/* * 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)(); }