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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Dave Jones8ff8b272005-07-07 17:56:39 -070011#ifdef CONFIG_NUMA
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070012extern struct pglist_data *node_data[];
13#define NODE_DATA(nid) (node_data[nid])
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
Dave Jones8ff8b272005-07-07 17:56:39 -070015#ifdef CONFIG_X86_NUMAQ
16 #include <asm/numaq.h>
KAMEZAWA Hiroyuki4e54bda2006-08-27 01:23:55 -070017#elif defined(CONFIG_ACPI_SRAT)/* summit or generic arch */
Dave Jones8ff8b272005-07-07 17:56:39 -070018 #include <asm/srat.h>
19#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
Joe Perches7491d332008-03-23 01:02:46 -070021extern int get_memcfg_numa_flat(void);
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070022/*
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 */
27static inline void get_memcfg_numa(void)
28{
29#ifdef CONFIG_X86_NUMAQ
30 if (get_memcfg_numaq())
31 return;
Magnus Dammabda2452005-09-09 13:01:23 -070032#elif defined(CONFIG_ACPI_SRAT)
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070033 if (get_memcfg_from_srat())
34 return;
35#endif
36
37 get_memcfg_numa_flat();
38}
39
Dave Jonese8af3002005-07-07 17:56:39 -070040extern int early_pfn_to_nid(unsigned long pfn);
keith mannthey91023302006-09-25 23:31:03 -070041extern void numa_kva_reserve(void);
Dave Jonese8af3002005-07-07 17:56:39 -070042
Dave Jones8ff8b272005-07-07 17:56:39 -070043#else /* !CONFIG_NUMA */
keith mannthey91023302006-09-25 23:31:03 -070044
Dave Jones8ff8b272005-07-07 17:56:39 -070045#define get_memcfg_numa get_memcfg_numa_flat
46#define get_zholes_size(n) (0)
keith mannthey91023302006-09-25 23:31:03 -070047
48static inline void numa_kva_reserve(void)
49{
50}
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070051#endif /* CONFIG_NUMA */
52
53#ifdef CONFIG_DISCONTIGMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
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
68extern s8 physnode_map[];
69
70static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070079/*
80 * Following are macros that each numa implmentation must define.
81 */
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070090#ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
91#define pfn_valid(pfn) ((pfn) < num_physpages)
92#else
93static 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}
Andy Whitcroft05b79bd2005-06-23 00:07:57 -0700101#endif /* CONFIG_X86_NUMAQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103#endif /* CONFIG_DISCONTIGMEM */
Andy Whitcroftb159d432005-06-23 00:07:52 -0700104
Andy Whitcroft05b79bd2005-06-23 00:07:57 -0700105#ifdef CONFIG_NEED_MULTIPLE_NODES
106
107/*
108 * Following are macros that are specific to this numa platform.
109 */
Bernhard Walle72a7fe32008-02-07 00:15:17 -0800110#define reserve_bootmem(addr, size, flags) \
111 reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
Andy Whitcroft05b79bd2005-06-23 00:07:57 -0700112#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)
Andy Whitcroft4af2bfc2006-12-06 20:33:04 -0800120#define alloc_bootmem_node(pgdat, x) \
121({ \
David Rientjesc3c117f2007-05-09 02:35:30 -0700122 struct pglist_data __maybe_unused \
Andy Whitcroft4af2bfc2006-12-06 20:33:04 -0800123 *__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({ \
David Rientjesc3c117f2007-05-09 02:35:30 -0700129 struct pglist_data __maybe_unused \
Andy Whitcroft4af2bfc2006-12-06 20:33:04 -0800130 *__alloc_bootmem_node__pgdat = (pgdat); \
131 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
Glauber de Oliveira Costafbac7fc2008-03-19 14:25:22 -0300132 __pa(MAX_DMA_ADDRESS)); \
Andy Whitcroft4af2bfc2006-12-06 20:33:04 -0800133})
134#define alloc_bootmem_low_pages_node(pgdat, x) \
135({ \
David Rientjesc3c117f2007-05-09 02:35:30 -0700136 struct pglist_data __maybe_unused \
Andy Whitcroft4af2bfc2006-12-06 20:33:04 -0800137 *__alloc_bootmem_node__pgdat = (pgdat); \
138 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
139})
Andy Whitcroft05b79bd2005-06-23 00:07:57 -0700140#endif /* CONFIG_NEED_MULTIPLE_NODES */
141
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142#endif /* _ASM_MMZONE_H_ */