[PATCH] sh: kexec() support

This adds kexec() support for SH.

Signed-off-by: kogiidena <kogiidena@eggplant.ddo.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Cc: <fastboot@lists.osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 34 insertions, 0 deletions

diff --git a/include/asm-sh/kexec.h b/include/asm-sh/kexec.h
new file mode 100644
index 000000000000..9dfe59f6fcb5
--- /dev/null
+++ b/include/asm-sh/kexec.h
@@ -0,0 +1,33 @@
+#ifndef _SH_KEXEC_H
+#define _SH_KEXEC_H
+
+/*
+ * 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_SH
+
+#ifndef __ASSEMBLY__
+
+extern void machine_shutdown(void);
+extern void *crash_notes;
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _SH_KEXEC_H */
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 94abc07cb164..a311f58c8a7c 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -119,6 +119,7 @@ extern struct kimage *kexec_image;
 #define KEXEC_ARCH_PPC64   (21 << 16)
 #define KEXEC_ARCH_IA_64   (50 << 16)
 #define KEXEC_ARCH_S390    (22 << 16)
+#define KEXEC_ARCH_SH      (42 << 16)
 
 #define KEXEC_FLAGS    (KEXEC_ON_CRASH)  /* List of defined/legal kexec flags */