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1da177e4 LT |
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 | ||
11 | struct bootmem_data_t; /* stupid forward decl. */ | |
12 | ||
13 | /* | |
14 | * Following are macros that are specific to this numa platform. | |
15 | */ | |
16 | ||
17 | extern 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 | |
41 | static inline unsigned long | |
42 | PLAT_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)) | |
1da177e4 LT |
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); \ | |
408fde81 | 110 | (NODE_DATA(kvaddr_to_nid(kaddr))->node_mem_map + local_mapnr(kaddr)); \ |
1da177e4 LT |
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_ */ |