hw/ppc/ppc4xx_pci.c - qemu - Git at Google

 /*
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License, version 2, as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  *
  * Copyright IBM Corp. 2008
  *
  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  */

 /* This file implements emulation of the 32-bit PCI controller found in some
  * 4xx SoCs, such as the 440EP. */

 #include "qemu/osdep.h"
 #include "hw/hw.h"
 #include "hw/ppc/ppc.h"
 #include "hw/ppc/ppc4xx.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_host.h"
 #include "exec/address-spaces.h"

 #undef DEBUG
 #ifdef DEBUG
 #define DPRINTF(fmt, ...) do { printf(fmt, ## __VA_ARGS__); } while (0)
 #else
 #define DPRINTF(fmt, ...)
 #endif /* DEBUG */

 struct PCIMasterMap {
     uint32_t la;
     uint32_t ma;
     uint32_t pcila;
     uint32_t pciha;
 };

 struct PCITargetMap {
     uint32_t ms;
     uint32_t la;
 };

 #define PPC4xx_PCI_HOST_BRIDGE(obj) \
     OBJECT_CHECK(PPC4xxPCIState, (obj), TYPE_PPC4xx_PCI_HOST_BRIDGE)

 #define PPC4xx_PCI_NR_PMMS 3
 #define PPC4xx_PCI_NR_PTMS 2

 struct PPC4xxPCIState {
     PCIHostState parent_obj;

     struct PCIMasterMap pmm[PPC4xx_PCI_NR_PMMS];
     struct PCITargetMap ptm[PPC4xx_PCI_NR_PTMS];
     qemu_irq irq[4];

     MemoryRegion container;
     MemoryRegion iomem;
 };
 typedef struct PPC4xxPCIState PPC4xxPCIState;

 #define PCIC0_CFGADDR       0x0
 #define PCIC0_CFGDATA       0x4

 /* PLB Memory Map (PMM) registers specify which PLB addresses are translated to
  * PCI accesses. */
 #define PCIL0_PMM0LA        0x0
 #define PCIL0_PMM0MA        0x4
 #define PCIL0_PMM0PCILA     0x8
 #define PCIL0_PMM0PCIHA     0xc
 #define PCIL0_PMM1LA        0x10
 #define PCIL0_PMM1MA        0x14
 #define PCIL0_PMM1PCILA     0x18
 #define PCIL0_PMM1PCIHA     0x1c
 #define PCIL0_PMM2LA        0x20
 #define PCIL0_PMM2MA        0x24
 #define PCIL0_PMM2PCILA     0x28
 #define PCIL0_PMM2PCIHA     0x2c

 /* PCI Target Map (PTM) registers specify which PCI addresses are translated to
  * PLB accesses. */
 #define PCIL0_PTM1MS        0x30
 #define PCIL0_PTM1LA        0x34
 #define PCIL0_PTM2MS        0x38
 #define PCIL0_PTM2LA        0x3c
 #define PCI_REG_BASE        0x800000
 #define PCI_REG_SIZE        0x40

 #define PCI_ALL_SIZE        (PCI_REG_BASE + PCI_REG_SIZE)

 static void ppc4xx_pci_reg_write4(void *opaque, hwaddr offset,
                                   uint64_t value, unsigned size)
 {
     struct PPC4xxPCIState *pci = opaque;

     /* We ignore all target attempts at PCI configuration, effectively
      * assuming a bidirectional 1:1 mapping of PLB and PCI space. */

     switch (offset) {
     case PCIL0_PMM0LA:
         pci->pmm[0].la = value;
         break;
     case PCIL0_PMM0MA:
         pci->pmm[0].ma = value;
         break;
     case PCIL0_PMM0PCIHA:
         pci->pmm[0].pciha = value;
         break;
     case PCIL0_PMM0PCILA:
         pci->pmm[0].pcila = value;
         break;

     case PCIL0_PMM1LA:
         pci->pmm[1].la = value;
         break;
     case PCIL0_PMM1MA:
         pci->pmm[1].ma = value;
         break;
     case PCIL0_PMM1PCIHA:
         pci->pmm[1].pciha = value;
         break;
     case PCIL0_PMM1PCILA:
         pci->pmm[1].pcila = value;
         break;

     case PCIL0_PMM2LA:
         pci->pmm[2].la = value;
         break;
     case PCIL0_PMM2MA:
         pci->pmm[2].ma = value;
         break;
     case PCIL0_PMM2PCIHA:
         pci->pmm[2].pciha = value;
         break;
     case PCIL0_PMM2PCILA:
         pci->pmm[2].pcila = value;
         break;

     case PCIL0_PTM1MS:
         pci->ptm[0].ms = value;
         break;
     case PCIL0_PTM1LA:
         pci->ptm[0].la = value;
         break;
     case PCIL0_PTM2MS:
         pci->ptm[1].ms = value;
         break;
     case PCIL0_PTM2LA:
         pci->ptm[1].la = value;
         break;

     default:
         printf("%s: unhandled PCI internal register 0x%lx\n", __func__,
                (unsigned long)offset);
         break;
     }
 }

 static uint64_t ppc4xx_pci_reg_read4(void *opaque, hwaddr offset,
                                      unsigned size)
 {
     struct PPC4xxPCIState *pci = opaque;
     uint32_t value;

     switch (offset) {
     case PCIL0_PMM0LA:
         value = pci->pmm[0].la;
         break;
     case PCIL0_PMM0MA:
         value = pci->pmm[0].ma;
         break;
     case PCIL0_PMM0PCIHA:
         value = pci->pmm[0].pciha;
         break;
     case PCIL0_PMM0PCILA:
         value = pci->pmm[0].pcila;
         break;

     case PCIL0_PMM1LA:
         value = pci->pmm[1].la;
         break;
     case PCIL0_PMM1MA:
         value = pci->pmm[1].ma;
         break;
     case PCIL0_PMM1PCIHA:
         value = pci->pmm[1].pciha;
         break;
     case PCIL0_PMM1PCILA:
         value = pci->pmm[1].pcila;
         break;

     case PCIL0_PMM2LA:
         value = pci->pmm[2].la;
         break;
     case PCIL0_PMM2MA:
         value = pci->pmm[2].ma;
         break;
     case PCIL0_PMM2PCIHA:
         value = pci->pmm[2].pciha;
         break;
     case PCIL0_PMM2PCILA:
         value = pci->pmm[2].pcila;
         break;

     case PCIL0_PTM1MS:
         value = pci->ptm[0].ms;
         break;
     case PCIL0_PTM1LA:
         value = pci->ptm[0].la;
         break;
     case PCIL0_PTM2MS:
         value = pci->ptm[1].ms;
         break;
     case PCIL0_PTM2LA:
         value = pci->ptm[1].la;
         break;

     default:
         printf("%s: invalid PCI internal register 0x%lx\n", __func__,
                (unsigned long)offset);
         value = 0;
     }

     return value;
 }

 static const MemoryRegionOps pci_reg_ops = {
     .read = ppc4xx_pci_reg_read4,
     .write = ppc4xx_pci_reg_write4,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 static void ppc4xx_pci_reset(void *opaque)
 {
     struct PPC4xxPCIState *pci = opaque;

     memset(pci->pmm, 0, sizeof(pci->pmm));
     memset(pci->ptm, 0, sizeof(pci->ptm));
 }

 /* On Bamboo, all pins from each slot are tied to a single board IRQ. This
  * may need further refactoring for other boards. */
 static int ppc4xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 {
     int slot = pci_dev->devfn >> 3;

     DPRINTF("%s: devfn %x irq %d -> %d\n", __func__,
             pci_dev->devfn, irq_num, slot);

     return slot - 1;
 }

 static void ppc4xx_pci_set_irq(void *opaque, int irq_num, int level)
 {
     qemu_irq *pci_irqs = opaque;

     DPRINTF("%s: PCI irq %d\n", __func__, irq_num);
     if (irq_num < 0) {
         fprintf(stderr, "%s: PCI irq %d\n", __func__, irq_num);
         return;
     }
     qemu_set_irq(pci_irqs[irq_num], level);
 }

 static const VMStateDescription vmstate_pci_master_map = {
     .name = "pci_master_map",
     .version_id = 0,
     .minimum_version_id = 0,
     .fields = (VMStateField[]) {
         VMSTATE_UINT32(la, struct PCIMasterMap),
         VMSTATE_UINT32(ma, struct PCIMasterMap),
         VMSTATE_UINT32(pcila, struct PCIMasterMap),
         VMSTATE_UINT32(pciha, struct PCIMasterMap),
         VMSTATE_END_OF_LIST()
     }
 };

 static const VMStateDescription vmstate_pci_target_map = {
     .name = "pci_target_map",
     .version_id = 0,
     .minimum_version_id = 0,
     .fields = (VMStateField[]) {
         VMSTATE_UINT32(ms, struct PCITargetMap),
         VMSTATE_UINT32(la, struct PCITargetMap),
         VMSTATE_END_OF_LIST()
     }
 };

 static const VMStateDescription vmstate_ppc4xx_pci = {
     .name = "ppc4xx_pci",
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
         VMSTATE_STRUCT_ARRAY(pmm, PPC4xxPCIState, PPC4xx_PCI_NR_PMMS, 1,
                              vmstate_pci_master_map,
                              struct PCIMasterMap),
         VMSTATE_STRUCT_ARRAY(ptm, PPC4xxPCIState, PPC4xx_PCI_NR_PTMS, 1,
                              vmstate_pci_target_map,
                              struct PCITargetMap),
         VMSTATE_END_OF_LIST()
     }
 };

 /* XXX Interrupt acknowledge cycles not supported. */
 static int ppc4xx_pcihost_initfn(SysBusDevice *dev)
 {
     PPC4xxPCIState *s;
     PCIHostState *h;
     PCIBus *b;
     int i;

     h = PCI_HOST_BRIDGE(dev);
     s = PPC4xx_PCI_HOST_BRIDGE(dev);

     for (i = 0; i < ARRAY_SIZE(s->irq); i++) {
         sysbus_init_irq(dev, &s->irq[i]);
     }

     b = pci_register_bus(DEVICE(dev), NULL, ppc4xx_pci_set_irq,
                          ppc4xx_pci_map_irq, s->irq, get_system_memory(),
                          get_system_io(), 0, 4, TYPE_PCI_BUS);
     h->bus = b;

     pci_create_simple(b, 0, "ppc4xx-host-bridge");

     /* XXX split into 2 memory regions, one for config space, one for regs */
     memory_region_init(&s->container, OBJECT(s), "pci-container", PCI_ALL_SIZE);
     memory_region_init_io(&h->conf_mem, OBJECT(s), &pci_host_conf_le_ops, h,
                           "pci-conf-idx", 4);
     memory_region_init_io(&h->data_mem, OBJECT(s), &pci_host_data_le_ops, h,
                           "pci-conf-data", 4);
     memory_region_init_io(&s->iomem, OBJECT(s), &pci_reg_ops, s,
                           "pci.reg", PCI_REG_SIZE);
     memory_region_add_subregion(&s->container, PCIC0_CFGADDR, &h->conf_mem);
     memory_region_add_subregion(&s->container, PCIC0_CFGDATA, &h->data_mem);
     memory_region_add_subregion(&s->container, PCI_REG_BASE, &s->iomem);
     sysbus_init_mmio(dev, &s->container);
     qemu_register_reset(ppc4xx_pci_reset, s);

     return 0;
 }

 static void ppc4xx_host_bridge_class_init(ObjectClass *klass, void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     dc->desc        = "Host bridge";
     k->vendor_id    = PCI_VENDOR_ID_IBM;
     k->device_id    = PCI_DEVICE_ID_IBM_440GX;
     k->class_id     = PCI_CLASS_BRIDGE_OTHER;
     /*
      * 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 ppc4xx_host_bridge_info = {
     .name          = "ppc4xx-host-bridge",
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIDevice),
     .class_init    = ppc4xx_host_bridge_class_init,
 };

 static void ppc4xx_pcihost_class_init(ObjectClass *klass, void *data)
 {
     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     k->init = ppc4xx_pcihost_initfn;
     dc->vmsd = &vmstate_ppc4xx_pci;
 }

 static const TypeInfo ppc4xx_pcihost_info = {
     .name          = TYPE_PPC4xx_PCI_HOST_BRIDGE,
     .parent        = TYPE_PCI_HOST_BRIDGE,
     .instance_size = sizeof(PPC4xxPCIState),
     .class_init    = ppc4xx_pcihost_class_init,
 };

 static void ppc4xx_pci_register_types(void)
 {
     type_register_static(&ppc4xx_pcihost_info);
     type_register_static(&ppc4xx_host_bridge_info);
 }

 type_init(ppc4xx_pci_register_types)
	/*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License, version 2, as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	*
	* Copyright IBM Corp. 2008
	*
	* Authors: Hollis Blanchard <hollisb@us.ibm.com>
	*/

	/* This file implements emulation of the 32-bit PCI controller found in some
	* 4xx SoCs, such as the 440EP. */

	#include "qemu/osdep.h"
	#include "hw/hw.h"
	#include "hw/ppc/ppc.h"
	#include "hw/ppc/ppc4xx.h"
	#include "hw/pci/pci.h"
	#include "hw/pci/pci_host.h"
	#include "exec/address-spaces.h"

	#undef DEBUG
	#ifdef DEBUG
	#define DPRINTF(fmt, ...) do { printf(fmt, ## __VA_ARGS__); } while (0)
	#else
	#define DPRINTF(fmt, ...)
	#endif /* DEBUG */

	struct PCIMasterMap {
	uint32_t la;
	uint32_t ma;
	uint32_t pcila;
	uint32_t pciha;
	};

	struct PCITargetMap {
	uint32_t ms;
	uint32_t la;
	};

	#define PPC4xx_PCI_HOST_BRIDGE(obj) \
	OBJECT_CHECK(PPC4xxPCIState, (obj), TYPE_PPC4xx_PCI_HOST_BRIDGE)

	#define PPC4xx_PCI_NR_PMMS 3
	#define PPC4xx_PCI_NR_PTMS 2

	struct PPC4xxPCIState {
	PCIHostState parent_obj;

	struct PCIMasterMap pmm[PPC4xx_PCI_NR_PMMS];
	struct PCITargetMap ptm[PPC4xx_PCI_NR_PTMS];
	qemu_irq irq[4];

	MemoryRegion container;
	MemoryRegion iomem;
	};
	typedef struct PPC4xxPCIState PPC4xxPCIState;

	#define PCIC0_CFGADDR 0x0
	#define PCIC0_CFGDATA 0x4

	/* PLB Memory Map (PMM) registers specify which PLB addresses are translated to
	* PCI accesses. */
	#define PCIL0_PMM0LA 0x0
	#define PCIL0_PMM0MA 0x4
	#define PCIL0_PMM0PCILA 0x8
	#define PCIL0_PMM0PCIHA 0xc
	#define PCIL0_PMM1LA 0x10
	#define PCIL0_PMM1MA 0x14
	#define PCIL0_PMM1PCILA 0x18
	#define PCIL0_PMM1PCIHA 0x1c
	#define PCIL0_PMM2LA 0x20
	#define PCIL0_PMM2MA 0x24
	#define PCIL0_PMM2PCILA 0x28
	#define PCIL0_PMM2PCIHA 0x2c

	/* PCI Target Map (PTM) registers specify which PCI addresses are translated to
	* PLB accesses. */
	#define PCIL0_PTM1MS 0x30
	#define PCIL0_PTM1LA 0x34
	#define PCIL0_PTM2MS 0x38
	#define PCIL0_PTM2LA 0x3c
	#define PCI_REG_BASE 0x800000
	#define PCI_REG_SIZE 0x40

	#define PCI_ALL_SIZE (PCI_REG_BASE + PCI_REG_SIZE)

	static void ppc4xx_pci_reg_write4(void *opaque, hwaddr offset,
	uint64_t value, unsigned size)
	{
	struct PPC4xxPCIState *pci = opaque;

	/* We ignore all target attempts at PCI configuration, effectively
	* assuming a bidirectional 1:1 mapping of PLB and PCI space. */

	switch (offset) {
	case PCIL0_PMM0LA:
	pci->pmm[0].la = value;
	break;
	case PCIL0_PMM0MA:
	pci->pmm[0].ma = value;
	break;
	case PCIL0_PMM0PCIHA:
	pci->pmm[0].pciha = value;
	break;
	case PCIL0_PMM0PCILA:
	pci->pmm[0].pcila = value;
	break;

	case PCIL0_PMM1LA:
	pci->pmm[1].la = value;
	break;
	case PCIL0_PMM1MA:
	pci->pmm[1].ma = value;
	break;
	case PCIL0_PMM1PCIHA:
	pci->pmm[1].pciha = value;
	break;
	case PCIL0_PMM1PCILA:
	pci->pmm[1].pcila = value;
	break;

	case PCIL0_PMM2LA:
	pci->pmm[2].la = value;
	break;
	case PCIL0_PMM2MA:
	pci->pmm[2].ma = value;
	break;
	case PCIL0_PMM2PCIHA:
	pci->pmm[2].pciha = value;
	break;
	case PCIL0_PMM2PCILA:
	pci->pmm[2].pcila = value;
	break;

	case PCIL0_PTM1MS:
	pci->ptm[0].ms = value;
	break;
	case PCIL0_PTM1LA:
	pci->ptm[0].la = value;
	break;
	case PCIL0_PTM2MS:
	pci->ptm[1].ms = value;
	break;
	case PCIL0_PTM2LA:
	pci->ptm[1].la = value;
	break;

	default:
	printf("%s: unhandled PCI internal register 0x%lx\n", __func__,
	(unsigned long)offset);
	break;
	}
	}

	static uint64_t ppc4xx_pci_reg_read4(void *opaque, hwaddr offset,
	unsigned size)
	{
	struct PPC4xxPCIState *pci = opaque;
	uint32_t value;

	switch (offset) {
	case PCIL0_PMM0LA:
	value = pci->pmm[0].la;
	break;
	case PCIL0_PMM0MA:
	value = pci->pmm[0].ma;
	break;
	case PCIL0_PMM0PCIHA:
	value = pci->pmm[0].pciha;
	break;
	case PCIL0_PMM0PCILA:
	value = pci->pmm[0].pcila;
	break;

	case PCIL0_PMM1LA:
	value = pci->pmm[1].la;
	break;
	case PCIL0_PMM1MA:
	value = pci->pmm[1].ma;
	break;
	case PCIL0_PMM1PCIHA:
	value = pci->pmm[1].pciha;
	break;
	case PCIL0_PMM1PCILA:
	value = pci->pmm[1].pcila;
	break;

	case PCIL0_PMM2LA:
	value = pci->pmm[2].la;
	break;
	case PCIL0_PMM2MA:
	value = pci->pmm[2].ma;
	break;
	case PCIL0_PMM2PCIHA:
	value = pci->pmm[2].pciha;
	break;
	case PCIL0_PMM2PCILA:
	value = pci->pmm[2].pcila;
	break;

	case PCIL0_PTM1MS:
	value = pci->ptm[0].ms;
	break;
	case PCIL0_PTM1LA:
	value = pci->ptm[0].la;
	break;
	case PCIL0_PTM2MS:
	value = pci->ptm[1].ms;
	break;
	case PCIL0_PTM2LA:
	value = pci->ptm[1].la;
	break;

	default:
	printf("%s: invalid PCI internal register 0x%lx\n", __func__,
	(unsigned long)offset);
	value = 0;
	}

	return value;
	}

	static const MemoryRegionOps pci_reg_ops = {
	.read = ppc4xx_pci_reg_read4,
	.write = ppc4xx_pci_reg_write4,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	static void ppc4xx_pci_reset(void *opaque)
	{
	struct PPC4xxPCIState *pci = opaque;

	memset(pci->pmm, 0, sizeof(pci->pmm));
	memset(pci->ptm, 0, sizeof(pci->ptm));
	}

	/* On Bamboo, all pins from each slot are tied to a single board IRQ. This
	* may need further refactoring for other boards. */
	static int ppc4xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
	{
	int slot = pci_dev->devfn >> 3;

	DPRINTF("%s: devfn %x irq %d -> %d\n", __func__,
	pci_dev->devfn, irq_num, slot);

	return slot - 1;
	}

	static void ppc4xx_pci_set_irq(void *opaque, int irq_num, int level)
	{
	qemu_irq *pci_irqs = opaque;

	DPRINTF("%s: PCI irq %d\n", __func__, irq_num);
	if (irq_num < 0) {
	fprintf(stderr, "%s: PCI irq %d\n", __func__, irq_num);
	return;
	}
	qemu_set_irq(pci_irqs[irq_num], level);
	}

	static const VMStateDescription vmstate_pci_master_map = {
	.name = "pci_master_map",
	.version_id = 0,
	.minimum_version_id = 0,
	.fields = (VMStateField[]) {
	VMSTATE_UINT32(la, struct PCIMasterMap),
	VMSTATE_UINT32(ma, struct PCIMasterMap),
	VMSTATE_UINT32(pcila, struct PCIMasterMap),
	VMSTATE_UINT32(pciha, struct PCIMasterMap),
	VMSTATE_END_OF_LIST()
	}
	};

	static const VMStateDescription vmstate_pci_target_map = {
	.name = "pci_target_map",
	.version_id = 0,
	.minimum_version_id = 0,
	.fields = (VMStateField[]) {
	VMSTATE_UINT32(ms, struct PCITargetMap),
	VMSTATE_UINT32(la, struct PCITargetMap),
	VMSTATE_END_OF_LIST()
	}
	};

	static const VMStateDescription vmstate_ppc4xx_pci = {
	.name = "ppc4xx_pci",
	.version_id = 1,
	.minimum_version_id = 1,
	.fields = (VMStateField[]) {
	VMSTATE_STRUCT_ARRAY(pmm, PPC4xxPCIState, PPC4xx_PCI_NR_PMMS, 1,
	vmstate_pci_master_map,
	struct PCIMasterMap),
	VMSTATE_STRUCT_ARRAY(ptm, PPC4xxPCIState, PPC4xx_PCI_NR_PTMS, 1,
	vmstate_pci_target_map,
	struct PCITargetMap),
	VMSTATE_END_OF_LIST()
	}
	};

	/* XXX Interrupt acknowledge cycles not supported. */
	static int ppc4xx_pcihost_initfn(SysBusDevice *dev)
	{
	PPC4xxPCIState *s;
	PCIHostState *h;
	PCIBus *b;
	int i;

	h = PCI_HOST_BRIDGE(dev);
	s = PPC4xx_PCI_HOST_BRIDGE(dev);

	for (i = 0; i < ARRAY_SIZE(s->irq); i++) {
	sysbus_init_irq(dev, &s->irq[i]);
	}

	b = pci_register_bus(DEVICE(dev), NULL, ppc4xx_pci_set_irq,
	ppc4xx_pci_map_irq, s->irq, get_system_memory(),
	get_system_io(), 0, 4, TYPE_PCI_BUS);
	h->bus = b;

	pci_create_simple(b, 0, "ppc4xx-host-bridge");

	/* XXX split into 2 memory regions, one for config space, one for regs */
	memory_region_init(&s->container, OBJECT(s), "pci-container", PCI_ALL_SIZE);
	memory_region_init_io(&h->conf_mem, OBJECT(s), &pci_host_conf_le_ops, h,
	"pci-conf-idx", 4);
	memory_region_init_io(&h->data_mem, OBJECT(s), &pci_host_data_le_ops, h,
	"pci-conf-data", 4);
	memory_region_init_io(&s->iomem, OBJECT(s), &pci_reg_ops, s,
	"pci.reg", PCI_REG_SIZE);
	memory_region_add_subregion(&s->container, PCIC0_CFGADDR, &h->conf_mem);
	memory_region_add_subregion(&s->container, PCIC0_CFGDATA, &h->data_mem);
	memory_region_add_subregion(&s->container, PCI_REG_BASE, &s->iomem);
	sysbus_init_mmio(dev, &s->container);
	qemu_register_reset(ppc4xx_pci_reset, s);

	return 0;
	}

	static void ppc4xx_host_bridge_class_init(ObjectClass klass, void data)
	{
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	dc->desc = "Host bridge";
	k->vendor_id = PCI_VENDOR_ID_IBM;
	k->device_id = PCI_DEVICE_ID_IBM_440GX;
	k->class_id = PCI_CLASS_BRIDGE_OTHER;
	/*
	* 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 ppc4xx_host_bridge_info = {
	.name = "ppc4xx-host-bridge",
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCIDevice),
	.class_init = ppc4xx_host_bridge_class_init,
	};

	static void ppc4xx_pcihost_class_init(ObjectClass klass, void data)
	{
	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	k->init = ppc4xx_pcihost_initfn;
	dc->vmsd = &vmstate_ppc4xx_pci;
	}

	static const TypeInfo ppc4xx_pcihost_info = {
	.name = TYPE_PPC4xx_PCI_HOST_BRIDGE,
	.parent = TYPE_PCI_HOST_BRIDGE,
	.instance_size = sizeof(PPC4xxPCIState),
	.class_init = ppc4xx_pcihost_class_init,
	};

	static void ppc4xx_pci_register_types(void)
	{
	type_register_static(&ppc4xx_pcihost_info);
	type_register_static(&ppc4xx_host_bridge_info);
	}

	type_init(ppc4xx_pci_register_types)