projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002 | |
| 3 | * | |
| 4 | */ | |
| 5 | ||
| 1965aae3 PA |
6 | #ifndef _ASM_X86_MMZONE_32_H |
| 7 | #define _ASM_X86_MMZONE_32_H | |
| 1da177e4 LT |
8 | |
| 9 | #include <asm/smp.h> | |
| 10 | ||
| 8ff8b27b | 11 | #ifdef CONFIG_NUMA |
| 05b79bdc AW |
12 | extern struct pglist_data *node_data[]; |
| 13 | #define NODE_DATA(nid) (node_data[nid]) | |
| 05b79bdc AW |
14 | #endif /* CONFIG_NUMA */ |
| 15 | ||
| 16 | #ifdef CONFIG_DISCONTIGMEM | |
| 1da177e4 LT |
17 | |
| 18 | /* | |
| 19 | * generic node memory support, the following assumptions apply: | |
| 20 | * | |
| af901ca1 | 21 | * 1) memory comes in 64Mb contiguous chunks which are either present or not |
| 1da177e4 LT |
22 | * 2) we will not have more than 64Gb in total |
| 23 | * | |
| 24 | * for now assume that 64Gb is max amount of RAM for whole system | |
| 25 | * 64Gb / 4096bytes/page = 16777216 pages | |
| 26 | */ | |
| 27 | #define MAX_NR_PAGES 16777216 | |
| d0ead157 TH |
28 | #define MAX_SECTIONS 1024 |
| 29 | #define PAGES_PER_SECTION (MAX_NR_PAGES/MAX_SECTIONS) | |
| 1da177e4 LT |
30 | |
| 31 | extern s8 physnode_map[]; | |
| 32 | ||
| 33 | static inline int pfn_to_nid(unsigned long pfn) | |
| 34 | { | |
| 35 | #ifdef CONFIG_NUMA | |
| d0ead157 | 36 | return((int) physnode_map[(pfn) / PAGES_PER_SECTION]); |
| 1da177e4 LT |
37 | #else |
| 38 | return 0; | |
| 39 | #endif | |
| 40 | } | |
| 41 | ||
| 1da177e4 LT |
42 | static inline int pfn_valid(int pfn) |
| 43 | { | |
| 44 | int nid = pfn_to_nid(pfn); | |
| 45 | ||
| 46 | if (nid >= 0) | |
| 47 | return (pfn < node_end_pfn(nid)); | |
| 48 | return 0; | |
| 49 | } | |
| 05b79bdc | 50 | |
| a26474e8 TH |
51 | #define early_pfn_valid(pfn) pfn_valid((pfn)) |
| 52 | ||
| 05b79bdc AW |
53 | #endif /* CONFIG_DISCONTIGMEM */ |
| 54 | ||
| 1965aae3 | 55 | #endif /* _ASM_X86_MMZONE_32_H */ |