Commit 23b96cdb authored by Andreas Färber's avatar Andreas Färber
Browse files

prep: Add i82374 DMA emulation



Prepare Intel 82374 emulation for use by Intel 82378 PCI->ISA bridge.

Signed-off-by: default avatarHervé Poussineau <hpoussin@reactos.org>

Confine to CONFIG_I82374. Add VMState.

Signed-off-by: default avatarAndreas Färber <andreas.faerber@web.de>
Reviewed-by: default avatarAlexander Graf <agraf@suse.de>
parent 1c75457f
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+1 −0
Original line number Diff line number Diff line
@@ -216,6 +216,7 @@ hw-obj-$(CONFIG_FDC) += fdc.o
hw-obj-$(CONFIG_ACPI) += acpi.o acpi_piix4.o
hw-obj-$(CONFIG_APM) += pm_smbus.o apm.o
hw-obj-$(CONFIG_DMA) += dma.o
hw-obj-$(CONFIG_I82374) += i82374.o
hw-obj-$(CONFIG_HPET) += hpet.o
hw-obj-$(CONFIG_APPLESMC) += applesmc.o
hw-obj-$(CONFIG_SMARTCARD) += usb-ccid.o ccid-card-passthru.o
+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ CONFIG_I8254=y
CONFIG_PCKBD=y
CONFIG_FDC=y
CONFIG_DMA=y
CONFIG_I82374=y
CONFIG_OPENPIC=y
CONFIG_PREP_PCI=y
CONFIG_MACIO=y

hw/i82374.c

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/*
 * QEMU Intel 82374 emulation (Enhanced DMA controller)
 *
 * Copyright (c) 2010 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 "isa.h"

//#define DEBUG_I82374

#ifdef DEBUG_I82374
#define DPRINTF(fmt, ...) \
do { fprintf(stderr, "i82374: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
do {} while (0)
#endif
#define BADF(fmt, ...) \
do { fprintf(stderr, "i82374 ERROR: " fmt , ## __VA_ARGS__); } while (0)

typedef struct I82374State {
    uint8_t commands[8];
} I82374State;

static const VMStateDescription vmstate_i82374 = {
    .name = "i82374",
    .version_id = 0,
    .minimum_version_id = 0,
    .fields = (VMStateField[]) {
        VMSTATE_UINT8_ARRAY(commands, I82374State, 8),
        VMSTATE_END_OF_LIST()
    },
};

static uint32_t i82374_read_isr(void *opaque, uint32_t nport)
{
    uint32_t val = 0;

    BADF("%s: %08x\n", __func__, nport);

    DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
    return val;
}

static void i82374_write_command(void *opaque, uint32_t nport, uint32_t data)
{
    DPRINTF("%s: %08x=%08x\n", __func__, nport, data);

    if (data != 0x42) {
        /* Not Stop S/G command */
        BADF("%s: %08x=%08x\n", __func__, nport, data);
    }
}

static uint32_t i82374_read_status(void *opaque, uint32_t nport)
{
    uint32_t val = 0;

    BADF("%s: %08x\n", __func__, nport);

    DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
    return val;
}

static void i82374_write_descriptor(void *opaque, uint32_t nport, uint32_t data)
{
    DPRINTF("%s: %08x=%08x\n", __func__, nport, data);

    BADF("%s: %08x=%08x\n", __func__, nport, data);
}

static uint32_t i82374_read_descriptor(void *opaque, uint32_t nport)
{
    uint32_t val = 0;

    BADF("%s: %08x\n", __func__, nport);

    DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
    return val;
}

static void i82374_init(I82374State *s)
{
    DMA_init(1, NULL);
    memset(s->commands, 0, sizeof(s->commands));
}

typedef struct ISAi82374State {
    ISADevice dev;
    uint32_t iobase;
    I82374State state;
} ISAi82374State;

static const VMStateDescription vmstate_isa_i82374 = {
    .name = "isa-i82374",
    .version_id = 0,
    .minimum_version_id = 0,
    .fields = (VMStateField[]) {
        VMSTATE_STRUCT(state, ISAi82374State, 0, vmstate_i82374, I82374State),
        VMSTATE_END_OF_LIST()
    },
};

static int i82374_isa_init(ISADevice *dev)
{
    ISAi82374State *isa = DO_UPCAST(ISAi82374State, dev, dev);
    I82374State *s = &isa->state;

    register_ioport_read(isa->iobase + 0x0A, 1, 1, i82374_read_isr, s);
    register_ioport_write(isa->iobase + 0x10, 8, 1, i82374_write_command, s);
    register_ioport_read(isa->iobase + 0x18, 8, 1, i82374_read_status, s);
    register_ioport_write(isa->iobase + 0x20, 0x20, 1, i82374_write_descriptor, s);
    register_ioport_read(isa->iobase + 0x20, 0x20, 1, i82374_read_descriptor, s);

    i82374_init(s);

    return 0;
}

static ISADeviceInfo i82374_isa_info = {
    .qdev.name  = "i82374",
    .qdev.size  = sizeof(ISAi82374State),
    .qdev.vmsd  = &vmstate_isa_i82374,
    .init       = i82374_isa_init,
    .qdev.props = (Property[]) {
        DEFINE_PROP_HEX32("iobase", ISAi82374State, iobase, 0x400),
        DEFINE_PROP_END_OF_LIST()
    },
};

static void i82374_register_devices(void)
{
    isa_qdev_register(&i82374_isa_info);
}

device_init(i82374_register_devices)