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 | |
Vegard Nossum | 77ef50a | 2008-06-18 17:08:48 +0200 | [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 | |
Dave Jones | 8ff8b27 | 2005-07-07 17:56:39 -0700 | [diff] [blame] | 37 | #else /* !CONFIG_NUMA */ |
keith mannthey | 9102330 | 2006-09-25 23:31:03 -0700 | [diff] [blame] | 38 | |
Dave Jones | 8ff8b27 | 2005-07-07 17:56:39 -0700 | [diff] [blame] | 39 | #define get_memcfg_numa get_memcfg_numa_flat |
keith mannthey | 9102330 | 2006-09-25 23:31:03 -0700 | [diff] [blame] | 40 | |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 41 | #endif /* CONFIG_NUMA */ |
| 42 | |
| 43 | #ifdef CONFIG_DISCONTIGMEM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | /* |
| 46 | * generic node memory support, the following assumptions apply: |
| 47 | * |
Yinghai Lu | ba924c8 | 2008-05-31 22:51:51 -0700 | [diff] [blame] | 48 | * 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] | 49 | * 2) we will not have more than 64Gb in total |
| 50 | * |
| 51 | * for now assume that 64Gb is max amount of RAM for whole system |
| 52 | * 64Gb / 4096bytes/page = 16777216 pages |
| 53 | */ |
| 54 | #define MAX_NR_PAGES 16777216 |
Yinghai Lu | ba924c8 | 2008-05-31 22:51:51 -0700 | [diff] [blame] | 55 | #define MAX_ELEMENTS 1024 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS) |
| 57 | |
| 58 | extern s8 physnode_map[]; |
| 59 | |
| 60 | static inline int pfn_to_nid(unsigned long pfn) |
| 61 | { |
| 62 | #ifdef CONFIG_NUMA |
| 63 | return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]); |
| 64 | #else |
| 65 | return 0; |
| 66 | #endif |
| 67 | } |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | /* |
| 70 | * Following are macros that each numa implmentation must define. |
| 71 | */ |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) |
| 74 | #define node_end_pfn(nid) \ |
| 75 | ({ \ |
| 76 | pg_data_t *__pgdat = NODE_DATA(nid); \ |
| 77 | __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \ |
| 78 | }) |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | static inline int pfn_valid(int pfn) |
| 81 | { |
| 82 | int nid = pfn_to_nid(pfn); |
| 83 | |
| 84 | if (nid >= 0) |
| 85 | return (pfn < node_end_pfn(nid)); |
| 86 | return 0; |
| 87 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
| 89 | #endif /* CONFIG_DISCONTIGMEM */ |
Andy Whitcroft | b159d43 | 2005-06-23 00:07:52 -0700 | [diff] [blame] | 90 | |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 91 | #ifdef CONFIG_NEED_MULTIPLE_NODES |
| 92 | |
| 93 | /* |
| 94 | * Following are macros that are specific to this numa platform. |
| 95 | */ |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 96 | #define reserve_bootmem(addr, size, flags) \ |
| 97 | reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags)) |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 98 | #define alloc_bootmem(x) \ |
| 99 | __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) |
Johannes Weiner | 0ed89b0 | 2008-08-13 10:17:24 +0200 | [diff] [blame] | 100 | #define alloc_bootmem_nopanic(x) \ |
| 101 | __alloc_bootmem_node_nopanic(NODE_DATA(0), (x), SMP_CACHE_BYTES, \ |
| 102 | __pa(MAX_DMA_ADDRESS)) |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 103 | #define alloc_bootmem_low(x) \ |
| 104 | __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0) |
| 105 | #define alloc_bootmem_pages(x) \ |
| 106 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) |
Johannes Weiner | 0ed89b0 | 2008-08-13 10:17:24 +0200 | [diff] [blame] | 107 | #define alloc_bootmem_pages_nopanic(x) \ |
| 108 | __alloc_bootmem_node_nopanic(NODE_DATA(0), (x), PAGE_SIZE, \ |
| 109 | __pa(MAX_DMA_ADDRESS)) |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 110 | #define alloc_bootmem_low_pages(x) \ |
| 111 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0) |
Andy Whitcroft | 4af2bfc | 2006-12-06 20:33:04 -0800 | [diff] [blame] | 112 | #define alloc_bootmem_node(pgdat, x) \ |
| 113 | ({ \ |
David Rientjes | c3c117f | 2007-05-09 02:35:30 -0700 | [diff] [blame] | 114 | struct pglist_data __maybe_unused \ |
Andy Whitcroft | 4af2bfc | 2006-12-06 20:33:04 -0800 | [diff] [blame] | 115 | *__alloc_bootmem_node__pgdat = (pgdat); \ |
| 116 | __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \ |
| 117 | __pa(MAX_DMA_ADDRESS)); \ |
| 118 | }) |
| 119 | #define alloc_bootmem_pages_node(pgdat, x) \ |
| 120 | ({ \ |
David Rientjes | c3c117f | 2007-05-09 02:35:30 -0700 | [diff] [blame] | 121 | struct pglist_data __maybe_unused \ |
Andy Whitcroft | 4af2bfc | 2006-12-06 20:33:04 -0800 | [diff] [blame] | 122 | *__alloc_bootmem_node__pgdat = (pgdat); \ |
| 123 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \ |
Glauber de Oliveira Costa | fbac7fc | 2008-03-19 14:25:22 -0300 | [diff] [blame] | 124 | __pa(MAX_DMA_ADDRESS)); \ |
Andy Whitcroft | 4af2bfc | 2006-12-06 20:33:04 -0800 | [diff] [blame] | 125 | }) |
| 126 | #define alloc_bootmem_low_pages_node(pgdat, x) \ |
| 127 | ({ \ |
David Rientjes | c3c117f | 2007-05-09 02:35:30 -0700 | [diff] [blame] | 128 | struct pglist_data __maybe_unused \ |
Andy Whitcroft | 4af2bfc | 2006-12-06 20:33:04 -0800 | [diff] [blame] | 129 | *__alloc_bootmem_node__pgdat = (pgdat); \ |
| 130 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \ |
| 131 | }) |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 132 | #endif /* CONFIG_NEED_MULTIPLE_NODES */ |
| 133 | |
Vegard Nossum | 77ef50a | 2008-06-18 17:08:48 +0200 | [diff] [blame] | 134 | #endif /* ASM_X86__MMZONE_32_H */ |