diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/i82374.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/hw/i82374.c b/hw/i82374.c new file mode 100644 index 0000000..616d1fc --- /dev/null +++ b/hw/i82374.c @@ -0,0 +1,154 @@ +/* + * 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) |