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
10struct bootmem_data_t; /* stupid forward decl. */
11
12/*
13 * Following are macros that are specific to this numa platform.
14 */
15
16extern 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
40static inline unsigned long
41PLAT_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_ */
115