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[SPARC64]: Move over to sparsemem.

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This has been pending for a long time, and the fact
that we waste a ton of ram on some configurations
kind of pushed things over the edge.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-03-08 02:16:07 -08:00
parent ee29074d3b
commit d1112018b4
7 changed files with 123 additions and 54 deletions
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9
include/asm-sparc64/page.h
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@@ -125,17 +125,10 @@ typedef unsigned long pgprot_t;
#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
/* PFNs are real physical page numbers. However, mem_map only begins to record
* per-page information starting at pfn_base. This is to handle systems where
* the first physical page in the machine is at some huge physical address,
* such as 4GB. This is common on a partitioned E10000, for example.
*/
extern struct page *pfn_to_page(unsigned long pfn);
extern unsigned long page_to_pfn(struct page *);
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
#define pfn_valid(pfn) (((pfn)-(pfn_base)) < max_mapnr)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define virt_to_phys __pa