blob: ecc4b07507d65f097ed68e5498be6b6b65483e33 (
plain) (
blame)
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
|
/*
* Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
*
* PowerPC64 port:
* Copyright (C) 2002 Anton Blanchard, IBM Corp.
*/
#ifndef _ASM_MMZONE_H_
#define _ASM_MMZONE_H_
#include <linux/config.h>
#include <asm/smp.h>
#ifdef CONFIG_DISCONTIGMEM
extern struct pglist_data *node_data[];
/*
* Following are specific to this numa platform.
*/
extern int numa_cpu_lookup_table[];
extern char *numa_memory_lookup_table;
extern cpumask_t numa_cpumask_lookup_table[];
extern int nr_cpus_in_node[];
/* 16MB regions */
#define MEMORY_INCREMENT_SHIFT 24
#define MEMORY_INCREMENT (1UL << MEMORY_INCREMENT_SHIFT)
/* NUMA debugging, will not work on a DLPAR machine */
#undef DEBUG_NUMA
static inline int pa_to_nid(unsigned long pa)
{
int nid;
nid = numa_memory_lookup_table[pa >> MEMORY_INCREMENT_SHIFT];
#ifdef DEBUG_NUMA
/* the physical address passed in is not in the map for the system */
if (nid == -1) {
printk("bad address: %lx\n", pa);
BUG();
}
#endif
return nid;
}
#define pfn_to_nid(pfn) pa_to_nid((pfn) << PAGE_SHIFT)
/*
* Return a pointer to the node data for node n.
*/
#define NODE_DATA(nid) (node_data[nid])
#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
/*
* Following are macros that each numa implmentation must define.
*/
/*
* Given a kernel address, find the home node of the underlying memory.
*/
#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) (NODE_DATA(nid)->node_end_pfn)
#define local_mapnr(kvaddr) \
( (__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr))
/* Written this way to avoid evaluating arguments twice */
#define discontigmem_pfn_to_page(pfn) \
({ \
unsigned long __tmp = pfn; \
(NODE_DATA(pfn_to_nid(__tmp))->node_mem_map + \
node_localnr(__tmp, pfn_to_nid(__tmp))); \
})
#define discontigmem_page_to_pfn(p) \
({ \
struct page *__tmp = p; \
(((__tmp) - page_zone(__tmp)->zone_mem_map) + \
page_zone(__tmp)->zone_start_pfn); \
})
/* XXX fix for discontiguous physical memory */
#define discontigmem_pfn_valid(pfn) ((pfn) < num_physpages)
#endif /* CONFIG_DISCONTIGMEM */
#ifdef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
#define early_pfn_to_nid(pfn) pa_to_nid(((unsigned long)pfn) << PAGE_SHIFT)
#endif
#endif /* _ASM_MMZONE_H_ */
|
