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authorEric W. Biederman <ebiederm@xmission.com>2005-06-25 14:58:02 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 16:24:50 -0700
commit5234f5eb04abbbfa306ccfbc2ccbb6e73f515b15 (patch)
tree60f4701fdc501955ccff198f84913b96e3bbf5bf /include/asm-x86_64/kexec.h
parentd89559589a588d1a654329d8cd9a3ad33aaad9be (diff)
downloadop-kernel-dev-5234f5eb04abbbfa306ccfbc2ccbb6e73f515b15.zip
op-kernel-dev-5234f5eb04abbbfa306ccfbc2ccbb6e73f515b15.tar.gz
[PATCH] kexec: x86_64 kexec implementation
This is the x86_64 implementation of machine kexec. 32bit compatibility support has been implemented, and machine_kexec has been enhanced to not care about the changing internal kernel paget table structures. From: Alexander Nyberg <alexn@dsv.su.se> build fix Signed-off-by: Eric Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/kexec.h')
-rw-r--r--include/asm-x86_64/kexec.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/asm-x86_64/kexec.h b/include/asm-x86_64/kexec.h
new file mode 100644
index 0000000..dc33646
--- /dev/null
+++ b/include/asm-x86_64/kexec.h
@@ -0,0 +1,28 @@
+#ifndef _X86_64_KEXEC_H
+#define _X86_64_KEXEC_H
+
+#include <asm/page.h>
+#include <asm/proto.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.
+ *
+ * So far x86_64 is limited to 40 physical address bits.
+ */
+
+/* Maximum physical address we can use pages from */
+#define KEXEC_SOURCE_MEMORY_LIMIT (0xFFFFFFFFFFUL)
+/* Maximum address we can reach in physical address mode */
+#define KEXEC_DESTINATION_MEMORY_LIMIT (0xFFFFFFFFFFUL)
+/* Maximum address we can use for the control pages */
+#define KEXEC_CONTROL_MEMORY_LIMIT (0xFFFFFFFFFFUL)
+
+/* Allocate one page for the pdp and the second for the code */
+#define KEXEC_CONTROL_CODE_SIZE (4096UL + 4096UL)
+
+/* The native architecture */
+#define KEXEC_ARCH KEXEC_ARCH_X86_64
+
+#endif /* _X86_64_KEXEC_H */
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