diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2005-06-25 14:58:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-25 16:24:50 -0700 |
| commit | 5234f5eb04abbbfa306ccfbc2ccbb6e73f515b15 (patch) | |
| tree | 60f4701fdc501955ccff198f84913b96e3bbf5bf /include/asm-x86_64/kexec.h | |
| parent | d89559589a588d1a654329d8cd9a3ad33aaad9be (diff) | |
| download | lwn-5234f5eb04abbbfa306ccfbc2ccbb6e73f515b15.tar.gz lwn-5234f5eb04abbbfa306ccfbc2ccbb6e73f515b15.zip | |
[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.h | 28 |
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 000000000000..dc33646dc7dd --- /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 */ |