| 1 | /* |
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| 2 | * This file is subject to the terms and conditions of the GNU General Public |
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| 3 | * License. See the file "COPYING" in the main directory of this archive |
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| 4 | * for more details. |
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| 5 | * |
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| 6 | * SGI IP27 specific setup. |
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| 7 | * |
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| 8 | * Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc. |
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| 9 | * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org) |
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| 10 | */ |
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| 11 | #ifndef _ASM_SN_SN0_ARCH_H |
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| 12 | #define _ASM_SN_SN0_ARCH_H |
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| 13 | |
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| 14 | |
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| 15 | #ifndef SABLE |
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| 16 | |
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| 17 | #ifndef SN0XXL /* 128 cpu SMP max */ |
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| 18 | /* |
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| 19 | * This is the maximum number of nodes that can be part of a kernel. |
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| 20 | * Effectively, it's the maximum number of compact node ids (cnodeid_t). |
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| 21 | */ |
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| 22 | #define MAX_COMPACT_NODES 64 |
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| 23 | |
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| 24 | /* |
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| 25 | * MAXCPUS refers to the maximum number of CPUs in a single kernel. |
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| 26 | * This is not necessarily the same as MAXNODES * CPUS_PER_NODE |
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| 27 | */ |
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| 28 | #define MAXCPUS 128 |
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| 29 | |
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| 30 | #else /* SN0XXL system */ |
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| 31 | |
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| 32 | #define MAX_COMPACT_NODES 128 |
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| 33 | #define MAXCPUS 256 |
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| 34 | |
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| 35 | #endif /* SN0XXL */ |
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| 36 | |
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| 37 | /* |
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| 38 | * This is the maximum number of NASIDS that can be present in a system. |
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| 39 | * (Highest NASID plus one.) |
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| 40 | */ |
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| 41 | #define MAX_NASIDS 256 |
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| 42 | |
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| 43 | /* |
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| 44 | * MAX_REGIONS refers to the maximum number of hardware partitioned regions. |
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| 45 | */ |
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| 46 | #define MAX_REGIONS 64 |
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| 47 | #define MAX_NONPREMIUM_REGIONS 16 |
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| 48 | #define MAX_PREMIUM_REGIONS MAX_REGIONS |
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| 49 | |
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| 50 | /* |
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| 51 | * MAX_PARITIONS refers to the maximum number of logically defined |
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| 52 | * partitions the system can support. |
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| 53 | */ |
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| 54 | #define MAX_PARTITIONS MAX_REGIONS |
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| 55 | |
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| 56 | |
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| 57 | #else |
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| 58 | |
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| 59 | #define MAX_COMPACT_NODES 4 |
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| 60 | #define MAX_NASIDS 4 |
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| 61 | #define MAXCPUS 8 |
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| 62 | |
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| 63 | #endif |
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| 64 | |
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| 65 | #define NASID_MASK_BYTES ((MAX_NASIDS + 7) / 8) |
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| 66 | |
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| 67 | /* |
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| 68 | * Slot constants for SN0 |
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| 69 | */ |
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| 70 | #ifdef CONFIG_SGI_SN0_N_MODE |
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| 71 | #define MAX_MEM_SLOTS 16 /* max slots per node */ |
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| 72 | #else /* !CONFIG_SGI_SN0_N_MODE, assume M_MODE */ |
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| 73 | #define MAX_MEM_SLOTS 32 /* max slots per node */ |
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| 74 | #endif /* defined(N_MODE) */ |
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| 75 | |
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| 76 | #if SABLE_RTL |
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| 77 | #define SLOT_SHIFT (28) |
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| 78 | #define SLOT_MIN_MEM_SIZE (16*1024*1024) |
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| 79 | #else |
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| 80 | #define SLOT_SHIFT (27) |
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| 81 | #define SLOT_MIN_MEM_SIZE (32*1024*1024) |
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| 82 | #endif |
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| 83 | |
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| 84 | #define CPUS_PER_NODE 2 /* CPUs on a single hub */ |
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| 85 | #define CPUS_PER_NODE_SHFT 1 /* Bits to shift in the node number */ |
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| 86 | #define CPUS_PER_SUBNODE 2 /* CPUs on a single hub PI */ |
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| 87 | |
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| 88 | #endif /* _ASM_SN_SN0_ARCH_H */ |
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