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

 /*
  * QEMU PREP PCI host
  *
  * Copyright (c) 2006 Fabrice Bellard
  * Copyright (c) 2011-2013 Andreas Färber
  *
  * 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 "qemu/osdep.h"
 #include "qemu/datadir.h"
 #include "qemu/units.h"
 #include "qemu/log.h"
 #include "qapi/error.h"
 #include "hw/pci/pci_device.h"
 #include "hw/pci/pci_bus.h"
 #include "hw/pci/pci_host.h"
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
 #include "hw/intc/i8259.h"
 #include "hw/irq.h"
 #include "hw/loader.h"
 #include "hw/or-irq.h"
 #include "elf.h"
 #include "qom/object.h"

 #define TYPE_RAVEN_PCI_DEVICE "raven"
 #define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"

 OBJECT_DECLARE_SIMPLE_TYPE(RavenPCIState, RAVEN_PCI_DEVICE)

 struct RavenPCIState {
     PCIDevice dev;

     uint32_t elf_machine;
     char *bios_name;
     MemoryRegion bios;
 };

 typedef struct PRePPCIState PREPPCIState;
 DECLARE_INSTANCE_CHECKER(PREPPCIState, RAVEN_PCI_HOST_BRIDGE,
                          TYPE_RAVEN_PCI_HOST_BRIDGE)

 struct PRePPCIState {
     PCIHostState parent_obj;

     OrIRQState *or_irq;
     qemu_irq pci_irqs[PCI_NUM_PINS];
     PCIBus pci_bus;
     AddressSpace pci_io_as;
     MemoryRegion pci_io;
     MemoryRegion pci_io_non_contiguous;
     MemoryRegion pci_memory;
     MemoryRegion pci_intack;
     MemoryRegion bm;
     MemoryRegion bm_ram_alias;
     MemoryRegion bm_pci_memory_alias;
     AddressSpace bm_as;
     RavenPCIState pci_dev;

     int contiguous_map;
     bool is_legacy_prep;
 };

 #define BIOS_SIZE (1 * MiB)

 #define PCI_IO_BASE_ADDR    0x80000000  /* Physical address on main bus */

 static inline uint32_t raven_pci_io_config(hwaddr addr)
 {
     int i;

     for (i = 0; i < 11; i++) {
         if ((addr & (1 << (11 + i))) != 0) {
             break;
         }
     }
     return (addr & 0x7ff) |  (i << 11);
 }

 static void raven_pci_io_write(void *opaque, hwaddr addr,
                                uint64_t val, unsigned int size)
 {
     PREPPCIState *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
     pci_data_write(phb->bus, raven_pci_io_config(addr), val, size);
 }

 static uint64_t raven_pci_io_read(void *opaque, hwaddr addr,
                                   unsigned int size)
 {
     PREPPCIState *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
     return pci_data_read(phb->bus, raven_pci_io_config(addr), size);
 }

 static const MemoryRegionOps raven_pci_io_ops = {
     .read = raven_pci_io_read,
     .write = raven_pci_io_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 static uint64_t raven_intack_read(void *opaque, hwaddr addr,
                                   unsigned int size)
 {
     return pic_read_irq(isa_pic);
 }

 static void raven_intack_write(void *opaque, hwaddr addr,
                                         uint64_t data, unsigned size)
 {
     qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
 }

 static const MemoryRegionOps raven_intack_ops = {
     .read = raven_intack_read,
     .write = raven_intack_write,
     .valid = {
         .max_access_size = 1,
     },
 };

 static inline hwaddr raven_io_address(PREPPCIState *s,
                                       hwaddr addr)
 {
     if (s->contiguous_map == 0) {
         /* 64 KB contiguous space for IOs */
         addr &= 0xFFFF;
     } else {
         /* 8 MB non-contiguous space for IOs */
         addr = (addr & 0x1F) | ((addr & 0x007FFF000) >> 7);
     }

     /* FIXME: handle endianness switch */

     return addr;
 }

 static uint64_t raven_io_read(void *opaque, hwaddr addr,
                               unsigned int size)
 {
     PREPPCIState *s = opaque;
     uint8_t buf[4];

     addr = raven_io_address(s, addr);
     address_space_read(&s->pci_io_as, addr + PCI_IO_BASE_ADDR,
                        MEMTXATTRS_UNSPECIFIED, buf, size);

     if (size == 1) {
         return buf[0];
     } else if (size == 2) {
         return lduw_le_p(buf);
     } else if (size == 4) {
         return ldl_le_p(buf);
     } else {
         g_assert_not_reached();
     }
 }

 static void raven_io_write(void *opaque, hwaddr addr,
                            uint64_t val, unsigned int size)
 {
     PREPPCIState *s = opaque;
     uint8_t buf[4];

     addr = raven_io_address(s, addr);

     if (size == 1) {
         buf[0] = val;
     } else if (size == 2) {
         stw_le_p(buf, val);
     } else if (size == 4) {
         stl_le_p(buf, val);
     } else {
         g_assert_not_reached();
     }

     address_space_write(&s->pci_io_as, addr + PCI_IO_BASE_ADDR,
                         MEMTXATTRS_UNSPECIFIED, buf, size);
 }

 static const MemoryRegionOps raven_io_ops = {
     .read = raven_io_read,
     .write = raven_io_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .impl.max_access_size = 4,
     .impl.unaligned = true,
     .valid.unaligned = true,
 };

 static int raven_map_irq(PCIDevice *pci_dev, int irq_num)
 {
     return (irq_num + (pci_dev->devfn >> 3)) & 1;
 }

 static void raven_set_irq(void *opaque, int irq_num, int level)
 {
     PREPPCIState *s = opaque;

     qemu_set_irq(s->pci_irqs[irq_num], level);
 }

 static AddressSpace *raven_pcihost_set_iommu(PCIBus *bus, void *opaque,
                                              int devfn)
 {
     PREPPCIState *s = opaque;

     return &s->bm_as;
 }

 static const PCIIOMMUOps raven_iommu_ops = {
     .get_address_space = raven_pcihost_set_iommu,
 };

 static void raven_change_gpio(void *opaque, int n, int level)
 {
     PREPPCIState *s = opaque;

     s->contiguous_map = level;
 }

 static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
 {
     SysBusDevice *dev = SYS_BUS_DEVICE(d);
     PCIHostState *h = PCI_HOST_BRIDGE(dev);
     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(dev);
     MemoryRegion *address_space_mem = get_system_memory();
     int i;

     if (s->is_legacy_prep) {
         for (i = 0; i < PCI_NUM_PINS; i++) {
             sysbus_init_irq(dev, &s->pci_irqs[i]);
         }
     } else {
         /* According to PReP specification section 6.1.6 "System Interrupt
          * Assignments", all PCI interrupts are routed via IRQ 15 */
         s->or_irq = OR_IRQ(object_new(TYPE_OR_IRQ));
         object_property_set_int(OBJECT(s->or_irq), "num-lines", PCI_NUM_PINS,
                                 &error_fatal);
         qdev_realize(DEVICE(s->or_irq), NULL, &error_fatal);
         sysbus_init_irq(dev, &s->or_irq->out_irq);

         for (i = 0; i < PCI_NUM_PINS; i++) {
             s->pci_irqs[i] = qdev_get_gpio_in(DEVICE(s->or_irq), i);
         }
     }

     qdev_init_gpio_in(d, raven_change_gpio, 1);

     pci_bus_irqs(&s->pci_bus, raven_set_irq, s, PCI_NUM_PINS);
     pci_bus_map_irqs(&s->pci_bus, raven_map_irq);

     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops, s,
                           "pci-conf-idx", 4);
     memory_region_add_subregion(&s->pci_io, 0xcf8, &h->conf_mem);

     memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops, s,
                           "pci-conf-data", 4);
     memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);

     memory_region_init_io(&h->mmcfg, OBJECT(s), &raven_pci_io_ops, s,
                           "pciio", 0x00400000);
     memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);

     memory_region_init_io(&s->pci_intack, OBJECT(s), &raven_intack_ops, s,
                           "pci-intack", 1);
     memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);

     /* TODO Remove once realize propagates to child devices. */
     qdev_realize(DEVICE(&s->pci_dev), BUS(&s->pci_bus), errp);
 }

 static void raven_pcihost_initfn(Object *obj)
 {
     PCIHostState *h = PCI_HOST_BRIDGE(obj);
     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
     MemoryRegion *address_space_mem = get_system_memory();
     DeviceState *pci_dev;

     memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
     memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
                           "pci-io-non-contiguous", 0x00800000);
     memory_region_init(&s->pci_memory, obj, "pci-memory", 0x3f000000);
     address_space_init(&s->pci_io_as, &s->pci_io, "raven-io");

     /*
      * Raven's raven_io_ops use the address-space API to access pci-conf-idx
      * (which is also owned by the raven device). As such, mark the
      * pci_io_non_contiguous as re-entrancy safe.
      */
     s->pci_io_non_contiguous.disable_reentrancy_guard = true;

     /* CPU address space */
     memory_region_add_subregion(address_space_mem, PCI_IO_BASE_ADDR,
                                 &s->pci_io);
     memory_region_add_subregion_overlap(address_space_mem, PCI_IO_BASE_ADDR,
                                         &s->pci_io_non_contiguous, 1);
     memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
     pci_root_bus_init(&s->pci_bus, sizeof(s->pci_bus), DEVICE(obj), NULL,
                       &s->pci_memory, &s->pci_io, 0, TYPE_PCI_BUS);

     /* Bus master address space */
     memory_region_init(&s->bm, obj, "bm-raven", 4 * GiB);
     memory_region_init_alias(&s->bm_pci_memory_alias, obj, "bm-pci-memory",
                              &s->pci_memory, 0,
                              memory_region_size(&s->pci_memory));
     memory_region_init_alias(&s->bm_ram_alias, obj, "bm-system",
                              get_system_memory(), 0, 0x80000000);
     memory_region_add_subregion(&s->bm, 0         , &s->bm_pci_memory_alias);
     memory_region_add_subregion(&s->bm, 0x80000000, &s->bm_ram_alias);
     address_space_init(&s->bm_as, &s->bm, "raven-bm");
     pci_setup_iommu(&s->pci_bus, &raven_iommu_ops, s);

     h->bus = &s->pci_bus;

     object_initialize(&s->pci_dev, sizeof(s->pci_dev), TYPE_RAVEN_PCI_DEVICE);
     pci_dev = DEVICE(&s->pci_dev);
     object_property_set_int(OBJECT(&s->pci_dev), "addr", PCI_DEVFN(0, 0),
                             NULL);
     qdev_prop_set_bit(pci_dev, "multifunction", false);
 }

 static void raven_realize(PCIDevice *d, Error **errp)
 {
     RavenPCIState *s = RAVEN_PCI_DEVICE(d);
     char *filename;
     int bios_size = -1;

     d->config[PCI_CACHE_LINE_SIZE] = 0x08;
     d->config[PCI_LATENCY_TIMER] = 0x10;
     d->config[PCI_CAPABILITY_LIST] = 0x00;

     if (!memory_region_init_rom_nomigrate(&s->bios, OBJECT(s), "bios",
                                           BIOS_SIZE, errp)) {
         return;
     }
     memory_region_add_subregion(get_system_memory(), (uint32_t)(-BIOS_SIZE),
                                 &s->bios);
     if (s->bios_name) {
         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, s->bios_name);
         if (filename) {
             if (s->elf_machine != EM_NONE) {
                 bios_size = load_elf(filename, NULL, NULL, NULL, NULL,
                                      NULL, NULL, NULL, 1, s->elf_machine,
                                      0, 0);
             }
             if (bios_size < 0) {
                 bios_size = get_image_size(filename);
                 if (bios_size > 0 && bios_size <= BIOS_SIZE) {
                     hwaddr bios_addr;
                     bios_size = (bios_size + 0xfff) & ~0xfff;
                     bios_addr = (uint32_t)(-BIOS_SIZE);
                     bios_size = load_image_targphys(filename, bios_addr,
                                                     bios_size);
                 }
             }
         }
         g_free(filename);
         if (bios_size < 0 || bios_size > BIOS_SIZE) {
             memory_region_del_subregion(get_system_memory(), &s->bios);
             error_setg(errp, "Could not load bios image '%s'", s->bios_name);
             return;
         }
     }

     vmstate_register_ram_global(&s->bios);
 }

 static const VMStateDescription vmstate_raven = {
     .name = "raven",
     .version_id = 0,
     .minimum_version_id = 0,
     .fields = (const VMStateField[]) {
         VMSTATE_PCI_DEVICE(dev, RavenPCIState),
         VMSTATE_END_OF_LIST()
     },
 };

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

     k->realize = raven_realize;
     k->vendor_id = PCI_VENDOR_ID_MOTOROLA;
     k->device_id = PCI_DEVICE_ID_MOTOROLA_RAVEN;
     k->revision = 0x00;
     k->class_id = PCI_CLASS_BRIDGE_HOST;
     dc->desc = "PReP Host Bridge - Motorola Raven";
     dc->vmsd = &vmstate_raven;
     /*
      * Reason: PCI-facing part of the host bridge, not usable without
      * the host-facing part, which can't be device_add'ed, yet.
      */
     dc->user_creatable = false;
 }

 static const TypeInfo raven_info = {
     .name = TYPE_RAVEN_PCI_DEVICE,
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(RavenPCIState),
     .class_init = raven_class_init,
     .interfaces = (InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 static Property raven_pcihost_properties[] = {
     DEFINE_PROP_UINT32("elf-machine", PREPPCIState, pci_dev.elf_machine,
                        EM_NONE),
     DEFINE_PROP_STRING("bios-name", PREPPCIState, pci_dev.bios_name),
     /* Temporary workaround until legacy prep machine is removed */
     DEFINE_PROP_BOOL("is-legacy-prep", PREPPCIState, is_legacy_prep,
                      false),
     DEFINE_PROP_END_OF_LIST()
 };

 static void raven_pcihost_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);

     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
     dc->realize = raven_pcihost_realizefn;
     device_class_set_props(dc, raven_pcihost_properties);
     dc->fw_name = "pci";
 }

 static const TypeInfo raven_pcihost_info = {
     .name = TYPE_RAVEN_PCI_HOST_BRIDGE,
     .parent = TYPE_PCI_HOST_BRIDGE,
     .instance_size = sizeof(PREPPCIState),
     .instance_init = raven_pcihost_initfn,
     .class_init = raven_pcihost_class_init,
 };

 static void raven_register_types(void)
 {
     type_register_static(&raven_pcihost_info);
     type_register_static(&raven_info);
 }

 type_init(raven_register_types)
	/*
	* QEMU PREP PCI host
	*
	* Copyright (c) 2006 Fabrice Bellard
	* Copyright (c) 2011-2013 Andreas Färber
	*
	* 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 "qemu/osdep.h"
	#include "qemu/datadir.h"
	#include "qemu/units.h"
	#include "qemu/log.h"
	#include "qapi/error.h"
	#include "hw/pci/pci_device.h"
	#include "hw/pci/pci_bus.h"
	#include "hw/pci/pci_host.h"
	#include "hw/qdev-properties.h"
	#include "migration/vmstate.h"
	#include "hw/intc/i8259.h"
	#include "hw/irq.h"
	#include "hw/loader.h"
	#include "hw/or-irq.h"
	#include "elf.h"
	#include "qom/object.h"

	#define TYPE_RAVEN_PCI_DEVICE "raven"
	#define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"

	OBJECT_DECLARE_SIMPLE_TYPE(RavenPCIState, RAVEN_PCI_DEVICE)

	struct RavenPCIState {
	PCIDevice dev;

	uint32_t elf_machine;
	char *bios_name;
	MemoryRegion bios;
	};

	typedef struct PRePPCIState PREPPCIState;
	DECLARE_INSTANCE_CHECKER(PREPPCIState, RAVEN_PCI_HOST_BRIDGE,
	TYPE_RAVEN_PCI_HOST_BRIDGE)

	struct PRePPCIState {
	PCIHostState parent_obj;

	OrIRQState *or_irq;
	qemu_irq pci_irqs[PCI_NUM_PINS];
	PCIBus pci_bus;
	AddressSpace pci_io_as;
	MemoryRegion pci_io;
	MemoryRegion pci_io_non_contiguous;
	MemoryRegion pci_memory;
	MemoryRegion pci_intack;
	MemoryRegion bm;
	MemoryRegion bm_ram_alias;
	MemoryRegion bm_pci_memory_alias;
	AddressSpace bm_as;
	RavenPCIState pci_dev;

	int contiguous_map;
	bool is_legacy_prep;
	};

	#define BIOS_SIZE (1 * MiB)

	#define PCI_IO_BASE_ADDR 0x80000000 /* Physical address on main bus */

	static inline uint32_t raven_pci_io_config(hwaddr addr)
	{
	int i;

	for (i = 0; i < 11; i++) {
	if ((addr & (1 << (11 + i))) != 0) {
	break;
	}
	}
	return (addr & 0x7ff) \| (i << 11);
	}

	static void raven_pci_io_write(void *opaque, hwaddr addr,
	uint64_t val, unsigned int size)
	{
	PREPPCIState *s = opaque;
	PCIHostState *phb = PCI_HOST_BRIDGE(s);
	pci_data_write(phb->bus, raven_pci_io_config(addr), val, size);
	}

	static uint64_t raven_pci_io_read(void *opaque, hwaddr addr,
	unsigned int size)
	{
	PREPPCIState *s = opaque;
	PCIHostState *phb = PCI_HOST_BRIDGE(s);
	return pci_data_read(phb->bus, raven_pci_io_config(addr), size);
	}

	static const MemoryRegionOps raven_pci_io_ops = {
	.read = raven_pci_io_read,
	.write = raven_pci_io_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	static uint64_t raven_intack_read(void *opaque, hwaddr addr,
	unsigned int size)
	{
	return pic_read_irq(isa_pic);
	}

	static void raven_intack_write(void *opaque, hwaddr addr,
	uint64_t data, unsigned size)
	{
	qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
	}

	static const MemoryRegionOps raven_intack_ops = {
	.read = raven_intack_read,
	.write = raven_intack_write,
	.valid = {
	.max_access_size = 1,
	},
	};

	static inline hwaddr raven_io_address(PREPPCIState *s,
	hwaddr addr)
	{
	if (s->contiguous_map == 0) {
	/* 64 KB contiguous space for IOs */
	addr &= 0xFFFF;
	} else {
	/* 8 MB non-contiguous space for IOs */
	addr = (addr & 0x1F) \| ((addr & 0x007FFF000) >> 7);
	}

	/* FIXME: handle endianness switch */

	return addr;
	}

	static uint64_t raven_io_read(void *opaque, hwaddr addr,
	unsigned int size)
	{
	PREPPCIState *s = opaque;
	uint8_t buf[4];

	addr = raven_io_address(s, addr);
	address_space_read(&s->pci_io_as, addr + PCI_IO_BASE_ADDR,
	MEMTXATTRS_UNSPECIFIED, buf, size);

	if (size == 1) {
	return buf[0];
	} else if (size == 2) {
	return lduw_le_p(buf);
	} else if (size == 4) {
	return ldl_le_p(buf);
	} else {
	g_assert_not_reached();
	}
	}

	static void raven_io_write(void *opaque, hwaddr addr,
	uint64_t val, unsigned int size)
	{
	PREPPCIState *s = opaque;
	uint8_t buf[4];

	addr = raven_io_address(s, addr);

	if (size == 1) {
	buf[0] = val;
	} else if (size == 2) {
	stw_le_p(buf, val);
	} else if (size == 4) {
	stl_le_p(buf, val);
	} else {
	g_assert_not_reached();
	}

	address_space_write(&s->pci_io_as, addr + PCI_IO_BASE_ADDR,
	MEMTXATTRS_UNSPECIFIED, buf, size);
	}

	static const MemoryRegionOps raven_io_ops = {
	.read = raven_io_read,
	.write = raven_io_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	.impl.max_access_size = 4,
	.impl.unaligned = true,
	.valid.unaligned = true,
	};

	static int raven_map_irq(PCIDevice *pci_dev, int irq_num)
	{
	return (irq_num + (pci_dev->devfn >> 3)) & 1;
	}

	static void raven_set_irq(void *opaque, int irq_num, int level)
	{
	PREPPCIState *s = opaque;

	qemu_set_irq(s->pci_irqs[irq_num], level);
	}

	static AddressSpace raven_pcihost_set_iommu(PCIBus bus, void *opaque,
	int devfn)
	{
	PREPPCIState *s = opaque;

	return &s->bm_as;
	}

	static const PCIIOMMUOps raven_iommu_ops = {
	.get_address_space = raven_pcihost_set_iommu,
	};

	static void raven_change_gpio(void *opaque, int n, int level)
	{
	PREPPCIState *s = opaque;

	s->contiguous_map = level;
	}

	static void raven_pcihost_realizefn(DeviceState d, Error *errp)
	{
	SysBusDevice *dev = SYS_BUS_DEVICE(d);
	PCIHostState *h = PCI_HOST_BRIDGE(dev);
	PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(dev);
	MemoryRegion *address_space_mem = get_system_memory();
	int i;

	if (s->is_legacy_prep) {
	for (i = 0; i < PCI_NUM_PINS; i++) {
	sysbus_init_irq(dev, &s->pci_irqs[i]);
	}
	} else {
	/* According to PReP specification section 6.1.6 "System Interrupt
	* Assignments", all PCI interrupts are routed via IRQ 15 */
	s->or_irq = OR_IRQ(object_new(TYPE_OR_IRQ));
	object_property_set_int(OBJECT(s->or_irq), "num-lines", PCI_NUM_PINS,
	&error_fatal);
	qdev_realize(DEVICE(s->or_irq), NULL, &error_fatal);
	sysbus_init_irq(dev, &s->or_irq->out_irq);

	for (i = 0; i < PCI_NUM_PINS; i++) {
	s->pci_irqs[i] = qdev_get_gpio_in(DEVICE(s->or_irq), i);
	}
	}

	qdev_init_gpio_in(d, raven_change_gpio, 1);

	pci_bus_irqs(&s->pci_bus, raven_set_irq, s, PCI_NUM_PINS);
	pci_bus_map_irqs(&s->pci_bus, raven_map_irq);

	memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops, s,
	"pci-conf-idx", 4);
	memory_region_add_subregion(&s->pci_io, 0xcf8, &h->conf_mem);

	memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops, s,
	"pci-conf-data", 4);
	memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);

	memory_region_init_io(&h->mmcfg, OBJECT(s), &raven_pci_io_ops, s,
	"pciio", 0x00400000);
	memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);

	memory_region_init_io(&s->pci_intack, OBJECT(s), &raven_intack_ops, s,
	"pci-intack", 1);
	memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);

	/* TODO Remove once realize propagates to child devices. */
	qdev_realize(DEVICE(&s->pci_dev), BUS(&s->pci_bus), errp);
	}

	static void raven_pcihost_initfn(Object *obj)
	{
	PCIHostState *h = PCI_HOST_BRIDGE(obj);
	PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
	MemoryRegion *address_space_mem = get_system_memory();
	DeviceState *pci_dev;

	memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
	memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
	"pci-io-non-contiguous", 0x00800000);
	memory_region_init(&s->pci_memory, obj, "pci-memory", 0x3f000000);
	address_space_init(&s->pci_io_as, &s->pci_io, "raven-io");

	/*
	* Raven's raven_io_ops use the address-space API to access pci-conf-idx
	* (which is also owned by the raven device). As such, mark the
	* pci_io_non_contiguous as re-entrancy safe.
	*/
	s->pci_io_non_contiguous.disable_reentrancy_guard = true;

	/* CPU address space */
	memory_region_add_subregion(address_space_mem, PCI_IO_BASE_ADDR,
	&s->pci_io);
	memory_region_add_subregion_overlap(address_space_mem, PCI_IO_BASE_ADDR,
	&s->pci_io_non_contiguous, 1);
	memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
	pci_root_bus_init(&s->pci_bus, sizeof(s->pci_bus), DEVICE(obj), NULL,
	&s->pci_memory, &s->pci_io, 0, TYPE_PCI_BUS);

	/* Bus master address space */
	memory_region_init(&s->bm, obj, "bm-raven", 4 * GiB);
	memory_region_init_alias(&s->bm_pci_memory_alias, obj, "bm-pci-memory",
	&s->pci_memory, 0,
	memory_region_size(&s->pci_memory));
	memory_region_init_alias(&s->bm_ram_alias, obj, "bm-system",
	get_system_memory(), 0, 0x80000000);
	memory_region_add_subregion(&s->bm, 0 , &s->bm_pci_memory_alias);
	memory_region_add_subregion(&s->bm, 0x80000000, &s->bm_ram_alias);
	address_space_init(&s->bm_as, &s->bm, "raven-bm");
	pci_setup_iommu(&s->pci_bus, &raven_iommu_ops, s);

	h->bus = &s->pci_bus;

	object_initialize(&s->pci_dev, sizeof(s->pci_dev), TYPE_RAVEN_PCI_DEVICE);
	pci_dev = DEVICE(&s->pci_dev);
	object_property_set_int(OBJECT(&s->pci_dev), "addr", PCI_DEVFN(0, 0),
	NULL);
	qdev_prop_set_bit(pci_dev, "multifunction", false);
	}

	static void raven_realize(PCIDevice d, Error *errp)
	{
	RavenPCIState *s = RAVEN_PCI_DEVICE(d);
	char *filename;
	int bios_size = -1;

	d->config[PCI_CACHE_LINE_SIZE] = 0x08;
	d->config[PCI_LATENCY_TIMER] = 0x10;
	d->config[PCI_CAPABILITY_LIST] = 0x00;

	if (!memory_region_init_rom_nomigrate(&s->bios, OBJECT(s), "bios",
	BIOS_SIZE, errp)) {
	return;
	}
	memory_region_add_subregion(get_system_memory(), (uint32_t)(-BIOS_SIZE),
	&s->bios);
	if (s->bios_name) {
	filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, s->bios_name);
	if (filename) {
	if (s->elf_machine != EM_NONE) {
	bios_size = load_elf(filename, NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, 1, s->elf_machine,
	0, 0);
	}
	if (bios_size < 0) {
	bios_size = get_image_size(filename);
	if (bios_size > 0 && bios_size <= BIOS_SIZE) {
	hwaddr bios_addr;
	bios_size = (bios_size + 0xfff) & ~0xfff;
	bios_addr = (uint32_t)(-BIOS_SIZE);
	bios_size = load_image_targphys(filename, bios_addr,
	bios_size);
	}
	}
	}
	g_free(filename);
	if (bios_size < 0 \|\| bios_size > BIOS_SIZE) {
	memory_region_del_subregion(get_system_memory(), &s->bios);
	error_setg(errp, "Could not load bios image '%s'", s->bios_name);
	return;
	}
	}

	vmstate_register_ram_global(&s->bios);
	}

	static const VMStateDescription vmstate_raven = {
	.name = "raven",
	.version_id = 0,
	.minimum_version_id = 0,
	.fields = (const VMStateField[]) {
	VMSTATE_PCI_DEVICE(dev, RavenPCIState),
	VMSTATE_END_OF_LIST()
	},
	};

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

	k->realize = raven_realize;
	k->vendor_id = PCI_VENDOR_ID_MOTOROLA;
	k->device_id = PCI_DEVICE_ID_MOTOROLA_RAVEN;
	k->revision = 0x00;
	k->class_id = PCI_CLASS_BRIDGE_HOST;
	dc->desc = "PReP Host Bridge - Motorola Raven";
	dc->vmsd = &vmstate_raven;
	/*
	* Reason: PCI-facing part of the host bridge, not usable without
	* the host-facing part, which can't be device_add'ed, yet.
	*/
	dc->user_creatable = false;
	}

	static const TypeInfo raven_info = {
	.name = TYPE_RAVEN_PCI_DEVICE,
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(RavenPCIState),
	.class_init = raven_class_init,
	.interfaces = (InterfaceInfo[]) {
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	static Property raven_pcihost_properties[] = {
	DEFINE_PROP_UINT32("elf-machine", PREPPCIState, pci_dev.elf_machine,
	EM_NONE),
	DEFINE_PROP_STRING("bios-name", PREPPCIState, pci_dev.bios_name),
	/* Temporary workaround until legacy prep machine is removed */
	DEFINE_PROP_BOOL("is-legacy-prep", PREPPCIState, is_legacy_prep,
	false),
	DEFINE_PROP_END_OF_LIST()
	};

	static void raven_pcihost_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);

	set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
	dc->realize = raven_pcihost_realizefn;
	device_class_set_props(dc, raven_pcihost_properties);
	dc->fw_name = "pci";
	}

	static const TypeInfo raven_pcihost_info = {
	.name = TYPE_RAVEN_PCI_HOST_BRIDGE,
	.parent = TYPE_PCI_HOST_BRIDGE,
	.instance_size = sizeof(PREPPCIState),
	.instance_init = raven_pcihost_initfn,
	.class_init = raven_pcihost_class_init,
	};

	static void raven_register_types(void)
	{
	type_register_static(&raven_pcihost_info);
	type_register_static(&raven_info);
	}

	type_init(raven_register_types)