| /* |
| * QEMU VMPort emulation |
| * |
| * Copyright (C) 2007 Hervé Poussineau |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| #include "qemu/osdep.h" |
| #include "hw/isa/isa.h" |
| #include "hw/i386/pc.h" |
| #include "hw/input/i8042.h" |
| #include "sysemu/hw_accel.h" |
| #include "qemu/log.h" |
| #include "trace.h" |
| |
| #define VMPORT_CMD_GETVERSION 0x0a |
| #define VMPORT_CMD_GETRAMSIZE 0x14 |
| |
| #define VMPORT_ENTRIES 0x2c |
| #define VMPORT_MAGIC 0x564D5868 |
| |
| #define VMPORT(obj) OBJECT_CHECK(VMPortState, (obj), TYPE_VMPORT) |
| |
| typedef struct VMPortState { |
| ISADevice parent_obj; |
| |
| MemoryRegion io; |
| VMPortReadFunc *func[VMPORT_ENTRIES]; |
| void *opaque[VMPORT_ENTRIES]; |
| } VMPortState; |
| |
| static VMPortState *port_state; |
| |
| void vmport_register(unsigned char command, VMPortReadFunc *func, void *opaque) |
| { |
| if (command >= VMPORT_ENTRIES) { |
| return; |
| } |
| |
| trace_vmport_register(command, func, opaque); |
| port_state->func[command] = func; |
| port_state->opaque[command] = opaque; |
| } |
| |
| static uint64_t vmport_ioport_read(void *opaque, hwaddr addr, |
| unsigned size) |
| { |
| VMPortState *s = opaque; |
| CPUState *cs = current_cpu; |
| X86CPU *cpu = X86_CPU(cs); |
| CPUX86State *env = &cpu->env; |
| unsigned char command; |
| uint32_t eax; |
| |
| cpu_synchronize_state(cs); |
| |
| eax = env->regs[R_EAX]; |
| if (eax != VMPORT_MAGIC) { |
| return eax; |
| } |
| |
| command = env->regs[R_ECX]; |
| trace_vmport_command(command); |
| if (command >= VMPORT_ENTRIES || !s->func[command]) { |
| qemu_log_mask(LOG_UNIMP, "vmport: unknown command %x\n", command); |
| return eax; |
| } |
| |
| return s->func[command](s->opaque[command], addr); |
| } |
| |
| static void vmport_ioport_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned size) |
| { |
| X86CPU *cpu = X86_CPU(current_cpu); |
| |
| cpu->env.regs[R_EAX] = vmport_ioport_read(opaque, addr, 4); |
| } |
| |
| static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr) |
| { |
| X86CPU *cpu = X86_CPU(current_cpu); |
| |
| cpu->env.regs[R_EBX] = VMPORT_MAGIC; |
| return 6; |
| } |
| |
| static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr) |
| { |
| X86CPU *cpu = X86_CPU(current_cpu); |
| |
| cpu->env.regs[R_EBX] = 0x1177; |
| return ram_size; |
| } |
| |
| /* vmmouse helpers */ |
| void vmmouse_get_data(uint32_t *data) |
| { |
| X86CPU *cpu = X86_CPU(current_cpu); |
| CPUX86State *env = &cpu->env; |
| |
| data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX]; |
| data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX]; |
| data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI]; |
| } |
| |
| void vmmouse_set_data(const uint32_t *data) |
| { |
| X86CPU *cpu = X86_CPU(current_cpu); |
| CPUX86State *env = &cpu->env; |
| |
| env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1]; |
| env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3]; |
| env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5]; |
| } |
| |
| static const MemoryRegionOps vmport_ops = { |
| .read = vmport_ioport_read, |
| .write = vmport_ioport_write, |
| .impl = { |
| .min_access_size = 4, |
| .max_access_size = 4, |
| }, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| }; |
| |
| static void vmport_realizefn(DeviceState *dev, Error **errp) |
| { |
| ISADevice *isadev = ISA_DEVICE(dev); |
| VMPortState *s = VMPORT(dev); |
| |
| memory_region_init_io(&s->io, OBJECT(s), &vmport_ops, s, "vmport", 1); |
| isa_register_ioport(isadev, &s->io, 0x5658); |
| |
| port_state = s; |
| /* Register some generic port commands */ |
| vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL); |
| vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL); |
| } |
| |
| static void vmport_class_initfn(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| dc->realize = vmport_realizefn; |
| /* Reason: realize sets global port_state */ |
| dc->user_creatable = false; |
| } |
| |
| static const TypeInfo vmport_info = { |
| .name = TYPE_VMPORT, |
| .parent = TYPE_ISA_DEVICE, |
| .instance_size = sizeof(VMPortState), |
| .class_init = vmport_class_initfn, |
| }; |
| |
| static void vmport_register_types(void) |
| { |
| type_register_static(&vmport_info); |
| } |
| |
| type_init(vmport_register_types) |