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Elixir Cross Referencer

 * machine_kexec.c - handle transition of Linux booting another kernel

#include <linux/mm.h>
#include <linux/kexec.h>
#include <linux/delay.h>
#include <linux/reboot.h>
#include <linux/io.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
#include <asm/mach-types.h>

extern const unsigned char relocate_new_kernel[];
extern const unsigned int relocate_new_kernel_size;

extern void setup_mm_for_reboot(char mode);

extern unsigned long kexec_start_address;
extern unsigned long kexec_indirection_page;
extern unsigned long kexec_mach_type;
extern unsigned long kexec_boot_atags;

 * Provide a dummy crash_notes definition while crash dump arrives to arm.
 * This prevents breakage of crash_notes attribute in kernel/ksysfs.c.

int machine_kexec_prepare(struct kimage *image)
	return 0;

void machine_kexec_cleanup(struct kimage *image)

void machine_shutdown(void)

void machine_crash_shutdown(struct pt_regs *regs)

void machine_kexec(struct kimage *image)
	unsigned long page_list;
	unsigned long reboot_code_buffer_phys;
	void *reboot_code_buffer;

	page_list = image->head & PAGE_MASK;

	/* we need both effective and real address here */
	reboot_code_buffer_phys =
	    page_to_pfn(image->control_code_page) << PAGE_SHIFT;
	reboot_code_buffer = page_address(image->control_code_page);

	/* Prepare parameters for reboot_code_buffer*/
	kexec_start_address = image->start;
	kexec_indirection_page = page_list;
	kexec_mach_type = machine_arch_type;
	kexec_boot_atags = image->start - KEXEC_ARM_ZIMAGE_OFFSET + KEXEC_ARM_ATAGS_OFFSET;

	/* copy our kernel relocation code to the control code page */
	       relocate_new_kernel, relocate_new_kernel_size);

	flush_icache_range((unsigned long) reboot_code_buffer,
			   (unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
	printk(KERN_INFO "Bye!\n");

	setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/