aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/include/asm/mmzone_32.h
blob: 07f1af494ca5c011801c9260a088d2dd34a4ae8e (plain)
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
/*
 * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
 *
 */

#ifndef _ASM_X86_MMZONE_32_H
#define _ASM_X86_MMZONE_32_H

#include <asm/smp.h>

#ifdef CONFIG_NUMA
extern struct pglist_data *node_data[];
#define NODE_DATA(nid)	(node_data[nid])

#include <asm/numaq.h>
/* summit or generic arch */
#include <asm/srat.h>

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)
{

	if (get_memcfg_numaq())
		return;
	if (get_memcfg_from_srat())
		return;
	get_memcfg_numa_flat();
}

extern int early_pfn_to_nid(unsigned long pfn);

extern void resume_map_numa_kva(pgd_t *pgd);

#else /* !CONFIG_NUMA */

#define get_memcfg_numa get_memcfg_numa_flat

static inline void resume_map_numa_kva(pgd_t *pgd) {}

#endif /* CONFIG_NUMA */

#ifdef CONFIG_DISCONTIGMEM

/*
 * generic node memory support, the following assumptions apply:
 *
 * 1) memory comes in 64Mb 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 1024
#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;		\
})

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_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_nopanic(x) \
	__alloc_bootmem_node_nopanic(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_pages_nopanic(x) \
	__alloc_bootmem_node_nopanic(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_X86_MMZONE_32_H */