Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * PPC32 code to handle Linux booting another kernel.

 *

 * Copyright (C) 2002-2003 Eric Biederman  <ebiederm@xmission.com>

 * 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 NORET_TYPE void (*relocate_new_kernel_t)(

                                unsigned long indirection_page,

                                unsigned long reboot_code_buffer,

                                unsigned long start_address) ATTRIB_NORET;

/*

 * 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 */

        local_irq_disable();

        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,

                                                relocate_new_kernel_size);

        flush_icache_range(reboot_code_buffer,

                                reboot_code_buffer + KEXEC_CONTROL_CODE_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;

}