diff --git a/hw/mips_jazz.c b/hw/mips_jazz.c
index 1abab70..8287ca4 100644
--- a/hw/mips_jazz.c
+++ b/hw/mips_jazz.c
@@ -252,18 +252,12 @@ static void mips_jazz_init(MemoryRegion *address_space,
 
     /* Serial ports */
     if (serial_hds[0]) {
-#ifdef TARGET_WORDS_BIGENDIAN
-        serial_mm_init(0x80006000, 0, rc4030[8], 8000000/16, serial_hds[0], 1, 1);
-#else
-        serial_mm_init(0x80006000, 0, rc4030[8], 8000000/16, serial_hds[0], 1, 0);
-#endif
+        serial_mm_init(0x80006000, 0, rc4030[8], 8000000/16, serial_hds[0],
+                       1, DEVICE_NATIVE_ENDIAN);
     }
     if (serial_hds[1]) {
-#ifdef TARGET_WORDS_BIGENDIAN
-        serial_mm_init(0x80007000, 0, rc4030[9], 8000000/16, serial_hds[1], 1, 1);
-#else
-        serial_mm_init(0x80007000, 0, rc4030[9], 8000000/16, serial_hds[1], 1, 0);
-#endif
+        serial_mm_init(0x80007000, 0, rc4030[9], 8000000/16, serial_hds[1],
+                       1, DEVICE_NATIVE_ENDIAN);
     }
 
     /* Parallel port */
diff --git a/hw/mips_malta.c b/hw/mips_malta.c
index dd84992..2851f8c 100644
--- a/hw/mips_malta.c
+++ b/hw/mips_malta.c
@@ -446,11 +446,8 @@ static MaltaFPGAState *malta_fpga_init(MemoryRegion *address_space,
 
     s->display = qemu_chr_open("fpga", "vc:320x200", malta_fpga_led_init);
 
-#ifdef TARGET_WORDS_BIGENDIAN
-    s->uart = serial_mm_init(base + 0x900, 3, uart_irq, 230400, uart_chr, 1, 1);
-#else
-    s->uart = serial_mm_init(base + 0x900, 3, uart_irq, 230400, uart_chr, 1, 0);
-#endif
+    s->uart = serial_mm_init(base + 0x900, 3, uart_irq, 230400, uart_chr,
+                             1, DEVICE_NATIVE_ENDIAN);
 
     malta_fpga_reset(s);
     qemu_register_reset(malta_fpga_reset, s);
diff --git a/hw/musicpal.c b/hw/musicpal.c
index 627e0c1..d33e880 100644
--- a/hw/musicpal.c
+++ b/hw/musicpal.c
@@ -1488,22 +1488,12 @@ static void musicpal_init(MemoryRegion *address_space_mem,
                           pic[MP_TIMER4_IRQ], NULL);
 
     if (serial_hds[0]) {
-#ifdef TARGET_WORDS_BIGENDIAN
-        serial_mm_init(MP_UART1_BASE, 2, pic[MP_UART1_IRQ], 1825000,
-                       serial_hds[0], 1, 1);
-#else
         serial_mm_init(MP_UART1_BASE, 2, pic[MP_UART1_IRQ], 1825000,
-                       serial_hds[0], 1, 0);
-#endif
+                       serial_hds[0], 1, DEVICE_NATIVE_ENDIAN);
     }
     if (serial_hds[1]) {
-#ifdef TARGET_WORDS_BIGENDIAN
-        serial_mm_init(MP_UART2_BASE, 2, pic[MP_UART2_IRQ], 1825000,
-                       serial_hds[1], 1, 1);
-#else
         serial_mm_init(MP_UART2_BASE, 2, pic[MP_UART2_IRQ], 1825000,
-                       serial_hds[1], 1, 0);
-#endif
+                       serial_hds[1], 1, DEVICE_NATIVE_ENDIAN);
     }
 
     /* Register flash */
diff --git a/hw/omap_uart.c b/hw/omap_uart.c
index 9cee81d..64b2085 100644
--- a/hw/omap_uart.c
+++ b/hw/omap_uart.c
@@ -60,15 +60,9 @@ struct omap_uart_s *omap_uart_init(target_phys_addr_t base,
     s->base = base;
     s->fclk = fclk;
     s->irq = irq;
-#ifdef TARGET_WORDS_BIGENDIAN
     s->serial = serial_mm_init(base, 2, irq, omap_clk_getrate(fclk)/16,
                                chr ?: qemu_chr_open(label, "null", NULL), 1,
-                               1);
-#else
-    s->serial = serial_mm_init(base, 2, irq, omap_clk_getrate(fclk)/16,
-                               chr ?: qemu_chr_open(label, "null", NULL), 1,
-                               0);
-#endif
+                               DEVICE_NATIVE_ENDIAN);
     return s;
 }
 
@@ -182,15 +176,8 @@ struct omap_uart_s *omap2_uart_init(struct omap_target_agent_s *ta,
 void omap_uart_attach(struct omap_uart_s *s, CharDriverState *chr)
 {
     /* TODO: Should reuse or destroy current s->serial */
-#ifdef TARGET_WORDS_BIGENDIAN
-    s->serial = serial_mm_init(s->base, 2, s->irq,
-                               omap_clk_getrate(s->fclk) / 16,
-                               chr ?: qemu_chr_open("null", "null", NULL), 1,
-                               1);
-#else
     s->serial = serial_mm_init(s->base, 2, s->irq,
                                omap_clk_getrate(s->fclk) / 16,
                                chr ?: qemu_chr_open("null", "null", NULL), 1,
-                               0);
-#endif
+                               DEVICE_NATIVE_ENDIAN);
 }
diff --git a/hw/pc.h b/hw/pc.h
index 28ed210..b7323fc 100644
--- a/hw/pc.h
+++ b/hw/pc.h
@@ -18,7 +18,7 @@ SerialState *serial_init(int base, qemu_irq irq, int baudbase,
 SerialState *serial_mm_init (target_phys_addr_t base, int it_shift,
                              qemu_irq irq, int baudbase,
                              CharDriverState *chr, int ioregister,
-                             int be);
+                             enum device_endian);
 static inline bool serial_isa_init(int index, CharDriverState *chr)
 {
     ISADevice *dev;
diff --git a/hw/petalogix_ml605_mmu.c b/hw/petalogix_ml605_mmu.c
index 2108193..2ae5c43 100644
--- a/hw/petalogix_ml605_mmu.c
+++ b/hw/petalogix_ml605_mmu.c
@@ -189,7 +189,7 @@ petalogix_ml605_init(MemoryRegion *address_space_mem,
     }
 
     serial_mm_init(UART16550_BASEADDR + 0x1000, 2, irq[5], 115200,
-                   serial_hds[0], 1, 0);
+                   serial_hds[0], 1, DEVICE_LITTLE_ENDIAN);
 
     /* 2 timers at irq 2 @ 100 Mhz.  */
     xilinx_timer_create(TIMER_BASEADDR, irq[2], 2, 100 * 1000000);
diff --git a/hw/ppc405_uc.c b/hw/ppc405_uc.c
index efdf37d..fb36c07 100644
--- a/hw/ppc405_uc.c
+++ b/hw/ppc405_uc.c
@@ -2150,11 +2150,11 @@ CPUState *ppc405cr_init (MemoryRegion ram_memories[4],
     /* Serial ports */
     if (serial_hds[0] != NULL) {
         serial_mm_init(0xef600300, 0, pic[0], PPC_SERIAL_MM_BAUDBASE,
-                       serial_hds[0], 1, 1);
+                       serial_hds[0], 1, DEVICE_BIG_ENDIAN);
     }
     if (serial_hds[1] != NULL) {
         serial_mm_init(0xef600400, 0, pic[1], PPC_SERIAL_MM_BAUDBASE,
-                       serial_hds[1], 1, 1);
+                       serial_hds[1], 1, DEVICE_BIG_ENDIAN);
     }
     /* IIC controller */
     ppc405_i2c_init(0xef600500, pic[2]);
@@ -2505,11 +2505,11 @@ CPUState *ppc405ep_init (MemoryRegion ram_memories[2],
     /* Serial ports */
     if (serial_hds[0] != NULL) {
         serial_mm_init(0xef600300, 0, pic[0], PPC_SERIAL_MM_BAUDBASE,
-                       serial_hds[0], 1, 1);
+                       serial_hds[0], 1, DEVICE_BIG_ENDIAN);
     }
     if (serial_hds[1] != NULL) {
         serial_mm_init(0xef600400, 0, pic[1], PPC_SERIAL_MM_BAUDBASE,
-                       serial_hds[1], 1, 1);
+                       serial_hds[1], 1, DEVICE_BIG_ENDIAN);
     }
     /* OCM */
     ppc405_ocm_init(env);
diff --git a/hw/ppc440.c b/hw/ppc440.c
index f34d68d..b5391d4 100644
--- a/hw/ppc440.c
+++ b/hw/ppc440.c
@@ -93,11 +93,11 @@ CPUState *ppc440ep_init(ram_addr_t *ram_size, PCIBus **pcip,
 
     if (serial_hds[0] != NULL) {
         serial_mm_init(0xef600300, 0, pic[0], PPC_SERIAL_MM_BAUDBASE,
-                       serial_hds[0], 1, 1);
+                       serial_hds[0], 1, DEVICE_BIG_ENDIAN);
     }
     if (serial_hds[1] != NULL) {
         serial_mm_init(0xef600400, 0, pic[1], PPC_SERIAL_MM_BAUDBASE,
-                       serial_hds[1], 1, 1);
+                       serial_hds[1], 1, DEVICE_BIG_ENDIAN);
     }
 
     return env;
diff --git a/hw/ppce500_mpc8544ds.c b/hw/ppce500_mpc8544ds.c
index 43e0bd9..ae72612 100644
--- a/hw/ppce500_mpc8544ds.c
+++ b/hw/ppce500_mpc8544ds.c
@@ -278,13 +278,13 @@ static void mpc8544ds_init(MemoryRegion *address_space_mem,
     if (serial_hds[0]) {
         serial_mm_init(MPC8544_SERIAL0_REGS_BASE,
                        0, mpic[12+26], 399193,
-                       serial_hds[0], 1, 1);
+                       serial_hds[0], 1, DEVICE_BIG_ENDIAN);
     }
 
     if (serial_hds[1]) {
         serial_mm_init(MPC8544_SERIAL1_REGS_BASE,
                        0, mpic[12+26], 399193,
-                       serial_hds[0], 1, 1);
+                       serial_hds[0], 1, DEVICE_BIG_ENDIAN);
     }
 
     /* General Utility device */
diff --git a/hw/pxa2xx.c b/hw/pxa2xx.c
index cf93110..a30e714 100644
--- a/hw/pxa2xx.c
+++ b/hw/pxa2xx.c
@@ -2113,19 +2113,16 @@ PXA2xxState *pxa270_init(unsigned int sdram_size, const char *revision)
                     qdev_get_gpio_in(s->dma, PXA2XX_RX_RQ_MMCI),
                     qdev_get_gpio_in(s->dma, PXA2XX_TX_RQ_MMCI));
 
-    for (i = 0; pxa270_serial[i].io_base; i ++)
-        if (serial_hds[i])
-#ifdef TARGET_WORDS_BIGENDIAN
-            serial_mm_init(pxa270_serial[i].io_base, 2,
-                            qdev_get_gpio_in(s->pic, pxa270_serial[i].irqn),
-                            14857000 / 16, serial_hds[i], 1, 1);
-#else
+    for (i = 0; pxa270_serial[i].io_base; i++) {
+        if (serial_hds[i]) {
             serial_mm_init(pxa270_serial[i].io_base, 2,
-                            qdev_get_gpio_in(s->pic, pxa270_serial[i].irqn),
-                            14857000 / 16, serial_hds[i], 1, 0);
-#endif
-        else
+                           qdev_get_gpio_in(s->pic, pxa270_serial[i].irqn),
+                           14857000 / 16, serial_hds[i], 1,
+                           DEVICE_NATIVE_ENDIAN);
+        } else {
             break;
+        }
+    }
     if (serial_hds[i])
         s->fir = pxa2xx_fir_init(0x40800000,
                         qdev_get_gpio_in(s->pic, PXA2XX_PIC_ICP),
@@ -2248,20 +2245,16 @@ PXA2xxState *pxa255_init(unsigned int sdram_size)
                     qdev_get_gpio_in(s->dma, PXA2XX_RX_RQ_MMCI),
                     qdev_get_gpio_in(s->dma, PXA2XX_TX_RQ_MMCI));
 
-    for (i = 0; pxa255_serial[i].io_base; i ++)
+    for (i = 0; pxa255_serial[i].io_base; i++) {
         if (serial_hds[i]) {
-#ifdef TARGET_WORDS_BIGENDIAN
-            serial_mm_init(pxa255_serial[i].io_base, 2,
-                            qdev_get_gpio_in(s->pic, pxa255_serial[i].irqn),
-                            14745600 / 16, serial_hds[i], 1, 1);
-#else
             serial_mm_init(pxa255_serial[i].io_base, 2,
-                            qdev_get_gpio_in(s->pic, pxa255_serial[i].irqn),
-                            14745600 / 16, serial_hds[i], 1, 0);
-#endif
+                           qdev_get_gpio_in(s->pic, pxa255_serial[i].irqn),
+                           14745600 / 16, serial_hds[i], 1,
+                           DEVICE_NATIVE_ENDIAN);
         } else {
             break;
         }
+    }
     if (serial_hds[i])
         s->fir = pxa2xx_fir_init(0x40800000,
                         qdev_get_gpio_in(s->pic, PXA2XX_PIC_ICP),
diff --git a/hw/serial.c b/hw/serial.c
index 1fb9e9c..2954a48 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -858,10 +858,9 @@ static const MemoryRegionOps serial_mm_ops[3] = {
 SerialState *serial_mm_init (target_phys_addr_t base, int it_shift,
                              qemu_irq irq, int baudbase,
                              CharDriverState *chr, int ioregister,
-                             int be)
+                             enum device_endian end)
 {
     SerialState *s;
-    enum device_endian end;
 
     s = qemu_mallocz(sizeof(SerialState));
 
@@ -873,7 +872,6 @@ SerialState *serial_mm_init (target_phys_addr_t base, int it_shift,
     serial_init_core(s);
     vmstate_register(NULL, base, &vmstate_serial, s);
 
-    end = (be ? DEVICE_BIG_ENDIAN : DEVICE_LITTLE_ENDIAN);
     memory_region_init_io(&s->io, &serial_mm_ops[end], s,
                           "serial", 8 << it_shift);
     if (ioregister) {
diff --git a/hw/sm501.c b/hw/sm501.c
index 0f0bf96..de57186 100644
--- a/hw/sm501.c
+++ b/hw/sm501.c
@@ -1440,15 +1440,9 @@ void sm501_init(uint32_t base, uint32_t local_mem_bytes, qemu_irq irq,
 
     /* bridge to serial emulation module */
     if (chr) {
-#ifdef TARGET_WORDS_BIGENDIAN
         serial_mm_init(base + MMIO_BASE_OFFSET + SM501_UART0, 2,
                        NULL, /* TODO : chain irq to IRL */
-                       115200, chr, 1, 1);
-#else
-        serial_mm_init(base + MMIO_BASE_OFFSET + SM501_UART0, 2,
-                       NULL, /* TODO : chain irq to IRL */
-                       115200, chr, 1, 0);
-#endif
+                       115200, chr, 1, DEVICE_NATIVE_ENDIAN);
     }
 
     /* create qemu graphic console */
diff --git a/hw/sun4u.c b/hw/sun4u.c
index b6421cb..d9096fc 100644
--- a/hw/sun4u.c
+++ b/hw/sun4u.c
@@ -768,7 +768,7 @@ static void sun4uv_init(ram_addr_t RAM_size,
     i = 0;
     if (hwdef->console_serial_base) {
         serial_mm_init(hwdef->console_serial_base, 0, NULL, 115200,
-                       serial_hds[i], 1, 1);
+                       serial_hds[i], 1, DEVICE_BIG_ENDIAN);
         i++;
     }
     for(; i < MAX_SERIAL_PORTS; i++) {
diff --git a/hw/virtex_ml507.c b/hw/virtex_ml507.c
index 15d37b5..d9a2758 100644
--- a/hw/virtex_ml507.c
+++ b/hw/virtex_ml507.c
@@ -232,7 +232,8 @@ static void virtex_init(MemoryRegion *address_space_mem,
         irq[i] = qdev_get_gpio_in(dev, i);
     }
 
-    serial_mm_init(0x83e01003ULL, 2, irq[9], 115200, serial_hds[0], 1, 0);
+    serial_mm_init(0x83e01003ULL, 2, irq[9], 115200, serial_hds[0],
+                   1, DEVICE_LITTLE_ENDIAN);
 
     /* 2 timers at irq 2 @ 62 Mhz.  */
     xilinx_timer_create(0x83c00000, irq[3], 2, 62 * 1000000);
