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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  */
31 struct phys_cpuid {
32 	short			nasid;
33 	char			subnode;
34 	char			slice;
35 };
36 
37 struct 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 
59 typedef 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 
72 DECLARE_PER_CPU(struct nodepda_s *, __sn_nodepda);
73 #define sn_nodepda		__this_cpu_read(__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 */
83