1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * This is the official version 1.1 of sdb.h
4 */
5 #ifndef __SDB_H__
6 #define __SDB_H__
7 #ifdef __KERNEL__
8 #include <linux/types.h>
9 #else
10 #include <stdint.h>
11 #endif
12
13 /*
14 * All structures are 64 bytes long and are expected
15 * to live in an array, one for each interconnect.
16 * Most fields of the structures are shared among the
17 * various types, and most-specific fields are at the
18 * beginning (for alignment reasons, and to keep the
19 * magic number at the head of the interconnect record
20 */
21
22 /* Product, 40 bytes at offset 24, 8-byte aligned
23 *
24 * device_id is vendor-assigned; version is device-specific,
25 * date is hex (e.g 0x20120501), name is UTF-8, blank-filled
26 * and not terminated with a 0 byte.
27 */
28 struct sdb_product {
29 uint64_t vendor_id; /* 0x18..0x1f */
30 uint32_t device_id; /* 0x20..0x23 */
31 uint32_t version; /* 0x24..0x27 */
32 uint32_t date; /* 0x28..0x2b */
33 uint8_t name[19]; /* 0x2c..0x3e */
34 uint8_t record_type; /* 0x3f */
35 };
36
37 /*
38 * Component, 56 bytes at offset 8, 8-byte aligned
39 *
40 * The address range is first to last, inclusive
41 * (for example 0x100000 - 0x10ffff)
42 */
43 struct sdb_component {
44 uint64_t addr_first; /* 0x08..0x0f */
45 uint64_t addr_last; /* 0x10..0x17 */
46 struct sdb_product product; /* 0x18..0x3f */
47 };
48
49 /* Type of the SDB record */
50 enum sdb_record_type {
51 sdb_type_interconnect = 0x00,
52 sdb_type_device = 0x01,
53 sdb_type_bridge = 0x02,
54 sdb_type_integration = 0x80,
55 sdb_type_repo_url = 0x81,
56 sdb_type_synthesis = 0x82,
57 sdb_type_empty = 0xFF,
58 };
59
60 /* Type 0: interconnect (first of the array)
61 *
62 * sdb_records is the length of the table including this first
63 * record, version is 1. The bus type is enumerated later.
64 */
65 #define SDB_MAGIC 0x5344422d /* "SDB-" */
66 struct sdb_interconnect {
67 uint32_t sdb_magic; /* 0x00-0x03 */
68 uint16_t sdb_records; /* 0x04-0x05 */
69 uint8_t sdb_version; /* 0x06 */
70 uint8_t sdb_bus_type; /* 0x07 */
71 struct sdb_component sdb_component; /* 0x08-0x3f */
72 };
73
74 /* Type 1: device
75 *
76 * class is 0 for "custom device", other values are
77 * to be standardized; ABI version is for the driver,
78 * bus-specific bits are defined by each bus (see below)
79 */
80 struct sdb_device {
81 uint16_t abi_class; /* 0x00-0x01 */
82 uint8_t abi_ver_major; /* 0x02 */
83 uint8_t abi_ver_minor; /* 0x03 */
84 uint32_t bus_specific; /* 0x04-0x07 */
85 struct sdb_component sdb_component; /* 0x08-0x3f */
86 };
87
88 /* Type 2: bridge
89 *
90 * child is the address of the nested SDB table
91 */
92 struct sdb_bridge {
93 uint64_t sdb_child; /* 0x00-0x07 */
94 struct sdb_component sdb_component; /* 0x08-0x3f */
95 };
96
97 /* Type 0x80: integration
98 *
99 * all types with bit 7 set are meta-information, so
100 * software can ignore the types it doesn't know. Here we
101 * just provide product information for an aggregate device
102 */
103 struct sdb_integration {
104 uint8_t reserved[24]; /* 0x00-0x17 */
105 struct sdb_product product; /* 0x08-0x3f */
106 };
107
108 /* Type 0x81: Top module repository url
109 *
110 * again, an informative field that software can ignore
111 */
112 struct sdb_repo_url {
113 uint8_t repo_url[63]; /* 0x00-0x3e */
114 uint8_t record_type; /* 0x3f */
115 };
116
117 /* Type 0x82: Synthesis tool information
118 *
119 * this informative record
120 */
121 struct sdb_synthesis {
122 uint8_t syn_name[16]; /* 0x00-0x0f */
123 uint8_t commit_id[16]; /* 0x10-0x1f */
124 uint8_t tool_name[8]; /* 0x20-0x27 */
125 uint32_t tool_version; /* 0x28-0x2b */
126 uint32_t date; /* 0x2c-0x2f */
127 uint8_t user_name[15]; /* 0x30-0x3e */
128 uint8_t record_type; /* 0x3f */
129 };
130
131 /* Type 0xff: empty
132 *
133 * this allows keeping empty slots during development,
134 * so they can be filled later with minimal efforts and
135 * no misleading description is ever shipped -- hopefully.
136 * It can also be used to pad a table to a desired length.
137 */
138 struct sdb_empty {
139 uint8_t reserved[63]; /* 0x00-0x3e */
140 uint8_t record_type; /* 0x3f */
141 };
142
143 /* The type of bus, for bus-specific flags */
144 enum sdb_bus_type {
145 sdb_wishbone = 0x00,
146 sdb_data = 0x01,
147 };
148
149 #define SDB_WB_WIDTH_MASK 0x0f
150 #define SDB_WB_ACCESS8 0x01
151 #define SDB_WB_ACCESS16 0x02
152 #define SDB_WB_ACCESS32 0x04
153 #define SDB_WB_ACCESS64 0x08
154 #define SDB_WB_LITTLE_ENDIAN 0x80
155
156 #define SDB_DATA_READ 0x04
157 #define SDB_DATA_WRITE 0x02
158 #define SDB_DATA_EXEC 0x01
159
160 #endif /* __SDB_H__ */