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