diff options
Diffstat (limited to 'hw/i386/vmport.c')
| -rw-r--r-- | hw/i386/vmport.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/hw/i386/vmport.c b/hw/i386/vmport.c new file mode 100644 index 0000000000..116aa09819 --- /dev/null +++ b/hw/i386/vmport.c @@ -0,0 +1,179 @@ +/* + * 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/hw.h" +#include "hw/isa/isa.h" +#include "hw/i386/pc.h" +#include "sysemu/hw_accel.h" +#include "hw/qdev.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) |