Archipelago » qemu

/*

 * 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 "hw/hw.h"

#include "hw/isa/isa.h"

#include "hw/i386/pc.h"

#include "sysemu/kvm.h"

#include "hw/qdev.h"

//#define VMPORT_DEBUG

#define VMPORT_CMD_GETVERSION 0x0a

#define VMPORT_CMD_GETRAMSIZE 0x14

#define VMPORT_ENTRIES 0x2c

#define VMPORT_MAGIC   0x564D5868

typedef struct _VMPortState

{

    ISADevice dev;

    MemoryRegion io;

    IOPortReadFunc *func[VMPORT_ENTRIES];

    void *opaque[VMPORT_ENTRIES];

} VMPortState;

static VMPortState *port_state;

void vmport_register(unsigned char command, IOPortReadFunc *func, void *opaque)

{

    if (command >= VMPORT_ENTRIES)

        return;

    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;

    CPUX86State *env = cpu_single_env;

    unsigned char command;

    uint32_t eax;

    cpu_synchronize_state(env);

    eax = env->regs[R_EAX];

    if (eax != VMPORT_MAGIC)

        return eax;

    command = env->regs[R_ECX];

    if (command >= VMPORT_ENTRIES)

        return eax;

    if (!s->func[command])

    {

#ifdef VMPORT_DEBUG

        fprintf(stderr, "vmport: unknown command %x\n", command);

#endif

        return eax;

    }

    return s->func[command](s->opaque[command], addr);

}

static void vmport_ioport_write(void *opaque, hwaddr addr,

                                uint64_t val, unsigned size)

{

    CPUX86State *env = cpu_single_env;

    env->regs[R_EAX] = vmport_ioport_read(opaque, addr, 4);

}

static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr)

{

    CPUX86State *env = cpu_single_env;

    env->regs[R_EBX] = VMPORT_MAGIC;

    return 6;

}

static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr)

{

    CPUX86State *env = cpu_single_env;

    env->regs[R_EBX] = 0x1177;

    return ram_size;

}

/* vmmouse helpers */

void vmmouse_get_data(uint32_t *data)

{

    CPUX86State *env = cpu_single_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)

{

    CPUX86State *env = cpu_single_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 int vmport_initfn(ISADevice *dev)

{

    VMPortState *s = DO_UPCAST(VMPortState, dev, dev);

    memory_region_init_io(&s->io, &vmport_ops, s, "vmport", 1);

    isa_register_ioport(dev, &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);

    return 0;

}

static void vmport_class_initfn(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);

    ic->init = vmport_initfn;

    dc->no_user = 1;

}

static const TypeInfo vmport_info = {

    .name          = "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)