Archipelago » qemu

/*

 * Memory mapped access to ISA IO space.

 *

 * Copyright (c) 2006 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.

 */

#include "hw.h"

#include "isa.h"

static void isa_mmio_writeb (void *opaque, target_phys_addr_t addr,

                                  uint32_t val)

{

    cpu_outb(NULL, addr & 0xffff, val);

}

static void isa_mmio_writew (void *opaque, target_phys_addr_t addr,

                                  uint32_t val)

{

#ifdef TARGET_WORDS_BIGENDIAN

    val = bswap16(val);

#endif

    cpu_outw(NULL, addr & 0xffff, val);

}

static void isa_mmio_writel (void *opaque, target_phys_addr_t addr,

                                uint32_t val)

{

#ifdef TARGET_WORDS_BIGENDIAN

    val = bswap32(val);

#endif

    cpu_outl(NULL, addr & 0xffff, val);

}

static uint32_t isa_mmio_readb (void *opaque, target_phys_addr_t addr)

{

    uint32_t val;

    val = cpu_inb(NULL, addr & 0xffff);

    return val;

}

static uint32_t isa_mmio_readw (void *opaque, target_phys_addr_t addr)

{

    uint32_t val;

    val = cpu_inw(NULL, addr & 0xffff);

#ifdef TARGET_WORDS_BIGENDIAN

    val = bswap16(val);

#endif

    return val;

}

static uint32_t isa_mmio_readl (void *opaque, target_phys_addr_t addr)

{

    uint32_t val;

    val = cpu_inl(NULL, addr & 0xffff);

#ifdef TARGET_WORDS_BIGENDIAN

    val = bswap32(val);

#endif

    return val;

}

static CPUWriteMemoryFunc *isa_mmio_write[] = {

    &isa_mmio_writeb,

    &isa_mmio_writew,

    &isa_mmio_writel,

};

static CPUReadMemoryFunc *isa_mmio_read[] = {

    &isa_mmio_readb,

    &isa_mmio_readw,

    &isa_mmio_readl,

};

static int isa_mmio_iomemtype = 0;

void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size)

{

    if (!isa_mmio_iomemtype) {

        isa_mmio_iomemtype = cpu_register_io_memory(isa_mmio_read,

                                                    isa_mmio_write, NULL);

    }

    cpu_register_physical_memory(base, size, isa_mmio_iomemtype);

}