linux-user, arm: add syscall table generation support
[qemu.git] / hw / dma / i82374.c
1 /*
2 * QEMU Intel 82374 emulation (Enhanced DMA controller)
3 *
4 * Copyright (c) 2010 Hervé Poussineau
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "qemu/module.h"
28 #include "hw/isa/isa.h"
29 #include "hw/qdev-properties.h"
30 #include "migration/vmstate.h"
31 #include "hw/dma/i8257.h"
32
33 #define TYPE_I82374 "i82374"
34 #define I82374(obj) OBJECT_CHECK(I82374State, (obj), TYPE_I82374)
35
36 //#define DEBUG_I82374
37
38 #ifdef DEBUG_I82374
39 #define DPRINTF(fmt, ...) \
40 do { fprintf(stderr, "i82374: " fmt , ## __VA_ARGS__); } while (0)
41 #else
42 #define DPRINTF(fmt, ...) \
43 do {} while (0)
44 #endif
45 #define BADF(fmt, ...) \
46 do { fprintf(stderr, "i82374 ERROR: " fmt , ## __VA_ARGS__); } while (0)
47
48 typedef struct I82374State {
49 ISADevice parent_obj;
50
51 uint32_t iobase;
52 uint8_t commands[8];
53 PortioList port_list;
54 } I82374State;
55
56 static const VMStateDescription vmstate_i82374 = {
57 .name = "i82374",
58 .version_id = 0,
59 .minimum_version_id = 0,
60 .fields = (VMStateField[]) {
61 VMSTATE_UINT8_ARRAY(commands, I82374State, 8),
62 VMSTATE_END_OF_LIST()
63 },
64 };
65
66 static uint32_t i82374_read_isr(void *opaque, uint32_t nport)
67 {
68 uint32_t val = 0;
69
70 BADF("%s: %08x\n", __func__, nport);
71
72 DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
73 return val;
74 }
75
76 static void i82374_write_command(void *opaque, uint32_t nport, uint32_t data)
77 {
78 DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
79
80 if (data != 0x42) {
81 /* Not Stop S/G command */
82 BADF("%s: %08x=%08x\n", __func__, nport, data);
83 }
84 }
85
86 static uint32_t i82374_read_status(void *opaque, uint32_t nport)
87 {
88 uint32_t val = 0;
89
90 BADF("%s: %08x\n", __func__, nport);
91
92 DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
93 return val;
94 }
95
96 static void i82374_write_descriptor(void *opaque, uint32_t nport, uint32_t data)
97 {
98 DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
99
100 BADF("%s: %08x=%08x\n", __func__, nport, data);
101 }
102
103 static uint32_t i82374_read_descriptor(void *opaque, uint32_t nport)
104 {
105 uint32_t val = 0;
106
107 BADF("%s: %08x\n", __func__, nport);
108
109 DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
110 return val;
111 }
112
113 static const MemoryRegionPortio i82374_portio_list[] = {
114 { 0x0A, 1, 1, .read = i82374_read_isr, },
115 { 0x10, 8, 1, .write = i82374_write_command, },
116 { 0x18, 8, 1, .read = i82374_read_status, },
117 { 0x20, 0x20, 1,
118 .write = i82374_write_descriptor, .read = i82374_read_descriptor, },
119 PORTIO_END_OF_LIST(),
120 };
121
122 static void i82374_realize(DeviceState *dev, Error **errp)
123 {
124 I82374State *s = I82374(dev);
125 ISABus *isa_bus = isa_bus_from_device(ISA_DEVICE(dev));
126
127 if (isa_get_dma(isa_bus, 0)) {
128 error_setg(errp, "DMA already initialized on ISA bus");
129 return;
130 }
131 i8257_dma_init(isa_bus, true);
132
133 portio_list_init(&s->port_list, OBJECT(s), i82374_portio_list, s,
134 "i82374");
135 portio_list_add(&s->port_list, isa_address_space_io(&s->parent_obj),
136 s->iobase);
137
138 memset(s->commands, 0, sizeof(s->commands));
139 }
140
141 static Property i82374_properties[] = {
142 DEFINE_PROP_UINT32("iobase", I82374State, iobase, 0x400),
143 DEFINE_PROP_END_OF_LIST()
144 };
145
146 static void i82374_class_init(ObjectClass *klass, void *data)
147 {
148 DeviceClass *dc = DEVICE_CLASS(klass);
149
150 dc->realize = i82374_realize;
151 dc->vmsd = &vmstate_i82374;
152 device_class_set_props(dc, i82374_properties);
153 }
154
155 static const TypeInfo i82374_info = {
156 .name = TYPE_I82374,
157 .parent = TYPE_ISA_DEVICE,
158 .instance_size = sizeof(I82374State),
159 .class_init = i82374_class_init,
160 };
161
162 static void i82374_register_types(void)
163 {
164 type_register_static(&i82374_info);
165 }
166
167 type_init(i82374_register_types)