2 * Code to handle transition of Linux booting another kernel.
4 * Copyright (C) 2002-2003 Eric Biederman <ebiederm@xmission.com>
5 * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz
6 * Copyright (C) 2005 IBM Corporation.
8 * This source code is licensed under the GNU General Public License,
9 * Version 2. See the file COPYING for more details.
12 #include <linux/kexec.h>
13 #include <linux/reboot.h>
14 #include <linux/threads.h>
15 #include <asm/machdep.h>
18 * Provide a dummy crash_notes definition until crash dump is implemented.
19 * This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
21 note_buf_t crash_notes[NR_CPUS];
23 void machine_crash_shutdown(struct pt_regs *regs)
25 if (ppc_md.machine_crash_shutdown)
26 ppc_md.machine_crash_shutdown(regs);
30 * Do what every setup is needed on image and the
31 * reboot code buffer to allow us to avoid allocations
34 int machine_kexec_prepare(struct kimage *image)
36 if (ppc_md.machine_kexec_prepare)
37 return ppc_md.machine_kexec_prepare(image);
39 * Fail if platform doesn't provide its own machine_kexec_prepare
45 void machine_kexec_cleanup(struct kimage *image)
47 if (ppc_md.machine_kexec_cleanup)
48 ppc_md.machine_kexec_cleanup(image);
52 * Do not allocate memory (or fail in any way) in machine_kexec().
53 * We are past the point of no return, committed to rebooting now.
55 NORET_TYPE void machine_kexec(struct kimage *image)
57 if (ppc_md.machine_kexec)
58 ppc_md.machine_kexec(image);
61 * Fall back to normal restart if platform doesn't provide
62 * its own kexec function, and user insist to kexec...
64 machine_restart(NULL);