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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
H. Peter Anvin1965aae2008-10-22 22:26:29 -07006#ifndef _ASM_X86_MMZONE_32_H
7#define _ASM_X86_MMZONE_32_H
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
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
Yinghai Lud49c4282008-06-08 18:31:54 -070015#include <asm/numaq.h>
16/* summit or generic arch */
17#include <asm/srat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Joe Perches7491d332008-03-23 01:02:46 -070019extern int get_memcfg_numa_flat(void);
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070020/*
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{
Yinghai Lud49c4282008-06-08 18:31:54 -070027
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070028 if (get_memcfg_numaq())
29 return;
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070030 if (get_memcfg_from_srat())
31 return;
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070032 get_memcfg_numa_flat();
33}
34
Dave Jonese8af3002005-07-07 17:56:39 -070035extern int early_pfn_to_nid(unsigned long pfn);
36
Rafael J. Wysocki97a70e52008-11-12 23:22:35 +010037extern void resume_map_numa_kva(pgd_t *pgd);
38
Dave Jones8ff8b272005-07-07 17:56:39 -070039#else /* !CONFIG_NUMA */
keith mannthey91023302006-09-25 23:31:03 -070040
Dave Jones8ff8b272005-07-07 17:56:39 -070041#define get_memcfg_numa get_memcfg_numa_flat
keith mannthey91023302006-09-25 23:31:03 -070042
Rafael J. Wysocki97a70e52008-11-12 23:22:35 +010043static inline void resume_map_numa_kva(pgd_t *pgd) {}
44
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070045#endif /* CONFIG_NUMA */
46
47#ifdef CONFIG_DISCONTIGMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49/*
50 * generic node memory support, the following assumptions apply:
51 *
Yinghai Luba924c82008-05-31 22:51:51 -070052 * 1) memory comes in 64Mb contigious chunks which are either present or not
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 * 2) we will not have more than 64Gb in total
54 *
55 * for now assume that 64Gb is max amount of RAM for whole system
56 * 64Gb / 4096bytes/page = 16777216 pages
57 */
58#define MAX_NR_PAGES 16777216
Yinghai Luba924c82008-05-31 22:51:51 -070059#define MAX_ELEMENTS 1024
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
61
62extern s8 physnode_map[];
63
64static inline int pfn_to_nid(unsigned long pfn)
65{
66#ifdef CONFIG_NUMA
67 return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
68#else
69 return 0;
70#endif
71}
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073/*
74 * Following are macros that each numa implmentation must define.
75 */
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
78#define node_end_pfn(nid) \
79({ \
80 pg_data_t *__pgdat = NODE_DATA(nid); \
81 __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
82})
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084static inline int pfn_valid(int pfn)
85{
86 int nid = pfn_to_nid(pfn);
87
88 if (nid >= 0)
89 return (pfn < node_end_pfn(nid));
90 return 0;
91}
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93#endif /* CONFIG_DISCONTIGMEM */
Andy Whitcroftb159d432005-06-23 00:07:52 -070094
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070095#ifdef CONFIG_NEED_MULTIPLE_NODES
Tejun Heoc1329372009-02-24 11:57:20 +090096/* always use node 0 for bootmem on this numa platform */
97#define alloc_bootmem_core(__bdata, size, align, goal, limit) \
Andy Whitcroft4af2bfc2006-12-06 20:33:04 -080098({ \
Tejun Heoc1329372009-02-24 11:57:20 +090099 bootmem_data_t __maybe_unused * __abm_bdata_dummy = (__bdata); \
100 __alloc_bootmem_core(NODE_DATA(0)->bdata, \
101 (size), (align), (goal), (limit)); \
Andy Whitcroft4af2bfc2006-12-06 20:33:04 -0800102})
Andy Whitcroft05b79bd2005-06-23 00:07:57 -0700103#endif /* CONFIG_NEED_MULTIPLE_NODES */
104
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700105#endif /* _ASM_X86_MMZONE_32_H */