1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* QEMU Macintosh Nubus
*
* Copyright (c) 2013-2018 Laurent Vivier <laurent@vivier.eu>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "hw/nubus/nubus.h"
#include "qapi/error.h"
/* The Format Block Structure */
#define FBLOCK_DIRECTORY_OFFSET 0
#define FBLOCK_LENGTH 4
#define FBLOCK_CRC 8
#define FBLOCK_REVISION_LEVEL 12
#define FBLOCK_FORMAT 13
#define FBLOCK_TEST_PATTERN 14
#define FBLOCK_RESERVED 18
#define FBLOCK_BYTE_LANES 19
#define FBLOCK_SIZE 20
#define FBLOCK_PATTERN_VAL 0x5a932bc7
static uint64_t nubus_fblock_read(void *opaque, hwaddr addr, unsigned int size)
{
NubusDevice *dev = opaque;
uint64_t val;
#define BYTE(v, b) (((v) >> (24 - 8 * (b))) & 0xff)
switch (addr) {
case FBLOCK_BYTE_LANES:
val = dev->byte_lanes;
val |= (val ^ 0xf) << 4;
break;
case FBLOCK_RESERVED:
val = 0x00;
break;
case FBLOCK_TEST_PATTERN...FBLOCK_TEST_PATTERN + 3:
val = BYTE(FBLOCK_PATTERN_VAL, addr - FBLOCK_TEST_PATTERN);
break;
case FBLOCK_FORMAT:
val = dev->rom_format;
break;
case FBLOCK_REVISION_LEVEL:
val = dev->rom_rev;
break;
case FBLOCK_CRC...FBLOCK_CRC + 3:
val = BYTE(dev->rom_crc, addr - FBLOCK_CRC);
break;
case FBLOCK_LENGTH...FBLOCK_LENGTH + 3:
val = BYTE(dev->rom_length, addr - FBLOCK_LENGTH);
break;
case FBLOCK_DIRECTORY_OFFSET...FBLOCK_DIRECTORY_OFFSET + 3:
val = BYTE(dev->directory_offset, addr - FBLOCK_DIRECTORY_OFFSET);
break;
default:
val = 0;
break;
}
return val;
}
static void nubus_fblock_write(void *opaque, hwaddr addr, uint64_t val,
unsigned int size)
{
/* read only */
}
static const MemoryRegionOps nubus_format_block_ops = {
.read = nubus_fblock_read,
.write = nubus_fblock_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 1,
}
};
static void nubus_register_format_block(NubusDevice *dev)
{
char *fblock_name;
fblock_name = g_strdup_printf("nubus-slot-%d-format-block",
dev->slot);
hwaddr fblock_offset = memory_region_size(&dev->slot_mem) - FBLOCK_SIZE;
memory_region_init_io(&dev->fblock_io, NULL, &nubus_format_block_ops,
dev, fblock_name, FBLOCK_SIZE);
memory_region_add_subregion(&dev->slot_mem, fblock_offset,
&dev->fblock_io);
g_free(fblock_name);
}
static void mac_nubus_rom_write(void *opaque, hwaddr addr, uint64_t val,
unsigned int size)
{
/* read only */
}
static uint64_t mac_nubus_rom_read(void *opaque, hwaddr addr,
unsigned int size)
{
NubusDevice *dev = opaque;
return dev->rom[addr];
}
static const MemoryRegionOps mac_nubus_rom_ops = {
.read = mac_nubus_rom_read,
.write = mac_nubus_rom_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 1,
},
};
void nubus_register_rom(NubusDevice *dev, const uint8_t *rom, uint32_t size,
int revision, int format, uint8_t byte_lanes)
{
hwaddr rom_offset;
char *rom_name;
/* FIXME : really compute CRC */
dev->rom_length = 0;
dev->rom_crc = 0;
dev->rom_rev = revision;
dev->rom_format = format;
dev->byte_lanes = byte_lanes;
dev->directory_offset = -size;
/* ROM */
dev->rom = rom;
rom_name = g_strdup_printf("nubus-slot-%d-rom", dev->slot);
memory_region_init_io(&dev->rom_io, NULL, &mac_nubus_rom_ops,
dev, rom_name, size);
memory_region_set_readonly(&dev->rom_io, true);
rom_offset = memory_region_size(&dev->slot_mem) - FBLOCK_SIZE +
dev->directory_offset;
memory_region_add_subregion(&dev->slot_mem, rom_offset, &dev->rom_io);
g_free(rom_name);
}
static void nubus_device_realize(DeviceState *dev, Error **errp)
{
NubusBus *nubus = NUBUS_BUS(qdev_get_parent_bus(dev));
NubusDevice *nd = NUBUS_DEVICE(dev);
char *name;
hwaddr slot_offset;
/* Super */
slot_offset = nd->slot * NUBUS_SUPER_SLOT_SIZE;
name = g_strdup_printf("nubus-super-slot-%x", nd->slot);
memory_region_init(&nd->super_slot_mem, OBJECT(dev), name,
NUBUS_SUPER_SLOT_SIZE);
memory_region_add_subregion(&nubus->super_slot_io, slot_offset,
&nd->super_slot_mem);
g_free(name);
/* Normal */
slot_offset = nd->slot * NUBUS_SLOT_SIZE;
name = g_strdup_printf("nubus-slot-%x", nd->slot);
memory_region_init(&nd->slot_mem, OBJECT(dev), name, NUBUS_SLOT_SIZE);
memory_region_add_subregion(&nubus->slot_io, slot_offset,
&nd->slot_mem);
g_free(name);
nubus_register_format_block(nd);
}
static Property nubus_device_properties[] = {
DEFINE_PROP_INT32("slot", NubusDevice, slot, -1),
DEFINE_PROP_END_OF_LIST()
};
static void nubus_device_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->realize = nubus_device_realize;
dc->bus_type = TYPE_NUBUS_BUS;
device_class_set_props(dc, nubus_device_properties);
}
static const TypeInfo nubus_device_type_info = {
.name = TYPE_NUBUS_DEVICE,
.parent = TYPE_DEVICE,
.abstract = true,
.instance_size = sizeof(NubusDevice),
.class_init = nubus_device_class_init,
};
static void nubus_register_types(void)
{
type_register_static(&nubus_device_type_info);
}
type_init(nubus_register_types)
|
