diff --git a/hw/ac97.c b/hw/ac97.c
index 610ca60..e3f0dbc 100644
--- a/hw/ac97.c
+++ b/hw/ac97.c
@@ -1250,7 +1250,7 @@ static int ac97_load (QEMUFile *f, void *opaque, int version_id)
 }
 
 static void ac97_map (PCIDevice *pci_dev, int region_num,
-                      uint32_t addr, uint32_t size, int type)
+                      pcibus_t addr, pcibus_t size, int type)
 {
     AC97LinkState *s = DO_UPCAST (AC97LinkState, dev, pci_dev);
     PCIDevice *d = &s->dev;
diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
index fd2367a..2a6aba8 100644
--- a/hw/cirrus_vga.c
+++ b/hw/cirrus_vga.c
@@ -3170,7 +3170,7 @@ void isa_cirrus_vga_init(void)
  ***************************************/
 
 static void cirrus_pci_lfb_map(PCIDevice *d, int region_num,
-			       uint32_t addr, uint32_t size, int type)
+			       pcibus_t addr, pcibus_t size, int type)
 {
     CirrusVGAState *s = &DO_UPCAST(PCICirrusVGAState, dev, d)->cirrus_vga;
 
@@ -3191,7 +3191,7 @@ static void cirrus_pci_lfb_map(PCIDevice *d, int region_num,
 }
 
 static void cirrus_pci_mmio_map(PCIDevice *d, int region_num,
-				uint32_t addr, uint32_t size, int type)
+				pcibus_t addr, pcibus_t size, int type)
 {
     CirrusVGAState *s = &DO_UPCAST(PCICirrusVGAState, dev, d)->cirrus_vga;
 
diff --git a/hw/e1000.c b/hw/e1000.c
index 95c471c..c07eb42 100644
--- a/hw/e1000.c
+++ b/hw/e1000.c
@@ -142,8 +142,8 @@ static const char phy_regcap[0x20] = {
 };
 
 static void
-ioport_map(PCIDevice *pci_dev, int region_num, uint32_t addr,
-           uint32_t size, int type)
+ioport_map(PCIDevice *pci_dev, int region_num, pcibus_t addr,
+           pcibus_t size, int type)
 {
     DBGOUT(IO, "e1000_ioport_map addr=0x%04x size=0x%08x\n", addr, size);
 }
@@ -1030,7 +1030,7 @@ static CPUReadMemoryFunc * const e1000_mmio_read[] = {
 
 static void
 e1000_mmio_map(PCIDevice *pci_dev, int region_num,
-                uint32_t addr, uint32_t size, int type)
+                pcibus_t addr, pcibus_t size, int type)
 {
     E1000State *d = DO_UPCAST(E1000State, dev, pci_dev);
     int i;
diff --git a/hw/eepro100.c b/hw/eepro100.c
index 3f84e26..1a1a0da 100644
--- a/hw/eepro100.c
+++ b/hw/eepro100.c
@@ -1374,7 +1374,7 @@ static void ioport_write4(void *opaque, uint32_t addr, uint32_t val)
 /* PCI EEPRO100 definitions */
 
 static void pci_map(PCIDevice * pci_dev, int region_num,
-                    uint32_t addr, uint32_t size, int type)
+                    pcibus_t addr, pcibus_t size, int type)
 {
     EEPRO100State *s = DO_UPCAST(EEPRO100State, dev, pci_dev);
 
@@ -1453,7 +1453,7 @@ static CPUReadMemoryFunc * const pci_mmio_read[] = {
 };
 
 static void pci_mmio_map(PCIDevice * pci_dev, int region_num,
-                         uint32_t addr, uint32_t size, int type)
+                         pcibus_t addr, pcibus_t size, int type)
 {
     EEPRO100State *s = DO_UPCAST(EEPRO100State, dev, pci_dev);
 
diff --git a/hw/es1370.c b/hw/es1370.c
index 9071a48..b42809d 100644
--- a/hw/es1370.c
+++ b/hw/es1370.c
@@ -907,7 +907,7 @@ static void es1370_adc_callback (void *opaque, int avail)
 }
 
 static void es1370_map (PCIDevice *pci_dev, int region_num,
-                        uint32_t addr, uint32_t size, int type)
+                        pcibus_t addr, pcibus_t size, int type)
 {
     ES1370State *s = DO_UPCAST (ES1370State, dev, pci_dev);
 
diff --git a/hw/ide/pci.c b/hw/ide/pci.c
index 89ecd44..125f04d 100644
--- a/hw/ide/pci.c
+++ b/hw/ide/pci.c
@@ -60,7 +60,7 @@ typedef struct PCIIDEState {
 static void cmd646_update_irq(PCIIDEState *d);
 
 static void ide_map(PCIDevice *pci_dev, int region_num,
-                    uint32_t addr, uint32_t size, int type)
+                    pcibus_t addr, pcibus_t size, int type)
 {
     PCIIDEState *d = (PCIIDEState *)pci_dev;
     IDEBus *bus;
@@ -245,7 +245,7 @@ static void bmdma_addr_writel(void *opaque, uint32_t addr, uint32_t val)
 }
 
 static void bmdma_map(PCIDevice *pci_dev, int region_num,
-                    uint32_t addr, uint32_t size, int type)
+                    pcibus_t addr, pcibus_t size, int type)
 {
     PCIIDEState *d = (PCIIDEState *)pci_dev;
     int i;
diff --git a/hw/lsi53c895a.c b/hw/lsi53c895a.c
index 62bdca8..d62581a 100644
--- a/hw/lsi53c895a.c
+++ b/hw/lsi53c895a.c
@@ -1926,7 +1926,7 @@ static void lsi_io_writel(void *opaque, uint32_t addr, uint32_t val)
 }
 
 static void lsi_io_mapfunc(PCIDevice *pci_dev, int region_num,
-                           uint32_t addr, uint32_t size, int type)
+                           pcibus_t addr, pcibus_t size, int type)
 {
     LSIState *s = DO_UPCAST(LSIState, dev, pci_dev);
 
@@ -1941,7 +1941,7 @@ static void lsi_io_mapfunc(PCIDevice *pci_dev, int region_num,
 }
 
 static void lsi_ram_mapfunc(PCIDevice *pci_dev, int region_num,
-                            uint32_t addr, uint32_t size, int type)
+                            pcibus_t addr, pcibus_t size, int type)
 {
     LSIState *s = DO_UPCAST(LSIState, dev, pci_dev);
 
@@ -1951,7 +1951,7 @@ static void lsi_ram_mapfunc(PCIDevice *pci_dev, int region_num,
 }
 
 static void lsi_mmio_mapfunc(PCIDevice *pci_dev, int region_num,
-                             uint32_t addr, uint32_t size, int type)
+                             pcibus_t addr, pcibus_t size, int type)
 {
     LSIState *s = DO_UPCAST(LSIState, dev, pci_dev);
 
diff --git a/hw/macio.c b/hw/macio.c
index 8cfadfc..f3340da 100644
--- a/hw/macio.c
+++ b/hw/macio.c
@@ -40,7 +40,7 @@ struct macio_state_t {
 };
 
 static void macio_map (PCIDevice *pci_dev, int region_num,
-                       uint32_t addr, uint32_t size, int type)
+                       pcibus_t addr, pcibus_t size, int type)
 {
     macio_state_t *macio_state;
     int i;
diff --git a/hw/msix.c b/hw/msix.c
index 3782994..4300c4e 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -201,7 +201,7 @@ static CPUReadMemoryFunc * const msix_mmio_read[] = {
 
 /* Should be called from device's map method. */
 void msix_mmio_map(PCIDevice *d, int region_num,
-                   uint32_t addr, uint32_t size, int type)
+                   pcibus_t addr, pcibus_t size, int type)
 {
     uint8_t *config = d->config + d->msix_cap;
     uint32_t table = pci_get_long(config + MSIX_TABLE_OFFSET);
diff --git a/hw/msix.h b/hw/msix.h
index 9367ba3..2ff754a 100644
--- a/hw/msix.h
+++ b/hw/msix.h
@@ -2,6 +2,7 @@
 #define QEMU_MSIX_H
 
 #include "qemu-common.h"
+#include "pci.h"
 
 int msix_init(struct PCIDevice *dev, unsigned short nentries,
               unsigned bar_nr, unsigned bar_size,
@@ -11,7 +12,7 @@ void msix_write_config(PCIDevice *pci_dev, uint32_t address,
                        uint32_t val, int len);
 
 void msix_mmio_map(PCIDevice *pci_dev, int region_num,
-                   uint32_t addr, uint32_t size, int type);
+                   pcibus_t addr, pcibus_t size, int type);
 
 int msix_uninit(PCIDevice *d);
 
diff --git a/hw/ne2000.c b/hw/ne2000.c
index 87f1e59..d77ea73 100644
--- a/hw/ne2000.c
+++ b/hw/ne2000.c
@@ -715,7 +715,7 @@ static int pci_ne2000_load(QEMUFile* f, void* opaque, int version_id)
 /* PCI NE2000 definitions */
 
 static void ne2000_map(PCIDevice *pci_dev, int region_num,
-                       uint32_t addr, uint32_t size, int type)
+                       pcibus_t addr, pcibus_t size, int type)
 {
     PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
     NE2000State *s = &d->ne2000;
diff --git a/hw/openpic.c b/hw/openpic.c
index 74dde6d..a2f3990 100644
--- a/hw/openpic.c
+++ b/hw/openpic.c
@@ -1026,7 +1026,7 @@ static CPUReadMemoryFunc * const openpic_read[] = {
 };
 
 static void openpic_map(PCIDevice *pci_dev, int region_num,
-                        uint32_t addr, uint32_t size, int type)
+                        pcibus_t addr, pcibus_t size, int type)
 {
     openpic_t *opp;
 
diff --git a/hw/pci.c b/hw/pci.c
index 21e23b0..674daba 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -396,12 +396,12 @@ int pci_unregister_device(PCIDevice *pci_dev)
 }
 
 void pci_register_bar(PCIDevice *pci_dev, int region_num,
-                            uint32_t size, int type,
+                            pcibus_t size, int type,
                             PCIMapIORegionFunc *map_func)
 {
     PCIIORegion *r;
     uint32_t addr;
-    uint32_t wmask;
+    pcibus_t wmask;
 
     if ((unsigned int)region_num >= PCI_NUM_REGIONS)
         return;
@@ -435,7 +435,8 @@ static void pci_update_mappings(PCIDevice *d)
 {
     PCIIORegion *r;
     int cmd, i;
-    uint32_t last_addr, new_addr, config_ofs;
+    pcibus_t last_addr, new_addr;
+    uint32_t config_ofs;
 
     cmd = pci_get_word(d->config + PCI_COMMAND);
     for(i = 0; i < PCI_NUM_REGIONS; i++) {
diff --git a/hw/pci.h b/hw/pci.h
index 6d2172c..2796c1d 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -71,12 +71,14 @@ extern target_phys_addr_t pci_mem_base;
 #define PCI_DEVICE_ID_VIRTIO_BALLOON     0x1002
 #define PCI_DEVICE_ID_VIRTIO_CONSOLE     0x1003
 
+typedef uint32_t pcibus_t;
+
 typedef void PCIConfigWriteFunc(PCIDevice *pci_dev,
                                 uint32_t address, uint32_t data, int len);
 typedef uint32_t PCIConfigReadFunc(PCIDevice *pci_dev,
                                    uint32_t address, int len);
 typedef void PCIMapIORegionFunc(PCIDevice *pci_dev, int region_num,
-                                uint32_t addr, uint32_t size, int type);
+                                pcibus_t addr, pcibus_t size, int type);
 typedef int PCIUnregisterFunc(PCIDevice *pci_dev);
 
 #define PCI_ADDRESS_SPACE_MEM		0x00
@@ -84,9 +86,9 @@ typedef int PCIUnregisterFunc(PCIDevice *pci_dev);
 #define PCI_ADDRESS_SPACE_MEM_PREFETCH	0x08
 
 typedef struct PCIIORegion {
-    uint32_t addr; /* current PCI mapping address. -1 means not mapped */
-#define PCI_BAR_UNMAPPED (~(uint32_t)0)
-    uint32_t size;
+    pcibus_t addr; /* current PCI mapping address. -1 means not mapped */
+#define PCI_BAR_UNMAPPED (~(pcibus_t)0)
+    pcibus_t size;
     uint8_t type;
     PCIMapIORegionFunc *map_func;
 } PCIIORegion;
@@ -233,7 +235,7 @@ PCIDevice *pci_register_device(PCIBus *bus, const char *name,
 int pci_unregister_device(PCIDevice *pci_dev);
 
 void pci_register_bar(PCIDevice *pci_dev, int region_num,
-                            uint32_t size, int type,
+                            pcibus_t size, int type,
                             PCIMapIORegionFunc *map_func);
 
 int pci_add_capability(PCIDevice *pci_dev, uint8_t cap_id, uint8_t cap_size);
diff --git a/hw/pcnet.c b/hw/pcnet.c
index ae98a20..2789574 100644
--- a/hw/pcnet.c
+++ b/hw/pcnet.c
@@ -1761,7 +1761,7 @@ static uint32_t pcnet_ioport_readl(void *opaque, uint32_t addr)
 }
 
 static void pcnet_ioport_map(PCIDevice *pci_dev, int region_num,
-                             uint32_t addr, uint32_t size, int type)
+                             pcibus_t addr, pcibus_t size, int type)
 {
     PCNetState *d = &DO_UPCAST(PCIPCNetState, pci_dev, pci_dev)->state;
 
@@ -1989,7 +1989,7 @@ static CPUReadMemoryFunc * const pcnet_mmio_read[] = {
 };
 
 static void pcnet_mmio_map(PCIDevice *pci_dev, int region_num,
-                            uint32_t addr, uint32_t size, int type)
+                            pcibus_t addr, pcibus_t size, int type)
 {
     PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev, pci_dev);
 
diff --git a/hw/rtl8139.c b/hw/rtl8139.c
index 83cb1ff..6856b23 100644
--- a/hw/rtl8139.c
+++ b/hw/rtl8139.c
@@ -3324,7 +3324,7 @@ static int rtl8139_load(QEMUFile* f,void* opaque,int version_id)
 /* PCI RTL8139 definitions */
 
 static void rtl8139_mmio_map(PCIDevice *pci_dev, int region_num,
-                       uint32_t addr, uint32_t size, int type)
+                       pcibus_t addr, pcibus_t size, int type)
 {
     RTL8139State *s = DO_UPCAST(RTL8139State, dev, pci_dev);
 
@@ -3332,7 +3332,7 @@ static void rtl8139_mmio_map(PCIDevice *pci_dev, int region_num,
 }
 
 static void rtl8139_ioport_map(PCIDevice *pci_dev, int region_num,
-                       uint32_t addr, uint32_t size, int type)
+                       pcibus_t addr, pcibus_t size, int type)
 {
     RTL8139State *s = DO_UPCAST(RTL8139State, dev, pci_dev);
 
diff --git a/hw/sun4u.c b/hw/sun4u.c
index 2c97d9d..5812782 100644
--- a/hw/sun4u.c
+++ b/hw/sun4u.c
@@ -344,7 +344,7 @@ static const int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
 static const int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
 
 static void ebus_mmio_mapfunc(PCIDevice *pci_dev, int region_num,
-                              uint32_t addr, uint32_t size, int type)
+                              pcibus_t addr, pcibus_t size, int type)
 {
     DPRINTF("Mapping region %d registers at %08x\n", region_num, addr);
     switch (region_num) {
diff --git a/hw/usb-ohci.c b/hw/usb-ohci.c
index 6e428c4..7a92efd 100644
--- a/hw/usb-ohci.c
+++ b/hw/usb-ohci.c
@@ -1707,7 +1707,7 @@ typedef struct {
 } OHCIPCIState;
 
 static void ohci_mapfunc(PCIDevice *pci_dev, int i,
-            uint32_t addr, uint32_t size, int type)
+            pcibus_t addr, pcibus_t size, int type)
 {
     OHCIPCIState *ohci = DO_UPCAST(OHCIPCIState, pci_dev, pci_dev);
     cpu_register_physical_memory(addr, size, ohci->state.mem);
diff --git a/hw/usb-uhci.c b/hw/usb-uhci.c
index 6807413..abeb552 100644
--- a/hw/usb-uhci.c
+++ b/hw/usb-uhci.c
@@ -1059,7 +1059,7 @@ static void uhci_frame_timer(void *opaque)
 }
 
 static void uhci_map(PCIDevice *pci_dev, int region_num,
-                    uint32_t addr, uint32_t size, int type)
+                    pcibus_t addr, pcibus_t size, int type)
 {
     UHCIState *s = (UHCIState *)pci_dev;
 
diff --git a/hw/vga-pci.c b/hw/vga-pci.c
index 6038cec..b0e4262 100644
--- a/hw/vga-pci.c
+++ b/hw/vga-pci.c
@@ -71,7 +71,7 @@ void vga_dirty_log_start(VGACommonState *s)
 }
 
 static void vga_map(PCIDevice *pci_dev, int region_num,
-                    uint32_t addr, uint32_t size, int type)
+                    pcibus_t addr, pcibus_t size, int type)
 {
     PCIVGAState *d = (PCIVGAState *)pci_dev;
     VGACommonState *s = &d->vga;
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index bd5a7c4..e68823a 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -342,7 +342,7 @@ static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
 }
 
 static void virtio_map(PCIDevice *pci_dev, int region_num,
-                       uint32_t addr, uint32_t size, int type)
+                       pcibus_t addr, pcibus_t size, int type)
 {
     VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
     VirtIODevice *vdev = proxy->vdev;
diff --git a/hw/vmware_vga.c b/hw/vmware_vga.c
index a273f35..945d57e 100644
--- a/hw/vmware_vga.c
+++ b/hw/vmware_vga.c
@@ -1174,7 +1174,7 @@ static int pci_vmsvga_load(QEMUFile *f, void *opaque, int version_id)
 }
 
 static void pci_vmsvga_map_ioport(PCIDevice *pci_dev, int region_num,
-                uint32_t addr, uint32_t size, int type)
+                pcibus_t addr, pcibus_t size, int type)
 {
     struct pci_vmsvga_state_s *d = (struct pci_vmsvga_state_s *) pci_dev;
     struct vmsvga_state_s *s = &d->chip;
@@ -1194,7 +1194,7 @@ static void pci_vmsvga_map_ioport(PCIDevice *pci_dev, int region_num,
 }
 
 static void pci_vmsvga_map_mem(PCIDevice *pci_dev, int region_num,
-                uint32_t addr, uint32_t size, int type)
+                pcibus_t addr, pcibus_t size, int type)
 {
     struct pci_vmsvga_state_s *d = (struct pci_vmsvga_state_s *) pci_dev;
     struct vmsvga_state_s *s = &d->chip;
diff --git a/hw/wdt_i6300esb.c b/hw/wdt_i6300esb.c
index 3abaa87..d3ab3c8 100644
--- a/hw/wdt_i6300esb.c
+++ b/hw/wdt_i6300esb.c
@@ -347,7 +347,7 @@ static void i6300esb_mem_writel(void *vp, target_phys_addr_t addr, uint32_t val)
 }
 
 static void i6300esb_map(PCIDevice *dev, int region_num,
-                         uint32_t addr, uint32_t size, int type)
+                         pcibus_t addr, pcibus_t size, int type)
 {
     static CPUReadMemoryFunc * const mem_read[3] = {
         i6300esb_mem_readb,
