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 * SGI specific setup.
7 *
8 * Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc.
9 * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
10 */
11#ifndef _ASM_SN_ARCH_H
12#define _ASM_SN_ARCH_H
13
14#include <linux/types.h>
15#include <asm/sn/types.h>
16#ifdef CONFIG_SGI_IP27
17#include <asm/sn/sn0/arch.h>
18#endif
19
20typedef u64	hubreg_t;
21
22#define cputonasid(cpu)		(sn_cpu_info[(cpu)].p_nasid)
23#define cputoslice(cpu)		(sn_cpu_info[(cpu)].p_slice)
24#define makespnum(_nasid, _slice)					\
25		(((_nasid) << CPUS_PER_NODE_SHFT) | (_slice))
26
27#define INVALID_NASID		(nasid_t)-1
28#define INVALID_CNODEID		(cnodeid_t)-1
29#define INVALID_PNODEID		(pnodeid_t)-1
30#define INVALID_MODULE		(moduleid_t)-1
31#define	INVALID_PARTID		(partid_t)-1
32
33extern nasid_t get_nasid(void);
34extern cnodeid_t get_cpu_cnode(cpuid_t);
35extern int get_cpu_slice(cpuid_t);
36
37/*
38 * NO ONE should access these arrays directly.  The only reason we refer to
39 * them here is to avoid the procedure call that would be required in the
40 * macros below.  (Really want private data members here :-)
41 */
42extern cnodeid_t nasid_to_compact_node[MAX_NASIDS];
43extern nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
44
45/*
46 * These macros are used by various parts of the kernel to convert
47 * between the three different kinds of node numbering.   At least some
48 * of them may change to procedure calls in the future, but the macros
49 * will continue to work.  Don't use the arrays above directly.
50 */
51
52#define	NASID_TO_REGION(nnode)	      	\
53    ((nnode) >> \
54     (is_fine_dirmode() ? NASID_TO_FINEREG_SHFT : NASID_TO_COARSEREG_SHFT))
55
56extern cnodeid_t nasid_to_compact_node[MAX_NASIDS];
57extern nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
58extern cnodeid_t cpuid_to_compact_node[MAXCPUS];
59
60#define NASID_TO_COMPACT_NODEID(nnode)	(nasid_to_compact_node[nnode])
61#define COMPACT_TO_NASID_NODEID(cnode)	(compact_to_nasid_node[cnode])
62#define CPUID_TO_COMPACT_NODEID(cpu)	(cpuid_to_compact_node[(cpu)])
63
64#endif /* _ASM_SN_ARCH_H */
65