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Linux kernel mirror (for testing)
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kernel
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linux
1/*
2 * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
3 * Adapted for the alpha wildfire architecture Jan 2001.
4 */
5#ifndef _ASM_MMZONE_H_
6#define _ASM_MMZONE_H_
7
8#include <linux/config.h>
9#include <asm/smp.h>
10
11struct bootmem_data_t; /* stupid forward decl. */
12
13/*
14 * Following are macros that are specific to this numa platform.
15 */
16
17extern pg_data_t node_data[];
18
19#define alpha_pa_to_nid(pa) \
20 (alpha_mv.pa_to_nid \
21 ? alpha_mv.pa_to_nid(pa) \
22 : (0))
23#define node_mem_start(nid) \
24 (alpha_mv.node_mem_start \
25 ? alpha_mv.node_mem_start(nid) \
26 : (0UL))
27#define node_mem_size(nid) \
28 (alpha_mv.node_mem_size \
29 ? alpha_mv.node_mem_size(nid) \
30 : ((nid) ? (0UL) : (~0UL)))
31
32#define pa_to_nid(pa) alpha_pa_to_nid(pa)
33#define NODE_DATA(nid) (&node_data[(nid)])
34
35#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
36
37#if 1
38#define PLAT_NODE_DATA_LOCALNR(p, n) \
39 (((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
40#else
41static inline unsigned long
42PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
43{
44 unsigned long temp;
45 temp = p >> PAGE_SHIFT;
46 return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
47}
48#endif
49
50#ifdef CONFIG_DISCONTIGMEM
51
52/*
53 * Following are macros that each numa implementation must define.
54 */
55
56/*
57 * Given a kernel address, find the home node of the underlying memory.
58 */
59#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
60#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
61
62#define local_mapnr(kvaddr) \
63 ((__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr)))
64
65/*
66 * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
67 * and returns the kaddr corresponding to first physical page in the
68 * node's mem_map.
69 */
70#define LOCAL_BASE_ADDR(kaddr) \
71 ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn \
72 << PAGE_SHIFT))
73
74/* XXX: FIXME -- wli */
75#define kern_addr_valid(kaddr) (0)
76
77#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
78
79#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
80
81#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> 32))
82#define pte_pfn(pte) (pte_val(pte) >> 32)
83
84#define mk_pte(page, pgprot) \
85({ \
86 pte_t pte; \
87 unsigned long pfn; \
88 \
89 pfn = ((unsigned long)((page)-page_zone(page)->zone_mem_map)) << 32; \
90 pfn += page_zone(page)->zone_start_pfn << 32; \
91 pte_val(pte) = pfn | pgprot_val(pgprot); \
92 \
93 pte; \
94})
95
96#define pte_page(x) \
97({ \
98 unsigned long kvirt; \
99 struct page * __xx; \
100 \
101 kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT)); \
102 __xx = virt_to_page(kvirt); \
103 \
104 __xx; \
105})
106
107#define pfn_to_page(pfn) \
108({ \
109 unsigned long kaddr = (unsigned long)__va((pfn) << PAGE_SHIFT); \
110 (NODE_DATA(kvaddr_to_nid(kaddr))->node_mem_map + local_mapnr(kaddr)); \
111})
112
113#define page_to_pfn(page) \
114 ((page) - page_zone(page)->zone_mem_map + \
115 (page_zone(page)->zone_start_pfn))
116
117#define page_to_pa(page) \
118 ((( (page) - page_zone(page)->zone_mem_map ) \
119 + page_zone(page)->zone_start_pfn) << PAGE_SHIFT)
120
121#define pfn_to_nid(pfn) pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
122#define pfn_valid(pfn) \
123 (((pfn) - node_start_pfn(pfn_to_nid(pfn))) < \
124 node_spanned_pages(pfn_to_nid(pfn))) \
125
126#define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
127
128#endif /* CONFIG_DISCONTIGMEM */
129
130#endif /* _ASM_MMZONE_H_ */