131 lines
4.0 KiB
C
131 lines
4.0 KiB
C
/*
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* QEMU IDE Emulation: mmio support (for embedded).
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*
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* Copyright (c) 2003 Fabrice Bellard
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* Copyright (c) 2006 Openedhand Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <hw/hw.h>
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#include "block.h"
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#include "dma.h"
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#include <hw/ide/internal.h>
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/***********************************************************/
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/* MMIO based ide port
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* This emulates IDE device connected directly to the CPU bus without
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* dedicated ide controller, which is often seen on embedded boards.
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*/
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typedef struct {
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IDEBus bus;
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int shift;
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MemoryRegion iomem1, iomem2;
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} MMIOState;
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static void mmio_ide_reset(void *opaque)
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{
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MMIOState *s = opaque;
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ide_bus_reset(&s->bus);
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}
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static uint64_t mmio_ide_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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MMIOState *s = opaque;
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addr >>= s->shift;
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if (addr & 7)
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return ide_ioport_read(&s->bus, addr);
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else
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return ide_data_readw(&s->bus, 0);
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}
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static void mmio_ide_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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MMIOState *s = opaque;
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addr >>= s->shift;
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if (addr & 7)
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ide_ioport_write(&s->bus, addr, val);
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else
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ide_data_writew(&s->bus, 0, val);
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}
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static const MemoryRegionOps mmio_ide_ops = {
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.read = mmio_ide_read,
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.write = mmio_ide_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static uint64_t mmio_ide_status_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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MMIOState *s= opaque;
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return ide_status_read(&s->bus, 0);
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}
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static void mmio_ide_cmd_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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MMIOState *s = opaque;
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ide_cmd_write(&s->bus, 0, val);
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}
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static const MemoryRegionOps mmio_ide_cs_ops = {
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.read = mmio_ide_status_read,
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.write = mmio_ide_cmd_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static const VMStateDescription vmstate_ide_mmio = {
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.name = "mmio-ide",
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.version_id = 3,
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.minimum_version_id = 0,
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.minimum_version_id_old = 0,
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.fields = (VMStateField []) {
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VMSTATE_IDE_BUS(bus, MMIOState),
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VMSTATE_IDE_DRIVES(bus.ifs, MMIOState),
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VMSTATE_END_OF_LIST()
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}
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};
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void mmio_ide_init (hwaddr membase, hwaddr membase2,
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MemoryRegion *address_space,
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qemu_irq irq, int shift,
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DriveInfo *hd0, DriveInfo *hd1)
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{
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MMIOState *s = g_malloc0(sizeof(MMIOState));
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ide_init2_with_non_qdev_drives(&s->bus, hd0, hd1, irq);
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s->shift = shift;
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memory_region_init_io(&s->iomem1, &mmio_ide_ops, s,
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"ide-mmio.1", 16 << shift);
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memory_region_init_io(&s->iomem2, &mmio_ide_cs_ops, s,
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"ide-mmio.2", 2 << shift);
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memory_region_add_subregion(address_space, membase, &s->iomem1);
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memory_region_add_subregion(address_space, membase2, &s->iomem2);
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vmstate_register(NULL, 0, &vmstate_ide_mmio, s);
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qemu_register_reset(mmio_ide_reset, s);
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}
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