1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
*
*/
#ifndef _ASM_MMZONE_H_
#define _ASM_MMZONE_H_
#include <asm/smp.h>
#ifdef CONFIG_NUMA
extern struct pglist_data *node_data[];
#define NODE_DATA(nid) (node_data[nid])
#ifdef CONFIG_X86_NUMAQ
#include <asm/numaq.h>
#elif defined(CONFIG_ACPI_SRAT)/* summit or generic arch */
#include <asm/srat.h>
#endif
extern int get_memcfg_numa_flat(void );
/*
* This allows any one NUMA architecture to be compiled
* for, and still fall back to the flat function if it
* fails.
*/
static inline void get_memcfg_numa(void)
{
#ifdef CONFIG_X86_NUMAQ
if (get_memcfg_numaq())
return;
#elif defined(CONFIG_ACPI_SRAT)
if (get_memcfg_from_srat())
return;
#endif
get_memcfg_numa_flat();
}
extern int early_pfn_to_nid(unsigned long pfn);
extern void numa_kva_reserve(void);
#else /* !CONFIG_NUMA */
#define get_memcfg_numa get_memcfg_numa_flat
#define get_zholes_size(n) (0)
static inline void numa_kva_reserve(void)
{
}
#endif /* CONFIG_NUMA */
#ifdef CONFIG_DISCONTIGMEM
/*
* generic node memory support, the following assumptions apply:
*
* 1) memory comes in 256Mb contigious chunks which are either present or not
* 2) we will not have more than 64Gb in total
*
* for now assume that 64Gb is max amount of RAM for whole system
* 64Gb / 4096bytes/page = 16777216 pages
*/
#define MAX_NR_PAGES 16777216
#define MAX_ELEMENTS 256
#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
extern s8 physnode_map[];
static inline int pfn_to_nid(unsigned long pfn)
{
#ifdef CONFIG_NUMA
return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
#else
return 0;
#endif
}
/*
* Following are macros that each numa implmentation must define.
*/
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) \
({ \
pg_data_t *__pgdat = NODE_DATA(nid); \
__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
})
#ifdef CONFIG_X86_NUMAQ /* we have contiguous memory on NUMA-Q */
#define pfn_valid(pfn) ((pfn) < num_physpages)
#else
static inline int pfn_valid(int pfn)
{
int nid = pfn_to_nid(pfn);
if (nid >= 0)
return (pfn < node_end_pfn(nid));
return 0;
}
#endif /* CONFIG_X86_NUMAQ */
#endif /* CONFIG_DISCONTIGMEM */
#ifdef CONFIG_NEED_MULTIPLE_NODES
/*
* Following are macros that are specific to this numa platform.
*/
#define reserve_bootmem(addr, size, flags) \
reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
#define alloc_bootmem(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
#define alloc_bootmem_pages(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
#define alloc_bootmem_node(pgdat, x) \
({ \
struct pglist_data __maybe_unused \
*__alloc_bootmem_node__pgdat = (pgdat); \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
__pa(MAX_DMA_ADDRESS)); \
})
#define alloc_bootmem_pages_node(pgdat, x) \
({ \
struct pglist_data __maybe_unused \
*__alloc_bootmem_node__pgdat = (pgdat); \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
__pa(MAX_DMA_ADDRESS)); \
})
#define alloc_bootmem_low_pages_node(pgdat, x) \
({ \
struct pglist_data __maybe_unused \
*__alloc_bootmem_node__pgdat = (pgdat); \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
})
#endif /* CONFIG_NEED_MULTIPLE_NODES */
#endif /* _ASM_MMZONE_H_ */
|
