diff --git a/Makefile.target b/Makefile.target
index 0f8137b..9363ffa 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -212,7 +212,7 @@ obj-mips-y = mips_r4k.o mips_jazz.o mips_malta.o mips_mipssim.o
 obj-mips-y += mips_timer.o mips_int.o dma.o vga.o serial.o i8254.o i8259.o rc4030.o
 obj-mips-y += g364fb.o jazz_led.o dp8393x.o
 obj-mips-y += ide.o gt64xxx.o pckbd.o fdc.o mc146818rtc.o usb-uhci.o acpi.o ds1225y.o
-obj-mips-y += piix_pci.o parallel.o cirrus_vga.o isa-bus.o pcspk.o $(sound-obj-y)
+obj-mips-y += piix4.o parallel.o cirrus_vga.o isa-bus.o pcspk.o $(sound-obj-y)
 obj-mips-y += mipsnet.o
 obj-mips-y += pflash_cfi01.o
 obj-mips-y += vmware_vga.o
diff --git a/hw/pc.h b/hw/pc.h
index 5649fc4..f76e118 100644
--- a/hw/pc.h
+++ b/hw/pc.h
@@ -122,6 +122,7 @@ void i440fx_set_smm(PCIDevice *d, int val);
 int piix3_init(PCIBus *bus, int devfn);
 void i440fx_init_memory_mappings(PCIDevice *d);

+/* piix4.c */
 extern PCIDevice *piix4_dev;
 int piix4_init(PCIBus *bus, int devfn);

diff --git a/hw/piix4.c b/hw/piix4.c
new file mode 100644
index 0000000..c489f13
--- /dev/null
+++ b/hw/piix4.c
@@ -0,0 +1,127 @@
+/*
+ * QEMU PIIX4 PCI Bridge Emulation
+ *
+ * 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.h"
+#include "pc.h"
+#include "pci.h"
+#include "isa.h"
+#include "sysbus.h"
+
+PCIDevice *piix4_dev;
+
+static void piix4_reset(void *opaque)
+{
+    PCIDevice *d = opaque;
+    uint8_t *pci_conf = d->config;
+
+    pci_conf[0x04] = 0x07; // master, memory and I/O
+    pci_conf[0x05] = 0x00;
+    pci_conf[0x06] = 0x00;
+    pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
+    pci_conf[0x4c] = 0x4d;
+    pci_conf[0x4e] = 0x03;
+    pci_conf[0x4f] = 0x00;
+    pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
+    pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
+    pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
+    pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
+    pci_conf[0x69] = 0x02;
+    pci_conf[0x70] = 0x80;
+    pci_conf[0x76] = 0x0c;
+    pci_conf[0x77] = 0x0c;
+    pci_conf[0x78] = 0x02;
+    pci_conf[0x79] = 0x00;
+    pci_conf[0x80] = 0x00;
+    pci_conf[0x82] = 0x00;
+    pci_conf[0xa0] = 0x08;
+    pci_conf[0xa2] = 0x00;
+    pci_conf[0xa3] = 0x00;
+    pci_conf[0xa4] = 0x00;
+    pci_conf[0xa5] = 0x00;
+    pci_conf[0xa6] = 0x00;
+    pci_conf[0xa7] = 0x00;
+    pci_conf[0xa8] = 0x0f;
+    pci_conf[0xaa] = 0x00;
+    pci_conf[0xab] = 0x00;
+    pci_conf[0xac] = 0x00;
+    pci_conf[0xae] = 0x00;
+}
+
+static void piix_save(QEMUFile* f, void *opaque)
+{
+    PCIDevice *d = opaque;
+    pci_device_save(d, f);
+}
+
+static int piix_load(QEMUFile* f, void *opaque, int version_id)
+{
+    PCIDevice *d = opaque;
+    if (version_id != 2)
+        return -EINVAL;
+    return pci_device_load(d, f);
+}
+
+static void piix4_initfn(PCIDevice *d)
+{
+    uint8_t *pci_conf;
+
+    register_savevm("PIIX4", 0, 2, piix_save, piix_load, d);
+
+    pci_conf = d->config;
+    pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
+    pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_0); // 82371AB/EB/MB PIIX4 PCI-to-ISA bridge
+    pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
+    pci_conf[PCI_HEADER_TYPE] =
+        PCI_HEADER_TYPE_NORMAL | PCI_HEADER_TYPE_MULTI_FUNCTION; // header_type = PCI_multifunction, generic
+
+    piix4_dev = d;
+    piix4_reset(d);
+    qemu_register_reset(piix4_reset, d);
+}
+
+int piix4_init(PCIBus *bus, int devfn)
+{
+    PCIDevice *d;
+
+    d = pci_create_simple(bus, devfn, "PIIX4");
+    return d->devfn;
+}
+
+static PCIDeviceInfo piix4_info[] = {
+    {
+        .qdev.name    = "PIIX4",
+        .qdev.desc    = "ISA bridge",
+        .qdev.size    = sizeof(PCIDevice),
+        .qdev.no_user = 1,
+        .init         = piix4_initfn,
+    },{
+        /* end of list */
+    }
+};
+
+static void piix4_register(void)
+{
+    pci_qdev_register_many(piix4_info);
+}
+device_init(piix4_register);
diff --git a/hw/piix_pci.c b/hw/piix_pci.c
index 7cf1d99..86db2fc 100644
--- a/hw/piix_pci.c
+++ b/hw/piix_pci.c
@@ -222,7 +222,6 @@ PCIBus *i440fx_init(PCIDevice **pi440fx_state, qemu_irq *pic)
 /* PIIX3 PCI to ISA bridge */

 static PCIDevice *piix3_dev;
-PCIDevice *piix4_dev;

 static void piix3_set_irq(qemu_irq *pic, int irq_num, int level)
 {
@@ -285,44 +284,6 @@ static void piix3_reset(void *opaque)
     memset(pci_irq_levels, 0, sizeof(pci_irq_levels));
 }

-static void piix4_reset(void *opaque)
-{
-    PCIDevice *d = opaque;
-    uint8_t *pci_conf = d->config;
-
-    pci_conf[0x04] = 0x07; // master, memory and I/O
-    pci_conf[0x05] = 0x00;
-    pci_conf[0x06] = 0x00;
-    pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
-    pci_conf[0x4c] = 0x4d;
-    pci_conf[0x4e] = 0x03;
-    pci_conf[0x4f] = 0x00;
-    pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
-    pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
-    pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
-    pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
-    pci_conf[0x69] = 0x02;
-    pci_conf[0x70] = 0x80;
-    pci_conf[0x76] = 0x0c;
-    pci_conf[0x77] = 0x0c;
-    pci_conf[0x78] = 0x02;
-    pci_conf[0x79] = 0x00;
-    pci_conf[0x80] = 0x00;
-    pci_conf[0x82] = 0x00;
-    pci_conf[0xa0] = 0x08;
-    pci_conf[0xa2] = 0x00;
-    pci_conf[0xa3] = 0x00;
-    pci_conf[0xa4] = 0x00;
-    pci_conf[0xa5] = 0x00;
-    pci_conf[0xa6] = 0x00;
-    pci_conf[0xa7] = 0x00;
-    pci_conf[0xa8] = 0x0f;
-    pci_conf[0xaa] = 0x00;
-    pci_conf[0xab] = 0x00;
-    pci_conf[0xac] = 0x00;
-    pci_conf[0xae] = 0x00;
-}
-
 static void piix_save(QEMUFile* f, void *opaque)
 {
     PCIDevice *d = opaque;
@@ -356,24 +317,6 @@ static void piix3_initfn(PCIDevice *d)
     qemu_register_reset(piix3_reset, d);
 }

-static void piix4_initfn(PCIDevice *d)
-{
-    uint8_t *pci_conf;
-
-    register_savevm("PIIX4", 0, 2, piix_save, piix_load, d);
-
-    pci_conf = d->config;
-    pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
-    pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_0); // 82371AB/EB/MB PIIX4 PCI-to-ISA bridge
-    pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
-    pci_conf[PCI_HEADER_TYPE] =
-        PCI_HEADER_TYPE_NORMAL | PCI_HEADER_TYPE_MULTI_FUNCTION; // header_type = PCI_multifunction, generic
-
-    piix4_dev = d;
-    piix4_reset(d);
-    qemu_register_reset(piix4_reset, d);
-}
-
 int piix3_init(PCIBus *bus, int devfn)
 {
     PCIDevice *d;
@@ -382,14 +325,6 @@ int piix3_init(PCIBus *bus, int devfn)
     return d->devfn;
 }

-int piix4_init(PCIBus *bus, int devfn)
-{
-    PCIDevice *d;
-
-    d = pci_create_simple(bus, devfn, "PIIX4");
-    return d->devfn;
-}
-
 static PCIDeviceInfo i440fx_info[] = {
     {
         .qdev.name    = "i440FX",
@@ -405,12 +340,6 @@ static PCIDeviceInfo i440fx_info[] = {
         .qdev.no_user = 1,
         .init         = piix3_initfn,
     },{
-        .qdev.name    = "PIIX4",
-        .qdev.desc    = "ISA bridge",
-        .qdev.size    = sizeof(PCIDevice),
-        .qdev.no_user = 1,
-        .init         = piix4_initfn,
-    },{
         /* end of list */
     }
 };
