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#ifdef CONFIG_NUMA_SCHED
10#include <linux/numa_sched.h>
11#endif
12#ifdef NOTYET
13#include <asm/sn/types.h>
14#include <asm/sn/addrs.h>
15#include <asm/sn/arch.h>
16#include <asm/sn/klkernvars.h>
17#endif /* NOTYET */
18
19typedef struct plat_pglist_data {
20	pg_data_t	gendata;
21#ifdef NOTYET
22	kern_vars_t	kern_vars;
23#endif
24#if defined(CONFIG_NUMA) && defined(CONFIG_NUMA_SCHED)
25	struct numa_schedule_data schedule_data;
26#endif
27} plat_pg_data_t;
28
29struct bootmem_data_t; /* stupid forward decl. */
30
31/*
32 * Following are macros that are specific to this numa platform.
33 */
34
35extern plat_pg_data_t *plat_node_data[];
36
37#ifdef CONFIG_ALPHA_WILDFIRE
38# define ALPHA_PA_TO_NID(pa)	((pa) >> 36)	/* 16 nodes max due 43bit kseg */
39#define NODE_MAX_MEM_SIZE	(64L * 1024L * 1024L * 1024L) /* 64 GB */
40#define MAX_NUMNODES		WILDFIRE_MAX_QBB
41#else
42# define ALPHA_PA_TO_NID(pa)	(0)
43#define NODE_MAX_MEM_SIZE	(~0UL)
44#define MAX_NUMNODES		1
45#endif
46
47#define PHYSADDR_TO_NID(pa)		ALPHA_PA_TO_NID(pa)
48#define PLAT_NODE_DATA(n)		(plat_node_data[(n)])
49#define PLAT_NODE_DATA_STARTNR(n)	\
50	(PLAT_NODE_DATA(n)->gendata.node_start_mapnr)
51#define PLAT_NODE_DATA_SIZE(n)		(PLAT_NODE_DATA(n)->gendata.node_size)
52
53#define PLAT_NODE_DATA_LOCALNR(p, n)	\
54	(((p) - PLAT_NODE_DATA(n)->gendata.node_start_paddr) >> PAGE_SHIFT)
55
56#ifdef CONFIG_DISCONTIGMEM
57
58/*
59 * Following are macros that each numa implmentation must define.
60 */
61
62/*
63 * Given a kernel address, find the home node of the underlying memory.
64 */
65#define KVADDR_TO_NID(kaddr)	PHYSADDR_TO_NID(__pa(kaddr))
66
67/*
68 * Return a pointer to the node data for node n.
69 */
70#define NODE_DATA(n)	(&((PLAT_NODE_DATA(n))->gendata))
71
72/*
73 * NODE_MEM_MAP gives the kaddr for the mem_map of the node.
74 */
75#define NODE_MEM_MAP(nid)	(NODE_DATA(nid)->node_mem_map)
76
77/*
78 * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
79 * and returns the the mem_map of that node.
80 */
81#define ADDR_TO_MAPBASE(kaddr) \
82			NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr)))
83
84/*
85 * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
86 * and returns the kaddr corresponding to first physical page in the
87 * node's mem_map.
88 */
89#define LOCAL_BASE_ADDR(kaddr)	((unsigned long)__va(NODE_DATA(KVADDR_TO_NID(kaddr))->node_start_paddr))
90
91#define LOCAL_MAP_NR(kvaddr) \
92	(((unsigned long)(kvaddr)-LOCAL_BASE_ADDR(kvaddr)) >> PAGE_SHIFT)
93
94#define kern_addr_valid(kaddr)	test_bit(LOCAL_MAP_NR(kaddr), \
95					 NODE_DATA(KVADDR_TO_NID(kaddr))->valid_addr_bitmap)
96
97#define virt_to_page(kaddr)	(ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr))
98#define VALID_PAGE(page)	(((page) - mem_map) < max_mapnr)
99
100#ifdef CONFIG_NUMA
101#ifdef CONFIG_NUMA_SCHED
102#define NODE_SCHEDULE_DATA(nid)	(&((PLAT_NODE_DATA(nid))->schedule_data))
103#endif
104
105#ifdef CONFIG_ALPHA_WILDFIRE
106/* With wildfire assume 4 CPUs per node */
107#define cputonode(cpu)	((cpu) >> 2)
108#else
109#define cputonode(cpu)	0
110#endif /* CONFIG_ALPHA_WILDFIRE */
111
112#define numa_node_id()	cputonode(smp_processor_id())
113#endif /* CONFIG_NUMA */
114
115#endif /* CONFIG_DISCONTIGMEM */
116
117#endif /* _ASM_MMZONE_H_ */
118