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authorIngo Molnar <mingo@elte.hu>2008-10-27 07:38:02 -0400
committerIngo Molnar <mingo@elte.hu>2008-10-27 07:38:02 -0400
commit5292ae11babca23c3ff82593630d2d7eebc350a9 (patch)
tree30a6c8123b35686098f306ea39398b7621f42054 /arch/x86/include/asm/mmzone_32.h
parentb0f209898f1a177bd503d49215b8c6628797a81c (diff)
parent0173a3265b228da319ceb9c1ec6a5682fd1b2d92 (diff)
Merge commit 'v2.6.28-rc2' into x86/uv
Diffstat (limited to 'arch/x86/include/asm/mmzone_32.h')
-rw-r--r--arch/x86/include/asm/mmzone_32.h134
1 files changed, 134 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mmzone_32.h b/arch/x86/include/asm/mmzone_32.h
new file mode 100644
index 000000000000..485bdf059ffb
--- /dev/null
+++ b/arch/x86/include/asm/mmzone_32.h
@@ -0,0 +1,134 @@
1/*
2 * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
3 *
4 */
5
6#ifndef _ASM_X86_MMZONE_32_H
7#define _ASM_X86_MMZONE_32_H
8
9#include <asm/smp.h>
10
11#ifdef CONFIG_NUMA
12extern struct pglist_data *node_data[];
13#define NODE_DATA(nid) (node_data[nid])
14
15#include <asm/numaq.h>
16/* summit or generic arch */
17#include <asm/srat.h>
18
19extern int get_memcfg_numa_flat(void);
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 */
25static inline void get_memcfg_numa(void)
26{
27
28 if (get_memcfg_numaq())
29 return;
30 if (get_memcfg_from_srat())
31 return;
32 get_memcfg_numa_flat();
33}
34
35extern int early_pfn_to_nid(unsigned long pfn);
36
37#else /* !CONFIG_NUMA */
38
39#define get_memcfg_numa get_memcfg_numa_flat
40
41#endif /* CONFIG_NUMA */
42
43#ifdef CONFIG_DISCONTIGMEM
44
45/*
46 * generic node memory support, the following assumptions apply:
47 *
48 * 1) memory comes in 64Mb contigious chunks which are either present or not
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
55#define MAX_ELEMENTS 1024
56#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
57
58extern s8 physnode_map[];
59
60static 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
69/*
70 * Following are macros that each numa implmentation must define.
71 */
72
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
80static 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}
88
89#endif /* CONFIG_DISCONTIGMEM */
90
91#ifdef CONFIG_NEED_MULTIPLE_NODES
92
93/*
94 * Following are macros that are specific to this numa platform.
95 */
96#define reserve_bootmem(addr, size, flags) \
97 reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
98#define alloc_bootmem(x) \
99 __alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
100#define alloc_bootmem_nopanic(x) \
101 __alloc_bootmem_node_nopanic(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
102 __pa(MAX_DMA_ADDRESS))
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))
107#define alloc_bootmem_pages_nopanic(x) \
108 __alloc_bootmem_node_nopanic(NODE_DATA(0), (x), PAGE_SIZE, \
109 __pa(MAX_DMA_ADDRESS))
110#define alloc_bootmem_low_pages(x) \
111 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
112#define alloc_bootmem_node(pgdat, x) \
113({ \
114 struct pglist_data __maybe_unused \
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({ \
121 struct pglist_data __maybe_unused \
122 *__alloc_bootmem_node__pgdat = (pgdat); \
123 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
124 __pa(MAX_DMA_ADDRESS)); \
125})
126#define alloc_bootmem_low_pages_node(pgdat, x) \
127({ \
128 struct pglist_data __maybe_unused \
129 *__alloc_bootmem_node__pgdat = (pgdat); \
130 __alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
131})
132#endif /* CONFIG_NEED_MULTIPLE_NODES */
133
134#endif /* _ASM_X86_MMZONE_32_H */