Linux Kernel  3.7.1
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arch.h
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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  * SGI specific setup.
7  *
8  * Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc.
9  * Copyright (C) 1999 Ralf Baechle ([email protected])
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 
20 typedef 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 
33 extern nasid_t get_nasid(void);
35 extern 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  */
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 
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 */