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Commit | Line | Data |
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0975c304 TS |
1 | /* |
2 | * QEMU VMPort emulation | |
3 | * | |
bcc4e41f | 4 | * Copyright (C) 2007 Hervé Poussineau |
0975c304 TS |
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 | */ | |
0d1c9782 | 24 | #include "qemu/osdep.h" |
0d09e41a | 25 | #include "hw/isa/isa.h" |
b3946626 | 26 | #include "sysemu/hw_accel.h" |
43ab9a53 | 27 | #include "qemu/log.h" |
e5951129 | 28 | #include "vmport.h" |
d8a05995 | 29 | #include "cpu.h" |
7299e1a4 | 30 | #include "trace.h" |
61ada15d | 31 | |
0975c304 TS |
32 | #define VMPORT_CMD_GETVERSION 0x0a |
33 | #define VMPORT_CMD_GETRAMSIZE 0x14 | |
34 | ||
35 | #define VMPORT_ENTRIES 0x2c | |
36 | #define VMPORT_MAGIC 0x564D5868 | |
37 | ||
f02317ad AF |
38 | #define VMPORT(obj) OBJECT_CHECK(VMPortState, (obj), TYPE_VMPORT) |
39 | ||
323d7d1d | 40 | typedef struct VMPortState { |
f02317ad AF |
41 | ISADevice parent_obj; |
42 | ||
f75317b4 | 43 | MemoryRegion io; |
d67f679d | 44 | VMPortReadFunc *func[VMPORT_ENTRIES]; |
0975c304 TS |
45 | void *opaque[VMPORT_ENTRIES]; |
46 | } VMPortState; | |
47 | ||
e14da0af | 48 | static VMPortState *port_state; |
0975c304 | 49 | |
d67f679d | 50 | void vmport_register(unsigned char command, VMPortReadFunc *func, void *opaque) |
0975c304 | 51 | { |
323d7d1d | 52 | if (command >= VMPORT_ENTRIES) { |
0975c304 | 53 | return; |
323d7d1d | 54 | } |
0975c304 | 55 | |
7299e1a4 | 56 | trace_vmport_register(command, func, opaque); |
e14da0af MT |
57 | port_state->func[command] = func; |
58 | port_state->opaque[command] = opaque; | |
0975c304 TS |
59 | } |
60 | ||
360d613e AG |
61 | static uint64_t vmport_ioport_read(void *opaque, hwaddr addr, |
62 | unsigned size) | |
0975c304 TS |
63 | { |
64 | VMPortState *s = opaque; | |
4917cf44 AF |
65 | CPUState *cs = current_cpu; |
66 | X86CPU *cpu = X86_CPU(cs); | |
67 | CPUX86State *env = &cpu->env; | |
0975c304 | 68 | unsigned char command; |
6dab28d5 | 69 | uint32_t eax; |
0975c304 | 70 | |
4917cf44 | 71 | cpu_synchronize_state(cs); |
03c63b94 | 72 | |
26fb5e48 | 73 | eax = env->regs[R_EAX]; |
323d7d1d | 74 | if (eax != VMPORT_MAGIC) { |
0975c304 | 75 | return eax; |
323d7d1d | 76 | } |
0975c304 | 77 | |
26fb5e48 | 78 | command = env->regs[R_ECX]; |
7299e1a4 PMD |
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); | |
0975c304 TS |
82 | return eax; |
83 | } | |
84 | ||
85 | return s->func[command](s->opaque[command], addr); | |
86 | } | |
87 | ||
360d613e AG |
88 | static void vmport_ioport_write(void *opaque, hwaddr addr, |
89 | uint64_t val, unsigned size) | |
e9396bde | 90 | { |
4917cf44 | 91 | X86CPU *cpu = X86_CPU(current_cpu); |
e9396bde | 92 | |
4917cf44 | 93 | cpu->env.regs[R_EAX] = vmport_ioport_read(opaque, addr, 4); |
e9396bde AL |
94 | } |
95 | ||
0975c304 TS |
96 | static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr) |
97 | { | |
4917cf44 AF |
98 | X86CPU *cpu = X86_CPU(current_cpu); |
99 | ||
100 | cpu->env.regs[R_EBX] = VMPORT_MAGIC; | |
0975c304 TS |
101 | return 6; |
102 | } | |
103 | ||
104 | static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr) | |
105 | { | |
4917cf44 AF |
106 | X86CPU *cpu = X86_CPU(current_cpu); |
107 | ||
108 | cpu->env.regs[R_EBX] = 0x1177; | |
0975c304 TS |
109 | return ram_size; |
110 | } | |
111 | ||
f75317b4 | 112 | static const MemoryRegionOps vmport_ops = { |
360d613e AG |
113 | .read = vmport_ioport_read, |
114 | .write = vmport_ioport_write, | |
115 | .impl = { | |
116 | .min_access_size = 4, | |
117 | .max_access_size = 4, | |
118 | }, | |
119 | .endianness = DEVICE_LITTLE_ENDIAN, | |
f75317b4 RH |
120 | }; |
121 | ||
db895a1e | 122 | static void vmport_realizefn(DeviceState *dev, Error **errp) |
0975c304 | 123 | { |
db895a1e | 124 | ISADevice *isadev = ISA_DEVICE(dev); |
f02317ad | 125 | VMPortState *s = VMPORT(dev); |
0975c304 | 126 | |
3c161542 | 127 | memory_region_init_io(&s->io, OBJECT(s), &vmport_ops, s, "vmport", 1); |
db895a1e | 128 | isa_register_ioport(isadev, &s->io, 0x5658); |
f75317b4 | 129 | |
e14da0af | 130 | port_state = s; |
0975c304 | 131 | /* Register some generic port commands */ |
26fb5e48 AJ |
132 | vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL); |
133 | vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL); | |
0975c304 | 134 | } |
6872ef61 | 135 | |
8f04ee08 AL |
136 | static void vmport_class_initfn(ObjectClass *klass, void *data) |
137 | { | |
39bffca2 | 138 | DeviceClass *dc = DEVICE_CLASS(klass); |
db895a1e AF |
139 | |
140 | dc->realize = vmport_realizefn; | |
f3b17640 | 141 | /* Reason: realize sets global port_state */ |
e90f2a8c | 142 | dc->user_creatable = false; |
8f04ee08 AL |
143 | } |
144 | ||
8c43a6f0 | 145 | static const TypeInfo vmport_info = { |
f02317ad | 146 | .name = TYPE_VMPORT, |
39bffca2 AL |
147 | .parent = TYPE_ISA_DEVICE, |
148 | .instance_size = sizeof(VMPortState), | |
149 | .class_init = vmport_class_initfn, | |
6872ef61 BS |
150 | }; |
151 | ||
83f7d43a | 152 | static void vmport_register_types(void) |
6872ef61 | 153 | { |
39bffca2 | 154 | type_register_static(&vmport_info); |
6872ef61 | 155 | } |
83f7d43a AF |
156 | |
157 | type_init(vmport_register_types) |