linux-user, arm: add syscall table generation support
[qemu.git] / hw / i386 / vmport.c
1 /*
2 * QEMU VMPort emulation
3 *
4 * Copyright (C) 2007 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 #include "qemu/osdep.h"
25 #include "hw/isa/isa.h"
26 #include "hw/i386/pc.h"
27 #include "hw/input/i8042.h"
28 #include "sysemu/hw_accel.h"
29 #include "qemu/log.h"
30 #include "trace.h"
31
32 #define VMPORT_CMD_GETVERSION 0x0a
33 #define VMPORT_CMD_GETRAMSIZE 0x14
34
35 #define VMPORT_ENTRIES 0x2c
36 #define VMPORT_MAGIC 0x564D5868
37
38 #define VMPORT(obj) OBJECT_CHECK(VMPortState, (obj), TYPE_VMPORT)
39
40 typedef struct VMPortState {
41 ISADevice parent_obj;
42
43 MemoryRegion io;
44 VMPortReadFunc *func[VMPORT_ENTRIES];
45 void *opaque[VMPORT_ENTRIES];
46 } VMPortState;
47
48 static VMPortState *port_state;
49
50 void vmport_register(unsigned char command, VMPortReadFunc *func, void *opaque)
51 {
52 if (command >= VMPORT_ENTRIES) {
53 return;
54 }
55
56 trace_vmport_register(command, func, opaque);
57 port_state->func[command] = func;
58 port_state->opaque[command] = opaque;
59 }
60
61 static uint64_t vmport_ioport_read(void *opaque, hwaddr addr,
62 unsigned size)
63 {
64 VMPortState *s = opaque;
65 CPUState *cs = current_cpu;
66 X86CPU *cpu = X86_CPU(cs);
67 CPUX86State *env = &cpu->env;
68 unsigned char command;
69 uint32_t eax;
70
71 cpu_synchronize_state(cs);
72
73 eax = env->regs[R_EAX];
74 if (eax != VMPORT_MAGIC) {
75 return eax;
76 }
77
78 command = env->regs[R_ECX];
79 trace_vmport_command(command);
80 if (command >= VMPORT_ENTRIES || !s->func[command]) {
81 qemu_log_mask(LOG_UNIMP, "vmport: unknown command %x\n", command);
82 return eax;
83 }
84
85 return s->func[command](s->opaque[command], addr);
86 }
87
88 static void vmport_ioport_write(void *opaque, hwaddr addr,
89 uint64_t val, unsigned size)
90 {
91 X86CPU *cpu = X86_CPU(current_cpu);
92
93 cpu->env.regs[R_EAX] = vmport_ioport_read(opaque, addr, 4);
94 }
95
96 static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr)
97 {
98 X86CPU *cpu = X86_CPU(current_cpu);
99
100 cpu->env.regs[R_EBX] = VMPORT_MAGIC;
101 return 6;
102 }
103
104 static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr)
105 {
106 X86CPU *cpu = X86_CPU(current_cpu);
107
108 cpu->env.regs[R_EBX] = 0x1177;
109 return ram_size;
110 }
111
112 /* vmmouse helpers */
113 void vmmouse_get_data(uint32_t *data)
114 {
115 X86CPU *cpu = X86_CPU(current_cpu);
116 CPUX86State *env = &cpu->env;
117
118 data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX];
119 data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX];
120 data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI];
121 }
122
123 void vmmouse_set_data(const uint32_t *data)
124 {
125 X86CPU *cpu = X86_CPU(current_cpu);
126 CPUX86State *env = &cpu->env;
127
128 env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1];
129 env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3];
130 env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5];
131 }
132
133 static const MemoryRegionOps vmport_ops = {
134 .read = vmport_ioport_read,
135 .write = vmport_ioport_write,
136 .impl = {
137 .min_access_size = 4,
138 .max_access_size = 4,
139 },
140 .endianness = DEVICE_LITTLE_ENDIAN,
141 };
142
143 static void vmport_realizefn(DeviceState *dev, Error **errp)
144 {
145 ISADevice *isadev = ISA_DEVICE(dev);
146 VMPortState *s = VMPORT(dev);
147
148 memory_region_init_io(&s->io, OBJECT(s), &vmport_ops, s, "vmport", 1);
149 isa_register_ioport(isadev, &s->io, 0x5658);
150
151 port_state = s;
152 /* Register some generic port commands */
153 vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL);
154 vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
155 }
156
157 static void vmport_class_initfn(ObjectClass *klass, void *data)
158 {
159 DeviceClass *dc = DEVICE_CLASS(klass);
160
161 dc->realize = vmport_realizefn;
162 /* Reason: realize sets global port_state */
163 dc->user_creatable = false;
164 }
165
166 static const TypeInfo vmport_info = {
167 .name = TYPE_VMPORT,
168 .parent = TYPE_ISA_DEVICE,
169 .instance_size = sizeof(VMPortState),
170 .class_init = vmport_class_initfn,
171 };
172
173 static void vmport_register_types(void)
174 {
175 type_register_static(&vmport_info);
176 }
177
178 type_init(vmport_register_types)