Fix node_start/end_pfn() definition for mm/page_cgroup.c
[linux-2.6.git] / arch / alpha / include / asm / mmzone.h
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 <asm/smp.h>
9
10 struct bootmem_data_t; /* stupid forward decl. */
11
12 /*
13  * Following are macros that are specific to this numa platform.
14  */
15
16 extern pg_data_t node_data[];
17
18 #define alpha_pa_to_nid(pa)             \
19         (alpha_mv.pa_to_nid             \
20          ? alpha_mv.pa_to_nid(pa)       \
21          : (0))
22 #define node_mem_start(nid)             \
23         (alpha_mv.node_mem_start        \
24          ? alpha_mv.node_mem_start(nid) \
25          : (0UL))
26 #define node_mem_size(nid)              \
27         (alpha_mv.node_mem_size         \
28          ? alpha_mv.node_mem_size(nid)  \
29          : ((nid) ? (0UL) : (~0UL)))
30
31 #define pa_to_nid(pa)           alpha_pa_to_nid(pa)
32 #define NODE_DATA(nid)          (&node_data[(nid)])
33
34 #define node_localnr(pfn, nid)  ((pfn) - NODE_DATA(nid)->node_start_pfn)
35
36 #if 1
37 #define PLAT_NODE_DATA_LOCALNR(p, n)    \
38         (((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
39 #else
40 static inline unsigned long
41 PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
42 {
43         unsigned long temp;
44         temp = p >> PAGE_SHIFT;
45         return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
46 }
47 #endif
48
49 #ifdef CONFIG_DISCONTIGMEM
50
51 /*
52  * Following are macros that each numa implementation must define.
53  */
54
55 /*
56  * Given a kernel address, find the home node of the underlying memory.
57  */
58 #define kvaddr_to_nid(kaddr)    pa_to_nid(__pa(kaddr))
59
60 /*
61  * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
62  * and returns the kaddr corresponding to first physical page in the
63  * node's mem_map.
64  */
65 #define LOCAL_BASE_ADDR(kaddr)                                            \
66     ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn  \
67                          << PAGE_SHIFT))
68
69 /* XXX: FIXME -- wli */
70 #define kern_addr_valid(kaddr)  (0)
71
72 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
73
74 #define VALID_PAGE(page)        (((page) - mem_map) < max_mapnr)
75
76 #define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> 32))
77 #define pgd_page(pgd)           (pfn_to_page(pgd_val(pgd) >> 32))
78 #define pte_pfn(pte)            (pte_val(pte) >> 32)
79
80 #define mk_pte(page, pgprot)                                                 \
81 ({                                                                           \
82         pte_t pte;                                                           \
83         unsigned long pfn;                                                   \
84                                                                              \
85         pfn = page_to_pfn(page) << 32; \
86         pte_val(pte) = pfn | pgprot_val(pgprot);                             \
87                                                                              \
88         pte;                                                                 \
89 })
90
91 #define pte_page(x)                                                     \
92 ({                                                                      \
93         unsigned long kvirt;                                            \
94         struct page * __xx;                                             \
95                                                                         \
96         kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));     \
97         __xx = virt_to_page(kvirt);                                     \
98                                                                         \
99         __xx;                                                           \
100 })
101
102 #define page_to_pa(page)                                                \
103         (page_to_pfn(page) << PAGE_SHIFT)
104
105 #define pfn_to_nid(pfn)         pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
106 #define pfn_valid(pfn)                                                  \
107         (((pfn) - node_start_pfn(pfn_to_nid(pfn))) <                    \
108          node_spanned_pages(pfn_to_nid(pfn)))                                   \
109
110 #define virt_addr_valid(kaddr)  pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
111
112 #endif /* CONFIG_DISCONTIGMEM */
113
114 #endif /* _ASM_MMZONE_H_ */