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) |
179 | |