root / hw / vmport.c @ 9c17d615
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/*
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* QEMU VMPort emulation
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*
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* Copyright (C) 2007 Hervé Poussineau
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h" |
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#include "isa.h" |
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#include "pc.h" |
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#include "sysemu/kvm.h" |
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#include "qdev.h" |
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//#define VMPORT_DEBUG
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#define VMPORT_CMD_GETVERSION 0x0a |
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#define VMPORT_CMD_GETRAMSIZE 0x14 |
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#define VMPORT_ENTRIES 0x2c |
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#define VMPORT_MAGIC 0x564D5868 |
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typedef struct _VMPortState |
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{ |
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ISADevice dev; |
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MemoryRegion io; |
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IOPortReadFunc *func[VMPORT_ENTRIES]; |
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void *opaque[VMPORT_ENTRIES];
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} VMPortState; |
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static VMPortState *port_state;
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void vmport_register(unsigned char command, IOPortReadFunc *func, void *opaque) |
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{ |
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if (command >= VMPORT_ENTRIES)
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return;
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port_state->func[command] = func; |
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port_state->opaque[command] = opaque; |
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} |
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static uint64_t vmport_ioport_read(void *opaque, hwaddr addr, |
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unsigned size)
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{ |
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VMPortState *s = opaque; |
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CPUX86State *env = cpu_single_env; |
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unsigned char command; |
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uint32_t eax; |
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cpu_synchronize_state(env); |
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eax = env->regs[R_EAX]; |
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if (eax != VMPORT_MAGIC)
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return eax;
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command = env->regs[R_ECX]; |
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if (command >= VMPORT_ENTRIES)
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return eax;
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if (!s->func[command])
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{ |
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#ifdef VMPORT_DEBUG
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fprintf(stderr, "vmport: unknown command %x\n", command);
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#endif
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return eax;
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} |
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return s->func[command](s->opaque[command], addr);
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} |
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static void vmport_ioport_write(void *opaque, hwaddr addr, |
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uint64_t val, unsigned size)
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{ |
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CPUX86State *env = cpu_single_env; |
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env->regs[R_EAX] = vmport_ioport_read(opaque, addr, 4);
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} |
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static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr) |
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{ |
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CPUX86State *env = cpu_single_env; |
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env->regs[R_EBX] = VMPORT_MAGIC; |
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return 6; |
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} |
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static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr) |
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{ |
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CPUX86State *env = cpu_single_env; |
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env->regs[R_EBX] = 0x1177;
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return ram_size;
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} |
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/* vmmouse helpers */
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void vmmouse_get_data(uint32_t *data)
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{ |
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CPUX86State *env = cpu_single_env; |
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data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX]; |
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data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX]; |
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data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI]; |
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} |
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void vmmouse_set_data(const uint32_t *data) |
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{ |
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CPUX86State *env = cpu_single_env; |
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env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1]; |
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env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3]; |
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env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5]; |
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} |
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static const MemoryRegionOps vmport_ops = { |
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.read = vmport_ioport_read, |
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.write = vmport_ioport_write, |
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.impl = { |
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.min_access_size = 4,
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.max_access_size = 4,
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}, |
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.endianness = DEVICE_LITTLE_ENDIAN, |
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}; |
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static int vmport_initfn(ISADevice *dev) |
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{ |
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VMPortState *s = DO_UPCAST(VMPortState, dev, dev); |
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memory_region_init_io(&s->io, &vmport_ops, s, "vmport", 1); |
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isa_register_ioport(dev, &s->io, 0x5658);
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port_state = s; |
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/* Register some generic port commands */
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vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL);
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vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
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return 0; |
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} |
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static void vmport_class_initfn(ObjectClass *klass, void *data) |
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{ |
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DeviceClass *dc = DEVICE_CLASS(klass); |
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ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); |
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ic->init = vmport_initfn; |
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dc->no_user = 1;
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} |
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static TypeInfo vmport_info = {
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.name = "vmport",
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.parent = TYPE_ISA_DEVICE, |
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.instance_size = sizeof(VMPortState),
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.class_init = vmport_class_initfn, |
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}; |
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static void vmport_register_types(void) |
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{ |
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type_register_static(&vmport_info); |
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} |
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type_init(vmport_register_types) |