2 files changed, 69 insertions, 0 deletions

diff --git a/include/asm-ppc/kexec.h b/include/asm-ppc/kexec.h
new file mode 100644
index 000000000000..73191310d8db
--- /dev/null
+++ b/include/asm-ppc/kexec.h
@@ -0,0 +1,38 @@
+#ifndef _PPC_KEXEC_H
+#define _PPC_KEXEC_H
+
+#ifdef CONFIG_KEXEC
+
+/*
+ * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
+ * I.e. Maximum page that is mapped directly into kernel memory,
+ * and kmap is not required.
+ *
+ * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct
+ * calculation for the amount of memory directly mappable into the
+ * kernel memory space.
+ */
+
+/* Maximum physical address we can use pages from */
+#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
+/* Maximum address we can reach in physical address mode */
+#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
+/* Maximum address we can use for the control code buffer */
+#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
+
+#define KEXEC_CONTROL_CODE_SIZE 4096
+
+/* The native architecture */
+#define KEXEC_ARCH KEXEC_ARCH_PPC
+
+#ifndef __ASSEMBLY__
+
+struct kimage;
+
+extern void machine_kexec_simple(struct kimage *image);
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* CONFIG_KEXEC */
+
+#endif /* _PPC_KEXEC_H */
diff --git a/include/asm-ppc/machdep.h b/include/asm-ppc/machdep.h
index b78d40870c95..1d4ab70a56f3 100644
--- a/include/asm-ppc/machdep.h
+++ b/include/asm-ppc/machdep.h
@@ -4,6 +4,7 @@
 
 #include <linux/config.h>
 #include <linux/init.h>
+#include <linux/kexec.h>
 
 #include <asm/setup.h>
 #include <asm/page.h>
@@ -114,6 +115,36 @@ struct machdep_calls {
         /* functions for dealing with other cpus */
         struct smp_ops_t *smp_ops;
 #endif /* CONFIG_SMP */
+
+#ifdef CONFIG_KEXEC
+        /* Called to shutdown machine specific hardware not already controlled
+         * by other drivers.
+         * XXX Should we move this one out of kexec scope?
+         */
+        void (*machine_shutdown)(void);
+
+        /* Called to do the minimal shutdown needed to run a kexec'd kernel
+         * to run successfully.
+         * XXX Should we move this one out of kexec scope?
+         */
+        void (*machine_crash_shutdown)(void);
+
+        /* Called to do what every setup is needed on image and the
+         * reboot code buffer. Returns 0 on success.
+         * Provide your own (maybe dummy) implementation if your platform
+         * claims to support kexec.
+         */
+        int (*machine_kexec_prepare)(struct kimage *image);
+
+        /* Called to handle any machine specific cleanup on image */
+        void (*machine_kexec_cleanup)(struct kimage *image);
+
+        /* Called to perform the _real_ kexec.
+         * Do NOT allocate memory or fail here. We are past the point of
+         * no return.
+         */
+        void (*machine_kexec)(struct kimage *image);
+#endif /* CONFIG_KEXEC */
 };
 
 extern struct machdep_calls ppc_md;