Archipelago » qemu

/*

 * QEMU System Emulator

 *

 * Copyright (c) 2003-2008 Fabrice Bellard

 *

 * 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.

 */

/*

 * splitted out ioport related stuffs from vl.c.

 */

#include "ioport.h"

/***********************************************************/

/* IO Port */

//#define DEBUG_UNUSED_IOPORT

//#define DEBUG_IOPORT

#ifdef DEBUG_IOPORT

#  define LOG_IOPORT(...) qemu_log_mask(CPU_LOG_IOPORT, ## __VA_ARGS__)

#else

#  define LOG_IOPORT(...) do { } while (0)

#endif

/* XXX: use a two level table to limit memory usage */

static void *ioport_opaque[MAX_IOPORTS];

static IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];

static IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];

static IOPortReadFunc default_ioport_readb, default_ioport_readw, default_ioport_readl;

static IOPortWriteFunc default_ioport_writeb, default_ioport_writew, default_ioport_writel;

static uint32_t ioport_read(int index, uint32_t address)

{

    static IOPortReadFunc *default_func[3] = {

        default_ioport_readb,

        default_ioport_readw,

        default_ioport_readl

    };

    IOPortReadFunc *func = ioport_read_table[index][address];

    if (!func)

        func = default_func[index];

    return func(ioport_opaque[address], address);

}

static void ioport_write(int index, uint32_t address, uint32_t data)

{

    static IOPortWriteFunc *default_func[3] = {

        default_ioport_writeb,

        default_ioport_writew,

        default_ioport_writel

    };

    IOPortWriteFunc *func = ioport_write_table[index][address];

    if (!func)

        func = default_func[index];

    func(ioport_opaque[address], address, data);

}

static uint32_t default_ioport_readb(void *opaque, uint32_t address)

{

#ifdef DEBUG_UNUSED_IOPORT

    fprintf(stderr, "unused inb: port=0x%04x\n", address);

#endif

    return 0xff;

}

static void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data)

{

#ifdef DEBUG_UNUSED_IOPORT

    fprintf(stderr, "unused outb: port=0x%04x data=0x%02x\n", address, data);

#endif

}

/* default is to make two byte accesses */

static uint32_t default_ioport_readw(void *opaque, uint32_t address)

{

    uint32_t data;

    data = ioport_read(0, address);

    address = (address + 1) & IOPORTS_MASK;

    data |= ioport_read(0, address) << 8;

    return data;

}

static void default_ioport_writew(void *opaque, uint32_t address, uint32_t data)

{

    ioport_write(0, address, data & 0xff);

    address = (address + 1) & IOPORTS_MASK;

    ioport_write(0, address, (data >> 8) & 0xff);

}

static uint32_t default_ioport_readl(void *opaque, uint32_t address)

{

#ifdef DEBUG_UNUSED_IOPORT

    fprintf(stderr, "unused inl: port=0x%04x\n", address);

#endif

    return 0xffffffff;

}

static void default_ioport_writel(void *opaque, uint32_t address, uint32_t data)

{

#ifdef DEBUG_UNUSED_IOPORT

    fprintf(stderr, "unused outl: port=0x%04x data=0x%02x\n", address, data);

#endif

}

static int ioport_bsize(int size, int *bsize)

{

    if (size == 1) {

        *bsize = 0;

    } else if (size == 2) {

        *bsize = 1;

    } else if (size == 4) {

        *bsize = 2;

    } else {

        return -1;

    }

    return 0;

}

/* size is the word size in byte */

int register_ioport_read(int start, int length, int size,

                         IOPortReadFunc *func, void *opaque)

{

    int i, bsize;

    if (ioport_bsize(size, &bsize)) {

        hw_error("register_ioport_read: invalid size");

        return -1;

    }

    for(i = start; i < start + length; i += size) {

        ioport_read_table[bsize][i] = func;

        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)

            hw_error("register_ioport_read: invalid opaque");

        ioport_opaque[i] = opaque;

    }

    return 0;

}

/* size is the word size in byte */

int register_ioport_write(int start, int length, int size,

                          IOPortWriteFunc *func, void *opaque)

{

    int i, bsize;

    if (ioport_bsize(size, &bsize)) {

        hw_error("register_ioport_write: invalid size");

        return -1;

    }

    for(i = start; i < start + length; i += size) {

        ioport_write_table[bsize][i] = func;

        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)

            hw_error("register_ioport_write: invalid opaque");

        ioport_opaque[i] = opaque;

    }

    return 0;

}

void isa_unassign_ioport(int start, int length)

{

    int i;

    for(i = start; i < start + length; i++) {

        ioport_read_table[0][i] = default_ioport_readb;

        ioport_read_table[1][i] = default_ioport_readw;

        ioport_read_table[2][i] = default_ioport_readl;

        ioport_write_table[0][i] = default_ioport_writeb;

        ioport_write_table[1][i] = default_ioport_writew;

        ioport_write_table[2][i] = default_ioport_writel;

        ioport_opaque[i] = NULL;

    }

}

/***********************************************************/

void cpu_outb(CPUState *env, int addr, int val)

{

    LOG_IOPORT("outb: %04x %02x\n", addr, val);

    ioport_write(0, addr, val);

#ifdef CONFIG_KQEMU

    if (env)

        env->last_io_time = cpu_get_time_fast();

#endif

}

void cpu_outw(CPUState *env, int addr, int val)

{

    LOG_IOPORT("outw: %04x %04x\n", addr, val);

    ioport_write(1, addr, val);

#ifdef CONFIG_KQEMU

    if (env)

        env->last_io_time = cpu_get_time_fast();

#endif

}

void cpu_outl(CPUState *env, int addr, int val)

{

    LOG_IOPORT("outl: %04x %08x\n", addr, val);

    ioport_write(2, addr, val);

#ifdef CONFIG_KQEMU

    if (env)

        env->last_io_time = cpu_get_time_fast();

#endif

}

int cpu_inb(CPUState *env, int addr)

{

    int val;

    val = ioport_read(0, addr);

    LOG_IOPORT("inb : %04x %02x\n", addr, val);

#ifdef CONFIG_KQEMU

    if (env)

        env->last_io_time = cpu_get_time_fast();

#endif

    return val;

}

int cpu_inw(CPUState *env, int addr)

{

    int val;

    val = ioport_read(1, addr);

    LOG_IOPORT("inw : %04x %04x\n", addr, val);

#ifdef CONFIG_KQEMU

    if (env)

        env->last_io_time = cpu_get_time_fast();

#endif

    return val;

}

int cpu_inl(CPUState *env, int addr)

{

    int val;

    val = ioport_read(2, addr);

    LOG_IOPORT("inl : %04x %08x\n", addr, val);

#ifdef CONFIG_KQEMU

    if (env)

        env->last_io_time = cpu_get_time_fast();

#endif

    return val;

}