projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 17 | /* | |
| 18 | * Given a kernel address, find the home node of the underlying memory. | |
| 19 | */ | |
| 20 | #define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT) | |
| 21 | ||
| 1da177e4 LT |
22 | #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) |
| 23 | #define node_end_pfn(nid) \ | |
| 24 | ({ \ | |
| 25 | pg_data_t *__pgdat = NODE_DATA(nid); \ | |
| 26 | __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \ | |
| 27 | }) | |
| 28 | #define node_localnr(pfn, nid) ((pfn) - node_start_pfn(nid)) | |
| 29 | ||
| 1da177e4 LT |
30 | #define pfn_to_page(pfn) \ |
| 31 | ({ \ | |
| 32 | unsigned long __pfn = (pfn); \ | |
| 33 | int __node = pfn_to_nid(__pfn); \ | |
| 408fde81 | 34 | &NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)]; \ |
| 1da177e4 LT |
35 | }) |
| 36 | ||
| 37 | #define page_to_pfn(pg) \ | |
| 38 | ({ \ | |
| 39 | struct page *__page = pg; \ | |
| 40 | struct zone *__zone = page_zone(__page); \ | |
| 41 | BUG_ON(__zone == NULL); \ | |
| 42 | (unsigned long)(__page - __zone->zone_mem_map) \ | |
| 43 | + __zone->zone_start_pfn; \ | |
| 44 | }) | |
| 45 | ||
| 46 | /* We have these possible memory map layouts: | |
| 47 | * Astro: 0-3.75, 67.75-68, 4-64 | |
| 48 | * zx1: 0-1, 257-260, 4-256 | |
| 49 | * Stretch (N-class): 0-2, 4-32, 34-xxx | |
| 50 | */ | |
| 51 | ||
| 52 | /* Since each 1GB can only belong to one region (node), we can create | |
| 53 | * an index table for pfn to nid lookup; each entry in pfnnid_map | |
| 54 | * represents 1GB, and contains the node that the memory belongs to. */ | |
| 55 | ||
| 56 | #define PFNNID_SHIFT (30 - PAGE_SHIFT) | |
| 57 | #define PFNNID_MAP_MAX 512 /* support 512GB */ | |
| 58 | extern unsigned char pfnnid_map[PFNNID_MAP_MAX]; | |
| 59 | ||
| 60 | #ifndef __LP64__ | |
| 61 | #define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT)) | |
| 62 | #else | |
| 63 | /* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */ | |
| 64 | #define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT)) | |
| 65 | #endif | |
| 66 | ||
| 67 | static inline int pfn_to_nid(unsigned long pfn) | |
| 68 | { | |
| 69 | unsigned int i; | |
| 70 | unsigned char r; | |
| 71 | ||
| 72 | if (unlikely(pfn_is_io(pfn))) | |
| 73 | return 0; | |
| 74 | ||
| 75 | i = pfn >> PFNNID_SHIFT; | |
| 76 | BUG_ON(i >= sizeof(pfnnid_map) / sizeof(pfnnid_map[0])); | |
| 77 | r = pfnnid_map[i]; | |
| 78 | BUG_ON(r == 0xff); | |
| 79 | ||
| 80 | return (int)r; | |
| 81 | } | |
| 82 | ||
| 83 | static inline int pfn_valid(int pfn) | |
| 84 | { | |
| 85 | int nid = pfn_to_nid(pfn); | |
| 86 | ||
| 87 | if (nid >= 0) | |
| 88 | return (pfn < node_end_pfn(nid)); | |
| 89 | return 0; | |
| 90 | } | |
| 91 | ||
| 92 | #else /* !CONFIG_DISCONTIGMEM */ | |
| 93 | #define MAX_PHYSMEM_RANGES 1 | |
| 94 | #endif | |
| 95 | #endif /* _PARISC_MMZONE_H */ |