| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | #include <linux/config.h> |
| 15 | |
| 16 | #ifndef SABLE |
| 17 | |
| 18 | #ifndef SN0XXL /* 128 cpu SMP max */ |
| 19 | /* |
| 20 | * This is the maximum number of nodes that can be part of a kernel. |
| 21 | * Effectively, it's the maximum number of compact node ids (cnodeid_t). |
| 22 | */ |
| 23 | #define MAX_COMPACT_NODES 64 |
| 24 | |
| 25 | /* |
| 26 | * MAXCPUS refers to the maximum number of CPUs in a single kernel. |
| 27 | * This is not necessarily the same as MAXNODES * CPUS_PER_NODE |
| 28 | */ |
| 29 | #define MAXCPUS 128 |
| 30 | |
| 31 | #else /* SN0XXL system */ |
| 32 | |
| 33 | #define MAX_COMPACT_NODES 128 |
| 34 | #define MAXCPUS 256 |
| 35 | |
| 36 | #endif /* SN0XXL */ |
| 37 | |
| 38 | /* |
| 39 | * This is the maximum number of NASIDS that can be present in a system. |
| 40 | * (Highest NASID plus one.) |
| 41 | */ |
| 42 | #define MAX_NASIDS 256 |
| 43 | |
| 44 | /* |
| 45 | * MAX_REGIONS refers to the maximum number of hardware partitioned regions. |
| 46 | */ |
| 47 | #define MAX_REGIONS 64 |
| 48 | #define MAX_NONPREMIUM_REGIONS 16 |
| 49 | #define MAX_PREMIUM_REGIONS MAX_REGIONS |
| 50 | |
| 51 | /* |
| 52 | * MAX_PARITIONS refers to the maximum number of logically defined |
| 53 | * partitions the system can support. |
| 54 | */ |
| 55 | #define MAX_PARTITIONS MAX_REGIONS |
| 56 | |
| 57 | |
| 58 | #else |
| 59 | |
| 60 | #define MAX_COMPACT_NODES 4 |
| 61 | #define MAX_NASIDS 4 |
| 62 | #define MAXCPUS 8 |
| 63 | |
| 64 | #endif |
| 65 | |
| 66 | #define NASID_MASK_BYTES ((MAX_NASIDS + 7) / 8) |
| 67 | |
| 68 | /* |
| 69 | * Slot constants for SN0 |
| 70 | */ |
| 71 | #ifdef CONFIG_SGI_SN0_N_MODE |
| 72 | #define MAX_MEM_SLOTS 16 /* max slots per node */ |
| 73 | #else /* !CONFIG_SGI_SN0_N_MODE, assume M_MODE */ |
| 74 | #define MAX_MEM_SLOTS 32 /* max slots per node */ |
| 75 | #endif /* defined(N_MODE) */ |
| 76 | |
| 77 | #if SABLE_RTL |
| 78 | #define SLOT_SHIFT (28) |
| 79 | #define SLOT_MIN_MEM_SIZE (16*1024*1024) |
| 80 | #else |
| 81 | #define SLOT_SHIFT (27) |
| 82 | #define SLOT_MIN_MEM_SIZE (32*1024*1024) |
| 83 | #endif |
| 84 | |
| 85 | #define CPUS_PER_NODE 2 /* CPUs on a single hub */ |
| 86 | #define CPUS_PER_NODE_SHFT 1 /* Bits to shift in the node number */ |
| 87 | #define CPUS_PER_SUBNODE 2 /* CPUs on a single hub PI */ |
| 88 | |
| 89 | #endif /* _ASM_SN_SN0_ARCH_H */ |