diff --git a/exec.c b/exec.c
index af1e89d..a338495 100644
--- a/exec.c
+++ b/exec.c
@@ -3331,7 +3331,8 @@ static subpage_t *subpage_init (target_phys_addr_t base, ram_addr_t *phys,
     mmio = qemu_mallocz(sizeof(subpage_t));
 
     mmio->base = base;
-    subpage_memory = cpu_register_io_memory(subpage_read, subpage_write, mmio);
+    subpage_memory = cpu_register_io_memory(subpage_read, subpage_write, mmio,
+                                            DEVICE_NATIVE_ENDIAN);
 #if defined(DEBUG_SUBPAGE)
     printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__,
            mmio, base, TARGET_PAGE_SIZE, subpage_memory);
@@ -3468,7 +3469,6 @@ static int cpu_register_io_memory_fixed(int io_index,
                                         void *opaque, enum device_endian endian)
 {
     int i;
-    int endian = DEVICE_NATIVE_ENDIAN;
 
     if (io_index <= 0) {
         io_index = get_free_io_mem_idx();
@@ -3513,7 +3513,7 @@ int cpu_register_io_memory(CPUReadMemoryFunc * const *mem_read,
                            CPUWriteMemoryFunc * const *mem_write,
                            void *opaque, enum device_endian endian)
 {
-    return cpu_register_io_memory_fixed(0, mem_read, mem_write, opaque);
+    return cpu_register_io_memory_fixed(0, mem_read, mem_write, opaque, endian);
 }
 
 void cpu_unregister_io_memory(int io_table_address)
@@ -3535,14 +3535,21 @@ static void io_mem_init(void)
 {
     int i;
 
-    cpu_register_io_memory_fixed(IO_MEM_ROM, error_mem_read, unassigned_mem_write, NULL);
-    cpu_register_io_memory_fixed(IO_MEM_UNASSIGNED, unassigned_mem_read, unassigned_mem_write, NULL);
-    cpu_register_io_memory_fixed(IO_MEM_NOTDIRTY, error_mem_read, notdirty_mem_write, NULL);
+    cpu_register_io_memory_fixed(IO_MEM_ROM, error_mem_read,
+                                 unassigned_mem_write, NULL,
+                                 DEVICE_NATIVE_ENDIAN);
+    cpu_register_io_memory_fixed(IO_MEM_UNASSIGNED, unassigned_mem_read,
+                                 unassigned_mem_write, NULL,
+                                 DEVICE_NATIVE_ENDIAN);
+    cpu_register_io_memory_fixed(IO_MEM_NOTDIRTY, error_mem_read,
+                                 notdirty_mem_write, NULL,
+                                 DEVICE_NATIVE_ENDIAN);
     for (i=0; i<5; i++)
         io_mem_used[i] = 1;
 
     io_mem_watch = cpu_register_io_memory(watch_mem_read,
-                                          watch_mem_write, NULL);
+                                          watch_mem_write, NULL,
+                                          DEVICE_NATIVE_ENDIAN);
 }
 
 #endif /* !defined(CONFIG_USER_ONLY) */
diff --git a/hw/apb_pci.c b/hw/apb_pci.c
index c619112..bf00c71 100644
--- a/hw/apb_pci.c
+++ b/hw/apb_pci.c
@@ -410,7 +410,8 @@ static int pci_pbm_init_device(SysBusDevice *dev)
 
     /* apb_config */
     apb_config = cpu_register_io_memory(apb_config_read,
-                                        apb_config_write, s);
+                                        apb_config_write, s,
+                                        DEVICE_NATIVE_ENDIAN);
     /* at region 0 */
     sysbus_init_mmio(dev, 0x10000ULL, apb_config);
 
@@ -424,7 +425,8 @@ static int pci_pbm_init_device(SysBusDevice *dev)
 
     /* pci_ioport */
     pci_ioport = cpu_register_io_memory(pci_apb_ioread,
-                                        pci_apb_iowrite, s);
+                                        pci_apb_iowrite, s,
+                                        DEVICE_NATIVE_ENDIAN);
     /* at region 2 */
     sysbus_init_mmio(dev, 0x10000ULL, pci_ioport);
 
diff --git a/hw/apic.c b/hw/apic.c
index 5f4a87c..a5a53fb 100644
--- a/hw/apic.c
+++ b/hw/apic.c
@@ -980,7 +980,8 @@ static int apic_init1(SysBusDevice *dev)
         return -1;
     }
     apic_io_memory = cpu_register_io_memory(apic_mem_read,
-                                            apic_mem_write, NULL);
+                                            apic_mem_write, NULL,
+                                            DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MSI_ADDR_SIZE, apic_io_memory);
 
     s->timer = qemu_new_timer(vm_clock, apic_timer, s);
diff --git a/hw/arm_gic.c b/hw/arm_gic.c
index 8286a28..e6b1953 100644
--- a/hw/arm_gic.c
+++ b/hw/arm_gic.c
@@ -742,7 +742,8 @@ static void gic_init(gic_state *s)
         sysbus_init_irq(&s->busdev, &s->parent_irq[i]);
     }
     s->iomemtype = cpu_register_io_memory(gic_dist_readfn,
-                                          gic_dist_writefn, s);
+                                          gic_dist_writefn, s,
+                                          DEVICE_NATIVE_ENDIAN);
     gic_reset(s);
     register_savevm(NULL, "arm_gic", -1, 1, gic_save, gic_load, s);
 }
diff --git a/hw/arm_sysctl.c b/hw/arm_sysctl.c
index 0cb2ffc..bd0664f 100644
--- a/hw/arm_sysctl.c
+++ b/hw/arm_sysctl.c
@@ -208,7 +208,8 @@ static int arm_sysctl_init1(SysBusDevice *dev)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(arm_sysctl_readfn,
-                                       arm_sysctl_writefn, s);
+                                       arm_sysctl_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     /* ??? Save/restore.  */
     return 0;
diff --git a/hw/arm_timer.c b/hw/arm_timer.c
index f009e9e..82f05de 100644
--- a/hw/arm_timer.c
+++ b/hw/arm_timer.c
@@ -269,7 +269,7 @@ static int sp804_init(SysBusDevice *dev)
     s->timer[0]->irq = qi[0];
     s->timer[1]->irq = qi[1];
     iomemtype = cpu_register_io_memory(sp804_readfn,
-                                       sp804_writefn, s);
+                                       sp804_writefn, s, DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     register_savevm(&dev->qdev, "sp804", -1, 1, sp804_save, sp804_load, s);
     return 0;
@@ -340,7 +340,8 @@ static int icp_pit_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->timer[2]->irq);
 
     iomemtype = cpu_register_io_memory(icp_pit_readfn,
-                                       icp_pit_writefn, s);
+                                       icp_pit_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     /* This device has no state to save/restore.  The component timers will
        save themselves.  */
diff --git a/hw/armv7m.c b/hw/armv7m.c
index 588ec98..304cd34 100644
--- a/hw/armv7m.c
+++ b/hw/armv7m.c
@@ -130,7 +130,7 @@ static int bitband_init(SysBusDevice *dev)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(bitband_readfn, bitband_writefn,
-                                       &s->base);
+                                       &s->base, DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x02000000, iomemtype);
     return 0;
 }
diff --git a/hw/axis_dev88.c b/hw/axis_dev88.c
index f16c76a..57b5e2f 100644
--- a/hw/axis_dev88.c
+++ b/hw/axis_dev88.c
@@ -280,11 +280,13 @@ void axisdev88_init (ram_addr_t ram_size,
 
       /* Attach a NAND flash to CS1.  */
     nand_state.nand = nand_init(NAND_MFR_STMICRO, 0x39);
-    nand_regs = cpu_register_io_memory(nand_read, nand_write, &nand_state);
+    nand_regs = cpu_register_io_memory(nand_read, nand_write, &nand_state,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0x10000000, 0x05000000, nand_regs);
 
     gpio_state.nand = &nand_state;
-    gpio_regs = cpu_register_io_memory(gpio_read, gpio_write, &gpio_state);
+    gpio_regs = cpu_register_io_memory(gpio_read, gpio_write, &gpio_state,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0x3001a000, 0x5c, gpio_regs);
 
 
diff --git a/hw/bonito.c b/hw/bonito.c
index dcf0311..fd90527 100644
--- a/hw/bonito.c
+++ b/hw/bonito.c
@@ -698,7 +698,8 @@ static int bonito_initfn(PCIDevice *dev)
     pci_config_set_revision(dev->config, 0x01);
 
     /* set the north bridge register mapping */
-    s->bonito_reg_handle = cpu_register_io_memory(bonito_read, bonito_write, s);
+    s->bonito_reg_handle = cpu_register_io_memory(bonito_read, bonito_write, s,
+                                                  DEVICE_NATIVE_ENDIAN);
     s->bonito_reg_start = BONITO_INTERNAL_REG_BASE;
     s->bonito_reg_length = BONITO_INTERNAL_REG_SIZE;
     cpu_register_physical_memory(s->bonito_reg_start, s->bonito_reg_length,
@@ -706,7 +707,8 @@ static int bonito_initfn(PCIDevice *dev)
 
     /* set the north bridge pci configure  mapping */
     s->bonito_pciconf_handle = cpu_register_io_memory(bonito_pciconf_read,
-                                                      bonito_pciconf_write, s);
+                                                      bonito_pciconf_write, s,
+                                                      DEVICE_NATIVE_ENDIAN);
     s->bonito_pciconf_start = BONITO_PCICONFIG_BASE;
     s->bonito_pciconf_length = BONITO_PCICONFIG_SIZE;
     cpu_register_physical_memory(s->bonito_pciconf_start, s->bonito_pciconf_length,
@@ -714,21 +716,24 @@ static int bonito_initfn(PCIDevice *dev)
 
     /* set the south bridge pci configure  mapping */
     s->bonito_spciconf_handle = cpu_register_io_memory(bonito_spciconf_read,
-                                                       bonito_spciconf_write, s);
+                                                       bonito_spciconf_write, s,
+                                                       DEVICE_NATIVE_ENDIAN);
     s->bonito_spciconf_start = BONITO_SPCICONFIG_BASE;
     s->bonito_spciconf_length = BONITO_SPCICONFIG_SIZE;
     cpu_register_physical_memory(s->bonito_spciconf_start, s->bonito_spciconf_length,
                                  s->bonito_spciconf_handle);
 
     s->bonito_ldma_handle = cpu_register_io_memory(bonito_ldma_read,
-                                                   bonito_ldma_write, s);
+                                                   bonito_ldma_write, s,
+                                                   DEVICE_NATIVE_ENDIAN);
     s->bonito_ldma_start = 0xbfe00200;
     s->bonito_ldma_length = 0x100;
     cpu_register_physical_memory(s->bonito_ldma_start, s->bonito_ldma_length,
                                  s->bonito_ldma_handle);
 
     s->bonito_cop_handle = cpu_register_io_memory(bonito_cop_read,
-                                                  bonito_cop_write, s);
+                                                  bonito_cop_write, s,
+                                                  DEVICE_NATIVE_ENDIAN);
     s->bonito_cop_start = 0xbfe00300;
     s->bonito_cop_length = 0x100;
     cpu_register_physical_memory(s->bonito_cop_start, s->bonito_cop_length,
diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
index 40be55d..4f5040c 100644
--- a/hw/cirrus_vga.c
+++ b/hw/cirrus_vga.c
@@ -3076,23 +3076,27 @@ static void cirrus_init_common(CirrusVGAState * s, int device_id, int is_pci)
     register_ioport_read(0x3da, 1, 1, cirrus_vga_ioport_read, s);
 
     s->vga.vga_io_memory = cpu_register_io_memory(cirrus_vga_mem_read,
-                                                  cirrus_vga_mem_write, s);
+                                                  cirrus_vga_mem_write, s,
+                                                  DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(isa_mem_base + 0x000a0000, 0x20000,
                                  s->vga.vga_io_memory);
     qemu_register_coalesced_mmio(isa_mem_base + 0x000a0000, 0x20000);
 
     /* I/O handler for LFB */
     s->cirrus_linear_io_addr =
-        cpu_register_io_memory(cirrus_linear_read, cirrus_linear_write, s);
+        cpu_register_io_memory(cirrus_linear_read, cirrus_linear_write, s,
+                               DEVICE_NATIVE_ENDIAN);
 
     /* I/O handler for LFB */
     s->cirrus_linear_bitblt_io_addr =
         cpu_register_io_memory(cirrus_linear_bitblt_read,
-                               cirrus_linear_bitblt_write, s);
+                               cirrus_linear_bitblt_write, s,
+                               DEVICE_NATIVE_ENDIAN);
 
     /* I/O handler for memory-mapped I/O */
     s->cirrus_mmio_io_addr =
-        cpu_register_io_memory(cirrus_mmio_read, cirrus_mmio_write, s);
+        cpu_register_io_memory(cirrus_mmio_read, cirrus_mmio_write, s,
+                               DEVICE_NATIVE_ENDIAN);
 
     s->real_vram_size =
         (s->device_id == CIRRUS_ID_CLGD5446) ? 4096 * 1024 : 2048 * 1024;
diff --git a/hw/cs4231.c b/hw/cs4231.c
index 2977101..a65b697 100644
--- a/hw/cs4231.c
+++ b/hw/cs4231.c
@@ -148,7 +148,8 @@ static int cs4231_init1(SysBusDevice *dev)
     int io;
     CSState *s = FROM_SYSBUS(CSState, dev);
 
-    io = cpu_register_io_memory(cs_mem_read, cs_mem_write, s);
+    io = cpu_register_io_memory(cs_mem_read, cs_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, CS_SIZE, io);
     sysbus_init_irq(dev, &s->irq);
 
diff --git a/hw/cuda.c b/hw/cuda.c
index 3f238b6..e4c178d 100644
--- a/hw/cuda.c
+++ b/hw/cuda.c
@@ -762,7 +762,8 @@ void cuda_init (int *cuda_mem_index, qemu_irq irq)
     s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
 
     s->adb_poll_timer = qemu_new_timer(vm_clock, cuda_adb_poll, s);
-    *cuda_mem_index = cpu_register_io_memory(cuda_read, cuda_write, s);
+    *cuda_mem_index = cpu_register_io_memory(cuda_read, cuda_write, s,
+                                             DEVICE_NATIVE_ENDIAN);
     register_savevm(NULL, "cuda", -1, 1, cuda_save, cuda_load, s);
     qemu_register_reset(cuda_reset, s);
 }
diff --git a/hw/dp8393x.c b/hw/dp8393x.c
index e65e4d1..0ef8abe 100644
--- a/hw/dp8393x.c
+++ b/hw/dp8393x.c
@@ -908,6 +908,7 @@ void dp83932_init(NICInfo *nd, target_phys_addr_t base, int it_shift,
     qemu_register_reset(nic_reset, s);
     nic_reset(s);
 
-    s->mmio_index = cpu_register_io_memory(dp8393x_read, dp8393x_write, s);
+    s->mmio_index = cpu_register_io_memory(dp8393x_read, dp8393x_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x40 << it_shift, s->mmio_index);
 }
diff --git a/hw/ds1225y.c b/hw/ds1225y.c
index 009d127..b1c5232 100644
--- a/hw/ds1225y.c
+++ b/hw/ds1225y.c
@@ -171,10 +171,12 @@ void *ds1225y_init(target_phys_addr_t mem_base, const char *filename)
     }
 
     /* Read/write memory */
-    mem_indexRW = cpu_register_io_memory(nvram_read, nvram_write, s);
+    mem_indexRW = cpu_register_io_memory(nvram_read, nvram_write, s,
+                                         DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(mem_base, s->chip_size, mem_indexRW);
     /* Read/write protected memory */
-    mem_indexRP = cpu_register_io_memory(nvram_read, nvram_write_protected, s);
+    mem_indexRP = cpu_register_io_memory(nvram_read, nvram_write_protected, s,
+                                         DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(mem_base + s->chip_size, s->chip_size, mem_indexRP);
     return s;
 }
diff --git a/hw/e1000.c b/hw/e1000.c
index 57d08cf..bf3f2d3 100644
--- a/hw/e1000.c
+++ b/hw/e1000.c
@@ -1131,7 +1131,7 @@ static int pci_e1000_init(PCIDevice *pci_dev)
     pci_conf[PCI_INTERRUPT_PIN] = 1; // interrupt pin 0
 
     d->mmio_index = cpu_register_io_memory(e1000_mmio_read,
-            e1000_mmio_write, d);
+            e1000_mmio_write, d, DEVICE_NATIVE_ENDIAN);
 
     pci_register_bar(&d->dev, 0, PNPMMIO_SIZE,
                            PCI_BASE_ADDRESS_SPACE_MEMORY, e1000_mmio_map);
diff --git a/hw/eccmemctl.c b/hw/eccmemctl.c
index a8042e9..2bda87b 100644
--- a/hw/eccmemctl.c
+++ b/hw/eccmemctl.c
@@ -297,12 +297,14 @@ static int ecc_init1(SysBusDevice *dev)
 
     sysbus_init_irq(dev, &s->irq);
     s->regs[0] = s->version;
-    ecc_io_memory = cpu_register_io_memory(ecc_mem_read, ecc_mem_write, s);
+    ecc_io_memory = cpu_register_io_memory(ecc_mem_read, ecc_mem_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, ECC_SIZE, ecc_io_memory);
 
     if (s->version == ECC_MCC) { // SS-600MP only
         ecc_io_memory = cpu_register_io_memory(ecc_diag_mem_read,
-                                               ecc_diag_mem_write, s);
+                                               ecc_diag_mem_write, s,
+                                               DEVICE_NATIVE_ENDIAN);
         sysbus_init_mmio(dev, ECC_DIAG_SIZE, ecc_io_memory);
     }
 
diff --git a/hw/eepro100.c b/hw/eepro100.c
index f8a700a..b31ad3e 100644
--- a/hw/eepro100.c
+++ b/hw/eepro100.c
@@ -1878,7 +1878,8 @@ static int e100_nic_init(PCIDevice *pci_dev)
 
     /* Handler for memory-mapped I/O */
     s->mmio_index =
-        cpu_register_io_memory(pci_mmio_read, pci_mmio_write, s);
+        cpu_register_io_memory(pci_mmio_read, pci_mmio_write, s,
+                               DEVICE_NATIVE_ENDIAN);
 
     pci_register_bar(&s->dev, 0, PCI_MEM_SIZE,
                            PCI_BASE_ADDRESS_SPACE_MEMORY |
diff --git a/hw/empty_slot.c b/hw/empty_slot.c
index ac1f6eb..664b8d9 100644
--- a/hw/empty_slot.c
+++ b/hw/empty_slot.c
@@ -73,7 +73,8 @@ static int empty_slot_init1(SysBusDevice *dev)
     ram_addr_t empty_slot_offset;
 
     empty_slot_offset = cpu_register_io_memory(empty_slot_read,
-                                               empty_slot_write, s);
+                                               empty_slot_write, s,
+                                               DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, s->size, empty_slot_offset | IO_MEM_RAM);
     return 0;
 }
diff --git a/hw/escc.c b/hw/escc.c
index 8714239..ba60636 100644
--- a/hw/escc.c
+++ b/hw/escc.c
@@ -914,7 +914,8 @@ static int escc_init1(SysBusDevice *dev)
     s->chn[0].otherchn = &s->chn[1];
     s->chn[1].otherchn = &s->chn[0];
 
-    io = cpu_register_io_memory(escc_mem_read, escc_mem_write, s);
+    io = cpu_register_io_memory(escc_mem_read, escc_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, ESCC_SIZE << s->it_shift, io);
     s->mmio_index = io;
 
diff --git a/hw/esp.c b/hw/esp.c
index 910fd31..fa9d2a2 100644
--- a/hw/esp.c
+++ b/hw/esp.c
@@ -722,7 +722,8 @@ static int esp_init1(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->irq);
     assert(s->it_shift != -1);
 
-    esp_io_memory = cpu_register_io_memory(esp_mem_read, esp_mem_write, s);
+    esp_io_memory = cpu_register_io_memory(esp_mem_read, esp_mem_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, ESP_REGS << s->it_shift, esp_io_memory);
 
     qdev_init_gpio_in(&dev->qdev, esp_gpio_demux, 2);
diff --git a/hw/etraxfs_dma.c b/hw/etraxfs_dma.c
index 15c8ad3..c205ec1 100644
--- a/hw/etraxfs_dma.c
+++ b/hw/etraxfs_dma.c
@@ -750,7 +750,7 @@ void *etraxfs_dmac_init(target_phys_addr_t base, int nr_channels)
 	ctrl->nr_channels = nr_channels;
 	ctrl->channels = qemu_mallocz(sizeof ctrl->channels[0] * nr_channels);
 
-	ctrl->map = cpu_register_io_memory(dma_read, dma_write, ctrl);
+	ctrl->map = cpu_register_io_memory(dma_read, dma_write, ctrl, DEVICE_NATIVE_ENDIAN);
 	cpu_register_physical_memory(base, nr_channels * 0x2000, ctrl->map);
 	return ctrl;
 }
diff --git a/hw/etraxfs_eth.c b/hw/etraxfs_eth.c
index ade96f1..6aa4007 100644
--- a/hw/etraxfs_eth.c
+++ b/hw/etraxfs_eth.c
@@ -598,7 +598,8 @@ void *etraxfs_eth_init(NICInfo *nd, target_phys_addr_t base, int phyaddr)
 	tdk_init(&eth->phy);
 	mdio_attach(&eth->mdio_bus, &eth->phy, eth->phyaddr);
 
-	eth->ethregs = cpu_register_io_memory(eth_read, eth_write, eth);
+	eth->ethregs = cpu_register_io_memory(eth_read, eth_write, eth,
+                                              DEVICE_NATIVE_ENDIAN);
 	cpu_register_physical_memory (base, 0x5c, eth->ethregs);
 
 	memcpy(eth->conf.macaddr.a, nd->macaddr, sizeof(nd->macaddr));
diff --git a/hw/etraxfs_pic.c b/hw/etraxfs_pic.c
index b2c4859..4feffda 100644
--- a/hw/etraxfs_pic.c
+++ b/hw/etraxfs_pic.c
@@ -145,7 +145,8 @@ static int etraxfs_pic_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->parent_irq);
     sysbus_init_irq(dev, &s->parent_nmi);
 
-    intr_vect_regs = cpu_register_io_memory(pic_read, pic_write, s);
+    intr_vect_regs = cpu_register_io_memory(pic_read, pic_write, s,
+                                            DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, R_MAX * 4, intr_vect_regs);
     return 0;
 }
diff --git a/hw/etraxfs_ser.c b/hw/etraxfs_ser.c
index 336cc54..2787ebd 100644
--- a/hw/etraxfs_ser.c
+++ b/hw/etraxfs_ser.c
@@ -200,7 +200,8 @@ static int etraxfs_ser_init(SysBusDevice *dev)
     s->regs[RS_STAT_DIN] |= (1 << STAT_TR_IDLE);
 
     sysbus_init_irq(dev, &s->irq);
-    ser_regs = cpu_register_io_memory(ser_read, ser_write, s);
+    ser_regs = cpu_register_io_memory(ser_read, ser_write, s,
+                                      DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, R_MAX * 4, ser_regs);
     s->chr = qdev_init_chardev(&dev->qdev);
     if (s->chr)
diff --git a/hw/etraxfs_timer.c b/hw/etraxfs_timer.c
index 87700d4..ba1adbe 100644
--- a/hw/etraxfs_timer.c
+++ b/hw/etraxfs_timer.c
@@ -323,7 +323,8 @@ static int etraxfs_timer_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &t->irq);
     sysbus_init_irq(dev, &t->nmi);
 
-    timer_regs = cpu_register_io_memory(timer_read, timer_write, t);
+    timer_regs = cpu_register_io_memory(timer_read, timer_write, t,
+                                        DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x5c, timer_regs);
 
     qemu_register_reset(etraxfs_timer_reset, t);
diff --git a/hw/fdc.c b/hw/fdc.c
index c159dcb..bea5af2 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -1999,7 +1999,8 @@ static int sysbus_fdc_init1(SysBusDevice *dev)
     int io;
     int ret;
 
-    io = cpu_register_io_memory(fdctrl_mem_read, fdctrl_mem_write, fdctrl);
+    io = cpu_register_io_memory(fdctrl_mem_read, fdctrl_mem_write, fdctrl,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x08, io);
     sysbus_init_irq(dev, &fdctrl->irq);
     qdev_init_gpio_in(&dev->qdev, fdctrl_handle_tc, 1);
@@ -2017,7 +2018,8 @@ static int sun4m_fdc_init1(SysBusDevice *dev)
     int io;
 
     io = cpu_register_io_memory(fdctrl_mem_read_strict,
-                                fdctrl_mem_write_strict, fdctrl);
+                                fdctrl_mem_write_strict, fdctrl,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x08, io);
     sysbus_init_irq(dev, &fdctrl->irq);
     qdev_init_gpio_in(&dev->qdev, fdctrl_handle_tc, 1);
diff --git a/hw/fw_cfg.c b/hw/fw_cfg.c
index 72866ae..48b92d6 100644
--- a/hw/fw_cfg.c
+++ b/hw/fw_cfg.c
@@ -360,11 +360,13 @@ static int fw_cfg_init1(SysBusDevice *dev)
     int io_ctl_memory, io_data_memory;
 
     io_ctl_memory = cpu_register_io_memory(fw_cfg_ctl_mem_read,
-                                           fw_cfg_ctl_mem_write, s);
+                                           fw_cfg_ctl_mem_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, FW_CFG_SIZE, io_ctl_memory);
 
     io_data_memory = cpu_register_io_memory(fw_cfg_data_mem_read,
-                                            fw_cfg_data_mem_write, s);
+                                            fw_cfg_data_mem_write, s,
+                                            DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, FW_CFG_SIZE, io_data_memory);
 
     if (s->ctl_iobase) {
diff --git a/hw/g364fb.c b/hw/g364fb.c
index 3c8fb98..a41e988 100644
--- a/hw/g364fb.c
+++ b/hw/g364fb.c
@@ -607,7 +607,8 @@ int g364fb_mm_init(target_phys_addr_t vram_base,
 
     cpu_register_physical_memory(vram_base, s->vram_size, s->vram_offset);
 
-    io_ctrl = cpu_register_io_memory(g364fb_ctrl_read, g364fb_ctrl_write, s);
+    io_ctrl = cpu_register_io_memory(g364fb_ctrl_read, g364fb_ctrl_write, s,
+                                     DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(ctrl_base, 0x200000, io_ctrl);
 
     return 0;
diff --git a/hw/gt64xxx.c b/hw/gt64xxx.c
index cabf7ea..51e4db0 100644
--- a/hw/gt64xxx.c
+++ b/hw/gt64xxx.c
@@ -1116,7 +1116,8 @@ PCIBus *pci_gt64120_init(qemu_irq *pic)
     s->pci->bus = pci_register_bus(NULL, "pci",
                                    pci_gt64120_set_irq, pci_gt64120_map_irq,
                                    pic, PCI_DEVFN(18, 0), 4);
-    s->ISD_handle = cpu_register_io_memory(gt64120_read, gt64120_write, s);
+    s->ISD_handle = cpu_register_io_memory(gt64120_read, gt64120_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     d = pci_register_device(s->pci->bus, "GT64120 PCI Bus", sizeof(PCIDevice),
                             0, NULL, NULL);
 
diff --git a/hw/heathrow_pic.c b/hw/heathrow_pic.c
index cd86121..390b63c 100644
--- a/hw/heathrow_pic.c
+++ b/hw/heathrow_pic.c
@@ -222,7 +222,8 @@ qemu_irq *heathrow_pic_init(int *pmem_index,
     s = qemu_mallocz(sizeof(HeathrowPICS));
     /* only 1 CPU */
     s->irqs = irqs[0];
-    *pmem_index = cpu_register_io_memory(pic_read, pic_write, s);
+    *pmem_index = cpu_register_io_memory(pic_read, pic_write, s,
+                                         DEVICE_NATIVE_ENDIAN);
 
     register_savevm(NULL, "heathrow_pic", -1, 1, heathrow_pic_save,
                     heathrow_pic_load, s);
diff --git a/hw/hpet.c b/hw/hpet.c
index d5c406c..8fb6811 100644
--- a/hw/hpet.c
+++ b/hw/hpet.c
@@ -720,7 +720,8 @@ static int hpet_init(SysBusDevice *dev)
 
     /* HPET Area */
     iomemtype = cpu_register_io_memory(hpet_ram_read,
-                                       hpet_ram_write, s);
+                                       hpet_ram_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x400, iomemtype);
     return 0;
 }
diff --git a/hw/ide/macio.c b/hw/ide/macio.c
index bd1c73e..c1b4caa 100644
--- a/hw/ide/macio.c
+++ b/hw/ide/macio.c
@@ -320,7 +320,8 @@ int pmac_ide_init (DriveInfo **hd_table, qemu_irq irq,
         DBDMA_register_channel(dbdma, channel, dma_irq, pmac_ide_transfer, pmac_ide_flush, d);
 
     pmac_ide_memory = cpu_register_io_memory(pmac_ide_read,
-                                             pmac_ide_write, d);
+                                             pmac_ide_write, d,
+                                             DEVICE_NATIVE_ENDIAN);
     vmstate_register(NULL, 0, &vmstate_pmac, d);
     qemu_register_reset(pmac_ide_reset, d);
 
diff --git a/hw/ide/mmio.c b/hw/ide/mmio.c
index 9f20e8b..82b24b6 100644
--- a/hw/ide/mmio.c
+++ b/hw/ide/mmio.c
@@ -129,8 +129,10 @@ void mmio_ide_init (target_phys_addr_t membase, target_phys_addr_t membase2,
 
     s->shift = shift;
 
-    mem1 = cpu_register_io_memory(mmio_ide_reads, mmio_ide_writes, s);
-    mem2 = cpu_register_io_memory(mmio_ide_status, mmio_ide_cmd, s);
+    mem1 = cpu_register_io_memory(mmio_ide_reads, mmio_ide_writes, s,
+                                  DEVICE_NATIVE_ENDIAN);
+    mem2 = cpu_register_io_memory(mmio_ide_status, mmio_ide_cmd, s,
+                                  DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(membase, 16 << shift, mem1);
     cpu_register_physical_memory(membase2, 2 << shift, mem2);
     vmstate_register(NULL, 0, &vmstate_ide_mmio, s);
diff --git a/hw/integratorcp.c b/hw/integratorcp.c
index 3bf216b..b049940 100644
--- a/hw/integratorcp.c
+++ b/hw/integratorcp.c
@@ -256,7 +256,8 @@ static int integratorcm_init(SysBusDevice *dev)
     s->flash_offset = qemu_ram_alloc(NULL, "integrator.flash", 0x100000);
 
     iomemtype = cpu_register_io_memory(integratorcm_readfn,
-                                       integratorcm_writefn, s);
+                                       integratorcm_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x00800000, iomemtype);
     integratorcm_do_remap(s, 1);
     /* ??? Save/restore.  */
@@ -382,7 +383,8 @@ static int icp_pic_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->parent_irq);
     sysbus_init_irq(dev, &s->parent_fiq);
     iomemtype = cpu_register_io_memory(icp_pic_readfn,
-                                       icp_pic_writefn, s);
+                                       icp_pic_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x00800000, iomemtype);
     return 0;
 }
@@ -435,7 +437,8 @@ static void icp_control_init(uint32_t base)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(icp_control_readfn,
-                                       icp_control_writefn, NULL);
+                                       icp_control_writefn, NULL,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00800000, iomemtype);
     /* ??? Save/restore.  */
 }
diff --git a/hw/intel-hda.c b/hw/intel-hda.c
index fe31624..b2b6708 100644
--- a/hw/intel-hda.c
+++ b/hw/intel-hda.c
@@ -1156,7 +1156,8 @@ static int intel_hda_init(PCIDevice *pci)
     conf[0x40] = 0x01;
 
     d->mmio_addr = cpu_register_io_memory(intel_hda_mmio_read,
-                                          intel_hda_mmio_write, d);
+                                          intel_hda_mmio_write, d,
+                                          DEVICE_NATIVE_ENDIAN);
     pci_register_bar(&d->pci, 0, 0x4000, PCI_BASE_ADDRESS_SPACE_MEMORY,
                      intel_hda_map);
     if (d->msi) {
diff --git a/hw/ioapic.c b/hw/ioapic.c
index 5ae21e9..2109568 100644
--- a/hw/ioapic.c
+++ b/hw/ioapic.c
@@ -242,7 +242,8 @@ static int ioapic_init1(SysBusDevice *dev)
     int io_memory;
 
     io_memory = cpu_register_io_memory(ioapic_mem_read,
-                                       ioapic_mem_write, s);
+                                       ioapic_mem_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, io_memory);
 
     qdev_init_gpio_in(&dev->qdev, ioapic_set_irq, IOAPIC_NUM_PINS);
diff --git a/hw/isa_mmio.c b/hw/isa_mmio.c
index 66bdd2c..46458f4 100644
--- a/hw/isa_mmio.c
+++ b/hw/isa_mmio.c
@@ -131,11 +131,13 @@ void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size, int be)
         if (be) {
             isa_mmio_iomemtype = cpu_register_io_memory(isa_mmio_read_be,
                                                         isa_mmio_write_be,
-                                                        NULL);
+                                                        NULL,
+                                                        DEVICE_NATIVE_ENDIAN);
         } else {
             isa_mmio_iomemtype = cpu_register_io_memory(isa_mmio_read_le,
                                                         isa_mmio_write_le,
-                                                        NULL);
+                                                        NULL,
+                                                        DEVICE_NATIVE_ENDIAN);
         }
     }
     cpu_register_physical_memory(base, size, isa_mmio_iomemtype);
diff --git a/hw/ivshmem.c b/hw/ivshmem.c
index 06dce70..7b19a81 100644
--- a/hw/ivshmem.c
+++ b/hw/ivshmem.c
@@ -720,7 +720,7 @@ static int pci_ivshmem_init(PCIDevice *dev)
     s->shm_fd = 0;
 
     s->ivshmem_mmio_io_addr = cpu_register_io_memory(ivshmem_mmio_read,
-                                    ivshmem_mmio_write, s);
+                                    ivshmem_mmio_write, s, DEVICE_NATIVE_ENDIAN);
     /* region for registers*/
     pci_register_bar(&s->dev, 0, IVSHMEM_REG_BAR_SIZE,
                            PCI_BASE_ADDRESS_SPACE_MEMORY, ivshmem_mmio_map);
diff --git a/hw/jazz_led.c b/hw/jazz_led.c
index 4cb680c..1dc22cf 100644
--- a/hw/jazz_led.c
+++ b/hw/jazz_led.c
@@ -316,7 +316,8 @@ void jazz_led_init(target_phys_addr_t base)
 
     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 
-    io = cpu_register_io_memory(led_read, led_write, s);
+    io = cpu_register_io_memory(led_read, led_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 1, io);
 
     s->ds = graphic_console_init(jazz_led_update_display,
diff --git a/hw/lan9118.c b/hw/lan9118.c
index b996dc4..a988664 100644
--- a/hw/lan9118.c
+++ b/hw/lan9118.c
@@ -1124,7 +1124,8 @@ static int lan9118_init1(SysBusDevice *dev)
     int i;
 
     s->mmio_index = cpu_register_io_memory(lan9118_readfn,
-                                           lan9118_writefn, s);
+                                           lan9118_writefn, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x100, s->mmio_index);
     sysbus_init_irq(dev, &s->irq);
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
diff --git a/hw/lance.c b/hw/lance.c
index dc12144..8c51858 100644
--- a/hw/lance.c
+++ b/hw/lance.c
@@ -118,7 +118,8 @@ static int lance_init(SysBusDevice *dev)
     PCNetState *s = &d->state;
 
     s->mmio_index =
-        cpu_register_io_memory(lance_mem_read, lance_mem_write, d);
+        cpu_register_io_memory(lance_mem_read, lance_mem_write, d,
+                               DEVICE_NATIVE_ENDIAN);
 
     qdev_init_gpio_in(&dev->qdev, parent_lance_reset, 1);
 
diff --git a/hw/lsi53c895a.c b/hw/lsi53c895a.c
index 1aef62f..0129ae3 100644
--- a/hw/lsi53c895a.c
+++ b/hw/lsi53c895a.c
@@ -2173,9 +2173,11 @@ static int lsi_scsi_init(PCIDevice *dev)
     pci_conf[PCI_INTERRUPT_PIN] = 0x01;
 
     s->mmio_io_addr = cpu_register_io_memory(lsi_mmio_readfn,
-                                             lsi_mmio_writefn, s);
+                                             lsi_mmio_writefn, s,
+                                             DEVICE_NATIVE_ENDIAN);
     s->ram_io_addr = cpu_register_io_memory(lsi_ram_readfn,
-                                            lsi_ram_writefn, s);
+                                            lsi_ram_writefn, s,
+                                            DEVICE_NATIVE_ENDIAN);
 
     pci_register_bar(&s->dev, 0, 256,
                            PCI_BASE_ADDRESS_SPACE_IO, lsi_io_mapfunc);
diff --git a/hw/m48t59.c b/hw/m48t59.c
index c7492a6..3c26b54 100644
--- a/hw/m48t59.c
+++ b/hw/m48t59.c
@@ -716,7 +716,8 @@ static int m48t59_init1(SysBusDevice *dev)
 
     sysbus_init_irq(dev, &s->IRQ);
 
-    mem_index = cpu_register_io_memory(nvram_read, nvram_write, s);
+    mem_index = cpu_register_io_memory(nvram_read, nvram_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, s->size, mem_index);
     m48t59_init_common(s);
 
diff --git a/hw/mac_dbdma.c b/hw/mac_dbdma.c
index 03d2d16..f449a59 100644
--- a/hw/mac_dbdma.c
+++ b/hw/mac_dbdma.c
@@ -844,7 +844,8 @@ void* DBDMA_init (int *dbdma_mem_index)
 
     s = qemu_mallocz(sizeof(DBDMA_channel) * DBDMA_CHANNELS);
 
-    *dbdma_mem_index = cpu_register_io_memory(dbdma_read, dbdma_write, s);
+    *dbdma_mem_index = cpu_register_io_memory(dbdma_read, dbdma_write, s,
+                                              DEVICE_NATIVE_ENDIAN);
     register_savevm(NULL, "dbdma", -1, 1, dbdma_save, dbdma_load, s);
     qemu_register_reset(dbdma_reset, s);
 
diff --git a/hw/mac_nvram.c b/hw/mac_nvram.c
index ce287c3..c2a2fc2 100644
--- a/hw/mac_nvram.c
+++ b/hw/mac_nvram.c
@@ -138,7 +138,8 @@ MacIONVRAMState *macio_nvram_init (int *mem_index, target_phys_addr_t size,
     s->size = size;
     s->it_shift = it_shift;
 
-    s->mem_index = cpu_register_io_memory(nvram_read, nvram_write, s);
+    s->mem_index = cpu_register_io_memory(nvram_read, nvram_write, s,
+                                          DEVICE_NATIVE_ENDIAN);
     *mem_index = s->mem_index;
     register_savevm(NULL, "macio_nvram", -1, 1, macio_nvram_save,
                     macio_nvram_load, s);
diff --git a/hw/marvell_88w8618_audio.c b/hw/marvell_88w8618_audio.c
index 307b584..3eff925 100644
--- a/hw/marvell_88w8618_audio.c
+++ b/hw/marvell_88w8618_audio.c
@@ -249,7 +249,8 @@ static int mv88w8618_audio_init(SysBusDevice *dev)
     wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
 
     iomemtype = cpu_register_io_memory(mv88w8618_audio_readfn,
-                                       mv88w8618_audio_writefn, s);
+                                       mv88w8618_audio_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MP_AUDIO_SIZE, iomemtype);
 
     return 0;
diff --git a/hw/mcf5206.c b/hw/mcf5206.c
index c107de8..2a618d4 100644
--- a/hw/mcf5206.c
+++ b/hw/mcf5206.c
@@ -525,7 +525,8 @@ qemu_irq *mcf5206_init(uint32_t base, CPUState *env)
 
     s = (m5206_mbar_state *)qemu_mallocz(sizeof(m5206_mbar_state));
     iomemtype = cpu_register_io_memory(m5206_mbar_readfn,
-                                       m5206_mbar_writefn, s);
+                                       m5206_mbar_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00001000, iomemtype);
 
     pic = qemu_allocate_irqs(m5206_mbar_set_irq, s, 14);
diff --git a/hw/mcf5208.c b/hw/mcf5208.c
index 38645f7..17a692d 100644
--- a/hw/mcf5208.c
+++ b/hw/mcf5208.c
@@ -179,7 +179,8 @@ static void mcf5208_sys_init(qemu_irq *pic)
     int i;
 
     iomemtype = cpu_register_io_memory(m5208_sys_readfn,
-                                       m5208_sys_writefn, NULL);
+                                       m5208_sys_writefn, NULL,
+                                       DEVICE_NATIVE_ENDIAN);
     /* SDRAMC.  */
     cpu_register_physical_memory(0xfc0a8000, 0x00004000, iomemtype);
     /* Timers.  */
@@ -188,7 +189,8 @@ static void mcf5208_sys_init(qemu_irq *pic)
         bh = qemu_bh_new(m5208_timer_trigger, s);
         s->timer = ptimer_init(bh);
         iomemtype = cpu_register_io_memory(m5208_timer_readfn,
-                                           m5208_timer_writefn, s);
+                                           m5208_timer_writefn, s,
+                                           DEVICE_NATIVE_ENDIAN);
         cpu_register_physical_memory(0xfc080000 + 0x4000 * i, 0x00004000,
                                      iomemtype);
         s->irq = pic[4 + i];
diff --git a/hw/mcf_fec.c b/hw/mcf_fec.c
index 4e7fbed..21035da 100644
--- a/hw/mcf_fec.c
+++ b/hw/mcf_fec.c
@@ -467,7 +467,8 @@ void mcf_fec_init(NICInfo *nd, target_phys_addr_t base, qemu_irq *irq)
     s = (mcf_fec_state *)qemu_mallocz(sizeof(mcf_fec_state));
     s->irq = irq;
     s->mmio_index = cpu_register_io_memory(mcf_fec_readfn,
-                                           mcf_fec_writefn, s);
+                                           mcf_fec_writefn, s,
+                                           DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x400, s->mmio_index);
 
     memcpy(s->conf.macaddr.a, nd->macaddr, sizeof(nd->macaddr));
diff --git a/hw/mcf_intc.c b/hw/mcf_intc.c
index f01bd32..ac04295 100644
--- a/hw/mcf_intc.c
+++ b/hw/mcf_intc.c
@@ -149,7 +149,8 @@ qemu_irq *mcf_intc_init(target_phys_addr_t base, CPUState *env)
     mcf_intc_reset(s);
 
     iomemtype = cpu_register_io_memory(mcf_intc_readfn,
-                                       mcf_intc_writefn, s);
+                                       mcf_intc_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x100, iomemtype);
 
     return qemu_allocate_irqs(mcf_intc_set_irq, s, 64);
diff --git a/hw/mcf_uart.c b/hw/mcf_uart.c
index d16bac7..db57096 100644
--- a/hw/mcf_uart.c
+++ b/hw/mcf_uart.c
@@ -304,6 +304,7 @@ void mcf_uart_mm_init(target_phys_addr_t base, qemu_irq irq,
 
     s = mcf_uart_init(irq, chr);
     iomemtype = cpu_register_io_memory(mcf_uart_readfn,
-                                       mcf_uart_writefn, s);
+                                       mcf_uart_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x40, iomemtype);
 }
diff --git a/hw/mips_jazz.c b/hw/mips_jazz.c
index 66397c0..1264743 100644
--- a/hw/mips_jazz.c
+++ b/hw/mips_jazz.c
@@ -191,7 +191,8 @@ void mips_jazz_init (ram_addr_t ram_size,
 
     /* Chipset */
     rc4030_opaque = rc4030_init(env->irq[6], env->irq[3], &rc4030, &dmas);
-    s_dma_dummy = cpu_register_io_memory(dma_dummy_read, dma_dummy_write, NULL);
+    s_dma_dummy = cpu_register_io_memory(dma_dummy_read, dma_dummy_write, NULL,
+                                         DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0x8000d000, 0x00001000, s_dma_dummy);
 
     /* ISA devices */
@@ -259,7 +260,8 @@ void mips_jazz_init (ram_addr_t ram_size,
 
     /* Real time clock */
     rtc_init(1980, NULL);
-    s_rtc = cpu_register_io_memory(rtc_read, rtc_write, NULL);
+    s_rtc = cpu_register_io_memory(rtc_read, rtc_write, NULL,
+                                   DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0x80004000, 0x00001000, s_rtc);
 
     /* Keyboard (i8042) */
diff --git a/hw/mips_malta.c b/hw/mips_malta.c
index 6be8aa7..5ef3fcb 100644
--- a/hw/mips_malta.c
+++ b/hw/mips_malta.c
@@ -436,7 +436,8 @@ static MaltaFPGAState *malta_fpga_init(target_phys_addr_t base, qemu_irq uart_ir
     s = (MaltaFPGAState *)qemu_mallocz(sizeof(MaltaFPGAState));
 
     malta = cpu_register_io_memory(malta_fpga_read,
-                                   malta_fpga_write, s);
+                                   malta_fpga_write, s,
+                                   DEVICE_NATIVE_ENDIAN);
 
     cpu_register_physical_memory(base, 0x900, malta);
     /* 0xa00 is less than a page, so will still get the right offsets.  */
diff --git a/hw/mips_r4k.c b/hw/mips_r4k.c
index aa34890..afe52f3 100644
--- a/hw/mips_r4k.c
+++ b/hw/mips_r4k.c
@@ -204,7 +204,8 @@ void mips_r4k_init (ram_addr_t ram_size,
 
     if (!mips_qemu_iomemtype) {
         mips_qemu_iomemtype = cpu_register_io_memory(mips_qemu_read,
-                                                     mips_qemu_write, NULL);
+                                                     mips_qemu_write, NULL,
+                                                     DEVICE_NATIVE_ENDIAN);
     }
     cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);
 
diff --git a/hw/mpcore.c b/hw/mpcore.c
index b4db191..fc05215 100644
--- a/hw/mpcore.c
+++ b/hw/mpcore.c
@@ -276,7 +276,8 @@ static int mpcore_priv_init(SysBusDevice *dev)
 
     gic_init(&s->gic, s->num_cpu);
     s->iomemtype = cpu_register_io_memory(mpcore_priv_readfn,
-                                          mpcore_priv_writefn, s);
+                                          mpcore_priv_writefn, s,
+                                          DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio_cb(dev, 0x2000, mpcore_priv_map);
     for (i = 0; i < s->num_cpu * 2; i++) {
         mpcore_timer_init(s, &s->timer[i], i);
diff --git a/hw/msix.c b/hw/msix.c
index f66d255..e123082 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -254,7 +254,8 @@ int msix_init(struct PCIDevice *dev, unsigned short nentries,
     msix_mask_all(dev, nentries);
 
     dev->msix_mmio_index = cpu_register_io_memory(msix_mmio_read,
-                                                  msix_mmio_write, dev);
+                                                  msix_mmio_write, dev,
+                                                  DEVICE_NATIVE_ENDIAN);
     if (dev->msix_mmio_index == -1) {
         ret = -EBUSY;
         goto err_index;
diff --git a/hw/mst_fpga.c b/hw/mst_fpga.c
index 8fc348f..5252fc5 100644
--- a/hw/mst_fpga.c
+++ b/hw/mst_fpga.c
@@ -232,7 +232,7 @@ qemu_irq *mst_irq_init(PXA2xxState *cpu, uint32_t base, int irq)
 	s->pins = qi;
 
 	iomemtype = cpu_register_io_memory(mst_fpga_readfn,
-		mst_fpga_writefn, s);
+		mst_fpga_writefn, s, DEVICE_NATIVE_ENDIAN);
 	cpu_register_physical_memory(base, 0x00100000, iomemtype);
 	register_savevm(NULL, "mainstone_fpga", 0, 0, mst_fpga_save,
                         mst_fpga_load, s);
diff --git a/hw/musicpal.c b/hw/musicpal.c
index 56f2766..d98aa8d 100644
--- a/hw/musicpal.c
+++ b/hw/musicpal.c
@@ -388,7 +388,8 @@ static int mv88w8618_eth_init(SysBusDevice *dev)
     s->nic = qemu_new_nic(&net_mv88w8618_info, &s->conf,
                           dev->qdev.info->name, dev->qdev.id, s);
     s->mmio_index = cpu_register_io_memory(mv88w8618_eth_readfn,
-                                           mv88w8618_eth_writefn, s);
+                                           mv88w8618_eth_writefn, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MP_ETH_SIZE, s->mmio_index);
     return 0;
 }
@@ -600,7 +601,8 @@ static int musicpal_lcd_init(SysBusDevice *dev)
     s->brightness = 7;
 
     iomemtype = cpu_register_io_memory(musicpal_lcd_readfn,
-                                       musicpal_lcd_writefn, s);
+                                       musicpal_lcd_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MP_LCD_SIZE, iomemtype);
 
     s->ds = graphic_console_init(lcd_refresh, lcd_invalidate,
@@ -725,7 +727,8 @@ static int mv88w8618_pic_init(SysBusDevice *dev)
     qdev_init_gpio_in(&dev->qdev, mv88w8618_pic_set_irq, 32);
     sysbus_init_irq(dev, &s->parent_irq);
     iomemtype = cpu_register_io_memory(mv88w8618_pic_readfn,
-                                       mv88w8618_pic_writefn, s);
+                                       mv88w8618_pic_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MP_PIC_SIZE, iomemtype);
     return 0;
 }
@@ -886,7 +889,8 @@ static int mv88w8618_pit_init(SysBusDevice *dev)
     }
 
     iomemtype = cpu_register_io_memory(mv88w8618_pit_readfn,
-                                       mv88w8618_pit_writefn, s);
+                                       mv88w8618_pit_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MP_PIT_SIZE, iomemtype);
     return 0;
 }
@@ -976,7 +980,8 @@ static int mv88w8618_flashcfg_init(SysBusDevice *dev)
 
     s->cfgr0 = 0xfffe4285; /* Default as set by U-Boot for 8 MB flash */
     iomemtype = cpu_register_io_memory(mv88w8618_flashcfg_readfn,
-                                       mv88w8618_flashcfg_writefn, s);
+                                       mv88w8618_flashcfg_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MP_FLASHCFG_SIZE, iomemtype);
     return 0;
 }
@@ -1037,7 +1042,8 @@ static void musicpal_misc_init(void)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(musicpal_misc_readfn,
-                                       musicpal_misc_writefn, NULL);
+                                       musicpal_misc_writefn, NULL,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(MP_MISC_BASE, MP_MISC_SIZE, iomemtype);
 }
 
@@ -1082,7 +1088,8 @@ static int mv88w8618_wlan_init(SysBusDevice *dev)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(mv88w8618_wlan_readfn,
-                                       mv88w8618_wlan_writefn, NULL);
+                                       mv88w8618_wlan_writefn, NULL,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MP_WLAN_SIZE, iomemtype);
     return 0;
 }
@@ -1293,7 +1300,8 @@ static int musicpal_gpio_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->irq);
 
     iomemtype = cpu_register_io_memory(musicpal_gpio_readfn,
-                                       musicpal_gpio_writefn, s);
+                                       musicpal_gpio_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MP_GPIO_SIZE, iomemtype);
 
     qdev_init_gpio_out(&dev->qdev, s->out, ARRAY_SIZE(s->out));
diff --git a/hw/omap.h b/hw/omap.h
index fe32ca5..c227a82 100644
--- a/hw/omap.h
+++ b/hw/omap.h
@@ -1129,7 +1129,8 @@ inline static int debug_register_io_memory(CPUReadMemoryFunc * const *mem_read,
     s->mem_write = mem_write;
     s->opaque = opaque;
     s->in = 0;
-    return cpu_register_io_memory(io_readfn, io_writefn, s);
+    return cpu_register_io_memory(io_readfn, io_writefn, s,
+                                  DEVICE_NATIVE_ENDIAN);
 }
 #  define cpu_register_io_memory	debug_register_io_memory
 # endif
diff --git a/hw/omap1.c b/hw/omap1.c
index f4966f7..d5e4dab 100644
--- a/hw/omap1.c
+++ b/hw/omap1.c
@@ -264,7 +264,7 @@ static struct omap_mpu_timer_s *omap_mpu_timer_init(target_phys_addr_t base,
     omap_timer_clk_setup(s);
 
     iomemtype = cpu_register_io_memory(omap_mpu_timer_readfn,
-                    omap_mpu_timer_writefn, s);
+                    omap_mpu_timer_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x100, iomemtype);
 
     return s;
@@ -387,7 +387,7 @@ static struct omap_watchdog_timer_s *omap_wd_timer_init(target_phys_addr_t base,
     omap_timer_clk_setup(&s->timer);
 
     iomemtype = cpu_register_io_memory(omap_wd_timer_readfn,
-                    omap_wd_timer_writefn, s);
+                    omap_wd_timer_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x100, iomemtype);
 
     return s;
@@ -489,7 +489,7 @@ static struct omap_32khz_timer_s *omap_os_timer_init(target_phys_addr_t base,
     omap_timer_clk_setup(&s->timer);
 
     iomemtype = cpu_register_io_memory(omap_os_timer_readfn,
-                    omap_os_timer_writefn, s);
+                    omap_os_timer_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     return s;
@@ -716,7 +716,7 @@ static void omap_ulpd_pm_init(target_phys_addr_t base,
                 struct omap_mpu_state_s *mpu)
 {
     int iomemtype = cpu_register_io_memory(omap_ulpd_pm_readfn,
-                    omap_ulpd_pm_writefn, mpu);
+                    omap_ulpd_pm_writefn, mpu, DEVICE_NATIVE_ENDIAN);
 
     cpu_register_physical_memory(base, 0x800, iomemtype);
     omap_ulpd_pm_reset(mpu);
@@ -931,7 +931,7 @@ static void omap_pin_cfg_init(target_phys_addr_t base,
                 struct omap_mpu_state_s *mpu)
 {
     int iomemtype = cpu_register_io_memory(omap_pin_cfg_readfn,
-                    omap_pin_cfg_writefn, mpu);
+                    omap_pin_cfg_writefn, mpu, DEVICE_NATIVE_ENDIAN);
 
     cpu_register_physical_memory(base, 0x800, iomemtype);
     omap_pin_cfg_reset(mpu);
@@ -1001,7 +1001,7 @@ static CPUWriteMemoryFunc * const omap_id_writefn[] = {
 static void omap_id_init(struct omap_mpu_state_s *mpu)
 {
     int iomemtype = cpu_register_io_memory(omap_id_readfn,
-                    omap_id_writefn, mpu);
+                    omap_id_writefn, mpu, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory_offset(0xfffe1800, 0x800, iomemtype, 0xfffe1800);
     cpu_register_physical_memory_offset(0xfffed400, 0x100, iomemtype, 0xfffed400);
     if (!cpu_is_omap15xx(mpu))
@@ -1084,7 +1084,7 @@ static void omap_mpui_init(target_phys_addr_t base,
                 struct omap_mpu_state_s *mpu)
 {
     int iomemtype = cpu_register_io_memory(omap_mpui_readfn,
-                    omap_mpui_writefn, mpu);
+                    omap_mpui_writefn, mpu, DEVICE_NATIVE_ENDIAN);
 
     cpu_register_physical_memory(base, 0x100, iomemtype);
 
@@ -1193,7 +1193,7 @@ static struct omap_tipb_bridge_s *omap_tipb_bridge_init(target_phys_addr_t base,
     omap_tipb_bridge_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_tipb_bridge_readfn,
-                    omap_tipb_bridge_writefn, s);
+                    omap_tipb_bridge_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x100, iomemtype);
 
     return s;
@@ -1299,7 +1299,7 @@ static void omap_tcmi_init(target_phys_addr_t base,
                 struct omap_mpu_state_s *mpu)
 {
     int iomemtype = cpu_register_io_memory(omap_tcmi_readfn,
-                    omap_tcmi_writefn, mpu);
+                    omap_tcmi_writefn, mpu, DEVICE_NATIVE_ENDIAN);
 
     cpu_register_physical_memory(base, 0x100, iomemtype);
     omap_tcmi_reset(mpu);
@@ -1372,7 +1372,7 @@ static void omap_dpll_init(struct dpll_ctl_s *s, target_phys_addr_t base,
                 omap_clk clk)
 {
     int iomemtype = cpu_register_io_memory(omap_dpll_readfn,
-                    omap_dpll_writefn, s);
+                    omap_dpll_writefn, s, DEVICE_NATIVE_ENDIAN);
 
     s->dpll = clk;
     omap_dpll_reset(s);
@@ -1776,8 +1776,10 @@ static void omap_clkm_init(target_phys_addr_t mpu_base,
                 target_phys_addr_t dsp_base, struct omap_mpu_state_s *s)
 {
     int iomemtype[2] = {
-        cpu_register_io_memory(omap_clkm_readfn, omap_clkm_writefn, s),
-        cpu_register_io_memory(omap_clkdsp_readfn, omap_clkdsp_writefn, s),
+        cpu_register_io_memory(omap_clkm_readfn, omap_clkm_writefn, s,
+                               DEVICE_NATIVE_ENDIAN),
+        cpu_register_io_memory(omap_clkdsp_readfn, omap_clkdsp_writefn, s,
+                               DEVICE_NATIVE_ENDIAN),
     };
 
     s->clkm.arm_idlect1 = 0x03ff;
@@ -2031,7 +2033,7 @@ struct omap_mpuio_s *omap_mpuio_init(target_phys_addr_t base,
     omap_mpuio_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_mpuio_readfn,
-                    omap_mpuio_writefn, s);
+                    omap_mpuio_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     omap_clk_adduser(clk, qemu_allocate_irqs(omap_mpuio_onoff, s, 1)[0]);
@@ -2216,7 +2218,7 @@ struct omap_uwire_s *omap_uwire_init(target_phys_addr_t base,
     omap_uwire_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_uwire_readfn,
-                    omap_uwire_writefn, s);
+                    omap_uwire_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     return s;
@@ -2317,7 +2319,7 @@ static void omap_pwl_init(target_phys_addr_t base, struct omap_mpu_state_s *s,
     omap_pwl_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_pwl_readfn,
-                    omap_pwl_writefn, s);
+                    omap_pwl_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     omap_clk_adduser(clk, qemu_allocate_irqs(omap_pwl_clk_update, s, 1)[0]);
@@ -2412,7 +2414,7 @@ static void omap_pwt_init(target_phys_addr_t base, struct omap_mpu_state_s *s,
     omap_pwt_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_pwt_readfn,
-                    omap_pwt_writefn, s);
+                    omap_pwt_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 }
 
@@ -2825,7 +2827,7 @@ static struct omap_rtc_s *omap_rtc_init(target_phys_addr_t base,
     omap_rtc_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_rtc_readfn,
-                    omap_rtc_writefn, s);
+                    omap_rtc_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     return s;
@@ -3347,7 +3349,7 @@ struct omap_mcbsp_s *omap_mcbsp_init(target_phys_addr_t base,
     omap_mcbsp_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_mcbsp_readfn,
-                    omap_mcbsp_writefn, s);
+                    omap_mcbsp_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     return s;
@@ -3519,7 +3521,7 @@ static struct omap_lpg_s *omap_lpg_init(target_phys_addr_t base, omap_clk clk)
     omap_lpg_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_lpg_readfn,
-                    omap_lpg_writefn, s);
+                    omap_lpg_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     omap_clk_adduser(clk, qemu_allocate_irqs(omap_lpg_clk_update, s, 1)[0]);
@@ -3552,7 +3554,7 @@ static CPUWriteMemoryFunc * const omap_mpui_io_writefn[] = {
 static void omap_setup_mpui_io(struct omap_mpu_state_s *mpu)
 {
     int iomemtype = cpu_register_io_memory(omap_mpui_io_readfn,
-                    omap_mpui_io_writefn, mpu);
+                    omap_mpui_io_writefn, mpu, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(OMAP_MPUI_BASE, 0x7fff, iomemtype);
 }
 
diff --git a/hw/omap2.c b/hw/omap2.c
index e35a56e..0f13272 100644
--- a/hw/omap2.c
+++ b/hw/omap2.c
@@ -600,7 +600,7 @@ static struct omap_eac_s *omap_eac_init(struct omap_target_agent_s *ta,
     AUD_register_card("OMAP EAC", &s->codec.card);
 
     iomemtype = cpu_register_io_memory(omap_eac_readfn,
-                    omap_eac_writefn, s);
+                    omap_eac_writefn, s, DEVICE_NATIVE_ENDIAN);
     omap_l4_attach(ta, 0, iomemtype);
 
     return s;
@@ -788,7 +788,7 @@ static struct omap_sti_s *omap_sti_init(struct omap_target_agent_s *ta,
     omap_l4_attach(ta, 0, iomemtype);
 
     iomemtype = cpu_register_io_memory(omap_sti_fifo_readfn,
-                    omap_sti_fifo_writefn, s);
+                    omap_sti_fifo_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(channel_base, 0x10000, iomemtype);
 
     return s;
diff --git a/hw/omap_dma.c b/hw/omap_dma.c
index 3e718ba..8e2dcc9 100644
--- a/hw/omap_dma.c
+++ b/hw/omap_dma.c
@@ -1659,7 +1659,7 @@ struct soc_dma_s *omap_dma_init(target_phys_addr_t base, qemu_irq *irqs,
     omap_dma_clk_update(s, 0, 1);
 
     iomemtype = cpu_register_io_memory(omap_dma_readfn,
-                    omap_dma_writefn, s);
+                    omap_dma_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, memsize, iomemtype);
 
     mpu->drq = s->dma->drq;
@@ -2066,7 +2066,7 @@ struct soc_dma_s *omap_dma4_init(target_phys_addr_t base, qemu_irq *irqs,
     omap_dma_clk_update(s, 0, !!s->dma->freq);
 
     iomemtype = cpu_register_io_memory(omap_dma4_readfn,
-                    omap_dma4_writefn, s);
+                    omap_dma4_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x1000, iomemtype);
 
     mpu->drq = s->dma->drq;
diff --git a/hw/omap_dss.c b/hw/omap_dss.c
index 044f2d2..afe287a 100644
--- a/hw/omap_dss.c
+++ b/hw/omap_dss.c
@@ -1045,7 +1045,7 @@ struct omap_dss_s *omap_dss_init(struct omap_target_agent_s *ta,
     iomemtype[3] = l4_register_io_memory(omap_venc1_readfn,
                     omap_venc1_writefn, s);
     iomemtype[4] = cpu_register_io_memory(omap_im3_readfn,
-                    omap_im3_writefn, s);
+                    omap_im3_writefn, s, DEVICE_NATIVE_ENDIAN);
     omap_l4_attach(ta, 0, iomemtype[0]);
     omap_l4_attach(ta, 1, iomemtype[1]);
     omap_l4_attach(ta, 2, iomemtype[2]);
diff --git a/hw/omap_gpio.c b/hw/omap_gpio.c
index d978c7a..478f7d9 100644
--- a/hw/omap_gpio.c
+++ b/hw/omap_gpio.c
@@ -183,7 +183,7 @@ struct omap_gpio_s *omap_gpio_init(target_phys_addr_t base,
     omap_gpio_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_gpio_readfn,
-                    omap_gpio_writefn, s);
+                    omap_gpio_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x1000, iomemtype);
 
     return s;
diff --git a/hw/omap_gpmc.c b/hw/omap_gpmc.c
index 72cfecc..8bf3343 100644
--- a/hw/omap_gpmc.c
+++ b/hw/omap_gpmc.c
@@ -390,7 +390,7 @@ struct omap_gpmc_s *omap_gpmc_init(target_phys_addr_t base, qemu_irq irq)
     omap_gpmc_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_gpmc_readfn,
-                    omap_gpmc_writefn, s);
+                    omap_gpmc_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x1000, iomemtype);
 
     return s;
diff --git a/hw/omap_i2c.c b/hw/omap_i2c.c
index d133977..5cabb5a 100644
--- a/hw/omap_i2c.c
+++ b/hw/omap_i2c.c
@@ -437,7 +437,7 @@ struct omap_i2c_s *omap_i2c_init(target_phys_addr_t base,
     omap_i2c_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_i2c_readfn,
-                    omap_i2c_writefn, s);
+                    omap_i2c_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     return s;
diff --git a/hw/omap_intc.c b/hw/omap_intc.c
index 59893b7..001e20b 100644
--- a/hw/omap_intc.c
+++ b/hw/omap_intc.c
@@ -371,7 +371,7 @@ struct omap_intr_handler_s *omap_inth_init(target_phys_addr_t base,
     omap_inth_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_inth_readfn,
-                    omap_inth_writefn, s);
+                    omap_inth_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, size, iomemtype);
 
     return s;
@@ -591,7 +591,7 @@ struct omap_intr_handler_s *omap2_inth_init(target_phys_addr_t base,
     omap_inth_reset(s);
 
     iomemtype = cpu_register_io_memory(omap2_inth_readfn,
-                    omap2_inth_writefn, s);
+                    omap2_inth_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, size, iomemtype);
 
     return s;
diff --git a/hw/omap_l4.c b/hw/omap_l4.c
index bf8ba36..4af0ca8 100644
--- a/hw/omap_l4.c
+++ b/hw/omap_l4.c
@@ -107,7 +107,8 @@ int l4_register_io_memory(CPUReadMemoryFunc * const *mem_read,
                           CPUWriteMemoryFunc * const *mem_write,
                           void *opaque)
 {
-    return cpu_register_io_memory(mem_read, mem_write, opaque);
+    return cpu_register_io_memory(mem_read, mem_write, opaque,
+                                  DEVICE_NATIVE_ENDIAN);
 }
 #endif
 
@@ -131,7 +132,7 @@ struct omap_l4_s *omap_l4_init(target_phys_addr_t base, int ta_num)
 
     omap_cpu_io_entry =
             cpu_register_io_memory(omap_l4_io_readfn,
-                            omap_l4_io_writefn, bus);
+                            omap_l4_io_writefn, bus, DEVICE_NATIVE_ENDIAN);
 # define L4_PAGES	(0xb4000 / TARGET_PAGE_SIZE)
     omap_l4_io_readb_fn = qemu_mallocz(sizeof(void *) * L4_PAGES);
     omap_l4_io_readh_fn = qemu_mallocz(sizeof(void *) * L4_PAGES);
diff --git a/hw/omap_lcdc.c b/hw/omap_lcdc.c
index 6affef6..0c2c550 100644
--- a/hw/omap_lcdc.c
+++ b/hw/omap_lcdc.c
@@ -450,7 +450,7 @@ struct omap_lcd_panel_s *omap_lcdc_init(target_phys_addr_t base, qemu_irq irq,
     omap_lcdc_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_lcdc_readfn,
-                    omap_lcdc_writefn, s);
+                    omap_lcdc_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x100, iomemtype);
 
     s->state = graphic_console_init(omap_update_display,
diff --git a/hw/omap_mmc.c b/hw/omap_mmc.c
index 9d167ff..e9ec2f3 100644
--- a/hw/omap_mmc.c
+++ b/hw/omap_mmc.c
@@ -587,7 +587,7 @@ struct omap_mmc_s *omap_mmc_init(target_phys_addr_t base,
     omap_mmc_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_mmc_readfn,
-                    omap_mmc_writefn, s);
+                    omap_mmc_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x800, iomemtype);
 
     /* Instantiate the storage */
diff --git a/hw/omap_sdrc.c b/hw/omap_sdrc.c
index aefaebe..e183762 100644
--- a/hw/omap_sdrc.c
+++ b/hw/omap_sdrc.c
@@ -158,7 +158,7 @@ struct omap_sdrc_s *omap_sdrc_init(target_phys_addr_t base)
     omap_sdrc_reset(s);
 
     iomemtype = cpu_register_io_memory(omap_sdrc_readfn,
-                    omap_sdrc_writefn, s);
+                    omap_sdrc_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x1000, iomemtype);
 
     return s;
diff --git a/hw/omap_sx1.c b/hw/omap_sx1.c
index 44dc514..06bccbd 100644
--- a/hw/omap_sx1.c
+++ b/hw/omap_sx1.c
@@ -143,12 +143,15 @@ static void sx1_init(ram_addr_t ram_size,
                                  qemu_ram_alloc(NULL, "omap_sx1.flash0-0",
                                                 flash_size) | IO_MEM_ROM);
 
-    io = cpu_register_io_memory(static_readfn, static_writefn, &cs0val);
+    io = cpu_register_io_memory(static_readfn, static_writefn, &cs0val,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(OMAP_CS0_BASE + flash_size,
                     OMAP_CS0_SIZE - flash_size, io);
-    io = cpu_register_io_memory(static_readfn, static_writefn, &cs2val);
+    io = cpu_register_io_memory(static_readfn, static_writefn, &cs2val,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(OMAP_CS2_BASE, OMAP_CS2_SIZE, io);
-    io = cpu_register_io_memory(static_readfn, static_writefn, &cs3val);
+    io = cpu_register_io_memory(static_readfn, static_writefn, &cs3val,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(OMAP_CS3_BASE, OMAP_CS3_SIZE, io);
 
     fl_idx = 0;
@@ -175,7 +178,8 @@ static void sx1_init(ram_addr_t ram_size,
         cpu_register_physical_memory(OMAP_CS1_BASE, flash1_size,
                                      qemu_ram_alloc(NULL, "omap_sx1.flash1-0",
                                                     flash1_size) | IO_MEM_ROM);
-        io = cpu_register_io_memory(static_readfn, static_writefn, &cs1val);
+        io = cpu_register_io_memory(static_readfn, static_writefn, &cs1val,
+                                    DEVICE_NATIVE_ENDIAN);
         cpu_register_physical_memory(OMAP_CS1_BASE + flash1_size,
                         OMAP_CS1_SIZE - flash1_size, io);
 
@@ -189,7 +193,8 @@ static void sx1_init(ram_addr_t ram_size,
         }
         fl_idx++;
     } else {
-        io = cpu_register_io_memory(static_readfn, static_writefn, &cs1val);
+        io = cpu_register_io_memory(static_readfn, static_writefn, &cs1val,
+                                    DEVICE_NATIVE_ENDIAN);
         cpu_register_physical_memory(OMAP_CS1_BASE, OMAP_CS1_SIZE, io);
     }
 
diff --git a/hw/omap_uart.c b/hw/omap_uart.c
index cc66cd9..9cee81d 100644
--- a/hw/omap_uart.c
+++ b/hw/omap_uart.c
@@ -170,7 +170,7 @@ struct omap_uart_s *omap2_uart_init(struct omap_target_agent_s *ta,
     struct omap_uart_s *s = omap_uart_init(base, irq,
                     fclk, iclk, txdma, rxdma, label, chr);
     int iomemtype = cpu_register_io_memory(omap_uart_readfn,
-                    omap_uart_writefn, s);
+                    omap_uart_writefn, s, DEVICE_NATIVE_ENDIAN);
 
     s->ta = ta;
 
diff --git a/hw/onenand.c b/hw/onenand.c
index f7afeca..d9cdcf2 100644
--- a/hw/onenand.c
+++ b/hw/onenand.c
@@ -630,7 +630,7 @@ void *onenand_init(uint32_t id, int regshift, qemu_irq irq)
     s->blockwp = qemu_malloc(s->blocks);
     s->density_mask = (id & (1 << 11)) ? (1 << (6 + ((id >> 12) & 7))) : 0;
     s->iomemtype = cpu_register_io_memory(onenand_readfn,
-                    onenand_writefn, s);
+                    onenand_writefn, s, DEVICE_NATIVE_ENDIAN);
     if (!dinfo)
         s->image = memset(qemu_malloc(size + (size >> 5)),
                         0xff, size + (size >> 5));
diff --git a/hw/openpic.c b/hw/openpic.c
index f6b8f21..9e2500a 100644
--- a/hw/openpic.c
+++ b/hw/openpic.c
@@ -1035,7 +1035,8 @@ static void openpic_map(PCIDevice *pci_dev, int region_num,
     cpu_register_physical_memory(addr, 0x40000, opp->mem_index);
 #if 0 // Don't implement ISU for now
     opp_io_memory = cpu_register_io_memory(openpic_src_read,
-                                           openpic_src_write);
+                                           openpic_src_write, NULL
+                                           DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(isu_base, 0x20 * (EXT_IRQ + 2),
                                  opp_io_memory);
 #endif
@@ -1202,8 +1203,8 @@ qemu_irq *openpic_init (PCIBus *bus, int *pmem_index, int nb_cpus,
     } else {
         opp = qemu_mallocz(sizeof(openpic_t));
     }
-    opp->mem_index = cpu_register_io_memory(openpic_read,
-                                            openpic_write, opp);
+    opp->mem_index = cpu_register_io_memory(openpic_read, openpic_write, opp,
+                                            DEVICE_NATIVE_ENDIAN);
 
     //    isu_base &= 0xFFFC0000;
     opp->nb_cpus = nb_cpus;
@@ -1671,7 +1672,8 @@ qemu_irq *mpic_init (target_phys_addr_t base, int nb_cpus,
     for (i = 0; i < sizeof(list)/sizeof(list[0]); i++) {
         int mem_index;
 
-        mem_index = cpu_register_io_memory(list[i].read, list[i].write, mpp);
+        mem_index = cpu_register_io_memory(list[i].read, list[i].write, mpp,
+                                           DEVICE_NATIVE_ENDIAN);
         if (mem_index < 0) {
             goto free;
         }
diff --git a/hw/palm.c b/hw/palm.c
index 193aa11..dd8d1e5 100644
--- a/hw/palm.c
+++ b/hw/palm.c
@@ -216,14 +216,18 @@ static void palmte_init(ram_addr_t ram_size,
                                  qemu_ram_alloc(NULL, "palmte.flash",
                                                 flash_size) | IO_MEM_ROM);
 
-    io = cpu_register_io_memory(static_readfn, static_writefn, &cs0val);
+    io = cpu_register_io_memory(static_readfn, static_writefn, &cs0val,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(OMAP_CS0_BASE + flash_size,
                     OMAP_CS0_SIZE - flash_size, io);
-    io = cpu_register_io_memory(static_readfn, static_writefn, &cs1val);
+    io = cpu_register_io_memory(static_readfn, static_writefn, &cs1val,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(OMAP_CS1_BASE, OMAP_CS1_SIZE, io);
-    io = cpu_register_io_memory(static_readfn, static_writefn, &cs2val);
+    io = cpu_register_io_memory(static_readfn, static_writefn, &cs2val,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(OMAP_CS2_BASE, OMAP_CS2_SIZE, io);
-    io = cpu_register_io_memory(static_readfn, static_writefn, &cs3val);
+    io = cpu_register_io_memory(static_readfn, static_writefn, &cs3val,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(OMAP_CS3_BASE, OMAP_CS3_SIZE, io);
 
     palmte_microwire_setup(cpu);
diff --git a/hw/parallel.c b/hw/parallel.c
index 6b11672..00005c4 100644
--- a/hw/parallel.c
+++ b/hw/parallel.c
@@ -577,7 +577,8 @@ ParallelState *parallel_mm_init(target_phys_addr_t base, int it_shift, qemu_irq
     s->it_shift = it_shift;
     qemu_register_reset(parallel_reset, s);
 
-    io_sw = cpu_register_io_memory(parallel_mm_read_sw, parallel_mm_write_sw, s);
+    io_sw = cpu_register_io_memory(parallel_mm_read_sw, parallel_mm_write_sw,
+                                   s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 8 << it_shift, io_sw);
     return s;
 }
diff --git a/hw/pcie_host.c b/hw/pcie_host.c
index c4feeca..21069ee 100644
--- a/hw/pcie_host.c
+++ b/hw/pcie_host.c
@@ -137,7 +137,8 @@ int pcie_host_init(PCIExpressHost *e)
 {
     e->base_addr = PCIE_BASE_ADDR_UNMAPPED;
     e->mmio_index =
-        cpu_register_io_memory(pcie_mmcfg_read, pcie_mmcfg_write, e);
+        cpu_register_io_memory(pcie_mmcfg_read, pcie_mmcfg_write, e,
+                               DEVICE_NATIVE_ENDIAN);
     if (e->mmio_index < 0) {
         return -1;
     }
diff --git a/hw/pckbd.c b/hw/pckbd.c
index 6e4e406..7f0e6bb 100644
--- a/hw/pckbd.c
+++ b/hw/pckbd.c
@@ -436,7 +436,8 @@ void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq,
     s->mask = mask;
 
     vmstate_register(NULL, 0, &vmstate_kbd, s);
-    s_io_memory = cpu_register_io_memory(kbd_mm_read, kbd_mm_write, s);
+    s_io_memory = cpu_register_io_memory(kbd_mm_read, kbd_mm_write, s,
+                                         DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, size, s_io_memory);
 
     s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
diff --git a/hw/pcnet-pci.c b/hw/pcnet-pci.c
index 3dfbe46..5c5bd21 100644
--- a/hw/pcnet-pci.c
+++ b/hw/pcnet-pci.c
@@ -294,7 +294,8 @@ static int pci_pcnet_init(PCIDevice *pci_dev)
 
     /* Handler for memory-mapped I/O */
     s->mmio_index =
-      cpu_register_io_memory(pcnet_mmio_read, pcnet_mmio_write, &d->state);
+      cpu_register_io_memory(pcnet_mmio_read, pcnet_mmio_write, &d->state,
+                             DEVICE_NATIVE_ENDIAN);
 
     pci_register_bar(pci_dev, 0, PCNET_IOPORT_SIZE,
                            PCI_BASE_ADDRESS_SPACE_IO, pcnet_ioport_map);
diff --git a/hw/pflash_cfi01.c b/hw/pflash_cfi01.c
index 19e13d6..fb20dfb 100644
--- a/hw/pflash_cfi01.c
+++ b/hw/pflash_cfi01.c
@@ -600,10 +600,12 @@ pflash_t *pflash_cfi01_register(target_phys_addr_t base, ram_addr_t off,
     pfl->storage = qemu_get_ram_ptr(off);
     if (be) {
         pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_be,
-                                             pflash_write_ops_be, pfl);
+                                             pflash_write_ops_be, pfl,
+                                             DEVICE_NATIVE_ENDIAN);
     } else {
         pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_le,
-                                             pflash_write_ops_le, pfl);
+                                             pflash_write_ops_le, pfl,
+                                             DEVICE_NATIVE_ENDIAN);
     }
     pfl->off = off;
     cpu_register_physical_memory(base, total_len,
diff --git a/hw/pflash_cfi02.c b/hw/pflash_cfi02.c
index f3d3f41..3594a36 100644
--- a/hw/pflash_cfi02.c
+++ b/hw/pflash_cfi02.c
@@ -619,11 +619,11 @@ pflash_t *pflash_cfi02_register(target_phys_addr_t base, ram_addr_t off,
     if (be) {
         pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_be,
                                              pflash_write_ops_be,
-                                             pfl);
+                                             pfl, DEVICE_NATIVE_ENDIAN);
     } else {
         pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_le,
                                              pflash_write_ops_le,
-                                             pfl);
+                                             pfl, DEVICE_NATIVE_ENDIAN);
     }
     pfl->off = off;
     pfl->base = base;
diff --git a/hw/pl011.c b/hw/pl011.c
index 02cf84a..77f0dbf 100644
--- a/hw/pl011.c
+++ b/hw/pl011.c
@@ -292,7 +292,8 @@ static int pl011_init(SysBusDevice *dev, const unsigned char *id)
     pl011_state *s = FROM_SYSBUS(pl011_state, dev);
 
     iomemtype = cpu_register_io_memory(pl011_readfn,
-                                       pl011_writefn, s);
+                                       pl011_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000,iomemtype);
     sysbus_init_irq(dev, &s->irq);
     s->id = id;
diff --git a/hw/pl022.c b/hw/pl022.c
index d7862bc..ffe05ab 100644
--- a/hw/pl022.c
+++ b/hw/pl022.c
@@ -294,7 +294,8 @@ static int pl022_init(SysBusDevice *dev)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(pl022_readfn,
-                                       pl022_writefn, s);
+                                       pl022_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     sysbus_init_irq(dev, &s->irq);
     s->ssi = ssi_create_bus(&dev->qdev, "ssi");
diff --git a/hw/pl031.c b/hw/pl031.c
index 45b7032..e3700c1 100644
--- a/hw/pl031.c
+++ b/hw/pl031.c
@@ -189,7 +189,8 @@ static int pl031_init(SysBusDevice *dev)
     pl031_state *s = FROM_SYSBUS(pl031_state, dev);
     struct tm tm;
 
-    iomemtype = cpu_register_io_memory(pl031_readfn, pl031_writefn, s);
+    iomemtype = cpu_register_io_memory(pl031_readfn, pl031_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     if (iomemtype == -1) {
         hw_error("pl031_init: Can't register I/O memory\n");
     }
diff --git a/hw/pl050.c b/hw/pl050.c
index a47786c..0573839 100644
--- a/hw/pl050.c
+++ b/hw/pl050.c
@@ -128,7 +128,8 @@ static int pl050_init(SysBusDevice *dev, int is_mouse)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(pl050_readfn,
-                                       pl050_writefn, s);
+                                       pl050_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     sysbus_init_irq(dev, &s->irq);
     s->is_mouse = is_mouse;
diff --git a/hw/pl061.c b/hw/pl061.c
index e4505f5..1997b7c 100644
--- a/hw/pl061.c
+++ b/hw/pl061.c
@@ -297,7 +297,8 @@ static int pl061_init(SysBusDevice *dev)
     pl061_state *s = FROM_SYSBUS(pl061_state, dev);
 
     iomemtype = cpu_register_io_memory(pl061_readfn,
-                                       pl061_writefn, s);
+                                       pl061_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     sysbus_init_irq(dev, &s->irq);
     qdev_init_gpio_in(&dev->qdev, pl061_set_irq, 8);
diff --git a/hw/pl080.c b/hw/pl080.c
index 2df65fa..1a3e06c 100644
--- a/hw/pl080.c
+++ b/hw/pl080.c
@@ -325,7 +325,8 @@ static int pl08x_init(SysBusDevice *dev, int nchannels)
     pl080_state *s = FROM_SYSBUS(pl080_state, dev);
 
     iomemtype = cpu_register_io_memory(pl080_readfn,
-                                       pl080_writefn, s);
+                                       pl080_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     sysbus_init_irq(dev, &s->irq);
     s->nchannels = nchannels;
diff --git a/hw/pl110.c b/hw/pl110.c
index 173458a..a4adb63 100644
--- a/hw/pl110.c
+++ b/hw/pl110.c
@@ -358,7 +358,8 @@ static int pl110_init(SysBusDevice *dev)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(pl110_readfn,
-                                       pl110_writefn, s);
+                                       pl110_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     sysbus_init_irq(dev, &s->irq);
     s->ds = graphic_console_init(pl110_update_display,
diff --git a/hw/pl181.c b/hw/pl181.c
index 85cadc4..3e5f92f 100644
--- a/hw/pl181.c
+++ b/hw/pl181.c
@@ -451,8 +451,8 @@ static int pl181_init(SysBusDevice *dev)
     pl181_state *s = FROM_SYSBUS(pl181_state, dev);
     BlockDriverState *bd;
 
-    iomemtype = cpu_register_io_memory(pl181_readfn,
-                                       pl181_writefn, s);
+    iomemtype = cpu_register_io_memory(pl181_readfn, pl181_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     sysbus_init_irq(dev, &s->irq[0]);
     sysbus_init_irq(dev, &s->irq[1]);
diff --git a/hw/pl190.c b/hw/pl190.c
index a4bc9c1..e04e6c1 100644
--- a/hw/pl190.c
+++ b/hw/pl190.c
@@ -233,7 +233,8 @@ static int pl190_init(SysBusDevice *dev)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(pl190_readfn,
-                                       pl190_writefn, s);
+                                       pl190_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     qdev_init_gpio_in(&dev->qdev, pl190_set_irq, 32);
     sysbus_init_irq(dev, &s->irq);
diff --git a/hw/ppc405_boards.c b/hw/ppc405_boards.c
index c5897a9..9abede7 100644
--- a/hw/ppc405_boards.c
+++ b/hw/ppc405_boards.c
@@ -164,7 +164,8 @@ static void ref405ep_fpga_init (uint32_t base)
 
     fpga = qemu_mallocz(sizeof(ref405ep_fpga_t));
     fpga_memory = cpu_register_io_memory(ref405ep_fpga_read,
-                                         ref405ep_fpga_write, fpga);
+                                         ref405ep_fpga_write, fpga,
+                                         DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00000100, fpga_memory);
     qemu_register_reset(&ref405ep_fpga_reset, fpga);
 }
@@ -488,7 +489,8 @@ static void taihu_cpld_init (uint32_t base)
 
     cpld = qemu_mallocz(sizeof(taihu_cpld_t));
     cpld_memory = cpu_register_io_memory(taihu_cpld_read,
-                                         taihu_cpld_write, cpld);
+                                         taihu_cpld_write, cpld,
+                                         DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00000100, cpld_memory);
     qemu_register_reset(&taihu_cpld_reset, cpld);
 }
diff --git a/hw/ppc405_uc.c b/hw/ppc405_uc.c
index 3600737..8136cb9 100644
--- a/hw/ppc405_uc.c
+++ b/hw/ppc405_uc.c
@@ -383,7 +383,8 @@ static void ppc4xx_opba_init(target_phys_addr_t base)
 #ifdef DEBUG_OPBA
     printf("%s: offset " TARGET_FMT_plx "\n", __func__, base);
 #endif
-    io = cpu_register_io_memory(opba_read, opba_write, opba);
+    io = cpu_register_io_memory(opba_read, opba_write, opba,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x002, io);
     qemu_register_reset(ppc4xx_opba_reset, opba);
 }
@@ -809,7 +810,8 @@ static void ppc405_gpio_init(target_phys_addr_t base)
 #ifdef DEBUG_GPIO
     printf("%s: offset " TARGET_FMT_plx "\n", __func__, base);
 #endif
-    io = cpu_register_io_memory(ppc405_gpio_read, ppc405_gpio_write, gpio);
+    io = cpu_register_io_memory(ppc405_gpio_read, ppc405_gpio_write, gpio,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x038, io);
     qemu_register_reset(&ppc405_gpio_reset, gpio);
 }
@@ -1218,7 +1220,8 @@ static void ppc405_i2c_init(target_phys_addr_t base, qemu_irq irq)
 #ifdef DEBUG_I2C
     printf("%s: offset " TARGET_FMT_plx "\n", __func__, base);
 #endif
-    io = cpu_register_io_memory(i2c_read, i2c_write, i2c);
+    io = cpu_register_io_memory(i2c_read, i2c_write, i2c,
+                                DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x011, io);
     qemu_register_reset(ppc4xx_i2c_reset, i2c);
 }
@@ -1501,7 +1504,7 @@ static void ppc4xx_gpt_init(target_phys_addr_t base, qemu_irq irqs[5])
 #ifdef DEBUG_GPT
     printf("%s: offset " TARGET_FMT_plx "\n", __func__, base);
 #endif
-    io = cpu_register_io_memory(gpt_read, gpt_write, gpt);
+    io = cpu_register_io_memory(gpt_read, gpt_write, gpt, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x0d4, io);
     qemu_register_reset(ppc4xx_gpt_reset, gpt);
 }
diff --git a/hw/ppc4xx_pci.c b/hw/ppc4xx_pci.c
index 6e437e7..f2ecece 100644
--- a/hw/ppc4xx_pci.c
+++ b/hw/ppc4xx_pci.c
@@ -372,7 +372,8 @@ PCIBus *ppc4xx_pci_init(CPUState *env, qemu_irq pci_irqs[4],
 
     /* CFGADDR */
     index = cpu_register_io_memory(pci4xx_cfgaddr_read,
-                                   pci4xx_cfgaddr_write, controller);
+                                   pci4xx_cfgaddr_write, controller,
+                                   DEVICE_NATIVE_ENDIAN);
     if (index < 0)
         goto free;
     cpu_register_physical_memory(config_space + PCIC0_CFGADDR, 4, index);
@@ -384,7 +385,8 @@ PCIBus *ppc4xx_pci_init(CPUState *env, qemu_irq pci_irqs[4],
     cpu_register_physical_memory(config_space + PCIC0_CFGDATA, 4, index);
 
     /* Internal registers */
-    index = cpu_register_io_memory(pci_reg_read, pci_reg_write, controller);
+    index = cpu_register_io_memory(pci_reg_read, pci_reg_write, controller,
+                                   DEVICE_NATIVE_ENDIAN);
     if (index < 0)
         goto free;
     cpu_register_physical_memory(registers, PCI_REG_SIZE, index);
diff --git a/hw/ppc_newworld.c b/hw/ppc_newworld.c
index 305b2d4..49b046b 100644
--- a/hw/ppc_newworld.c
+++ b/hw/ppc_newworld.c
@@ -260,7 +260,8 @@ static void ppc_core99_init (ram_addr_t ram_size,
     isa_mmio_init(0xf2000000, 0x00800000, 1);
 
     /* UniN init */
-    unin_memory = cpu_register_io_memory(unin_read, unin_write, NULL);
+    unin_memory = cpu_register_io_memory(unin_read, unin_write, NULL,
+                                         DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0xf8000000, 0x00001000, unin_memory);
 
     openpic_irqs = qemu_mallocz(smp_cpus * sizeof(qemu_irq *));
diff --git a/hw/ppc_prep.c b/hw/ppc_prep.c
index b1f9cc7..80f5db6 100644
--- a/hw/ppc_prep.c
+++ b/hw/ppc_prep.c
@@ -690,7 +690,8 @@ static void ppc_prep_init (ram_addr_t ram_size,
     //    pci_bus = i440fx_init();
     /* Register 8 MB of ISA IO space (needed for non-contiguous map) */
     PPC_io_memory = cpu_register_io_memory(PPC_prep_io_read,
-                                           PPC_prep_io_write, sysctrl);
+                                           PPC_prep_io_write, sysctrl,
+                                           DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0x80000000, 0x00800000, PPC_io_memory);
 
     /* init basic PC hardware */
@@ -755,12 +756,13 @@ static void ppc_prep_init (ram_addr_t ram_size,
     register_ioport_write(0x0800, 0x52, 1, &PREP_io_800_writeb, sysctrl);
     /* PCI intack location */
     PPC_io_memory = cpu_register_io_memory(PPC_intack_read,
-                                           PPC_intack_write, NULL);
+                                           PPC_intack_write, NULL,
+                                           DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0xBFFFFFF0, 0x4, PPC_io_memory);
     /* PowerPC control and status register group */
 #if 0
     PPC_io_memory = cpu_register_io_memory(PPC_XCSR_read, PPC_XCSR_write,
-                                           NULL);
+                                           NULL, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0xFEFF0000, 0x1000, PPC_io_memory);
 #endif
 
diff --git a/hw/ppce500_pci.c b/hw/ppce500_pci.c
index 8ac99f2..71302ba 100644
--- a/hw/ppce500_pci.c
+++ b/hw/ppce500_pci.c
@@ -304,7 +304,8 @@ PCIBus *ppce500_pci_init(qemu_irq pci_irqs[4], target_phys_addr_t registers)
     cpu_register_physical_memory(registers + PCIE500_CFGDATA, 4, index);
 
     index = cpu_register_io_memory(e500_pci_reg_read,
-                                   e500_pci_reg_write, controller);
+                                   e500_pci_reg_write, controller,
+                                   DEVICE_NATIVE_ENDIAN);
     if (index < 0)
         goto free;
     cpu_register_physical_memory(registers + PCIE500_REG_BASE,
diff --git a/hw/prep_pci.c b/hw/prep_pci.c
index 0c2afe9..f88b825 100644
--- a/hw/prep_pci.c
+++ b/hw/prep_pci.c
@@ -125,7 +125,8 @@ PCIBus *pci_prep_init(qemu_irq *pic)
     pci_host_data_register_ioport(0xcfc, s);
 
     PPC_io_memory = cpu_register_io_memory(PPC_PCIIO_read,
-                                           PPC_PCIIO_write, s);
+                                           PPC_PCIIO_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0x80800000, 0x00400000, PPC_io_memory);
 
     /* PCI host bridge */
diff --git a/hw/pxa2xx.c b/hw/pxa2xx.c
index 6e04645..ab524a7 100644
--- a/hw/pxa2xx.c
+++ b/hw/pxa2xx.c
@@ -859,7 +859,8 @@ static int pxa2xx_ssp_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->irq);
 
     iomemtype = cpu_register_io_memory(pxa2xx_ssp_readfn,
-                                       pxa2xx_ssp_writefn, s);
+                                       pxa2xx_ssp_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     register_savevm(&dev->qdev, "pxa2xx_ssp", -1, 0,
                     pxa2xx_ssp_save, pxa2xx_ssp_load, s);
@@ -1512,7 +1513,7 @@ PXA2xxI2CState *pxa2xx_i2c_init(target_phys_addr_t base,
     s->offset = base - (base & (~region_size) & TARGET_PAGE_MASK);
 
     iomemtype = cpu_register_io_memory(pxa2xx_i2c_readfn,
-                    pxa2xx_i2c_writefn, s);
+                    pxa2xx_i2c_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base & ~region_size,
                     region_size + 1, iomemtype);
 
@@ -1749,7 +1750,7 @@ static PXA2xxI2SState *pxa2xx_i2s_init(target_phys_addr_t base,
     pxa2xx_i2s_reset(s);
 
     iomemtype = cpu_register_io_memory(pxa2xx_i2s_readfn,
-                    pxa2xx_i2s_writefn, s);
+                    pxa2xx_i2s_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x100000, iomemtype);
 
     register_savevm(NULL, "pxa2xx_i2s", base, 0,
@@ -2009,7 +2010,7 @@ static PXA2xxFIrState *pxa2xx_fir_init(target_phys_addr_t base,
     pxa2xx_fir_reset(s);
 
     iomemtype = cpu_register_io_memory(pxa2xx_fir_readfn,
-                    pxa2xx_fir_writefn, s);
+                    pxa2xx_fir_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x1000, iomemtype);
 
     if (chr)
@@ -2102,7 +2103,7 @@ PXA2xxState *pxa270_init(unsigned int sdram_size, const char *revision)
     s->cm_regs[CCCR >> 2] = 0x02000210;	/* 416.0 MHz */
     s->clkcfg = 0x00000009;		/* Turbo mode active */
     iomemtype = cpu_register_io_memory(pxa2xx_cm_readfn,
-                    pxa2xx_cm_writefn, s);
+                    pxa2xx_cm_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(s->cm_base, 0x1000, iomemtype);
     register_savevm(NULL, "pxa2xx_cm", 0, 0, pxa2xx_cm_save, pxa2xx_cm_load, s);
 
@@ -2113,13 +2114,13 @@ PXA2xxState *pxa270_init(unsigned int sdram_size, const char *revision)
     s->mm_regs[MDREFR >> 2] = 0x03ca4000;
     s->mm_regs[MECR >> 2] = 0x00000001;	/* Two PC Card sockets */
     iomemtype = cpu_register_io_memory(pxa2xx_mm_readfn,
-                    pxa2xx_mm_writefn, s);
+                    pxa2xx_mm_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(s->mm_base, 0x1000, iomemtype);
     register_savevm(NULL, "pxa2xx_mm", 0, 0, pxa2xx_mm_save, pxa2xx_mm_load, s);
 
     s->pm_base = 0x40f00000;
     iomemtype = cpu_register_io_memory(pxa2xx_pm_readfn,
-                    pxa2xx_pm_writefn, s);
+                    pxa2xx_pm_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(s->pm_base, 0x100, iomemtype);
     register_savevm(NULL, "pxa2xx_pm", 0, 0, pxa2xx_pm_save, pxa2xx_pm_load, s);
 
@@ -2142,7 +2143,7 @@ PXA2xxState *pxa270_init(unsigned int sdram_size, const char *revision)
 
     s->rtc_base = 0x40900000;
     iomemtype = cpu_register_io_memory(pxa2xx_rtc_readfn,
-                    pxa2xx_rtc_writefn, s);
+                    pxa2xx_rtc_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(s->rtc_base, 0x1000, iomemtype);
     pxa2xx_rtc_init(s);
     register_savevm(NULL, "pxa2xx_rtc", 0, 0, pxa2xx_rtc_save,
@@ -2225,7 +2226,7 @@ PXA2xxState *pxa255_init(unsigned int sdram_size)
     s->cm_regs[CCCR >> 2] = 0x02000210;	/* 416.0 MHz */
     s->clkcfg = 0x00000009;		/* Turbo mode active */
     iomemtype = cpu_register_io_memory(pxa2xx_cm_readfn,
-                    pxa2xx_cm_writefn, s);
+                    pxa2xx_cm_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(s->cm_base, 0x1000, iomemtype);
     register_savevm(NULL, "pxa2xx_cm", 0, 0, pxa2xx_cm_save, pxa2xx_cm_load, s);
 
@@ -2236,13 +2237,13 @@ PXA2xxState *pxa255_init(unsigned int sdram_size)
     s->mm_regs[MDREFR >> 2] = 0x03ca4000;
     s->mm_regs[MECR >> 2] = 0x00000001;	/* Two PC Card sockets */
     iomemtype = cpu_register_io_memory(pxa2xx_mm_readfn,
-                    pxa2xx_mm_writefn, s);
+                    pxa2xx_mm_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(s->mm_base, 0x1000, iomemtype);
     register_savevm(NULL, "pxa2xx_mm", 0, 0, pxa2xx_mm_save, pxa2xx_mm_load, s);
 
     s->pm_base = 0x40f00000;
     iomemtype = cpu_register_io_memory(pxa2xx_pm_readfn,
-                    pxa2xx_pm_writefn, s);
+                    pxa2xx_pm_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(s->pm_base, 0x100, iomemtype);
     register_savevm(NULL, "pxa2xx_pm", 0, 0, pxa2xx_pm_save, pxa2xx_pm_load, s);
 
@@ -2265,7 +2266,7 @@ PXA2xxState *pxa255_init(unsigned int sdram_size)
 
     s->rtc_base = 0x40900000;
     iomemtype = cpu_register_io_memory(pxa2xx_rtc_readfn,
-                    pxa2xx_rtc_writefn, s);
+                    pxa2xx_rtc_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(s->rtc_base, 0x1000, iomemtype);
     pxa2xx_rtc_init(s);
     register_savevm(NULL, "pxa2xx_rtc", 0, 0, pxa2xx_rtc_save,
diff --git a/hw/pxa2xx_dma.c b/hw/pxa2xx_dma.c
index 9c479df..b512d34 100644
--- a/hw/pxa2xx_dma.c
+++ b/hw/pxa2xx_dma.c
@@ -504,7 +504,7 @@ static PXA2xxDMAState *pxa2xx_dma_init(target_phys_addr_t base,
     memset(s->req, 0, sizeof(uint8_t) * PXA2XX_DMA_NUM_REQUESTS);
 
     iomemtype = cpu_register_io_memory(pxa2xx_dma_readfn,
-                    pxa2xx_dma_writefn, s);
+                    pxa2xx_dma_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00010000, iomemtype);
 
     register_savevm(NULL, "pxa2xx_dma", 0, 0, pxa2xx_dma_save, pxa2xx_dma_load, s);
diff --git a/hw/pxa2xx_gpio.c b/hw/pxa2xx_gpio.c
index 2abcb65..0d03446 100644
--- a/hw/pxa2xx_gpio.c
+++ b/hw/pxa2xx_gpio.c
@@ -309,7 +309,7 @@ PXA2xxGPIOInfo *pxa2xx_gpio_init(target_phys_addr_t base,
     s->in = qemu_allocate_irqs(pxa2xx_gpio_set, s, lines);
 
     iomemtype = cpu_register_io_memory(pxa2xx_gpio_readfn,
-                    pxa2xx_gpio_writefn, s);
+                    pxa2xx_gpio_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00001000, iomemtype);
 
     register_savevm(NULL, "pxa2xx_gpio", 0, 0,
diff --git a/hw/pxa2xx_keypad.c b/hw/pxa2xx_keypad.c
index dfa8945..4c99917 100644
--- a/hw/pxa2xx_keypad.c
+++ b/hw/pxa2xx_keypad.c
@@ -314,7 +314,7 @@ PXA2xxKeyPadState *pxa27x_keypad_init(target_phys_addr_t base,
     s->irq = irq;
 
     iomemtype = cpu_register_io_memory(pxa2xx_keypad_readfn,
-                    pxa2xx_keypad_writefn, s);
+                    pxa2xx_keypad_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00100000, iomemtype);
 
     register_savevm(NULL, "pxa2xx_keypad", 0, 0,
diff --git a/hw/pxa2xx_lcd.c b/hw/pxa2xx_lcd.c
index 111a0dc..1f2211a 100644
--- a/hw/pxa2xx_lcd.c
+++ b/hw/pxa2xx_lcd.c
@@ -929,7 +929,7 @@ PXA2xxLCDState *pxa2xx_lcdc_init(target_phys_addr_t base, qemu_irq irq)
     pxa2xx_lcdc_orientation(s, graphic_rotate);
 
     iomemtype = cpu_register_io_memory(pxa2xx_lcdc_readfn,
-                    pxa2xx_lcdc_writefn, s);
+                    pxa2xx_lcdc_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00100000, iomemtype);
 
     s->ds = graphic_console_init(pxa2xx_update_display,
diff --git a/hw/pxa2xx_mmci.c b/hw/pxa2xx_mmci.c
index ca98660..24d409d 100644
--- a/hw/pxa2xx_mmci.c
+++ b/hw/pxa2xx_mmci.c
@@ -528,7 +528,7 @@ PXA2xxMMCIState *pxa2xx_mmci_init(target_phys_addr_t base,
     s->dma = dma;
 
     iomemtype = cpu_register_io_memory(pxa2xx_mmci_readfn,
-                    pxa2xx_mmci_writefn, s);
+                    pxa2xx_mmci_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00100000, iomemtype);
 
     /* Instantiate the actual storage */
diff --git a/hw/pxa2xx_pcmcia.c b/hw/pxa2xx_pcmcia.c
index be1309f..50d4649 100644
--- a/hw/pxa2xx_pcmcia.c
+++ b/hw/pxa2xx_pcmcia.c
@@ -140,19 +140,19 @@ PXA2xxPCMCIAState *pxa2xx_pcmcia_init(target_phys_addr_t base)
 
     /* Socket I/O Memory Space */
     iomemtype = cpu_register_io_memory(pxa2xx_pcmcia_io_readfn,
-                    pxa2xx_pcmcia_io_writefn, s);
+                    pxa2xx_pcmcia_io_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base | 0x00000000, 0x04000000, iomemtype);
 
     /* Then next 64 MB is reserved */
 
     /* Socket Attribute Memory Space */
     iomemtype = cpu_register_io_memory(pxa2xx_pcmcia_attr_readfn,
-                    pxa2xx_pcmcia_attr_writefn, s);
+                    pxa2xx_pcmcia_attr_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base | 0x08000000, 0x04000000, iomemtype);
 
     /* Socket Common Memory Space */
     iomemtype = cpu_register_io_memory(pxa2xx_pcmcia_common_readfn,
-                    pxa2xx_pcmcia_common_writefn, s);
+                    pxa2xx_pcmcia_common_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base | 0x0c000000, 0x04000000, iomemtype);
 
     if (base == 0x30000000)
diff --git a/hw/pxa2xx_pic.c b/hw/pxa2xx_pic.c
index 4d8944b..a36da23 100644
--- a/hw/pxa2xx_pic.c
+++ b/hw/pxa2xx_pic.c
@@ -300,7 +300,7 @@ qemu_irq *pxa2xx_pic_init(target_phys_addr_t base, CPUState *env)
 
     /* Enable IC memory-mapped registers access.  */
     iomemtype = cpu_register_io_memory(pxa2xx_pic_readfn,
-                    pxa2xx_pic_writefn, s);
+                    pxa2xx_pic_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00100000, iomemtype);
 
     /* Enable IC coprocessor access.  */
diff --git a/hw/pxa2xx_timer.c b/hw/pxa2xx_timer.c
index 0f0ffd3..b556d11 100644
--- a/hw/pxa2xx_timer.c
+++ b/hw/pxa2xx_timer.c
@@ -452,7 +452,7 @@ static pxa2xx_timer_info *pxa2xx_timer_init(target_phys_addr_t base,
     }
 
     iomemtype = cpu_register_io_memory(pxa2xx_timer_readfn,
-                    pxa2xx_timer_writefn, s);
+                    pxa2xx_timer_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00001000, iomemtype);
 
     register_savevm(NULL, "pxa2xx_timer", 0, 0,
diff --git a/hw/r2d.c b/hw/r2d.c
index a58f653..c4f32ef 100644
--- a/hw/r2d.c
+++ b/hw/r2d.c
@@ -189,7 +189,8 @@ static qemu_irq *r2d_fpga_init(target_phys_addr_t base, qemu_irq irl)
     s->irl = irl;
 
     iomemtype = cpu_register_io_memory(r2d_fpga_readfn,
-				       r2d_fpga_writefn, s);
+				       r2d_fpga_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x40, iomemtype);
     return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
 }
diff --git a/hw/rc4030.c b/hw/rc4030.c
index abbc3eb..0a9d98d 100644
--- a/hw/rc4030.c
+++ b/hw/rc4030.c
@@ -819,9 +819,11 @@ void *rc4030_init(qemu_irq timer, qemu_irq jazz_bus,
     register_savevm(NULL, "rc4030", 0, 2, rc4030_save, rc4030_load, s);
     rc4030_reset(s);
 
-    s_chipset = cpu_register_io_memory(rc4030_read, rc4030_write, s);
+    s_chipset = cpu_register_io_memory(rc4030_read, rc4030_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0x80000000, 0x300, s_chipset);
-    s_jazzio = cpu_register_io_memory(jazzio_read, jazzio_write, s);
+    s_jazzio = cpu_register_io_memory(jazzio_read, jazzio_write, s,
+                                      DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0xf0000000, 0x00001000, s_jazzio);
 
     return s;
diff --git a/hw/realview.c b/hw/realview.c
index e9fcbc9..6eb6c6a 100644
--- a/hw/realview.c
+++ b/hw/realview.c
@@ -81,7 +81,8 @@ static int realview_i2c_init(SysBusDevice *dev)
     bus = i2c_init_bus(&dev->qdev, "i2c");
     s->bitbang = bitbang_i2c_init(bus);
     iomemtype = cpu_register_io_memory(realview_i2c_readfn,
-                                       realview_i2c_writefn, s);
+                                       realview_i2c_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     return 0;
 }
diff --git a/hw/realview_gic.c b/hw/realview_gic.c
index bd02b09..db908b6 100644
--- a/hw/realview_gic.c
+++ b/hw/realview_gic.c
@@ -64,7 +64,8 @@ static int realview_gic_init(SysBusDevice *dev)
 
     gic_init(&s->gic);
     s->iomemtype = cpu_register_io_memory(realview_gic_cpu_readfn,
-                                          realview_gic_cpu_writefn, s);
+                                          realview_gic_cpu_writefn, s,
+                                          DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio_cb(dev, 0x2000, realview_gic_map);
     return 0;
 }
diff --git a/hw/rtl8139.c b/hw/rtl8139.c
index d92981d..30a3960 100644
--- a/hw/rtl8139.c
+++ b/hw/rtl8139.c
@@ -3366,7 +3366,8 @@ static int pci_rtl8139_init(PCIDevice *dev)
 
     /* I/O handler for memory-mapped I/O */
     s->rtl8139_mmio_io_addr =
-        cpu_register_io_memory(rtl8139_mmio_read, rtl8139_mmio_write, s);
+        cpu_register_io_memory(rtl8139_mmio_read, rtl8139_mmio_write, s,
+                               DEVICE_NATIVE_ENDIAN);
 
     pci_register_bar(&s->dev, 0, 0x100,
                            PCI_BASE_ADDRESS_SPACE_IO,  rtl8139_ioport_map);
diff --git a/hw/sbi.c b/hw/sbi.c
index c4adc09..53f66f2 100644
--- a/hw/sbi.c
+++ b/hw/sbi.c
@@ -125,7 +125,8 @@ static int sbi_init1(SysBusDevice *dev)
         sysbus_init_irq(dev, &s->cpu_irqs[i]);
     }
 
-    sbi_io_memory = cpu_register_io_memory(sbi_mem_read, sbi_mem_write, s);
+    sbi_io_memory = cpu_register_io_memory(sbi_mem_read, sbi_mem_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, SBI_SIZE, sbi_io_memory);
 
     return 0;
diff --git a/hw/serial.c b/hw/serial.c
index 9ebc452..d21cbe9 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -955,10 +955,12 @@ SerialState *serial_mm_init (target_phys_addr_t base, int it_shift,
     if (ioregister) {
         if (be) {
             s_io_memory = cpu_register_io_memory(serial_mm_read_be,
-                                                 serial_mm_write_be, s);
+                                                 serial_mm_write_be, s,
+                                                 DEVICE_NATIVE_ENDIAN);
         } else {
             s_io_memory = cpu_register_io_memory(serial_mm_read_le,
-                                                 serial_mm_write_le, s);
+                                                 serial_mm_write_le, s,
+                                                 DEVICE_NATIVE_ENDIAN);
         }
         cpu_register_physical_memory(base, 8 << it_shift, s_io_memory);
     }
diff --git a/hw/sh7750.c b/hw/sh7750.c
index 0291d5f..9e54ad1 100644
--- a/hw/sh7750.c
+++ b/hw/sh7750.c
@@ -713,7 +713,8 @@ SH7750State *sh7750_init(CPUSH4State * cpu)
     s->cpu = cpu;
     s->periph_freq = 60000000;	/* 60MHz */
     sh7750_io_memory = cpu_register_io_memory(sh7750_mem_read,
-					      sh7750_mem_write, s);
+					      sh7750_mem_write, s,
+                                              DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory_offset(0x1f000000, 0x1000,
                                         sh7750_io_memory, 0x1f000000);
     cpu_register_physical_memory_offset(0xff000000, 0x1000,
@@ -728,7 +729,8 @@ SH7750State *sh7750_init(CPUSH4State * cpu)
                                         sh7750_io_memory, 0x1fc00000);
 
     sh7750_mm_cache_and_tlb = cpu_register_io_memory(sh7750_mmct_read,
-						     sh7750_mmct_write, s);
+						     sh7750_mmct_write, s,
+                                                     DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0xf0000000, 0x08000000,
 				 sh7750_mm_cache_and_tlb);
 
diff --git a/hw/sh_intc.c b/hw/sh_intc.c
index d3f5ea5..0734da9 100644
--- a/hw/sh_intc.c
+++ b/hw/sh_intc.c
@@ -442,7 +442,8 @@ int sh_intc_init(struct intc_desc *desc,
     desc->irqs = qemu_allocate_irqs(sh_intc_set_irq, desc, nr_sources);
  
     desc->iomemtype = cpu_register_io_memory(sh_intc_readfn,
-					     sh_intc_writefn, desc);
+					     sh_intc_writefn, desc,
+                                             DEVICE_NATIVE_ENDIAN);
     if (desc->mask_regs) {
         for (i = 0; i < desc->nr_mask_regs; i++) {
 	    struct intc_mask_reg *mr = desc->mask_regs + i;
diff --git a/hw/sh_pci.c b/hw/sh_pci.c
index cc2f190..6042d9c 100644
--- a/hw/sh_pci.c
+++ b/hw/sh_pci.c
@@ -103,7 +103,8 @@ PCIBus *sh_pci_register_bus(pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
 
     p->dev = pci_register_device(p->bus, "SH PCIC", sizeof(PCIDevice),
                                  -1, NULL, NULL);
-    reg = cpu_register_io_memory(sh_pci_reg.r, sh_pci_reg.w, p);
+    reg = cpu_register_io_memory(sh_pci_reg.r, sh_pci_reg.w, p,
+                                 DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(0x1e200000, 0x224, reg);
     cpu_register_physical_memory(0xfe200000, 0x224, reg);
 
diff --git a/hw/sh_serial.c b/hw/sh_serial.c
index 93dc144..1bdc0a5 100644
--- a/hw/sh_serial.c
+++ b/hw/sh_serial.c
@@ -395,7 +395,8 @@ void sh_serial_init (target_phys_addr_t base, int feat,
     sh_serial_clear_fifo(s);
 
     s_io_memory = cpu_register_io_memory(sh_serial_readfn,
-					 sh_serial_writefn, s);
+					 sh_serial_writefn, s,
+                                         DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(P4ADDR(base), 0x28, s_io_memory);
     cpu_register_physical_memory(A7ADDR(base), 0x28, s_io_memory);
 
diff --git a/hw/sh_timer.c b/hw/sh_timer.c
index fd2146a..5eec6b7 100644
--- a/hw/sh_timer.c
+++ b/hw/sh_timer.c
@@ -319,7 +319,8 @@ void tmu012_init(target_phys_addr_t base, int feat, uint32_t freq,
         s->timer[2] = sh_timer_init(freq, timer_feat | TIMER_FEAT_CAPT,
 				    ch2_irq0); /* ch2_irq1 not supported */
     iomemtype = cpu_register_io_memory(tmu012_readfn,
-                                       tmu012_writefn, s);
+                                       tmu012_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(P4ADDR(base), 0x00001000, iomemtype);
     cpu_register_physical_memory(A7ADDR(base), 0x00001000, iomemtype);
     /* ??? Save/restore.  */
diff --git a/hw/slavio_intctl.c b/hw/slavio_intctl.c
index 9d5ad86..fd69354 100644
--- a/hw/slavio_intctl.c
+++ b/hw/slavio_intctl.c
@@ -422,7 +422,8 @@ static int slavio_intctl_init1(SysBusDevice *dev)
 
     qdev_init_gpio_in(&dev->qdev, slavio_set_irq_all, 32 + MAX_CPUS);
     io_memory = cpu_register_io_memory(slavio_intctlm_mem_read,
-                                       slavio_intctlm_mem_write, s);
+                                       slavio_intctlm_mem_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, INTCTLM_SIZE, io_memory);
 
     for (i = 0; i < MAX_CPUS; i++) {
@@ -431,7 +432,8 @@ static int slavio_intctl_init1(SysBusDevice *dev)
         }
         io_memory = cpu_register_io_memory(slavio_intctl_mem_read,
                                            slavio_intctl_mem_write,
-                                           &s->slaves[i]);
+                                           &s->slaves[i],
+                                           DEVICE_NATIVE_ENDIAN);
         sysbus_init_mmio(dev, INTCTL_SIZE, io_memory);
         s->slaves[i].cpu = i;
         s->slaves[i].master = s;
diff --git a/hw/slavio_misc.c b/hw/slavio_misc.c
index 1d81a63..198360d 100644
--- a/hw/slavio_misc.c
+++ b/hw/slavio_misc.c
@@ -412,7 +412,8 @@ static int apc_init1(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->cpu_halt);
 
     /* Power management (APC) XXX: not a Slavio device */
-    io = cpu_register_io_memory(apc_mem_read, apc_mem_write, s);
+    io = cpu_register_io_memory(apc_mem_read, apc_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MISC_SIZE, io);
     return 0;
 }
@@ -428,39 +429,46 @@ static int slavio_misc_init1(SysBusDevice *dev)
     /* 8 bit registers */
     /* Slavio control */
     io = cpu_register_io_memory(slavio_cfg_mem_read,
-                                slavio_cfg_mem_write, s);
+                                slavio_cfg_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MISC_SIZE, io);
 
     /* Diagnostics */
     io = cpu_register_io_memory(slavio_diag_mem_read,
-                                slavio_diag_mem_write, s);
+                                slavio_diag_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MISC_SIZE, io);
 
     /* Modem control */
     io = cpu_register_io_memory(slavio_mdm_mem_read,
-                                slavio_mdm_mem_write, s);
+                                slavio_mdm_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MISC_SIZE, io);
 
     /* 16 bit registers */
     /* ss600mp diag LEDs */
     io = cpu_register_io_memory(slavio_led_mem_read,
-                                slavio_led_mem_write, s);
+                                slavio_led_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MISC_SIZE, io);
 
     /* 32 bit registers */
     /* System control */
     io = cpu_register_io_memory(slavio_sysctrl_mem_read,
-                                slavio_sysctrl_mem_write, s);
+                                slavio_sysctrl_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, SYSCTRL_SIZE, io);
 
     /* AUX 1 (Misc System Functions) */
     io = cpu_register_io_memory(slavio_aux1_mem_read,
-                                slavio_aux1_mem_write, s);
+                                slavio_aux1_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MISC_SIZE, io);
 
     /* AUX 2 (Software Powerdown Control) */
     io = cpu_register_io_memory(slavio_aux2_mem_read,
-                                slavio_aux2_mem_write, s);
+                                slavio_aux2_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, MISC_SIZE, io);
 
     qdev_init_gpio_in(&dev->qdev, slavio_set_power_fail, 1);
diff --git a/hw/slavio_timer.c b/hw/slavio_timer.c
index 13f1e62..5511313 100644
--- a/hw/slavio_timer.c
+++ b/hw/slavio_timer.c
@@ -390,7 +390,8 @@ static int slavio_timer_init1(SysBusDevice *dev)
         ptimer_set_period(s->cputimer[i].timer, TIMER_PERIOD);
 
         io = cpu_register_io_memory(slavio_timer_mem_read,
-                                    slavio_timer_mem_write, tc);
+                                    slavio_timer_mem_write, tc,
+                                    DEVICE_NATIVE_ENDIAN);
         if (i == 0) {
             sysbus_init_mmio(dev, SYS_TIMER_SIZE, io);
         } else {
diff --git a/hw/sm501.c b/hw/sm501.c
index 705e0a5..f16e6e4 100644
--- a/hw/sm501.c
+++ b/hw/sm501.c
@@ -1379,15 +1379,18 @@ void sm501_init(uint32_t base, uint32_t local_mem_bytes, qemu_irq irq,
     /* map mmio */
     sm501_system_config_index
 	= cpu_register_io_memory(sm501_system_config_readfn,
-				 sm501_system_config_writefn, s);
+				 sm501_system_config_writefn, s,
+                                 DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base + MMIO_BASE_OFFSET,
 				 0x6c, sm501_system_config_index);
     sm501_disp_ctrl_index = cpu_register_io_memory(sm501_disp_ctrl_readfn,
-						   sm501_disp_ctrl_writefn, s);
+						   sm501_disp_ctrl_writefn, s,
+                                                   DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base + MMIO_BASE_OFFSET + SM501_DC,
                                  0x1000, sm501_disp_ctrl_index);
     sm501_2d_engine_index = cpu_register_io_memory(sm501_2d_engine_readfn,
-                                                   sm501_2d_engine_writefn, s);
+                                                   sm501_2d_engine_writefn, s,
+                                                   DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base + MMIO_BASE_OFFSET + SM501_2D_ENGINE,
                                  0x54, sm501_2d_engine_index);
 
diff --git a/hw/smc91c111.c b/hw/smc91c111.c
index f7d58e1..fc714d7 100644
--- a/hw/smc91c111.c
+++ b/hw/smc91c111.c
@@ -719,7 +719,8 @@ static int smc91c111_init1(SysBusDevice *dev)
     smc91c111_state *s = FROM_SYSBUS(smc91c111_state, dev);
 
     s->mmio_index = cpu_register_io_memory(smc91c111_readfn,
-                                           smc91c111_writefn, s);
+                                           smc91c111_writefn, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 16, s->mmio_index);
     sysbus_init_irq(dev, &s->irq);
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
diff --git a/hw/sparc32_dma.c b/hw/sparc32_dma.c
index 0904188..e78f025 100644
--- a/hw/sparc32_dma.c
+++ b/hw/sparc32_dma.c
@@ -257,7 +257,8 @@ static int sparc32_dma_init1(SysBusDevice *dev)
 
     sysbus_init_irq(dev, &s->irq);
 
-    dma_io_memory = cpu_register_io_memory(dma_mem_read, dma_mem_write, s);
+    dma_io_memory = cpu_register_io_memory(dma_mem_read, dma_mem_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, DMA_SIZE, dma_io_memory);
 
     qdev_init_gpio_in(&dev->qdev, dma_set_irq, 1);
diff --git a/hw/spitz.c b/hw/spitz.c
index a064460..092bb64 100644
--- a/hw/spitz.c
+++ b/hw/spitz.c
@@ -176,7 +176,7 @@ static void sl_flash_register(PXA2xxState *cpu, int size)
         s->nand = nand_init(NAND_MFR_SAMSUNG, 0xf1);
 
     iomemtype = cpu_register_io_memory(sl_readfn,
-                    sl_writefn, s);
+                    sl_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(FLASH_BASE, 0x40, iomemtype);
 
     register_savevm(NULL, "sl_flash", 0, 0, sl_save, sl_load, s);
diff --git a/hw/stellaris.c b/hw/stellaris.c
index ccad134..b903273 100644
--- a/hw/stellaris.c
+++ b/hw/stellaris.c
@@ -348,7 +348,8 @@ static int stellaris_gptm_init(SysBusDevice *dev)
     qdev_init_gpio_out(&dev->qdev, &s->trigger, 1);
 
     iomemtype = cpu_register_io_memory(gptm_readfn,
-                                       gptm_writefn, s);
+                                       gptm_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
 
     s->opaque[0] = s->opaque[1] = s;
@@ -671,7 +672,8 @@ static int stellaris_sys_init(uint32_t base, qemu_irq irq,
     s->user1 = macaddr[3] | (macaddr[4] << 8) | (macaddr[5] << 16);
 
     iomemtype = cpu_register_io_memory(ssys_readfn,
-                                       ssys_writefn, s);
+                                       ssys_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x00001000, iomemtype);
     ssys_reset(s);
     register_savevm(NULL, "stellaris_sys", -1, 1, ssys_save, ssys_load, s);
@@ -884,7 +886,8 @@ static int stellaris_i2c_init(SysBusDevice * dev)
     s->bus = bus;
 
     iomemtype = cpu_register_io_memory(stellaris_i2c_readfn,
-                                       stellaris_i2c_writefn, s);
+                                       stellaris_i2c_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     /* ??? For now we only implement the master interface.  */
     stellaris_i2c_reset(s);
@@ -1193,7 +1196,8 @@ static int stellaris_adc_init(SysBusDevice *dev)
     }
 
     iomemtype = cpu_register_io_memory(stellaris_adc_readfn,
-                                       stellaris_adc_writefn, s);
+                                       stellaris_adc_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     stellaris_adc_reset(s);
     qdev_init_gpio_in(&dev->qdev, stellaris_adc_trigger, 1);
diff --git a/hw/stellaris_enet.c b/hw/stellaris_enet.c
index 330a9d6..6a0583a 100644
--- a/hw/stellaris_enet.c
+++ b/hw/stellaris_enet.c
@@ -409,7 +409,8 @@ static int stellaris_enet_init(SysBusDevice *dev)
     stellaris_enet_state *s = FROM_SYSBUS(stellaris_enet_state, dev);
 
     s->mmio_index = cpu_register_io_memory(stellaris_enet_readfn,
-                                           stellaris_enet_writefn, s);
+                                           stellaris_enet_writefn, s,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, s->mmio_index);
     sysbus_init_irq(dev, &s->irq);
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
diff --git a/hw/sun4c_intctl.c b/hw/sun4c_intctl.c
index 7d7542d..5c7fdef 100644
--- a/hw/sun4c_intctl.c
+++ b/hw/sun4c_intctl.c
@@ -196,7 +196,8 @@ static int sun4c_intctl_init1(SysBusDevice *dev)
     unsigned int i;
 
     io_memory = cpu_register_io_memory(sun4c_intctl_mem_read,
-                                       sun4c_intctl_mem_write, s);
+                                       sun4c_intctl_mem_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, INTCTL_SIZE, io_memory);
     qdev_init_gpio_in(&dev->qdev, sun4c_set_irq, 8);
 
diff --git a/hw/sun4m_iommu.c b/hw/sun4m_iommu.c
index 720ee3f..bba69ee 100644
--- a/hw/sun4m_iommu.c
+++ b/hw/sun4m_iommu.c
@@ -351,7 +351,8 @@ static int iommu_init1(SysBusDevice *dev)
 
     sysbus_init_irq(dev, &s->irq);
 
-    io = cpu_register_io_memory(iommu_mem_read, iommu_mem_write, s);
+    io = cpu_register_io_memory(iommu_mem_read, iommu_mem_write, s,
+                                DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, IOMMU_NREGS * sizeof(uint32_t), io);
 
     return 0;
diff --git a/hw/syborg_fb.c b/hw/syborg_fb.c
index ed57203..7e37364 100644
--- a/hw/syborg_fb.c
+++ b/hw/syborg_fb.c
@@ -510,7 +510,8 @@ static int syborg_fb_init(SysBusDevice *dev)
 
     sysbus_init_irq(dev, &s->irq);
     iomemtype = cpu_register_io_memory(syborg_fb_readfn,
-                                       syborg_fb_writefn, s);
+                                       syborg_fb_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
 
     s->ds = graphic_console_init(syborg_fb_update_display,
diff --git a/hw/syborg_interrupt.c b/hw/syborg_interrupt.c
index 30140fb..5217983 100644
--- a/hw/syborg_interrupt.c
+++ b/hw/syborg_interrupt.c
@@ -210,7 +210,8 @@ static int syborg_int_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->parent_irq);
     qdev_init_gpio_in(&dev->qdev, syborg_int_set_irq, s->num_irqs);
     iomemtype = cpu_register_io_memory(syborg_int_readfn,
-                                       syborg_int_writefn, s);
+                                       syborg_int_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     s->flags = qemu_mallocz(s->num_irqs * sizeof(syborg_int_flags));
 
diff --git a/hw/syborg_keyboard.c b/hw/syborg_keyboard.c
index 7709100..d295e99 100644
--- a/hw/syborg_keyboard.c
+++ b/hw/syborg_keyboard.c
@@ -210,7 +210,8 @@ static int syborg_keyboard_init(SysBusDevice *dev)
 
     sysbus_init_irq(dev, &s->irq);
     iomemtype = cpu_register_io_memory(syborg_keyboard_readfn,
-                                       syborg_keyboard_writefn, s);
+                                       syborg_keyboard_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     if (s->fifo_size <= 0) {
         fprintf(stderr, "syborg_keyboard: fifo too small\n");
diff --git a/hw/syborg_pointer.c b/hw/syborg_pointer.c
index 69b8d96..a886888 100644
--- a/hw/syborg_pointer.c
+++ b/hw/syborg_pointer.c
@@ -206,7 +206,8 @@ static int syborg_pointer_init(SysBusDevice *dev)
 
     sysbus_init_irq(dev, &s->irq);
     iomemtype = cpu_register_io_memory(syborg_pointer_readfn,
-				       syborg_pointer_writefn, s);
+				       syborg_pointer_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
 
     if (s->fifo_size <= 0) {
diff --git a/hw/syborg_rtc.c b/hw/syborg_rtc.c
index 78d5edb..329aa42 100644
--- a/hw/syborg_rtc.c
+++ b/hw/syborg_rtc.c
@@ -130,7 +130,8 @@ static int syborg_rtc_init(SysBusDevice *dev)
     int iomemtype;
 
     iomemtype = cpu_register_io_memory(syborg_rtc_readfn,
-                                       syborg_rtc_writefn, s);
+                                       syborg_rtc_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
 
     qemu_get_timedate(&tm, 0);
diff --git a/hw/syborg_serial.c b/hw/syborg_serial.c
index 8c42956..34ce076 100644
--- a/hw/syborg_serial.c
+++ b/hw/syborg_serial.c
@@ -322,7 +322,8 @@ static int syborg_serial_init(SysBusDevice *dev)
 
     sysbus_init_irq(dev, &s->irq);
     iomemtype = cpu_register_io_memory(syborg_serial_readfn,
-                                       syborg_serial_writefn, s);
+                                       syborg_serial_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     s->chr = qdev_init_chardev(&dev->qdev);
     if (s->chr) {
diff --git a/hw/syborg_timer.c b/hw/syborg_timer.c
index 95e07d7..cedcd8e 100644
--- a/hw/syborg_timer.c
+++ b/hw/syborg_timer.c
@@ -215,7 +215,8 @@ static int syborg_timer_init(SysBusDevice *dev)
     }
     sysbus_init_irq(dev, &s->irq);
     iomemtype = cpu_register_io_memory(syborg_timer_readfn,
-                                       syborg_timer_writefn, s);
+                                       syborg_timer_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
 
     bh = qemu_bh_new(syborg_timer_tick, s);
diff --git a/hw/syborg_virtio.c b/hw/syborg_virtio.c
index 4dfd1a8..ee08c49 100644
--- a/hw/syborg_virtio.c
+++ b/hw/syborg_virtio.c
@@ -265,7 +265,8 @@ static int syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev)
     proxy->vdev->nvectors = 0;
     sysbus_init_irq(&proxy->busdev, &proxy->irq);
     iomemtype = cpu_register_io_memory(syborg_virtio_readfn,
-                                       syborg_virtio_writefn, proxy);
+                                       syborg_virtio_writefn, proxy,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(&proxy->busdev, 0x1000, iomemtype);
 
     proxy->id = ((uint32_t)0x1af4 << 16) | vdev->device_id;
diff --git a/hw/tc6393xb.c b/hw/tc6393xb.c
index 16db51d..c3fbe4e 100644
--- a/hw/tc6393xb.c
+++ b/hw/tc6393xb.c
@@ -590,7 +590,7 @@ TC6393xbState *tc6393xb_init(uint32_t base, qemu_irq irq)
     s->flash = nand_init(NAND_MFR_TOSHIBA, 0x76);
 
     iomemtype = cpu_register_io_memory(tc6393xb_readfn,
-                    tc6393xb_writefn, s);
+                    tc6393xb_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(base, 0x10000, iomemtype);
 
     s->vram_addr = qemu_ram_alloc(NULL, "tc6393xb.vram", 0x100000);
diff --git a/hw/tcx.c b/hw/tcx.c
index 6ee65bb..0e32830 100644
--- a/hw/tcx.c
+++ b/hw/tcx.c
@@ -522,12 +522,13 @@ static int tcx_init1(SysBusDevice *dev)
     vram_base += size;
 
     /* DAC */
-    io_memory = cpu_register_io_memory(tcx_dac_read, tcx_dac_write, s);
+    io_memory = cpu_register_io_memory(tcx_dac_read, tcx_dac_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, TCX_DAC_NREGS, io_memory);
 
     /* TEC (dummy) */
     dummy_memory = cpu_register_io_memory(tcx_dummy_read, tcx_dummy_write,
-                                          s);
+                                          s, DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, TCX_TEC_NREGS, dummy_memory);
     /* THC: NetBSD writes here even with 8-bit display: dummy */
     sysbus_init_mmio(dev, TCX_THC_NREGS_24, dummy_memory);
diff --git a/hw/tusb6010.c b/hw/tusb6010.c
index 4864be5..0005e1c 100644
--- a/hw/tusb6010.c
+++ b/hw/tusb6010.c
@@ -740,7 +740,7 @@ TUSBState *tusb6010_init(qemu_irq intr)
     s->intr = 0x00000000;
     s->otg_timer_val = 0;
     s->iomemtype[1] = cpu_register_io_memory(tusb_async_readfn,
-                    tusb_async_writefn, s);
+                    tusb_async_writefn, s, DEVICE_NATIVE_ENDIAN);
     s->irq = intr;
     s->otg_timer = qemu_new_timer(vm_clock, tusb_otg_tick, s);
     s->pwr_timer = qemu_new_timer(vm_clock, tusb_power_tick, s);
diff --git a/hw/usb-ohci.c b/hw/usb-ohci.c
index 8fb2f83..ba1ebbc 100644
--- a/hw/usb-ohci.c
+++ b/hw/usb-ohci.c
@@ -1697,7 +1697,8 @@ static void usb_ohci_init(OHCIState *ohci, DeviceState *dev,
                 usb_frame_time, usb_bit_time);
     }
 
-    ohci->mem = cpu_register_io_memory(ohci_readfn, ohci_writefn, ohci);
+    ohci->mem = cpu_register_io_memory(ohci_readfn, ohci_writefn, ohci,
+                                       DEVICE_NATIVE_ENDIAN);
     ohci->localmem_base = localmem_base;
 
     ohci->name = dev->info->name;
diff --git a/hw/versatile_pci.c b/hw/versatile_pci.c
index a76bdfa..3baad96 100644
--- a/hw/versatile_pci.c
+++ b/hw/versatile_pci.c
@@ -132,7 +132,8 @@ static int pci_vpb_init(SysBusDevice *dev)
     /* ??? Register memory space.  */
 
     s->mem_config = cpu_register_io_memory(pci_vpb_config_read,
-                                           pci_vpb_config_write, bus);
+                                           pci_vpb_config_write, bus,
+                                           DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio_cb(dev, 0x04000000, pci_vpb_map);
 
     pci_create_simple(bus, -1, "versatile_pci_host");
diff --git a/hw/versatilepb.c b/hw/versatilepb.c
index c51ee02..be758e4 100644
--- a/hw/versatilepb.c
+++ b/hw/versatilepb.c
@@ -143,7 +143,8 @@ static int vpb_sic_init(SysBusDevice *dev)
     }
     s->irq = 31;
     iomemtype = cpu_register_io_memory(vpb_sic_readfn,
-                                       vpb_sic_writefn, s);
+                                       vpb_sic_writefn, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     /* ??? Save/restore.  */
     return 0;
diff --git a/hw/vga-isa-mm.c b/hw/vga-isa-mm.c
index 680b557..4954bb1 100644
--- a/hw/vga-isa-mm.c
+++ b/hw/vga-isa-mm.c
@@ -97,8 +97,10 @@ static void vga_mm_init(ISAVGAMMState *s, target_phys_addr_t vram_base,
     int s_ioport_ctrl, vga_io_memory;
 
     s->it_shift = it_shift;
-    s_ioport_ctrl = cpu_register_io_memory(vga_mm_read_ctrl, vga_mm_write_ctrl, s);
-    vga_io_memory = cpu_register_io_memory(vga_mem_read, vga_mem_write, s);
+    s_ioport_ctrl = cpu_register_io_memory(vga_mm_read_ctrl, vga_mm_write_ctrl, s,
+                                           DEVICE_NATIVE_ENDIAN);
+    vga_io_memory = cpu_register_io_memory(vga_mem_read, vga_mem_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
 
     vmstate_register(NULL, 0, &vmstate_vga_common, s);
 
diff --git a/hw/vga.c b/hw/vga.c
index c057f4f..b5c8741 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -2320,7 +2320,8 @@ void vga_init(VGACommonState *s)
 #endif
 #endif /* CONFIG_BOCHS_VBE */
 
-    vga_io_memory = cpu_register_io_memory(vga_mem_read, vga_mem_write, s);
+    vga_io_memory = cpu_register_io_memory(vga_mem_read, vga_mem_write, s,
+                                           DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(isa_mem_base + 0x000a0000, 0x20000,
                                  vga_io_memory);
     qemu_register_coalesced_mmio(isa_mem_base + 0x000a0000, 0x20000);
diff --git a/hw/vmware_vga.c b/hw/vmware_vga.c
index d0f4e1b..d9dd52f 100644
--- a/hw/vmware_vga.c
+++ b/hw/vmware_vga.c
@@ -1250,7 +1250,7 @@ static void pci_vmsvga_map_mem(PCIDevice *pci_dev, int region_num,
     s->vram_base = addr;
 #ifdef DIRECT_VRAM
     iomemtype = cpu_register_io_memory(vmsvga_vram_read,
-                    vmsvga_vram_write, s);
+                    vmsvga_vram_write, s, DEVICE_NATIVE_ENDIAN);
 #else
     iomemtype = s->vga.vram_offset | IO_MEM_RAM;
 #endif
diff --git a/hw/wdt_i6300esb.c b/hw/wdt_i6300esb.c
index 46e1df8..09f2f58 100644
--- a/hw/wdt_i6300esb.c
+++ b/hw/wdt_i6300esb.c
@@ -361,7 +361,8 @@ static void i6300esb_map(PCIDevice *dev, int region_num,
     i6300esb_debug("addr = %"FMT_PCIBUS", size = %"FMT_PCIBUS", type = %d\n",
                    addr, size, type);
 
-    io_mem = cpu_register_io_memory(mem_read, mem_write, d);
+    io_mem = cpu_register_io_memory(mem_read, mem_write, d,
+                                    DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory (addr, 0x10, io_mem);
     /* qemu_register_coalesced_mmio (addr, 0x10); ? */
 }
diff --git a/hw/xilinx_ethlite.c b/hw/xilinx_ethlite.c
index 37e33ec..54b57d7 100644
--- a/hw/xilinx_ethlite.c
+++ b/hw/xilinx_ethlite.c
@@ -224,7 +224,7 @@ static int xilinx_ethlite_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->irq);
     s->rxbuf = 0;
 
-    regs = cpu_register_io_memory(eth_read, eth_write, s);
+    regs = cpu_register_io_memory(eth_read, eth_write, s, DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, R_MAX * 4, regs);
 
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
diff --git a/hw/xilinx_intc.c b/hw/xilinx_intc.c
index 8ef6474..cb72d5a 100644
--- a/hw/xilinx_intc.c
+++ b/hw/xilinx_intc.c
@@ -153,7 +153,7 @@ static int xilinx_intc_init(SysBusDevice *dev)
     qdev_init_gpio_in(&dev->qdev, irq_handler, 32);
     sysbus_init_irq(dev, &p->parent_irq);
 
-    pic_regs = cpu_register_io_memory(pic_read, pic_write, p);
+    pic_regs = cpu_register_io_memory(pic_read, pic_write, p, DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, R_MAX * 4, pic_regs);
     return 0;
 }
diff --git a/hw/xilinx_timer.c b/hw/xilinx_timer.c
index e2d9541..30827b0 100644
--- a/hw/xilinx_timer.c
+++ b/hw/xilinx_timer.c
@@ -210,7 +210,8 @@ static int xilinx_timer_init(SysBusDevice *dev)
         ptimer_set_freq(xt->ptimer, t->freq_hz);
     }
 
-    timer_regs = cpu_register_io_memory(timer_read, timer_write, t);
+    timer_regs = cpu_register_io_memory(timer_read, timer_write, t,
+                                        DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, R_MAX * 4 * t->nr_timers, timer_regs);
     return 0;
 }
diff --git a/hw/xilinx_uartlite.c b/hw/xilinx_uartlite.c
index adab759..9b94e98 100644
--- a/hw/xilinx_uartlite.c
+++ b/hw/xilinx_uartlite.c
@@ -201,7 +201,8 @@ static int xilinx_uartlite_init(SysBusDevice *dev)
     sysbus_init_irq(dev, &s->irq);
 
     uart_update_status(s);
-    uart_regs = cpu_register_io_memory(uart_read, uart_write, s);
+    uart_regs = cpu_register_io_memory(uart_read, uart_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
     sysbus_init_mmio(dev, R_MAX * 4, uart_regs);
 
     s->chr = qdev_init_chardev(&dev->qdev);
diff --git a/hw/zaurus.c b/hw/zaurus.c
index dd999d7..54ec3f0 100644
--- a/hw/zaurus.c
+++ b/hw/zaurus.c
@@ -228,7 +228,7 @@ ScoopInfo *scoop_init(PXA2xxState *cpu,
     s->status = 0x02;
     s->in = qemu_allocate_irqs(scoop_gpio_set, s, 16);
     iomemtype = cpu_register_io_memory(scoop_readfn,
-                    scoop_writefn, s);
+                    scoop_writefn, s, DEVICE_NATIVE_ENDIAN);
     cpu_register_physical_memory(target_base, 0x1000, iomemtype);
     register_savevm(NULL, "scoop", instance, 1, scoop_save, scoop_load, s);
 
diff --git a/rwhandler.c b/rwhandler.c
index 1f9b6db..88dfcc5 100644
--- a/rwhandler.c
+++ b/rwhandler.c
@@ -42,7 +42,7 @@ int cpu_register_io_memory_simple(struct ReadWriteHandler *handler)
     }
     return cpu_register_io_memory(cpu_io_memory_simple_read,
                                   cpu_io_memory_simple_write,
-                                  handler);
+                                  handler, DEVICE_NATIVE_ENDIAN);
 }
 
 RWHANDLER_WRITE(ioport_simple_writeb, 1, uint32_t);
