2 * QEMU VMPort emulation
4 * Copyright (C) 2007 Hervé Poussineau
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
24 #include "qemu/osdep.h"
26 #include "hw/isa/isa.h"
27 #include "hw/i386/pc.h"
28 #include "sysemu/hw_accel.h"
33 #define VMPORT_CMD_GETVERSION 0x0a
34 #define VMPORT_CMD_GETRAMSIZE 0x14
36 #define VMPORT_ENTRIES 0x2c
37 #define VMPORT_MAGIC 0x564D5868
39 #define VMPORT(obj) OBJECT_CHECK(VMPortState, (obj), TYPE_VMPORT)
41 typedef struct VMPortState
{
45 VMPortReadFunc
*func
[VMPORT_ENTRIES
];
46 void *opaque
[VMPORT_ENTRIES
];
49 static VMPortState
*port_state
;
51 void vmport_register(unsigned char command
, VMPortReadFunc
*func
, void *opaque
)
53 if (command
>= VMPORT_ENTRIES
) {
57 trace_vmport_register(command
, func
, opaque
);
58 port_state
->func
[command
] = func
;
59 port_state
->opaque
[command
] = opaque
;
62 static uint64_t vmport_ioport_read(void *opaque
, hwaddr addr
,
65 VMPortState
*s
= opaque
;
66 CPUState
*cs
= current_cpu
;
67 X86CPU
*cpu
= X86_CPU(cs
);
68 CPUX86State
*env
= &cpu
->env
;
69 unsigned char command
;
72 cpu_synchronize_state(cs
);
74 eax
= env
->regs
[R_EAX
];
75 if (eax
!= VMPORT_MAGIC
) {
79 command
= env
->regs
[R_ECX
];
80 trace_vmport_command(command
);
81 if (command
>= VMPORT_ENTRIES
|| !s
->func
[command
]) {
82 qemu_log_mask(LOG_UNIMP
, "vmport: unknown command %x\n", command
);
86 return s
->func
[command
](s
->opaque
[command
], addr
);
89 static void vmport_ioport_write(void *opaque
, hwaddr addr
,
90 uint64_t val
, unsigned size
)
92 X86CPU
*cpu
= X86_CPU(current_cpu
);
94 cpu
->env
.regs
[R_EAX
] = vmport_ioport_read(opaque
, addr
, 4);
97 static uint32_t vmport_cmd_get_version(void *opaque
, uint32_t addr
)
99 X86CPU
*cpu
= X86_CPU(current_cpu
);
101 cpu
->env
.regs
[R_EBX
] = VMPORT_MAGIC
;
105 static uint32_t vmport_cmd_ram_size(void *opaque
, uint32_t addr
)
107 X86CPU
*cpu
= X86_CPU(current_cpu
);
109 cpu
->env
.regs
[R_EBX
] = 0x1177;
113 /* vmmouse helpers */
114 void vmmouse_get_data(uint32_t *data
)
116 X86CPU
*cpu
= X86_CPU(current_cpu
);
117 CPUX86State
*env
= &cpu
->env
;
119 data
[0] = env
->regs
[R_EAX
]; data
[1] = env
->regs
[R_EBX
];
120 data
[2] = env
->regs
[R_ECX
]; data
[3] = env
->regs
[R_EDX
];
121 data
[4] = env
->regs
[R_ESI
]; data
[5] = env
->regs
[R_EDI
];
124 void vmmouse_set_data(const uint32_t *data
)
126 X86CPU
*cpu
= X86_CPU(current_cpu
);
127 CPUX86State
*env
= &cpu
->env
;
129 env
->regs
[R_EAX
] = data
[0]; env
->regs
[R_EBX
] = data
[1];
130 env
->regs
[R_ECX
] = data
[2]; env
->regs
[R_EDX
] = data
[3];
131 env
->regs
[R_ESI
] = data
[4]; env
->regs
[R_EDI
] = data
[5];
134 static const MemoryRegionOps vmport_ops
= {
135 .read
= vmport_ioport_read
,
136 .write
= vmport_ioport_write
,
138 .min_access_size
= 4,
139 .max_access_size
= 4,
141 .endianness
= DEVICE_LITTLE_ENDIAN
,
144 static void vmport_realizefn(DeviceState
*dev
, Error
**errp
)
146 ISADevice
*isadev
= ISA_DEVICE(dev
);
147 VMPortState
*s
= VMPORT(dev
);
149 memory_region_init_io(&s
->io
, OBJECT(s
), &vmport_ops
, s
, "vmport", 1);
150 isa_register_ioport(isadev
, &s
->io
, 0x5658);
153 /* Register some generic port commands */
154 vmport_register(VMPORT_CMD_GETVERSION
, vmport_cmd_get_version
, NULL
);
155 vmport_register(VMPORT_CMD_GETRAMSIZE
, vmport_cmd_ram_size
, NULL
);
158 static void vmport_class_initfn(ObjectClass
*klass
, void *data
)
160 DeviceClass
*dc
= DEVICE_CLASS(klass
);
162 dc
->realize
= vmport_realizefn
;
163 /* Reason: realize sets global port_state */
164 dc
->user_creatable
= false;
167 static const TypeInfo vmport_info
= {
169 .parent
= TYPE_ISA_DEVICE
,
170 .instance_size
= sizeof(VMPortState
),
171 .class_init
= vmport_class_initfn
,
174 static void vmport_register_types(void)
176 type_register_static(&vmport_info
);
179 type_init(vmport_register_types
)