xref: /linux/arch/mips/include/asm/sn/sn0/arch.h (revision c95baf12f5077419db01313ab61c2aac007d40cd)
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 IP27 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_SN0_ARCH_H
12 #define _ASM_SN_SN0_ARCH_H
13 
14 
15 /*
16  * MAXCPUS refers to the maximum number of CPUs in a single kernel.
17  * This is not necessarily the same as MAXNODES * CPUS_PER_NODE
18  */
19 #define MAXCPUS			(MAX_NUMNODES * CPUS_PER_NODE)
20 
21 /*
22  * This is the maximum number of NASIDS that can be present in a system.
23  * (Highest NASID plus one.)
24  */
25 #define MAX_NASIDS		256
26 
27 /*
28  * MAX_REGIONS refers to the maximum number of hardware partitioned regions.
29  */
30 #define MAX_REGIONS		64
31 #define MAX_NONPREMIUM_REGIONS	16
32 #define MAX_PREMIUM_REGIONS	MAX_REGIONS
33 
34 /*
35  * MAX_PARITIONS refers to the maximum number of logically defined
36  * partitions the system can support.
37  */
38 #define MAX_PARTITIONS		MAX_REGIONS
39 
40 #define NASID_MASK_BYTES	((MAX_NASIDS + 7) / 8)
41 
42 /*
43  * Slot constants for SN0
44  */
45 #ifdef CONFIG_SGI_SN_N_MODE
46 #define MAX_MEM_SLOTS	16			/* max slots per node */
47 #else /* !CONFIG_SGI_SN_N_MODE, assume CONFIG_SGI_SN_M_MODE */
48 #define MAX_MEM_SLOTS	32			/* max slots per node */
49 #endif /* CONFIG_SGI_SN_M_MODE */
50 
51 #define SLOT_SHIFT		(27)
52 #define SLOT_MIN_MEM_SIZE	(32*1024*1024)
53 
54 #define CPUS_PER_NODE		2	/* CPUs on a single hub */
55 
56 #endif /* _ASM_SN_SN0_ARCH_H */
57