Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002 | |
3 | * | |
4 | */ | |
5 | ||
6 | #ifndef _ASM_MMZONE_H_ | |
7 | #define _ASM_MMZONE_H_ | |
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 | |
8ff8b27b DJ |
15 | #ifdef CONFIG_X86_NUMAQ |
16 | #include <asm/numaq.h> | |
4e54bdaa | 17 | #elif defined(CONFIG_ACPI_SRAT)/* summit or generic arch */ |
8ff8b27b DJ |
18 | #include <asm/srat.h> |
19 | #endif | |
1da177e4 | 20 | |
05b79bdc AW |
21 | extern int get_memcfg_numa_flat(void ); |
22 | /* | |
23 | * This allows any one NUMA architecture to be compiled | |
24 | * for, and still fall back to the flat function if it | |
25 | * fails. | |
26 | */ | |
27 | static inline void get_memcfg_numa(void) | |
28 | { | |
29 | #ifdef CONFIG_X86_NUMAQ | |
30 | if (get_memcfg_numaq()) | |
31 | return; | |
abda2452 | 32 | #elif defined(CONFIG_ACPI_SRAT) |
05b79bdc AW |
33 | if (get_memcfg_from_srat()) |
34 | return; | |
35 | #endif | |
36 | ||
37 | get_memcfg_numa_flat(); | |
38 | } | |
39 | ||
e8af300c | 40 | extern int early_pfn_to_nid(unsigned long pfn); |
91023300 | 41 | extern void numa_kva_reserve(void); |
e8af300c | 42 | |
8ff8b27b | 43 | #else /* !CONFIG_NUMA */ |
91023300 | 44 | |
8ff8b27b DJ |
45 | #define get_memcfg_numa get_memcfg_numa_flat |
46 | #define get_zholes_size(n) (0) | |
91023300 | 47 | |
48 | static inline void numa_kva_reserve(void) | |
49 | { | |
50 | } | |
05b79bdc AW |
51 | #endif /* CONFIG_NUMA */ |
52 | ||
53 | #ifdef CONFIG_DISCONTIGMEM | |
1da177e4 LT |
54 | |
55 | /* | |
56 | * generic node memory support, the following assumptions apply: | |
57 | * | |
58 | * 1) memory comes in 256Mb contigious chunks which are either present or not | |
59 | * 2) we will not have more than 64Gb in total | |
60 | * | |
61 | * for now assume that 64Gb is max amount of RAM for whole system | |
62 | * 64Gb / 4096bytes/page = 16777216 pages | |
63 | */ | |
64 | #define MAX_NR_PAGES 16777216 | |
65 | #define MAX_ELEMENTS 256 | |
66 | #define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS) | |
67 | ||
68 | extern s8 physnode_map[]; | |
69 | ||
70 | static inline int pfn_to_nid(unsigned long pfn) | |
71 | { | |
72 | #ifdef CONFIG_NUMA | |
73 | return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]); | |
74 | #else | |
75 | return 0; | |
76 | #endif | |
77 | } | |
78 | ||
1da177e4 LT |
79 | /* |
80 | * Following are macros that each numa implmentation must define. | |
81 | */ | |
82 | ||
1da177e4 LT |
83 | #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) |
84 | #define node_end_pfn(nid) \ | |
85 | ({ \ | |
86 | pg_data_t *__pgdat = NODE_DATA(nid); \ | |
87 | __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \ | |
88 | }) | |
89 | ||
1da177e4 LT |
90 | #ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */ |
91 | #define pfn_valid(pfn) ((pfn) < num_physpages) | |
92 | #else | |
93 | static inline int pfn_valid(int pfn) | |
94 | { | |
95 | int nid = pfn_to_nid(pfn); | |
96 | ||
97 | if (nid >= 0) | |
98 | return (pfn < node_end_pfn(nid)); | |
99 | return 0; | |
100 | } | |
05b79bdc AW |
101 | #endif /* CONFIG_X86_NUMAQ */ |
102 | ||
103 | #endif /* CONFIG_DISCONTIGMEM */ | |
104 | ||
105 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
1da177e4 | 106 | |
1da177e4 | 107 | /* |
05b79bdc | 108 | * Following are macros that are specific to this numa platform. |
1da177e4 | 109 | */ |
72a7fe39 BW |
110 | #define reserve_bootmem(addr, size, flags) \ |
111 | reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags)) | |
05b79bdc AW |
112 | #define alloc_bootmem(x) \ |
113 | __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) | |
114 | #define alloc_bootmem_low(x) \ | |
115 | __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0) | |
116 | #define alloc_bootmem_pages(x) \ | |
117 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) | |
118 | #define alloc_bootmem_low_pages(x) \ | |
119 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0) | |
4af2bfc1 AW |
120 | #define alloc_bootmem_node(pgdat, x) \ |
121 | ({ \ | |
c3c117f0 | 122 | struct pglist_data __maybe_unused \ |
4af2bfc1 AW |
123 | *__alloc_bootmem_node__pgdat = (pgdat); \ |
124 | __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \ | |
125 | __pa(MAX_DMA_ADDRESS)); \ | |
126 | }) | |
127 | #define alloc_bootmem_pages_node(pgdat, x) \ | |
128 | ({ \ | |
c3c117f0 | 129 | struct pglist_data __maybe_unused \ |
4af2bfc1 AW |
130 | *__alloc_bootmem_node__pgdat = (pgdat); \ |
131 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \ | |
132 | __pa(MAX_DMA_ADDRESS)) \ | |
133 | }) | |
134 | #define alloc_bootmem_low_pages_node(pgdat, x) \ | |
135 | ({ \ | |
c3c117f0 | 136 | struct pglist_data __maybe_unused \ |
4af2bfc1 AW |
137 | *__alloc_bootmem_node__pgdat = (pgdat); \ |
138 | __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \ | |
139 | }) | |
05b79bdc | 140 | #endif /* CONFIG_NEED_MULTIPLE_NODES */ |
b159d43f | 141 | |
1da177e4 | 142 | #endif /* _ASM_MMZONE_H_ */ |