1/*
2 * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
3 */
4#ifndef _ASM_MMZONE_H_
5#define _ASM_MMZONE_H_
6
7#include <linux/config.h>
8#include <asm/sn/types.h>
9#include <asm/sn/addrs.h>
10#include <asm/sn/arch.h>
11#include <asm/sn/klkernvars.h>
12
13typedef struct plat_pglist_data {
14	pg_data_t	gendata;
15	kern_vars_t	kern_vars;
16} plat_pg_data_t;
17
18/*
19 * Following are macros that are specific to this numa platform.
20 */
21
22extern int numa_debug(void);
23extern plat_pg_data_t *plat_node_data[];
24
25#define PHYSADDR_TO_NID(pa)		NASID_TO_COMPACT_NODEID(NASID_GET(pa))
26#define PLAT_NODE_DATA(n)		(plat_node_data[n])
27#define PLAT_NODE_DATA_STARTNR(n)    (PLAT_NODE_DATA(n)->gendata.node_start_mapnr)
28#define PLAT_NODE_DATA_SIZE(n)	     (PLAT_NODE_DATA(n)->gendata.node_size)
29#define PLAT_NODE_DATA_LOCALNR(p, n) \
30		(((p) - PLAT_NODE_DATA(n)->gendata.node_start_paddr) >> PAGE_SHIFT)
31
32#define numa_node_id()	cputocnode(current->processor)
33
34#ifdef CONFIG_DISCONTIGMEM
35
36/*
37 * Following are macros that each numa implmentation must define.
38 */
39
40/*
41 * Given a kernel address, find the home node of the underlying memory.
42 */
43#define KVADDR_TO_NID(kaddr) \
44	((NASID_TO_COMPACT_NODEID(NASID_GET(__pa(kaddr))) != -1) ? \
45	(NASID_TO_COMPACT_NODEID(NASID_GET(__pa(kaddr)))) : \
46	(printk("NUMABUG: %s line %d addr 0x%lx", __FILE__, __LINE__, kaddr), \
47	numa_debug(), -1))
48
49/*
50 * Return a pointer to the node data for node n.
51 */
52#define NODE_DATA(n)	(&((PLAT_NODE_DATA(n))->gendata))
53
54/*
55 * NODE_MEM_MAP gives the kaddr for the mem_map of the node.
56 */
57#define NODE_MEM_MAP(nid)	(NODE_DATA(nid)->node_mem_map)
58
59/*
60 * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
61 * and returns the mem_map of that node.
62 */
63#define ADDR_TO_MAPBASE(kaddr) \
64			NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr)))
65
66/*
67 * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
68 * and returns the kaddr corresponding to first physical page in the
69 * node's mem_map.
70 */
71#define LOCAL_BASE_ADDR(kaddr)	((unsigned long)(kaddr) & ~(NODE_MAX_MEM_SIZE-1))
72
73#define LOCAL_MAP_NR(kvaddr) \
74	(((unsigned long)(kvaddr)-LOCAL_BASE_ADDR((kvaddr))) >> PAGE_SHIFT)
75
76#define MIPS64_NR(kaddr) (((unsigned long)(kaddr) > (unsigned long)high_memory)\
77		? (max_mapnr + 1) : (LOCAL_MAP_NR((kaddr)) + \
78		(((unsigned long)ADDR_TO_MAPBASE((kaddr)) - PAGE_OFFSET) / \
79		sizeof(mem_map_t))))
80
81#define kern_addr_valid(addr)	((KVADDR_TO_NID((unsigned long)addr) > \
82	-1) ? 0 : (test_bit(LOCAL_MAP_NR((addr)), \
83	NODE_DATA(KVADDR_TO_NID((unsigned long)addr))->valid_addr_bitmap)))
84
85#define virt_to_page(kaddr)	(mem_map + MIPS64_NR(kaddr))
86#define VALID_PAGE(page)	((page - mem_map) < max_mapnr)
87
88#endif /* CONFIG_DISCONTIGMEM */
89
90#endif /* _ASM_MMZONE_H_ */
91