projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _PARISC_MMZONE_H |
| 2 | #define _PARISC_MMZONE_H | |
| 3 | ||
| 872420b3 JDA |
4 | #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */ |
| 5 | ||
| 1da177e4 LT |
6 | #ifdef CONFIG_DISCONTIGMEM |
| 7 | ||
| 1da177e4 LT |
8 | extern int npmem_ranges; |
| 9 | ||
| 10 | struct node_map_data { | |
| 11 | pg_data_t pg_data; | |
| 12 | }; | |
| 13 | ||
| 14 | extern struct node_map_data node_data[]; | |
| 15 | ||
| 16 | #define NODE_DATA(nid) (&node_data[nid].pg_data) | |
| 17 | ||
| 1da177e4 LT |
18 | /* We have these possible memory map layouts: |
| 19 | * Astro: 0-3.75, 67.75-68, 4-64 | |
| 20 | * zx1: 0-1, 257-260, 4-256 | |
| 21 | * Stretch (N-class): 0-2, 4-32, 34-xxx | |
| 22 | */ | |
| 23 | ||
| 24 | /* Since each 1GB can only belong to one region (node), we can create | |
| 25 | * an index table for pfn to nid lookup; each entry in pfnnid_map | |
| 26 | * represents 1GB, and contains the node that the memory belongs to. */ | |
| 27 | ||
| 28 | #define PFNNID_SHIFT (30 - PAGE_SHIFT) | |
| 29 | #define PFNNID_MAP_MAX 512 /* support 512GB */ | |
| 30 | extern unsigned char pfnnid_map[PFNNID_MAP_MAX]; | |
| 31 | ||
| 513e7ecd | 32 | #ifndef CONFIG_64BIT |
| 1da177e4 LT |
33 | #define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT)) |
| 34 | #else | |
| 35 | /* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */ | |
| 36 | #define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT)) | |
| 37 | #endif | |
| 38 | ||
| 39 | static inline int pfn_to_nid(unsigned long pfn) | |
| 40 | { | |
| 41 | unsigned int i; | |
| 1da177e4 LT |
42 | |
| 43 | if (unlikely(pfn_is_io(pfn))) | |
| 44 | return 0; | |
| 45 | ||
| 46 | i = pfn >> PFNNID_SHIFT; | |
| 1dda59b4 | 47 | BUG_ON(i >= ARRAY_SIZE(pfnnid_map)); |
| 1da177e4 | 48 | |
| ae249b5f | 49 | return (int)pfnnid_map[i]; |
| 1da177e4 LT |
50 | } |
| 51 | ||
| 52 | static inline int pfn_valid(int pfn) | |
| 53 | { | |
| 54 | int nid = pfn_to_nid(pfn); | |
| 55 | ||
| 56 | if (nid >= 0) | |
| 57 | return (pfn < node_end_pfn(nid)); | |
| 58 | return 0; | |
| 59 | } | |
| 60 | ||
| 1da177e4 LT |
61 | #endif |
| 62 | #endif /* _PARISC_MMZONE_H */ |