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1da177e4 LT |
1 | #ifndef _PARISC_MMZONE_H |
2 | #define _PARISC_MMZONE_H | |
3 | ||
4 | #ifdef CONFIG_DISCONTIGMEM | |
5 | ||
6 | #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */ | |
7 | extern int npmem_ranges; | |
8 | ||
9 | struct node_map_data { | |
10 | pg_data_t pg_data; | |
11 | }; | |
12 | ||
13 | extern struct node_map_data node_data[]; | |
14 | ||
15 | #define NODE_DATA(nid) (&node_data[nid].pg_data) | |
16 | ||
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; \ | |
22 | }) | |
1da177e4 LT |
23 | |
24 | /* We have these possible memory map layouts: | |
25 | * Astro: 0-3.75, 67.75-68, 4-64 | |
26 | * zx1: 0-1, 257-260, 4-256 | |
27 | * Stretch (N-class): 0-2, 4-32, 34-xxx | |
28 | */ | |
29 | ||
30 | /* Since each 1GB can only belong to one region (node), we can create | |
31 | * an index table for pfn to nid lookup; each entry in pfnnid_map | |
32 | * represents 1GB, and contains the node that the memory belongs to. */ | |
33 | ||
34 | #define PFNNID_SHIFT (30 - PAGE_SHIFT) | |
35 | #define PFNNID_MAP_MAX 512 /* support 512GB */ | |
36 | extern unsigned char pfnnid_map[PFNNID_MAP_MAX]; | |
37 | ||
38 | #ifndef __LP64__ | |
39 | #define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT)) | |
40 | #else | |
41 | /* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */ | |
42 | #define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT)) | |
43 | #endif | |
44 | ||
45 | static inline int pfn_to_nid(unsigned long pfn) | |
46 | { | |
47 | unsigned int i; | |
48 | unsigned char r; | |
49 | ||
50 | if (unlikely(pfn_is_io(pfn))) | |
51 | return 0; | |
52 | ||
53 | i = pfn >> PFNNID_SHIFT; | |
54 | BUG_ON(i >= sizeof(pfnnid_map) / sizeof(pfnnid_map[0])); | |
55 | r = pfnnid_map[i]; | |
56 | BUG_ON(r == 0xff); | |
57 | ||
58 | return (int)r; | |
59 | } | |
60 | ||
61 | static inline int pfn_valid(int pfn) | |
62 | { | |
63 | int nid = pfn_to_nid(pfn); | |
64 | ||
65 | if (nid >= 0) | |
66 | return (pfn < node_end_pfn(nid)); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | #else /* !CONFIG_DISCONTIGMEM */ | |
71 | #define MAX_PHYSMEM_RANGES 1 | |
72 | #endif | |
73 | #endif /* _PARISC_MMZONE_H */ |