Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002 |
| 3 | * |
| 4 | */ |
| 5 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 6 | #ifndef _ASM_X86_MMZONE_32_H |
| 7 | #define _ASM_X86_MMZONE_32_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | #include <asm/smp.h> |
| 10 | |
Dave Jones | 8ff8b27 | 2005-07-07 17:56:39 -0700 | [diff] [blame] | 11 | #ifdef CONFIG_NUMA |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 12 | extern struct pglist_data *node_data[]; |
| 13 | #define NODE_DATA(nid) (node_data[nid]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 15 | #include <asm/numaq.h> |
| 16 | /* summit or generic arch */ |
| 17 | #include <asm/srat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
Joe Perches | 7491d33 | 2008-03-23 01:02:46 -0700 | [diff] [blame] | 19 | extern int get_memcfg_numa_flat(void); |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 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 | { |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 27 | |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 28 | if (get_memcfg_numaq()) |
| 29 | return; |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 30 | if (get_memcfg_from_srat()) |
| 31 | return; |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 32 | get_memcfg_numa_flat(); |
| 33 | } |
| 34 | |
Dave Jones | e8af300 | 2005-07-07 17:56:39 -0700 | [diff] [blame] | 35 | extern int early_pfn_to_nid(unsigned long pfn); |
| 36 | |
Rafael J. Wysocki | 97a70e5 | 2008-11-12 23:22:35 +0100 | [diff] [blame] | 37 | extern void resume_map_numa_kva(pgd_t *pgd); |
| 38 | |
Dave Jones | 8ff8b27 | 2005-07-07 17:56:39 -0700 | [diff] [blame] | 39 | #else /* !CONFIG_NUMA */ |
keith mannthey | 9102330 | 2006-09-25 23:31:03 -0700 | [diff] [blame] | 40 | |
Dave Jones | 8ff8b27 | 2005-07-07 17:56:39 -0700 | [diff] [blame] | 41 | #define get_memcfg_numa get_memcfg_numa_flat |
keith mannthey | 9102330 | 2006-09-25 23:31:03 -0700 | [diff] [blame] | 42 | |
Rafael J. Wysocki | 97a70e5 | 2008-11-12 23:22:35 +0100 | [diff] [blame] | 43 | static inline void resume_map_numa_kva(pgd_t *pgd) {} |
| 44 | |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 45 | #endif /* CONFIG_NUMA */ |
| 46 | |
| 47 | #ifdef CONFIG_DISCONTIGMEM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | /* |
| 50 | * generic node memory support, the following assumptions apply: |
| 51 | * |
Yinghai Lu | ba924c8 | 2008-05-31 22:51:51 -0700 | [diff] [blame] | 52 | * 1) memory comes in 64Mb contigious chunks which are either present or not |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | * 2) we will not have more than 64Gb in total |
| 54 | * |
| 55 | * for now assume that 64Gb is max amount of RAM for whole system |
| 56 | * 64Gb / 4096bytes/page = 16777216 pages |
| 57 | */ |
| 58 | #define MAX_NR_PAGES 16777216 |
Yinghai Lu | ba924c8 | 2008-05-31 22:51:51 -0700 | [diff] [blame] | 59 | #define MAX_ELEMENTS 1024 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS) |
| 61 | |
| 62 | extern s8 physnode_map[]; |
| 63 | |
| 64 | static inline int pfn_to_nid(unsigned long pfn) |
| 65 | { |
| 66 | #ifdef CONFIG_NUMA |
| 67 | return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]); |
| 68 | #else |
| 69 | return 0; |
| 70 | #endif |
| 71 | } |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | /* |
| 74 | * Following are macros that each numa implmentation must define. |
| 75 | */ |
| 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) |
| 78 | #define node_end_pfn(nid) \ |
| 79 | ({ \ |
| 80 | pg_data_t *__pgdat = NODE_DATA(nid); \ |
| 81 | __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \ |
| 82 | }) |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | static inline int pfn_valid(int pfn) |
| 85 | { |
| 86 | int nid = pfn_to_nid(pfn); |
| 87 | |
| 88 | if (nid >= 0) |
| 89 | return (pfn < node_end_pfn(nid)); |
| 90 | return 0; |
| 91 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | #endif /* CONFIG_DISCONTIGMEM */ |
Andy Whitcroft | b159d43 | 2005-06-23 00:07:52 -0700 | [diff] [blame] | 94 | |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 95 | #ifdef CONFIG_NEED_MULTIPLE_NODES |
Tejun Heo | c132937 | 2009-02-24 11:57:20 +0900 | [diff] [blame^] | 96 | /* always use node 0 for bootmem on this numa platform */ |
| 97 | #define alloc_bootmem_core(__bdata, size, align, goal, limit) \ |
Andy Whitcroft | 4af2bfc | 2006-12-06 20:33:04 -0800 | [diff] [blame] | 98 | ({ \ |
Tejun Heo | c132937 | 2009-02-24 11:57:20 +0900 | [diff] [blame^] | 99 | bootmem_data_t __maybe_unused * __abm_bdata_dummy = (__bdata); \ |
| 100 | __alloc_bootmem_core(NODE_DATA(0)->bdata, \ |
| 101 | (size), (align), (goal), (limit)); \ |
Andy Whitcroft | 4af2bfc | 2006-12-06 20:33:04 -0800 | [diff] [blame] | 102 | }) |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 103 | #endif /* CONFIG_NEED_MULTIPLE_NODES */ |
| 104 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 105 | #endif /* _ASM_X86_MMZONE_32_H */ |