Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002 | |
3 | * | |
4 | */ | |
5 | ||
6 | #ifndef _ASM_MMZONE_H_ | |
7 | #define _ASM_MMZONE_H_ | |
8 | ||
9 | #include <asm/smp.h> | |
10 | ||
11 | #ifdef CONFIG_DISCONTIGMEM | |
12 | ||
13 | extern struct pglist_data *node_data[]; | |
14 | #define NODE_DATA(nid) (node_data[nid]) | |
15 | ||
16 | #define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn) | |
1da177e4 LT |
17 | #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) |
18 | #define node_end_pfn(nid) \ | |
19 | ({ \ | |
20 | pg_data_t *__pgdat = NODE_DATA(nid); \ | |
21 | __pgdat->node_start_pfn + __pgdat->node_spanned_pages - 1; \ | |
22 | }) | |
23 | ||
1da177e4 LT |
24 | #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) |
25 | /* | |
26 | * pfn_valid should be made as fast as possible, and the current definition | |
27 | * is valid for machines that are NUMA, but still contiguous, which is what | |
28 | * is currently supported. A more generalised, but slower definition would | |
29 | * be something like this - mbligh: | |
30 | * ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) ) | |
31 | */ | |
32 | #if 1 /* M32R_FIXME */ | |
33 | #define pfn_valid(pfn) (1) | |
34 | #else | |
35 | #define pfn_valid(pfn) ((pfn) < num_physpages) | |
36 | #endif | |
37 | ||
38 | /* | |
39 | * generic node memory support, the following assumptions apply: | |
40 | */ | |
41 | ||
42 | static __inline__ int pfn_to_nid(unsigned long pfn) | |
43 | { | |
44 | int node; | |
45 | ||
46 | for (node = 0 ; node < MAX_NUMNODES ; node++) | |
47 | if (pfn >= node_start_pfn(node) && pfn <= node_end_pfn(node)) | |
48 | break; | |
49 | ||
50 | return node; | |
51 | } | |
52 | ||
53 | static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn) | |
54 | { | |
55 | return(NODE_DATA(pfn_to_nid(pfn))); | |
56 | } | |
57 | ||
58 | #endif /* CONFIG_DISCONTIGMEM */ | |
59 | #endif /* _ASM_MMZONE_H_ */ |