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/hw.h" 26 #include "hw/isa/isa.h" 27 #include "hw/i386/pc.h" 28 #include "hw/input/i8042.h" 29 #include "sysemu/hw_accel.h" 30 #include "hw/qdev.h" 31 #include "qemu/log.h" 32 #include "trace.h" 33 34 #define VMPORT_CMD_GETVERSION 0x0a 35 #define VMPORT_CMD_GETRAMSIZE 0x14 36 37 #define VMPORT_ENTRIES 0x2c 38 #define VMPORT_MAGIC 0x564D5868 39 40 #define VMPORT(obj) OBJECT_CHECK(VMPortState, (obj), TYPE_VMPORT) 41 42 typedef struct VMPortState { 43 ISADevice parent_obj; 44 45 MemoryRegion io; 46 VMPortReadFunc *func[VMPORT_ENTRIES]; 47 void *opaque[VMPORT_ENTRIES]; 48 } VMPortState; 49 50 static VMPortState *port_state; 51 52 void vmport_register(unsigned char command, VMPortReadFunc *func, void *opaque) 53 { 54 if (command >= VMPORT_ENTRIES) { 55 return; 56 } 57 58 trace_vmport_register(command, func, opaque); 59 port_state->func[command] = func; 60 port_state->opaque[command] = opaque; 61 } 62 63 static uint64_t vmport_ioport_read(void *opaque, hwaddr addr, 64 unsigned size) 65 { 66 VMPortState *s = opaque; 67 CPUState *cs = current_cpu; 68 X86CPU *cpu = X86_CPU(cs); 69 CPUX86State *env = &cpu->env; 70 unsigned char command; 71 uint32_t eax; 72 73 cpu_synchronize_state(cs); 74 75 eax = env->regs[R_EAX]; 76 if (eax != VMPORT_MAGIC) { 77 return eax; 78 } 79 80 command = env->regs[R_ECX]; 81 trace_vmport_command(command); 82 if (command >= VMPORT_ENTRIES || !s->func[command]) { 83 qemu_log_mask(LOG_UNIMP, "vmport: unknown command %x\n", command); 84 return eax; 85 } 86 87 return s->func[command](s->opaque[command], addr); 88 } 89 90 static void vmport_ioport_write(void *opaque, hwaddr addr, 91 uint64_t val, unsigned size) 92 { 93 X86CPU *cpu = X86_CPU(current_cpu); 94 95 cpu->env.regs[R_EAX] = vmport_ioport_read(opaque, addr, 4); 96 } 97 98 static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr) 99 { 100 X86CPU *cpu = X86_CPU(current_cpu); 101 102 cpu->env.regs[R_EBX] = VMPORT_MAGIC; 103 return 6; 104 } 105 106 static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr) 107 { 108 X86CPU *cpu = X86_CPU(current_cpu); 109 110 cpu->env.regs[R_EBX] = 0x1177; 111 return ram_size; 112 } 113 114 /* vmmouse helpers */ 115 void vmmouse_get_data(uint32_t *data) 116 { 117 X86CPU *cpu = X86_CPU(current_cpu); 118 CPUX86State *env = &cpu->env; 119 120 data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX]; 121 data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX]; 122 data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI]; 123 } 124 125 void vmmouse_set_data(const uint32_t *data) 126 { 127 X86CPU *cpu = X86_CPU(current_cpu); 128 CPUX86State *env = &cpu->env; 129 130 env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1]; 131 env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3]; 132 env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5]; 133 } 134 135 static const MemoryRegionOps vmport_ops = { 136 .read = vmport_ioport_read, 137 .write = vmport_ioport_write, 138 .impl = { 139 .min_access_size = 4, 140 .max_access_size = 4, 141 }, 142 .endianness = DEVICE_LITTLE_ENDIAN, 143 }; 144 145 static void vmport_realizefn(DeviceState *dev, Error **errp) 146 { 147 ISADevice *isadev = ISA_DEVICE(dev); 148 VMPortState *s = VMPORT(dev); 149 150 memory_region_init_io(&s->io, OBJECT(s), &vmport_ops, s, "vmport", 1); 151 isa_register_ioport(isadev, &s->io, 0x5658); 152 153 port_state = s; 154 /* Register some generic port commands */ 155 vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL); 156 vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL); 157 } 158 159 static void vmport_class_initfn(ObjectClass *klass, void *data) 160 { 161 DeviceClass *dc = DEVICE_CLASS(klass); 162 163 dc->realize = vmport_realizefn; 164 /* Reason: realize sets global port_state */ 165 dc->user_creatable = false; 166 } 167 168 static const TypeInfo vmport_info = { 169 .name = TYPE_VMPORT, 170 .parent = TYPE_ISA_DEVICE, 171 .instance_size = sizeof(VMPortState), 172 .class_init = vmport_class_initfn, 173 }; 174 175 static void vmport_register_types(void) 176 { 177 type_register_static(&vmport_info); 178 } 179 180 type_init(vmport_register_types) 181