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