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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
12union asce {
13 unsigned long val;
14 struct {
15 unsigned long rsto: 52;/* Region- or Segment-Table Origin */
16 unsigned long : 2;
17 unsigned long g : 1; /* Subspace Group control */
18 unsigned long p : 1; /* Private Space control */
19 unsigned long s : 1; /* Storage-Alteration-Event control */
20 unsigned long x : 1; /* Space-Switch-Event control */
21 unsigned long r : 1; /* Real-Space control */
22 unsigned long : 1;
23 unsigned long dt : 2; /* Designation-Type control */
24 unsigned long tl : 2; /* Region- or Segment-Table Length */
25 };
26};
27
28enum {
29 ASCE_TYPE_SEGMENT = 0,
30 ASCE_TYPE_REGION3 = 1,
31 ASCE_TYPE_REGION2 = 2,
32 ASCE_TYPE_REGION1 = 3
33};
34
35union region1_table_entry {
36 unsigned long val;
37 struct {
38 unsigned long rto: 52;/* Region-Table Origin */
39 unsigned long : 2;
40 unsigned long p : 1; /* DAT-Protection Bit */
41 unsigned long : 1;
42 unsigned long tf : 2; /* Region-Second-Table Offset */
43 unsigned long i : 1; /* Region-Invalid Bit */
44 unsigned long : 1;
45 unsigned long tt : 2; /* Table-Type Bits */
46 unsigned long tl : 2; /* Region-Second-Table Length */
47 };
48};
49
50union region2_table_entry {
51 unsigned long val;
52 struct {
53 unsigned long rto: 52;/* Region-Table Origin */
54 unsigned long : 2;
55 unsigned long p : 1; /* DAT-Protection Bit */
56 unsigned long : 1;
57 unsigned long tf : 2; /* Region-Third-Table Offset */
58 unsigned long i : 1; /* Region-Invalid Bit */
59 unsigned long : 1;
60 unsigned long tt : 2; /* Table-Type Bits */
61 unsigned long tl : 2; /* Region-Third-Table Length */
62 };
63};
64
65struct region3_table_entry_fc0 {
66 unsigned long sto: 52;/* Segment-Table Origin */
67 unsigned long : 1;
68 unsigned long fc : 1; /* Format-Control */
69 unsigned long p : 1; /* DAT-Protection Bit */
70 unsigned long : 1;
71 unsigned long tf : 2; /* Segment-Table Offset */
72 unsigned long i : 1; /* Region-Invalid Bit */
73 unsigned long cr : 1; /* Common-Region Bit */
74 unsigned long tt : 2; /* Table-Type Bits */
75 unsigned long tl : 2; /* Segment-Table Length */
76};
77
78struct region3_table_entry_fc1 {
79 unsigned long rfaa: 33;/* Region-Frame Absolute Address */
80 unsigned long : 14;
81 unsigned long av : 1; /* ACCF-Validity Control */
82 unsigned long acc : 4; /* Access-Control Bits */
83 unsigned long f : 1; /* Fetch-Protection Bit */
84 unsigned long fc : 1; /* Format-Control */
85 unsigned long p : 1; /* DAT-Protection Bit */
86 unsigned long iep : 1; /* Instruction-Execution-Protection */
87 unsigned long : 2;
88 unsigned long i : 1; /* Region-Invalid Bit */
89 unsigned long cr : 1; /* Common-Region Bit */
90 unsigned long tt : 2; /* Table-Type Bits */
91 unsigned long : 2;
92};
93
94union region3_table_entry {
95 unsigned long val;
96 struct region3_table_entry_fc0 fc0;
97 struct region3_table_entry_fc1 fc1;
98 struct {
99 unsigned long : 53;
100 unsigned long fc: 1; /* Format-Control */
101 unsigned long : 4;
102 unsigned long i : 1; /* Region-Invalid Bit */
103 unsigned long cr: 1; /* Common-Region Bit */
104 unsigned long tt: 2; /* Table-Type Bits */
105 unsigned long : 2;
106 };
107};
108
109struct segment_table_entry_fc0 {
110 unsigned long pto: 53;/* Page-Table Origin */
111 unsigned long fc : 1; /* Format-Control */
112 unsigned long p : 1; /* DAT-Protection Bit */
113 unsigned long : 3;
114 unsigned long i : 1; /* Segment-Invalid Bit */
115 unsigned long cs : 1; /* Common-Segment Bit */
116 unsigned long tt : 2; /* Table-Type Bits */
117 unsigned long : 2;
118};
119
120struct segment_table_entry_fc1 {
121 unsigned long sfaa: 44;/* Segment-Frame Absolute Address */
122 unsigned long : 3;
123 unsigned long av : 1; /* ACCF-Validity Control */
124 unsigned long acc : 4; /* Access-Control Bits */
125 unsigned long f : 1; /* Fetch-Protection Bit */
126 unsigned long fc : 1; /* Format-Control */
127 unsigned long p : 1; /* DAT-Protection Bit */
128 unsigned long iep : 1; /* Instruction-Execution-Protection */
129 unsigned long : 2;
130 unsigned long i : 1; /* Segment-Invalid Bit */
131 unsigned long cs : 1; /* Common-Segment Bit */
132 unsigned long tt : 2; /* Table-Type Bits */
133 unsigned long : 2;
134};
135
136union segment_table_entry {
137 unsigned long val;
138 struct segment_table_entry_fc0 fc0;
139 struct segment_table_entry_fc1 fc1;
140 struct {
141 unsigned long : 53;
142 unsigned long fc: 1; /* Format-Control */
143 unsigned long : 4;
144 unsigned long i : 1; /* Segment-Invalid Bit */
145 unsigned long cs: 1; /* Common-Segment Bit */
146 unsigned long tt: 2; /* Table-Type Bits */
147 unsigned long : 2;
148 };
149};
150
151union page_table_entry {
152 unsigned long val;
153 struct {
154 unsigned long pfra: 52;/* Page-Frame Real Address */
155 unsigned long z : 1; /* Zero Bit */
156 unsigned long i : 1; /* Page-Invalid Bit */
157 unsigned long p : 1; /* DAT-Protection Bit */
158 unsigned long iep : 1; /* Instruction-Execution-Protection */
159 unsigned long : 8;
160 };
161};
162
163enum {
164 TABLE_TYPE_SEGMENT = 0,
165 TABLE_TYPE_REGION3 = 1,
166 TABLE_TYPE_REGION2 = 2,
167 TABLE_TYPE_REGION1 = 3
168};
169
170#endif /* _S390_DAT_BITS_H */