1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * DAT table and related structures 4 * 5 * Copyright IBM Corp. 2024 6 * 7 */ 8 9 #ifndef _S390_DAT_BITS_H 10 #define _S390_DAT_BITS_H 11 12 /* 13 * vaddress union in order to easily decode a virtual address into its 14 * region first index, region second index etc. parts. 15 */ 16 union vaddress { 17 unsigned long addr; 18 struct { 19 unsigned long rfx : 11; 20 unsigned long rsx : 11; 21 unsigned long rtx : 11; 22 unsigned long sx : 11; 23 unsigned long px : 8; 24 unsigned long bx : 12; 25 }; 26 struct { 27 unsigned long rfx01 : 2; 28 unsigned long : 9; 29 unsigned long rsx01 : 2; 30 unsigned long : 9; 31 unsigned long rtx01 : 2; 32 unsigned long : 9; 33 unsigned long sx01 : 2; 34 unsigned long : 29; 35 }; 36 }; 37 38 union asce { 39 unsigned long val; 40 struct { 41 unsigned long rsto: 52;/* Region- or Segment-Table Origin */ 42 unsigned long : 2; 43 unsigned long g : 1; /* Subspace Group control */ 44 unsigned long p : 1; /* Private Space control */ 45 unsigned long s : 1; /* Storage-Alteration-Event control */ 46 unsigned long x : 1; /* Space-Switch-Event control */ 47 unsigned long r : 1; /* Real-Space control */ 48 unsigned long : 1; 49 unsigned long dt : 2; /* Designation-Type control */ 50 unsigned long tl : 2; /* Region- or Segment-Table Length */ 51 }; 52 }; 53 54 enum { 55 ASCE_TYPE_SEGMENT = 0, 56 ASCE_TYPE_REGION3 = 1, 57 ASCE_TYPE_REGION2 = 2, 58 ASCE_TYPE_REGION1 = 3 59 }; 60 61 union region1_table_entry { 62 unsigned long val; 63 struct { 64 unsigned long rto: 52;/* Region-Table Origin */ 65 unsigned long : 2; 66 unsigned long p : 1; /* DAT-Protection Bit */ 67 unsigned long : 1; 68 unsigned long tf : 2; /* Region-Second-Table Offset */ 69 unsigned long i : 1; /* Region-Invalid Bit */ 70 unsigned long : 1; 71 unsigned long tt : 2; /* Table-Type Bits */ 72 unsigned long tl : 2; /* Region-Second-Table Length */ 73 }; 74 }; 75 76 union region2_table_entry { 77 unsigned long val; 78 struct { 79 unsigned long rto: 52;/* Region-Table Origin */ 80 unsigned long : 2; 81 unsigned long p : 1; /* DAT-Protection Bit */ 82 unsigned long : 1; 83 unsigned long tf : 2; /* Region-Third-Table Offset */ 84 unsigned long i : 1; /* Region-Invalid Bit */ 85 unsigned long : 1; 86 unsigned long tt : 2; /* Table-Type Bits */ 87 unsigned long tl : 2; /* Region-Third-Table Length */ 88 }; 89 }; 90 91 struct region3_table_entry_fc0 { 92 unsigned long sto: 52;/* Segment-Table Origin */ 93 unsigned long : 1; 94 unsigned long fc : 1; /* Format-Control */ 95 unsigned long p : 1; /* DAT-Protection Bit */ 96 unsigned long : 1; 97 unsigned long tf : 2; /* Segment-Table Offset */ 98 unsigned long i : 1; /* Region-Invalid Bit */ 99 unsigned long cr : 1; /* Common-Region Bit */ 100 unsigned long tt : 2; /* Table-Type Bits */ 101 unsigned long tl : 2; /* Segment-Table Length */ 102 }; 103 104 struct region3_table_entry_fc1 { 105 unsigned long rfaa: 33;/* Region-Frame Absolute Address */ 106 unsigned long : 14; 107 unsigned long av : 1; /* ACCF-Validity Control */ 108 unsigned long acc : 4; /* Access-Control Bits */ 109 unsigned long f : 1; /* Fetch-Protection Bit */ 110 unsigned long fc : 1; /* Format-Control */ 111 unsigned long p : 1; /* DAT-Protection Bit */ 112 unsigned long iep : 1; /* Instruction-Execution-Protection */ 113 unsigned long : 2; 114 unsigned long i : 1; /* Region-Invalid Bit */ 115 unsigned long cr : 1; /* Common-Region Bit */ 116 unsigned long tt : 2; /* Table-Type Bits */ 117 unsigned long : 2; 118 }; 119 120 union region3_table_entry { 121 unsigned long val; 122 struct region3_table_entry_fc0 fc0; 123 struct region3_table_entry_fc1 fc1; 124 struct { 125 unsigned long : 53; 126 unsigned long fc: 1; /* Format-Control */ 127 unsigned long p : 1; /* DAT-Protection Bit */ 128 unsigned long : 3; 129 unsigned long i : 1; /* Region-Invalid Bit */ 130 unsigned long cr: 1; /* Common-Region Bit */ 131 unsigned long tt: 2; /* Table-Type Bits */ 132 unsigned long : 2; 133 }; 134 }; 135 136 struct segment_table_entry_fc0 { 137 unsigned long pto: 53;/* Page-Table Origin */ 138 unsigned long fc : 1; /* Format-Control */ 139 unsigned long p : 1; /* DAT-Protection Bit */ 140 unsigned long : 3; 141 unsigned long i : 1; /* Segment-Invalid Bit */ 142 unsigned long cs : 1; /* Common-Segment Bit */ 143 unsigned long tt : 2; /* Table-Type Bits */ 144 unsigned long : 2; 145 }; 146 147 struct segment_table_entry_fc1 { 148 unsigned long sfaa: 44;/* Segment-Frame Absolute Address */ 149 unsigned long : 3; 150 unsigned long av : 1; /* ACCF-Validity Control */ 151 unsigned long acc : 4; /* Access-Control Bits */ 152 unsigned long f : 1; /* Fetch-Protection Bit */ 153 unsigned long fc : 1; /* Format-Control */ 154 unsigned long p : 1; /* DAT-Protection Bit */ 155 unsigned long iep : 1; /* Instruction-Execution-Protection */ 156 unsigned long : 2; 157 unsigned long i : 1; /* Segment-Invalid Bit */ 158 unsigned long cs : 1; /* Common-Segment Bit */ 159 unsigned long tt : 2; /* Table-Type Bits */ 160 unsigned long : 2; 161 }; 162 163 union segment_table_entry { 164 unsigned long val; 165 struct segment_table_entry_fc0 fc0; 166 struct segment_table_entry_fc1 fc1; 167 struct { 168 unsigned long : 53; 169 unsigned long fc: 1; /* Format-Control */ 170 unsigned long p : 1; /* DAT-Protection Bit */ 171 unsigned long : 3; 172 unsigned long i : 1; /* Segment-Invalid Bit */ 173 unsigned long cs: 1; /* Common-Segment Bit */ 174 unsigned long tt: 2; /* Table-Type Bits */ 175 unsigned long : 2; 176 }; 177 }; 178 179 union page_table_entry { 180 unsigned long val; 181 struct { 182 unsigned long pfra: 52;/* Page-Frame Real Address */ 183 unsigned long z : 1; /* Zero Bit */ 184 unsigned long i : 1; /* Page-Invalid Bit */ 185 unsigned long p : 1; /* DAT-Protection Bit */ 186 unsigned long iep : 1; /* Instruction-Execution-Protection */ 187 unsigned long : 8; 188 }; 189 }; 190 191 enum { 192 TABLE_TYPE_SEGMENT = 0, 193 TABLE_TYPE_REGION3 = 1, 194 TABLE_TYPE_REGION2 = 2, 195 TABLE_TYPE_REGION1 = 3 196 }; 197 198 #endif /* _S390_DAT_BITS_H */ 199