hw/pci-host/uninorth.c - qemu - Git at Google

 /*
  * QEMU Uninorth PCI host (for all Mac99 and newer machines)
  *
  * 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/hw.h"
 #include "hw/ppc/mac.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_host.h"

 /* debug UniNorth */
 //#define DEBUG_UNIN

 #ifdef DEBUG_UNIN
 #define UNIN_DPRINTF(fmt, ...)                                  \
     do { printf("UNIN: " fmt , ## __VA_ARGS__); } while (0)
 #else
 #define UNIN_DPRINTF(fmt, ...)
 #endif

 static const int unin_irq_line[] = { 0x1b, 0x1c, 0x1d, 0x1e };

 #define TYPE_UNI_NORTH_PCI_HOST_BRIDGE "uni-north-pci-pcihost"
 #define TYPE_UNI_NORTH_AGP_HOST_BRIDGE "uni-north-agp-pcihost"
 #define TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE "uni-north-internal-pci-pcihost"
 #define TYPE_U3_AGP_HOST_BRIDGE "u3-agp-pcihost"

 #define UNI_NORTH_PCI_HOST_BRIDGE(obj) \
     OBJECT_CHECK(UNINState, (obj), TYPE_UNI_NORTH_PCI_HOST_BRIDGE)
 #define UNI_NORTH_AGP_HOST_BRIDGE(obj) \
     OBJECT_CHECK(UNINState, (obj), TYPE_UNI_NORTH_AGP_HOST_BRIDGE)
 #define UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE(obj) \
     OBJECT_CHECK(UNINState, (obj), TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE)
 #define U3_AGP_HOST_BRIDGE(obj) \
     OBJECT_CHECK(UNINState, (obj), TYPE_U3_AGP_HOST_BRIDGE)

 typedef struct UNINState {
     PCIHostState parent_obj;

     MemoryRegion pci_mmio;
     MemoryRegion pci_hole;
 } UNINState;

 static int pci_unin_map_irq(PCIDevice *pci_dev, int irq_num)
 {
     int retval;
     int devfn = pci_dev->devfn & 0x00FFFFFF;

     retval = (((devfn >> 11) & 0x1F) + irq_num) & 3;

     return retval;
 }

 static void pci_unin_set_irq(void *opaque, int irq_num, int level)
 {
     qemu_irq *pic = opaque;

     UNIN_DPRINTF("%s: setting INT %d = %d\n", __func__,
                  unin_irq_line[irq_num], level);
     qemu_set_irq(pic[unin_irq_line[irq_num]], level);
 }

 static uint32_t unin_get_config_reg(uint32_t reg, uint32_t addr)
 {
     uint32_t retval;

     if (reg & (1u << 31)) {
         /* XXX OpenBIOS compatibility hack */
         retval = reg | (addr & 3);
     } else if (reg & 1) {
         /* CFA1 style */
         retval = (reg & ~7u) | (addr & 7);
     } else {
         uint32_t slot, func;

         /* Grab CFA0 style values */
         slot = ctz32(reg & 0xfffff800);
         if (slot == 32) {
             slot = -1; /* XXX: should this be 0? */
         }
         func = (reg >> 8) & 7;

         /* ... and then convert them to x86 format */
         /* config pointer */
         retval = (reg & (0xff - 7)) | (addr & 7);
         /* slot */
         retval |= slot << 11;
         /* fn */
         retval |= func << 8;
     }


     UNIN_DPRINTF("Converted config space accessor %08x/%08x -> %08x\n",
                  reg, addr, retval);

     return retval;
 }

 static void unin_data_write(void *opaque, hwaddr addr,
                             uint64_t val, unsigned len)
 {
     UNINState *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
     UNIN_DPRINTF("write addr %" TARGET_FMT_plx " len %d val %"PRIx64"\n",
                  addr, len, val);
     pci_data_write(phb->bus,
                    unin_get_config_reg(phb->config_reg, addr),
                    val, len);
 }

 static uint64_t unin_data_read(void *opaque, hwaddr addr,
                                unsigned len)
 {
     UNINState *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
     uint32_t val;

     val = pci_data_read(phb->bus,
                         unin_get_config_reg(phb->config_reg, addr),
                         len);
     UNIN_DPRINTF("read addr %" TARGET_FMT_plx " len %d val %x\n",
                  addr, len, val);
     return val;
 }

 static const MemoryRegionOps unin_data_ops = {
     .read = unin_data_read,
     .write = unin_data_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 static int pci_unin_main_init_device(SysBusDevice *dev)
 {
     PCIHostState *h;

     /* Use values found on a real PowerMac */
     /* Uninorth main bus */
     h = PCI_HOST_BRIDGE(dev);

     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops,
                           dev, "pci-conf-idx", 0x1000);
     memory_region_init_io(&h->data_mem, OBJECT(h), &unin_data_ops, dev,
                           "pci-conf-data", 0x1000);
     sysbus_init_mmio(dev, &h->conf_mem);
     sysbus_init_mmio(dev, &h->data_mem);

     return 0;
 }


 static int pci_u3_agp_init_device(SysBusDevice *dev)
 {
     PCIHostState *h;

     /* Uninorth U3 AGP bus */
     h = PCI_HOST_BRIDGE(dev);

     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops,
                           dev, "pci-conf-idx", 0x1000);
     memory_region_init_io(&h->data_mem, OBJECT(h), &unin_data_ops, dev,
                           "pci-conf-data", 0x1000);
     sysbus_init_mmio(dev, &h->conf_mem);
     sysbus_init_mmio(dev, &h->data_mem);

     return 0;
 }

 static int pci_unin_agp_init_device(SysBusDevice *dev)
 {
     PCIHostState *h;

     /* Uninorth AGP bus */
     h = PCI_HOST_BRIDGE(dev);

     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops,
                           dev, "pci-conf-idx", 0x1000);
     memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops,
                           dev, "pci-conf-data", 0x1000);
     sysbus_init_mmio(dev, &h->conf_mem);
     sysbus_init_mmio(dev, &h->data_mem);
     return 0;
 }

 static int pci_unin_internal_init_device(SysBusDevice *dev)
 {
     PCIHostState *h;

     /* Uninorth internal bus */
     h = PCI_HOST_BRIDGE(dev);

     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops,
                           dev, "pci-conf-idx", 0x1000);
     memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops,
                           dev, "pci-conf-data", 0x1000);
     sysbus_init_mmio(dev, &h->conf_mem);
     sysbus_init_mmio(dev, &h->data_mem);
     return 0;
 }

 PCIBus *pci_pmac_init(qemu_irq *pic,
                       MemoryRegion *address_space_mem,
                       MemoryRegion *address_space_io)
 {
     DeviceState *dev;
     SysBusDevice *s;
     PCIHostState *h;
     UNINState *d;

     /* Use values found on a real PowerMac */
     /* Uninorth main bus */
     dev = qdev_create(NULL, TYPE_UNI_NORTH_PCI_HOST_BRIDGE);
     qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
     h = PCI_HOST_BRIDGE(s);
     d = UNI_NORTH_PCI_HOST_BRIDGE(dev);
     memory_region_init(&d->pci_mmio, OBJECT(d), "pci-mmio", 0x100000000ULL);
     memory_region_init_alias(&d->pci_hole, OBJECT(d), "pci-hole", &d->pci_mmio,
                              0x80000000ULL, 0x10000000ULL);
     memory_region_add_subregion(address_space_mem, 0x80000000ULL,
                                 &d->pci_hole);

     h->bus = pci_register_bus(dev, NULL,
                               pci_unin_set_irq, pci_unin_map_irq,
                               pic,
                               &d->pci_mmio,
                               address_space_io,
                               PCI_DEVFN(11, 0), 4, TYPE_PCI_BUS);

 #if 0
     pci_create_simple(h->bus, PCI_DEVFN(11, 0), "uni-north");
 #endif

     sysbus_mmio_map(s, 0, 0xf2800000);
     sysbus_mmio_map(s, 1, 0xf2c00000);

     /* DEC 21154 bridge */
 #if 0
     /* XXX: not activated as PPC BIOS doesn't handle multiple buses properly */
     pci_create_simple(h->bus, PCI_DEVFN(12, 0), "dec-21154");
 #endif

     /* Uninorth AGP bus */
     pci_create_simple(h->bus, PCI_DEVFN(11, 0), "uni-north-agp");
     dev = qdev_create(NULL, TYPE_UNI_NORTH_AGP_HOST_BRIDGE);
     qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
     sysbus_mmio_map(s, 0, 0xf0800000);
     sysbus_mmio_map(s, 1, 0xf0c00000);

     /* Uninorth internal bus */
 #if 0
     /* XXX: not needed for now */
     pci_create_simple(h->bus, PCI_DEVFN(14, 0),
                       "uni-north-internal-pci");
     dev = qdev_create(NULL, TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE);
     qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
     sysbus_mmio_map(s, 0, 0xf4800000);
     sysbus_mmio_map(s, 1, 0xf4c00000);
 #endif

     return h->bus;
 }

 PCIBus *pci_pmac_u3_init(qemu_irq *pic,
                          MemoryRegion *address_space_mem,
                          MemoryRegion *address_space_io)
 {
     DeviceState *dev;
     SysBusDevice *s;
     PCIHostState *h;
     UNINState *d;

     /* Uninorth AGP bus */

     dev = qdev_create(NULL, TYPE_U3_AGP_HOST_BRIDGE);
     qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
     h = PCI_HOST_BRIDGE(dev);
     d = U3_AGP_HOST_BRIDGE(dev);

     memory_region_init(&d->pci_mmio, OBJECT(d), "pci-mmio", 0x100000000ULL);
     memory_region_init_alias(&d->pci_hole, OBJECT(d), "pci-hole", &d->pci_mmio,
                              0x80000000ULL, 0x70000000ULL);
     memory_region_add_subregion(address_space_mem, 0x80000000ULL,
                                 &d->pci_hole);

     h->bus = pci_register_bus(dev, NULL,
                               pci_unin_set_irq, pci_unin_map_irq,
                               pic,
                               &d->pci_mmio,
                               address_space_io,
                               PCI_DEVFN(11, 0), 4, TYPE_PCI_BUS);

     sysbus_mmio_map(s, 0, 0xf0800000);
     sysbus_mmio_map(s, 1, 0xf0c00000);

     pci_create_simple(h->bus, 11 << 3, "u3-agp");

     return h->bus;
 }

 static void unin_main_pci_host_realize(PCIDevice *d, Error **errp)
 {
     d->config[0x0C] = 0x08; // cache_line_size
     d->config[0x0D] = 0x10; // latency_timer
     d->config[0x34] = 0x00; // capabilities_pointer
 }

 static void unin_agp_pci_host_realize(PCIDevice *d, Error **errp)
 {
     d->config[0x0C] = 0x08; // cache_line_size
     d->config[0x0D] = 0x10; // latency_timer
     //    d->config[0x34] = 0x80; // capabilities_pointer
 }

 static void u3_agp_pci_host_realize(PCIDevice *d, Error **errp)
 {
     /* cache line size */
     d->config[0x0C] = 0x08;
     /* latency timer */
     d->config[0x0D] = 0x10;
 }

 static void unin_internal_pci_host_realize(PCIDevice *d, Error **errp)
 {
     d->config[0x0C] = 0x08; // cache_line_size
     d->config[0x0D] = 0x10; // latency_timer
     d->config[0x34] = 0x00; // capabilities_pointer
 }

 static void unin_main_pci_host_class_init(ObjectClass *klass, void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     k->realize   = unin_main_pci_host_realize;
     k->vendor_id = PCI_VENDOR_ID_APPLE;
     k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_PCI;
     k->revision  = 0x00;
     k->class_id  = PCI_CLASS_BRIDGE_HOST;
     /*
      * PCI-facing part of the host bridge, not usable without the
      * host-facing part, which can't be device_add'ed, yet.
      */
     dc->cannot_instantiate_with_device_add_yet = true;
 }

 static const TypeInfo unin_main_pci_host_info = {
     .name = "uni-north-pci",
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = unin_main_pci_host_class_init,
 };

 static void u3_agp_pci_host_class_init(ObjectClass *klass, void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     k->realize   = u3_agp_pci_host_realize;
     k->vendor_id = PCI_VENDOR_ID_APPLE;
     k->device_id = PCI_DEVICE_ID_APPLE_U3_AGP;
     k->revision  = 0x00;
     k->class_id  = PCI_CLASS_BRIDGE_HOST;
     /*
      * PCI-facing part of the host bridge, not usable without the
      * host-facing part, which can't be device_add'ed, yet.
      */
     dc->cannot_instantiate_with_device_add_yet = true;
 }

 static const TypeInfo u3_agp_pci_host_info = {
     .name = "u3-agp",
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = u3_agp_pci_host_class_init,
 };

 static void unin_agp_pci_host_class_init(ObjectClass *klass, void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     k->realize   = unin_agp_pci_host_realize;
     k->vendor_id = PCI_VENDOR_ID_APPLE;
     k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP;
     k->revision  = 0x00;
     k->class_id  = PCI_CLASS_BRIDGE_HOST;
     /*
      * PCI-facing part of the host bridge, not usable without the
      * host-facing part, which can't be device_add'ed, yet.
      */
     dc->cannot_instantiate_with_device_add_yet = true;
 }

 static const TypeInfo unin_agp_pci_host_info = {
     .name = "uni-north-agp",
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = unin_agp_pci_host_class_init,
 };

 static void unin_internal_pci_host_class_init(ObjectClass *klass, void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     k->realize   = unin_internal_pci_host_realize;
     k->vendor_id = PCI_VENDOR_ID_APPLE;
     k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_I_PCI;
     k->revision  = 0x00;
     k->class_id  = PCI_CLASS_BRIDGE_HOST;
     /*
      * PCI-facing part of the host bridge, not usable without the
      * host-facing part, which can't be device_add'ed, yet.
      */
     dc->cannot_instantiate_with_device_add_yet = true;
 }

 static const TypeInfo unin_internal_pci_host_info = {
     .name = "uni-north-internal-pci",
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init = unin_internal_pci_host_class_init,
 };

 static void pci_unin_main_class_init(ObjectClass *klass, void *data)
 {
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     sbc->init = pci_unin_main_init_device;
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 }

 static const TypeInfo pci_unin_main_info = {
     .name          = TYPE_UNI_NORTH_PCI_HOST_BRIDGE,
     .parent        = TYPE_PCI_HOST_BRIDGE,
     .instance_size = sizeof(UNINState),
     .class_init    = pci_unin_main_class_init,
 };

 static void pci_u3_agp_class_init(ObjectClass *klass, void *data)
 {
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     sbc->init = pci_u3_agp_init_device;
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 }

 static const TypeInfo pci_u3_agp_info = {
     .name          = TYPE_U3_AGP_HOST_BRIDGE,
     .parent        = TYPE_PCI_HOST_BRIDGE,
     .instance_size = sizeof(UNINState),
     .class_init    = pci_u3_agp_class_init,
 };

 static void pci_unin_agp_class_init(ObjectClass *klass, void *data)
 {
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     sbc->init = pci_unin_agp_init_device;
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 }

 static const TypeInfo pci_unin_agp_info = {
     .name          = TYPE_UNI_NORTH_AGP_HOST_BRIDGE,
     .parent        = TYPE_PCI_HOST_BRIDGE,
     .instance_size = sizeof(UNINState),
     .class_init    = pci_unin_agp_class_init,
 };

 static void pci_unin_internal_class_init(ObjectClass *klass, void *data)
 {
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     sbc->init = pci_unin_internal_init_device;
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 }

 static const TypeInfo pci_unin_internal_info = {
     .name          = TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE,
     .parent        = TYPE_PCI_HOST_BRIDGE,
     .instance_size = sizeof(UNINState),
     .class_init    = pci_unin_internal_class_init,
 };

 static void unin_register_types(void)
 {
     type_register_static(&unin_main_pci_host_info);
     type_register_static(&u3_agp_pci_host_info);
     type_register_static(&unin_agp_pci_host_info);
     type_register_static(&unin_internal_pci_host_info);

     type_register_static(&pci_unin_main_info);
     type_register_static(&pci_u3_agp_info);
     type_register_static(&pci_unin_agp_info);
     type_register_static(&pci_unin_internal_info);
 }

 type_init(unin_register_types)
	/*
	* QEMU Uninorth PCI host (for all Mac99 and newer machines)
	*
	* 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/hw.h"
	#include "hw/ppc/mac.h"
	#include "hw/pci/pci.h"
	#include "hw/pci/pci_host.h"

	/* debug UniNorth */
	//#define DEBUG_UNIN

	#ifdef DEBUG_UNIN
	#define UNIN_DPRINTF(fmt, ...) \
	do { printf("UNIN: " fmt , ## __VA_ARGS__); } while (0)
	#else
	#define UNIN_DPRINTF(fmt, ...)
	#endif

	static const int unin_irq_line[] = { 0x1b, 0x1c, 0x1d, 0x1e };

	#define TYPE_UNI_NORTH_PCI_HOST_BRIDGE "uni-north-pci-pcihost"
	#define TYPE_UNI_NORTH_AGP_HOST_BRIDGE "uni-north-agp-pcihost"
	#define TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE "uni-north-internal-pci-pcihost"
	#define TYPE_U3_AGP_HOST_BRIDGE "u3-agp-pcihost"

	#define UNI_NORTH_PCI_HOST_BRIDGE(obj) \
	OBJECT_CHECK(UNINState, (obj), TYPE_UNI_NORTH_PCI_HOST_BRIDGE)
	#define UNI_NORTH_AGP_HOST_BRIDGE(obj) \
	OBJECT_CHECK(UNINState, (obj), TYPE_UNI_NORTH_AGP_HOST_BRIDGE)
	#define UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE(obj) \
	OBJECT_CHECK(UNINState, (obj), TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE)
	#define U3_AGP_HOST_BRIDGE(obj) \
	OBJECT_CHECK(UNINState, (obj), TYPE_U3_AGP_HOST_BRIDGE)

	typedef struct UNINState {
	PCIHostState parent_obj;

	MemoryRegion pci_mmio;
	MemoryRegion pci_hole;
	} UNINState;

	static int pci_unin_map_irq(PCIDevice *pci_dev, int irq_num)
	{
	int retval;
	int devfn = pci_dev->devfn & 0x00FFFFFF;

	retval = (((devfn >> 11) & 0x1F) + irq_num) & 3;

	return retval;
	}

	static void pci_unin_set_irq(void *opaque, int irq_num, int level)
	{
	qemu_irq *pic = opaque;

	UNIN_DPRINTF("%s: setting INT %d = %d\n", __func__,
	unin_irq_line[irq_num], level);
	qemu_set_irq(pic[unin_irq_line[irq_num]], level);
	}

	static uint32_t unin_get_config_reg(uint32_t reg, uint32_t addr)
	{
	uint32_t retval;

	if (reg & (1u << 31)) {
	/* XXX OpenBIOS compatibility hack */
	retval = reg \| (addr & 3);
	} else if (reg & 1) {
	/* CFA1 style */
	retval = (reg & ~7u) \| (addr & 7);
	} else {
	uint32_t slot, func;

	/* Grab CFA0 style values */
	slot = ctz32(reg & 0xfffff800);
	if (slot == 32) {
	slot = -1; /* XXX: should this be 0? */
	}
	func = (reg >> 8) & 7;

	/* ... and then convert them to x86 format */
	/* config pointer */
	retval = (reg & (0xff - 7)) \| (addr & 7);
	/* slot */
	retval \|= slot << 11;
	/* fn */
	retval \|= func << 8;
	}


	UNIN_DPRINTF("Converted config space accessor %08x/%08x -> %08x\n",
	reg, addr, retval);

	return retval;
	}

	static void unin_data_write(void *opaque, hwaddr addr,
	uint64_t val, unsigned len)
	{
	UNINState *s = opaque;
	PCIHostState *phb = PCI_HOST_BRIDGE(s);
	UNIN_DPRINTF("write addr %" TARGET_FMT_plx " len %d val %"PRIx64"\n",
	addr, len, val);
	pci_data_write(phb->bus,
	unin_get_config_reg(phb->config_reg, addr),
	val, len);
	}

	static uint64_t unin_data_read(void *opaque, hwaddr addr,
	unsigned len)
	{
	UNINState *s = opaque;
	PCIHostState *phb = PCI_HOST_BRIDGE(s);
	uint32_t val;

	val = pci_data_read(phb->bus,
	unin_get_config_reg(phb->config_reg, addr),
	len);
	UNIN_DPRINTF("read addr %" TARGET_FMT_plx " len %d val %x\n",
	addr, len, val);
	return val;
	}

	static const MemoryRegionOps unin_data_ops = {
	.read = unin_data_read,
	.write = unin_data_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	static int pci_unin_main_init_device(SysBusDevice *dev)
	{
	PCIHostState *h;

	/* Use values found on a real PowerMac */
	/* Uninorth main bus */
	h = PCI_HOST_BRIDGE(dev);

	memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops,
	dev, "pci-conf-idx", 0x1000);
	memory_region_init_io(&h->data_mem, OBJECT(h), &unin_data_ops, dev,
	"pci-conf-data", 0x1000);
	sysbus_init_mmio(dev, &h->conf_mem);
	sysbus_init_mmio(dev, &h->data_mem);

	return 0;
	}


	static int pci_u3_agp_init_device(SysBusDevice *dev)
	{
	PCIHostState *h;

	/* Uninorth U3 AGP bus */
	h = PCI_HOST_BRIDGE(dev);

	memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops,
	dev, "pci-conf-idx", 0x1000);
	memory_region_init_io(&h->data_mem, OBJECT(h), &unin_data_ops, dev,
	"pci-conf-data", 0x1000);
	sysbus_init_mmio(dev, &h->conf_mem);
	sysbus_init_mmio(dev, &h->data_mem);

	return 0;
	}

	static int pci_unin_agp_init_device(SysBusDevice *dev)
	{
	PCIHostState *h;

	/* Uninorth AGP bus */
	h = PCI_HOST_BRIDGE(dev);

	memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops,
	dev, "pci-conf-idx", 0x1000);
	memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops,
	dev, "pci-conf-data", 0x1000);
	sysbus_init_mmio(dev, &h->conf_mem);
	sysbus_init_mmio(dev, &h->data_mem);
	return 0;
	}

	static int pci_unin_internal_init_device(SysBusDevice *dev)
	{
	PCIHostState *h;

	/* Uninorth internal bus */
	h = PCI_HOST_BRIDGE(dev);

	memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops,
	dev, "pci-conf-idx", 0x1000);
	memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops,
	dev, "pci-conf-data", 0x1000);
	sysbus_init_mmio(dev, &h->conf_mem);
	sysbus_init_mmio(dev, &h->data_mem);
	return 0;
	}

	PCIBus pci_pmac_init(qemu_irq pic,
	MemoryRegion *address_space_mem,
	MemoryRegion *address_space_io)
	{
	DeviceState *dev;
	SysBusDevice *s;
	PCIHostState *h;
	UNINState *d;

	/* Use values found on a real PowerMac */
	/* Uninorth main bus */
	dev = qdev_create(NULL, TYPE_UNI_NORTH_PCI_HOST_BRIDGE);
	qdev_init_nofail(dev);
	s = SYS_BUS_DEVICE(dev);
	h = PCI_HOST_BRIDGE(s);
	d = UNI_NORTH_PCI_HOST_BRIDGE(dev);
	memory_region_init(&d->pci_mmio, OBJECT(d), "pci-mmio", 0x100000000ULL);
	memory_region_init_alias(&d->pci_hole, OBJECT(d), "pci-hole", &d->pci_mmio,
	0x80000000ULL, 0x10000000ULL);
	memory_region_add_subregion(address_space_mem, 0x80000000ULL,
	&d->pci_hole);

	h->bus = pci_register_bus(dev, NULL,
	pci_unin_set_irq, pci_unin_map_irq,
	pic,
	&d->pci_mmio,
	address_space_io,
	PCI_DEVFN(11, 0), 4, TYPE_PCI_BUS);

	#if 0
	pci_create_simple(h->bus, PCI_DEVFN(11, 0), "uni-north");
	#endif

	sysbus_mmio_map(s, 0, 0xf2800000);
	sysbus_mmio_map(s, 1, 0xf2c00000);

	/* DEC 21154 bridge */
	#if 0
	/* XXX: not activated as PPC BIOS doesn't handle multiple buses properly */
	pci_create_simple(h->bus, PCI_DEVFN(12, 0), "dec-21154");
	#endif

	/* Uninorth AGP bus */
	pci_create_simple(h->bus, PCI_DEVFN(11, 0), "uni-north-agp");
	dev = qdev_create(NULL, TYPE_UNI_NORTH_AGP_HOST_BRIDGE);
	qdev_init_nofail(dev);
	s = SYS_BUS_DEVICE(dev);
	sysbus_mmio_map(s, 0, 0xf0800000);
	sysbus_mmio_map(s, 1, 0xf0c00000);

	/* Uninorth internal bus */
	#if 0
	/* XXX: not needed for now */
	pci_create_simple(h->bus, PCI_DEVFN(14, 0),
	"uni-north-internal-pci");
	dev = qdev_create(NULL, TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE);
	qdev_init_nofail(dev);
	s = SYS_BUS_DEVICE(dev);
	sysbus_mmio_map(s, 0, 0xf4800000);
	sysbus_mmio_map(s, 1, 0xf4c00000);
	#endif

	return h->bus;
	}

	PCIBus pci_pmac_u3_init(qemu_irq pic,
	MemoryRegion *address_space_mem,
	MemoryRegion *address_space_io)
	{
	DeviceState *dev;
	SysBusDevice *s;
	PCIHostState *h;
	UNINState *d;

	/* Uninorth AGP bus */

	dev = qdev_create(NULL, TYPE_U3_AGP_HOST_BRIDGE);
	qdev_init_nofail(dev);
	s = SYS_BUS_DEVICE(dev);
	h = PCI_HOST_BRIDGE(dev);
	d = U3_AGP_HOST_BRIDGE(dev);

	memory_region_init(&d->pci_mmio, OBJECT(d), "pci-mmio", 0x100000000ULL);
	memory_region_init_alias(&d->pci_hole, OBJECT(d), "pci-hole", &d->pci_mmio,
	0x80000000ULL, 0x70000000ULL);
	memory_region_add_subregion(address_space_mem, 0x80000000ULL,
	&d->pci_hole);

	h->bus = pci_register_bus(dev, NULL,
	pci_unin_set_irq, pci_unin_map_irq,
	pic,
	&d->pci_mmio,
	address_space_io,
	PCI_DEVFN(11, 0), 4, TYPE_PCI_BUS);

	sysbus_mmio_map(s, 0, 0xf0800000);
	sysbus_mmio_map(s, 1, 0xf0c00000);

	pci_create_simple(h->bus, 11 << 3, "u3-agp");

	return h->bus;
	}

	static void unin_main_pci_host_realize(PCIDevice d, Error *errp)
	{
	d->config[0x0C] = 0x08; // cache_line_size
	d->config[0x0D] = 0x10; // latency_timer
	d->config[0x34] = 0x00; // capabilities_pointer
	}

	static void unin_agp_pci_host_realize(PCIDevice d, Error *errp)
	{
	d->config[0x0C] = 0x08; // cache_line_size
	d->config[0x0D] = 0x10; // latency_timer
	// d->config[0x34] = 0x80; // capabilities_pointer
	}

	static void u3_agp_pci_host_realize(PCIDevice d, Error *errp)
	{
	/* cache line size */
	d->config[0x0C] = 0x08;
	/* latency timer */
	d->config[0x0D] = 0x10;
	}

	static void unin_internal_pci_host_realize(PCIDevice d, Error *errp)
	{
	d->config[0x0C] = 0x08; // cache_line_size
	d->config[0x0D] = 0x10; // latency_timer
	d->config[0x34] = 0x00; // capabilities_pointer
	}

	static void unin_main_pci_host_class_init(ObjectClass klass, void data)
	{
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	k->realize = unin_main_pci_host_realize;
	k->vendor_id = PCI_VENDOR_ID_APPLE;
	k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_PCI;
	k->revision = 0x00;
	k->class_id = PCI_CLASS_BRIDGE_HOST;
	/*
	* PCI-facing part of the host bridge, not usable without the
	* host-facing part, which can't be device_add'ed, yet.
	*/
	dc->cannot_instantiate_with_device_add_yet = true;
	}

	static const TypeInfo unin_main_pci_host_info = {
	.name = "uni-north-pci",
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCIDevice),
	.class_init = unin_main_pci_host_class_init,
	};

	static void u3_agp_pci_host_class_init(ObjectClass klass, void data)
	{
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	k->realize = u3_agp_pci_host_realize;
	k->vendor_id = PCI_VENDOR_ID_APPLE;
	k->device_id = PCI_DEVICE_ID_APPLE_U3_AGP;
	k->revision = 0x00;
	k->class_id = PCI_CLASS_BRIDGE_HOST;
	/*
	* PCI-facing part of the host bridge, not usable without the
	* host-facing part, which can't be device_add'ed, yet.
	*/
	dc->cannot_instantiate_with_device_add_yet = true;
	}

	static const TypeInfo u3_agp_pci_host_info = {
	.name = "u3-agp",
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCIDevice),
	.class_init = u3_agp_pci_host_class_init,
	};

	static void unin_agp_pci_host_class_init(ObjectClass klass, void data)
	{
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	k->realize = unin_agp_pci_host_realize;
	k->vendor_id = PCI_VENDOR_ID_APPLE;
	k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP;
	k->revision = 0x00;
	k->class_id = PCI_CLASS_BRIDGE_HOST;
	/*
	* PCI-facing part of the host bridge, not usable without the
	* host-facing part, which can't be device_add'ed, yet.
	*/
	dc->cannot_instantiate_with_device_add_yet = true;
	}

	static const TypeInfo unin_agp_pci_host_info = {
	.name = "uni-north-agp",
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCIDevice),
	.class_init = unin_agp_pci_host_class_init,
	};

	static void unin_internal_pci_host_class_init(ObjectClass klass, void data)
	{
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	k->realize = unin_internal_pci_host_realize;
	k->vendor_id = PCI_VENDOR_ID_APPLE;
	k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_I_PCI;
	k->revision = 0x00;
	k->class_id = PCI_CLASS_BRIDGE_HOST;
	/*
	* PCI-facing part of the host bridge, not usable without the
	* host-facing part, which can't be device_add'ed, yet.
	*/
	dc->cannot_instantiate_with_device_add_yet = true;
	}

	static const TypeInfo unin_internal_pci_host_info = {
	.name = "uni-north-internal-pci",
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCIDevice),
	.class_init = unin_internal_pci_host_class_init,
	};

	static void pci_unin_main_class_init(ObjectClass klass, void data)
	{
	SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	sbc->init = pci_unin_main_init_device;
	set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
	}

	static const TypeInfo pci_unin_main_info = {
	.name = TYPE_UNI_NORTH_PCI_HOST_BRIDGE,
	.parent = TYPE_PCI_HOST_BRIDGE,
	.instance_size = sizeof(UNINState),
	.class_init = pci_unin_main_class_init,
	};

	static void pci_u3_agp_class_init(ObjectClass klass, void data)
	{
	SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	sbc->init = pci_u3_agp_init_device;
	set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
	}

	static const TypeInfo pci_u3_agp_info = {
	.name = TYPE_U3_AGP_HOST_BRIDGE,
	.parent = TYPE_PCI_HOST_BRIDGE,
	.instance_size = sizeof(UNINState),
	.class_init = pci_u3_agp_class_init,
	};

	static void pci_unin_agp_class_init(ObjectClass klass, void data)
	{
	SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	sbc->init = pci_unin_agp_init_device;
	set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
	}

	static const TypeInfo pci_unin_agp_info = {
	.name = TYPE_UNI_NORTH_AGP_HOST_BRIDGE,
	.parent = TYPE_PCI_HOST_BRIDGE,
	.instance_size = sizeof(UNINState),
	.class_init = pci_unin_agp_class_init,
	};

	static void pci_unin_internal_class_init(ObjectClass klass, void data)
	{
	SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	sbc->init = pci_unin_internal_init_device;
	set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
	}

	static const TypeInfo pci_unin_internal_info = {
	.name = TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE,
	.parent = TYPE_PCI_HOST_BRIDGE,
	.instance_size = sizeof(UNINState),
	.class_init = pci_unin_internal_class_init,
	};

	static void unin_register_types(void)
	{
	type_register_static(&unin_main_pci_host_info);
	type_register_static(&u3_agp_pci_host_info);
	type_register_static(&unin_agp_pci_host_info);
	type_register_static(&unin_internal_pci_host_info);

	type_register_static(&pci_unin_main_info);
	type_register_static(&pci_u3_agp_info);
	type_register_static(&pci_unin_agp_info);
	type_register_static(&pci_unin_internal_info);
	}

	type_init(unin_register_types)