1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * This file contains NUMA specific prototypes and definitions.
7 *
8 * 2002/08/05 Erich Focht <efocht@ess.nec.de>
9 *
10 */
11#ifndef _ASM_IA64_NUMA_H
12#define _ASM_IA64_NUMA_H
13
14
15#ifdef CONFIG_NUMA
16
17#include <linux/cache.h>
18#include <linux/cpumask.h>
19#include <linux/numa.h>
20#include <linux/smp.h>
21#include <linux/threads.h>
22
23#include <asm/mmzone.h>
24
25extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
26extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
27extern pg_data_t *pgdat_list[MAX_NUMNODES];
28
29/* Stuff below this line could be architecture independent */
30
31extern int num_node_memblks;		/* total number of memory chunks */
32
33/*
34 * List of node memory chunks. Filled when parsing SRAT table to
35 * obtain information about memory nodes.
36*/
37
38struct node_memblk_s {
39	unsigned long start_paddr;
40	unsigned long size;
41	int nid;		/* which logical node contains this chunk? */
42	int bank;		/* which mem bank on this node */
43};
44
45struct node_cpuid_s {
46	u16	phys_id;	/* id << 8 | eid */
47	int	nid;		/* logical node containing this CPU */
48};
49
50extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
51extern struct node_cpuid_s node_cpuid[NR_CPUS];
52
53/*
54 * ACPI 2.0 SLIT (System Locality Information Table)
55 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
56 *
57 * This is a matrix with "distances" between nodes, they should be
58 * proportional to the memory access latency ratios.
59 */
60
61extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
62#define node_distance(from,to) (numa_slit[(from) * MAX_NUMNODES + (to)])
63
64extern int paddr_to_nid(unsigned long paddr);
65
66#define local_nodeid (cpu_to_node_map[smp_processor_id()])
67
68extern void map_cpu_to_node(int cpu, int nid);
69extern void unmap_cpu_from_node(int cpu, int nid);
70extern void numa_clear_node(int cpu);
71
72#else /* !CONFIG_NUMA */
73#define map_cpu_to_node(cpu, nid)	do{}while(0)
74#define unmap_cpu_from_node(cpu, nid)	do{}while(0)
75#define paddr_to_nid(addr)	0
76#define numa_clear_node(cpu)	do { } while (0)
77#endif /* CONFIG_NUMA */
78
79#endif /* _ASM_IA64_NUMA_H */
80