This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / kernel / machine_kexec.c

diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
new file mode 100644 (file)
index 0000000..a81ca1b
--- /dev/null
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -0,0 +1,61 @@
+/*
+ * Code to handle transition of 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/reboot.h>
+#include <linux/threads.h>
+#include <asm/machdep.h>
+
+void machine_crash_shutdown(struct pt_regs *regs)
+{
+       if (ppc_md.machine_crash_shutdown)
+               ppc_md.machine_crash_shutdown(regs);
+}
+
+/*
+ * Do what every setup is needed on image and the
+ * reboot code buffer to allow us to avoid allocations
+ * later.
+ */
+int machine_kexec_prepare(struct kimage *image)
+{
+       if (ppc_md.machine_kexec_prepare)
+               return ppc_md.machine_kexec_prepare(image);
+       /*
+        * Fail if platform doesn't provide its own machine_kexec_prepare
+        * implementation.
+        */
+       return -ENOSYS;
+}
+
+void machine_kexec_cleanup(struct kimage *image)
+{
+       if (ppc_md.machine_kexec_cleanup)
+               ppc_md.machine_kexec_cleanup(image);
+}
+
+/*
+ * Do not allocate memory (or fail in any way) in machine_kexec().
+ * We are past the point of no return, committed to rebooting now.
+ */
+NORET_TYPE void machine_kexec(struct kimage *image)
+{
+       if (ppc_md.machine_kexec)
+               ppc_md.machine_kexec(image);
+       else {
+               /*
+                * Fall back to normal restart if platform doesn't provide
+                * its own kexec function, and user insist to kexec...
+                */
+               machine_restart(NULL);
+       }
+       for(;;);
+}