Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002 | |
3 | * | |
4 | */ | |
5 | ||
77ef50a5 VN |
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 | ||
e8af300c DJ |
35 | extern int early_pfn_to_nid(unsigned long pfn); |
36 | ||
8ff8b27b | 37 | #else /* !CONFIG_NUMA */ |
91023300 | 38 | |
8ff8b27b | 39 | #define get_memcfg_numa get_memcfg_numa_flat |
91023300 | 40 | |
05b79bdc AW |
41 | #endif /* CONFIG_NUMA */ |
42 | ||
43 | #ifdef CONFIG_DISCONTIGMEM | |
1da177e4 LT |
44 | |
45 | /* | |
46 | * generic node memory support, the following assumptions apply: | |
47 | * | |
ba924c81 | 48 | * 1) memory comes in 64Mb contigious chunks which are either present or not |
1da177e4 LT |
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 | |
ba924c81 | 55 | #define MAX_ELEMENTS 1024 |
1da177e4 LT |
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 | ||
1da177e4 LT |
69 | /* |
70 | * Following are macros that each numa implmentation must define. | |
71 | */ | |
72 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | } | |
05b79bdc AW |
88 | |
89 | #endif /* CONFIG_DISCONTIGMEM */ | |
90 | ||
91 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
1da177e4 | 92 | |
1da177e4 | 93 | /* |
05b79bdc | 94 | * Following are macros that are specific to this numa platform. |
1da177e4 | 95 | */ |
72a7fe39 BW |
96 | #define reserve_bootmem(addr, size, flags) \ |
97 | reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags)) | |
05b79bdc AW |
98 | #define alloc_bootmem(x) \ |
99 | __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) | |
0ed89b06 JW |
100 | #define alloc_bootmem_nopanic(x) \ |
101 | __alloc_bootmem_node_nopanic(NODE_DATA(0), (x), SMP_CACHE_BYTES, \ | |
102 | __pa(MAX_DMA_ADDRESS)) | |
05b79bdc AW |
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)) | |
0ed89b06 JW |
107 | #define alloc_bootmem_pages_nopanic(x) \ |
108 | __alloc_bootmem_node_nopanic(NODE_DATA(0), (x), PAGE_SIZE, \ | |
109 | __pa(MAX_DMA_ADDRESS)) | |
05b79bdc AW |
110 | #define alloc_bootmem_low_pages(x) \ |
111 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0) | |
4af2bfc1 AW |
112 | #define alloc_bootmem_node(pgdat, x) \ |
113 | ({ \ | |
c3c117f0 | 114 | struct pglist_data __maybe_unused \ |
4af2bfc1 AW |
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 | ({ \ | |
c3c117f0 | 121 | struct pglist_data __maybe_unused \ |
4af2bfc1 AW |
122 | *__alloc_bootmem_node__pgdat = (pgdat); \ |
123 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \ | |
fbac7fcb | 124 | __pa(MAX_DMA_ADDRESS)); \ |
4af2bfc1 AW |
125 | }) |
126 | #define alloc_bootmem_low_pages_node(pgdat, x) \ | |
127 | ({ \ | |
c3c117f0 | 128 | struct pglist_data __maybe_unused \ |
4af2bfc1 AW |
129 | *__alloc_bootmem_node__pgdat = (pgdat); \ |
130 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \ | |
131 | }) | |
05b79bdc | 132 | #endif /* CONFIG_NEED_MULTIPLE_NODES */ |
b159d43f | 133 | |
77ef50a5 | 134 | #endif /* ASM_X86__MMZONE_32_H */ |