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 * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
7 */
8#ifndef _ASM_IA64_SN_NODEPDA_H
9#define _ASM_IA64_SN_NODEPDA_H
10
11
12#include <asm/semaphore.h>
13#include <asm/irq.h>
14#include <asm/sn/arch.h>
15#include <asm/sn/intr.h>
16#include <asm/sn/bte.h>
17
18/*
19 * NUMA Node-Specific Data structures are defined in this file.
20 * In particular, this is the location of the node PDA.
21 * A pointer to the right node PDA is saved in each CPU PDA.
22 */
23
24/*
25 * Node-specific data structure.
26 *
27 * One of these structures is allocated on each node of a NUMA system.
28 *
29 * This structure provides a convenient way of keeping together
30 * all per-node data structures.
31 */
32struct phys_cpuid {
33	short			nasid;
34	char			subnode;
35	char			slice;
36};
37
38struct nodepda_s {
39	void 		*pdinfo;	/* Platform-dependent per-node info */
40
41	/*
42	 * The BTEs on this node are shared by the local cpus
43	 */
44	struct bteinfo_s	bte_if[MAX_BTES_PER_NODE];	/* Virtual Interface */
45	struct timer_list	bte_recovery_timer;
46	spinlock_t		bte_recovery_lock;
47
48	/*
49	 * Array of pointers to the nodepdas for each node.
50	 */
51	struct nodepda_s	*pernode_pdaindr[MAX_COMPACT_NODES];
52
53	/*
54	 * Array of physical cpu identifiers. Indexed by cpuid.
55	 */
56	struct phys_cpuid	phys_cpuid[NR_CPUS];
57	spinlock_t		ptc_lock ____cacheline_aligned_in_smp;
58};
59
60typedef struct nodepda_s nodepda_t;
61
62/*
63 * Access Functions for node PDA.
64 * Since there is one nodepda for each node, we need a convenient mechanism
65 * to access these nodepdas without cluttering code with #ifdefs.
66 * The next set of definitions provides this.
67 * Routines are expected to use
68 *
69 *	sn_nodepda   - to access node PDA for the node on which code is running
70 *	NODEPDA(cnodeid)   - to access node PDA for cnodeid
71 */
72
73DECLARE_PER_CPU(struct nodepda_s *, __sn_nodepda);
74#define sn_nodepda		(__get_cpu_var(__sn_nodepda))
75#define	NODEPDA(cnodeid)	(sn_nodepda->pernode_pdaindr[cnodeid])
76
77/*
78 * Check if given a compact node id the corresponding node has all the
79 * cpus disabled.
80 */
81#define is_headless_node(cnodeid)	(nr_cpus_node(cnodeid) == 0)
82
83#endif /* _ASM_IA64_SN_NODEPDA_H */
84