LXR qemu/hw/i386/vmport.c

   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
  42typedef struct VMPortState {
  43    ISADevice parent_obj;
  44
  45    MemoryRegion io;
  46    VMPortReadFunc *func[VMPORT_ENTRIES];
  47    void *opaque[VMPORT_ENTRIES];
  48} VMPortState;
  49
  50static VMPortState *port_state;
  51
  52void 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
  63static 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
  90static 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
  98static 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
 106static 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 */
 115void 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
 125void 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
 135static 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
 145static 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
 159static 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
 168static 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
 175static void vmport_register_types(void)
 176{
 177    type_register_static(&vmport_info);
 178}
 179
 180type_init(vmport_register_types)
 181