diff options
Diffstat (limited to 'hw/ide/piix.c')
| -rw-r--r-- | hw/ide/piix.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/hw/ide/piix.c b/hw/ide/piix.c new file mode 100644 index 00000000..267dbf37 --- /dev/null +++ b/hw/ide/piix.c @@ -0,0 +1,239 @@ +/* + * QEMU IDE Emulation: PCI PIIX3/4 support. + * + * Copyright (c) 2003 Fabrice Bellard + * Copyright (c) 2006 Openedhand Ltd. + * + * 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. + * + * References: + * [1] 82371FB (PIIX) AND 82371SB (PIIX3) PCI ISA IDE XCELERATOR, + * 290550-002, Intel Corporation, April 1997. + */ + +#include "qemu/osdep.h" +#include "hw/pci/pci.h" +#include "migration/vmstate.h" +#include "qapi/error.h" +#include "qemu/module.h" +#include "sysemu/block-backend.h" +#include "sysemu/blockdev.h" +#include "sysemu/dma.h" + +#include "hw/ide/piix.h" +#include "hw/ide/pci.h" +#include "trace.h" + +static uint64_t bmdma_read(void *opaque, hwaddr addr, unsigned size) +{ + BMDMAState *bm = opaque; + uint32_t val; + + if (size != 1) { + return ((uint64_t)1 << (size * 8)) - 1; + } + + switch(addr & 3) { + case 0: + val = bm->cmd; + break; + case 2: + val = bm->status; + break; + default: + val = 0xff; + break; + } + + trace_bmdma_read(addr, val); + return val; +} + +static void bmdma_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + BMDMAState *bm = opaque; + + if (size != 1) { + return; + } + + trace_bmdma_write(addr, val); + + switch(addr & 3) { + case 0: + bmdma_cmd_writeb(bm, val); + break; + case 2: + bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06); + break; + } +} + +static const MemoryRegionOps piix_bmdma_ops = { + .read = bmdma_read, + .write = bmdma_write, +}; + +static void bmdma_setup_bar(PCIIDEState *d) +{ + int i; + + memory_region_init(&d->bmdma_bar, OBJECT(d), "piix-bmdma-container", 16); + for(i = 0;i < 2; i++) { + BMDMAState *bm = &d->bmdma[i]; + + memory_region_init_io(&bm->extra_io, OBJECT(d), &piix_bmdma_ops, bm, + "piix-bmdma", 4); + memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io); + memory_region_init_io(&bm->addr_ioport, OBJECT(d), + &bmdma_addr_ioport_ops, bm, "bmdma", 4); + memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport); + } +} + +static void piix_ide_reset(DeviceState *dev) +{ + PCIIDEState *d = PCI_IDE(dev); + PCIDevice *pd = PCI_DEVICE(d); + uint8_t *pci_conf = pd->config; + int i; + + for (i = 0; i < 2; i++) { + ide_bus_reset(&d->bus[i]); + } + + /* PCI command register default value (0000h) per [1, p.48]. */ + pci_set_word(pci_conf + PCI_COMMAND, 0x0000); + pci_set_word(pci_conf + PCI_STATUS, + PCI_STATUS_DEVSEL_MEDIUM | PCI_STATUS_FAST_BACK); + pci_set_byte(pci_conf + 0x20, 0x01); /* BMIBA: 20-23h */ +} + +static int pci_piix_init_ports(PCIIDEState *d) +{ + static const struct { + int iobase; + int iobase2; + int isairq; + } port_info[] = { + {0x1f0, 0x3f6, 14}, + {0x170, 0x376, 15}, + }; + int i, ret; + + for (i = 0; i < 2; i++) { + ide_bus_init(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2); + ret = ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase, + port_info[i].iobase2); + if (ret) { + return ret; + } + ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq)); + + bmdma_init(&d->bus[i], &d->bmdma[i], d); + d->bmdma[i].bus = &d->bus[i]; + ide_register_restart_cb(&d->bus[i]); + } + + return 0; +} + +static void pci_piix_ide_realize(PCIDevice *dev, Error **errp) +{ + PCIIDEState *d = PCI_IDE(dev); + uint8_t *pci_conf = dev->config; + int rc; + + pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode + + bmdma_setup_bar(d); + pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar); + + vmstate_register(VMSTATE_IF(dev), 0, &vmstate_ide_pci, d); + + rc = pci_piix_init_ports(d); + if (rc) { + error_setg_errno(errp, -rc, "Failed to realize %s", + object_get_typename(OBJECT(dev))); + } +} + +static void pci_piix_ide_exitfn(PCIDevice *dev) +{ + PCIIDEState *d = PCI_IDE(dev); + unsigned i; + + for (i = 0; i < 2; ++i) { + memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io); + memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport); + } +} + +/* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */ +static void piix3_ide_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + dc->reset = piix_ide_reset; + k->realize = pci_piix_ide_realize; + k->exit = pci_piix_ide_exitfn; + k->vendor_id = PCI_VENDOR_ID_INTEL; + k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1; + k->class_id = PCI_CLASS_STORAGE_IDE; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + dc->hotpluggable = false; +} + +static const TypeInfo piix3_ide_info = { + .name = TYPE_PIIX3_IDE, + .parent = TYPE_PCI_IDE, + .class_init = piix3_ide_class_init, +}; + +/* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */ +static void piix4_ide_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + dc->reset = piix_ide_reset; + k->realize = pci_piix_ide_realize; + k->exit = pci_piix_ide_exitfn; + k->vendor_id = PCI_VENDOR_ID_INTEL; + k->device_id = PCI_DEVICE_ID_INTEL_82371AB; + k->class_id = PCI_CLASS_STORAGE_IDE; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + dc->hotpluggable = false; +} + +static const TypeInfo piix4_ide_info = { + .name = TYPE_PIIX4_IDE, + .parent = TYPE_PCI_IDE, + .class_init = piix4_ide_class_init, +}; + +static void piix_ide_register_types(void) +{ + type_register_static(&piix3_ide_info); + type_register_static(&piix4_ide_info); +} + +type_init(piix_ide_register_types) |