AIX/PReP does access to the aliased IO registers of 53810. Implement aliasing to make the AIX driver work.
Signed-off-by: Artyom Tarasenko <atar4q...@gmail.com> --- hw/scsi/lsi53c895a.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c index da7239d..6b95699 100644 --- a/hw/scsi/lsi53c895a.c +++ b/hw/scsi/lsi53c895a.c @@ -2271,6 +2271,9 @@ static void lsi_scsi_realize(PCIDevice *dev, Error **errp) LSIState *s = LSI53C895A(dev); DeviceState *d = DEVICE(dev); uint8_t *pci_conf; + uint64_t mmio_size; + MemoryRegion *mr; + uint16_t type = PCI_DEVICE_GET_CLASS(dev)->device_id; pci_conf = dev->config; @@ -2279,13 +2282,21 @@ static void lsi_scsi_realize(PCIDevice *dev, Error **errp) /* Interrupt pin A */ pci_conf[PCI_INTERRUPT_PIN] = 0x01; - memory_region_init_io(&s->mmio_io, OBJECT(s), &lsi_mmio_ops, s, - "lsi-mmio", 0x400); memory_region_init_io(&s->ram_io, OBJECT(s), &lsi_ram_ops, s, "lsi-ram", 0x2000); memory_region_init_io(&s->io_io, OBJECT(s), &lsi_io_ops, s, "lsi-io", 256); - + if (type == PCI_DEVICE_ID_LSI_53C895A) { + mmio_size = 0x400; + } else { + mr = g_new(MemoryRegion, 1); + memory_region_init_alias(mr, OBJECT(d), "lsi-io-alias", &s->io_io, + 0, 0x80); + memory_region_add_subregion_overlap(&s->io_io, 0x80, mr, -1); + mmio_size = 0x80; + } + memory_region_init_io(&s->mmio_io, OBJECT(s), &lsi_mmio_ops, s, + "lsi-mmio", mmio_size); address_space_init(&s->pci_io_as, pci_address_space_io(dev), "lsi-pci-io"); qdev_init_gpio_out(d, &s->ext_irq, 1); -- 2.7.2