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| author | Andy Whitcroft <apw@shadowen.org> | 2005-06-23 00:07:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-23 09:45:05 -0700 |
| commit | 05b79bdcb48c18cd9b580c39e3efb9a1ab078151 (patch) | |
| tree | 1767aaa7a4621ff4cf1a85c2078229de54272f30 /include/asm-i386/sparsemem.h | |
| parent | d41dee369bff3b9dcb6328d4d822926c28cc2594 (diff) | |
| download | linux-05b79bdcb48c18cd9b580c39e3efb9a1ab078151.tar.gz linux-05b79bdcb48c18cd9b580c39e3efb9a1ab078151.tar.bz2 linux-05b79bdcb48c18cd9b580c39e3efb9a1ab078151.zip | |
[PATCH] sparsemem memory model for i386
Provide the architecture specific implementation for SPARSEMEM for i386 SMP
and NUMA systems.
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Martin Bligh <mbligh@aracnet.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386/sparsemem.h')
| -rw-r--r-- | include/asm-i386/sparsemem.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-i386/sparsemem.h b/include/asm-i386/sparsemem.h new file mode 100644 index 000000000000..cfeed990585f --- /dev/null +++ b/include/asm-i386/sparsemem.h @@ -0,0 +1,31 @@ +#ifndef _I386_SPARSEMEM_H +#define _I386_SPARSEMEM_H +#ifdef CONFIG_SPARSEMEM + +/* + * generic non-linear memory support: + * + * 1) we will not split memory into more chunks than will fit into the + * flags field of the struct page + */ + +/* + * SECTION_SIZE_BITS 2^N: how big each section will be + * MAX_PHYSADDR_BITS 2^N: how much physical address space we have + * MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space + */ +#ifdef CONFIG_X86_PAE +#define SECTION_SIZE_BITS 30 +#define MAX_PHYSADDR_BITS 36 +#define MAX_PHYSMEM_BITS 36 +#else +#define SECTION_SIZE_BITS 26 +#define MAX_PHYSADDR_BITS 32 +#define MAX_PHYSMEM_BITS 32 +#endif + +/* XXX: FIXME -- wli */ +#define kern_addr_valid(kaddr) (0) + +#endif /* CONFIG_SPARSEMEM */ +#endif /* _I386_SPARSEMEM_H */ |