();
|
|
|
|
flush_icache_range(reboot_code_buffer,
|
|
reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
|
|
|
|
printk("Will call new kernel at %08x\n", image->start);
|
|
printk("Bye ...\n");
|
|
flush_cache_all();
|
|
((void (*)(void))reboot_code_buffer)();
|
|
}
|