diff options
| author | Andy Whitcroft <apw@shadowen.org> | 2007-10-16 01:24:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:51 -0700 |
| commit | d29eff7bca60c9ee401d691d4562a4abca8de543 (patch) | |
| tree | 86715dfec0470a59d3bbad032b3032321f101766 /include/asm-powerpc | |
| parent | 46644c2477c58906e95281636d04e9cc42b39352 (diff) | |
ppc64: SPARSEMEM_VMEMMAP support
Enable virtual memmap support for SPARSEMEM on PPC64 systems. Slice a 16th
off the end of the linear mapping space and use that to hold the vmemmap.
Uses the same size mapping as uses in the linear 1:1 kernel mapping.
[pbadari@gmail.com: fix warning]
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/pgtable-ppc64.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h index 300f9a199bf..dd4c26dc57d 100644 --- a/include/asm-powerpc/pgtable-ppc64.h +++ b/include/asm-powerpc/pgtable-ppc64.h @@ -68,6 +68,14 @@ #define USER_REGION_ID (0UL) /* + * Defines the address of the vmemap area, in the top 16th of the + * kernel region. + */ +#define VMEMMAP_BASE (ASM_CONST(CONFIG_KERNEL_START) + \ + (0xfUL << (REGION_SHIFT - 4))) +#define vmemmap ((struct page *)VMEMMAP_BASE) + +/* * Common bits in a linux-style PTE. These match the bits in the * (hardware-defined) PowerPC PTE as closely as possible. Additional * bits may be defined in pgtable-*.h |