projects / linux-2.6-block.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]) | |
| 1da177e4 | 14 | |
| d49c4288 YL |
15 | #include <asm/numaq.h> |
| 16 | /* summit or generic arch */ | |
| 17 | #include <asm/srat.h> | |
| 1da177e4 | 18 | |
| 7491d33d | 19 | extern int get_memcfg_numa_flat(void); |
| 05b79bdc AW |
20 | /* |
| 21 | * This allows any one NUMA architecture to be compiled | |
| 22 | * for, and still fall back to the flat function if it | |
| 23 | * fails. | |
| 24 | */ | |
| 25 | static inline void get_memcfg_numa(void) | |
| 26 | { | |
| d49c4288 | 27 | |
| 05b79bdc AW |
28 | if (get_memcfg_numaq()) |
| 29 | return; | |
| 05b79bdc AW |
30 | if (get_memcfg_from_srat()) |
| 31 | return; | |
| 05b79bdc AW |
32 | get_memcfg_numa_flat(); |
| 33 | } | |
| 34 | ||
| 97a70e54 RW |
35 | extern void resume_map_numa_kva(pgd_t *pgd); |
| 36 | ||
| 8ff8b27b | 37 | #else /* !CONFIG_NUMA */ |
| 91023300 | 38 | |
| 8ff8b27b | 39 | #define get_memcfg_numa get_memcfg_numa_flat |
| 91023300 | 40 | |
| 97a70e54 RW |
41 | static inline void resume_map_numa_kva(pgd_t *pgd) {} |
| 42 | ||
| 05b79bdc AW |
43 | #endif /* CONFIG_NUMA */ |
| 44 | ||
| 45 | #ifdef CONFIG_DISCONTIGMEM | |
| 1da177e4 LT |
46 | |
| 47 | /* | |
| 48 | * generic node memory support, the following assumptions apply: | |
| 49 | * | |
| af901ca1 | 50 | * 1) memory comes in 64Mb contiguous chunks which are either present or not |
| 1da177e4 LT |
51 | * 2) we will not have more than 64Gb in total |
| 52 | * | |
| 53 | * for now assume that 64Gb is max amount of RAM for whole system | |
| 54 | * 64Gb / 4096bytes/page = 16777216 pages | |
| 55 | */ | |
| 56 | #define MAX_NR_PAGES 16777216 | |
| ba924c81 | 57 | #define MAX_ELEMENTS 1024 |
| 1da177e4 LT |
58 | #define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS) |
| 59 | ||
| 60 | extern s8 physnode_map[]; | |
| 61 | ||
| 62 | static inline int pfn_to_nid(unsigned long pfn) | |
| 63 | { | |
| 64 | #ifdef CONFIG_NUMA | |
| 65 | return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]); | |
| 66 | #else | |
| 67 | return 0; | |
| 68 | #endif | |
| 69 | } | |
| 70 | ||
| 1da177e4 LT |
71 | /* |
| 72 | * Following are macros that each numa implmentation must define. | |
| 73 | */ | |
| 74 | ||
| 1da177e4 LT |
75 | #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) |
| 76 | #define node_end_pfn(nid) \ | |
| 77 | ({ \ | |
| 78 | pg_data_t *__pgdat = NODE_DATA(nid); \ | |
| 79 | __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \ | |
| 80 | }) | |
| 81 | ||
| 1da177e4 LT |
82 | static inline int pfn_valid(int pfn) |
| 83 | { | |
| 84 | int nid = pfn_to_nid(pfn); | |
| 85 | ||
| 86 | if (nid >= 0) | |
| 87 | return (pfn < node_end_pfn(nid)); | |
| 88 | return 0; | |
| 89 | } | |
| 05b79bdc AW |
90 | |
| 91 | #endif /* CONFIG_DISCONTIGMEM */ | |
| 92 | ||
| 93 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
| c1329375 | 94 | /* always use node 0 for bootmem on this numa platform */ |
| d0c4f570 TH |
95 | #define bootmem_arch_preferred_node(__bdata, size, align, goal, limit) \ |
| 96 | (NODE_DATA(0)->bdata) | |
| 05b79bdc | 97 | #endif /* CONFIG_NEED_MULTIPLE_NODES */ |
| b159d43f | 98 | |
| 1965aae3 | 99 | #endif /* _ASM_X86_MMZONE_32_H */ |