diff --git a/arch/m68k/cpu/mcf523x/cpu.c b/arch/m68k/cpu/mcf523x/cpu.c
index 2376f97..a3f5684 100644
--- a/arch/m68k/cpu/mcf523x/cpu.c
+++ b/arch/m68k/cpu/mcf523x/cpu.c
@@ -3,7 +3,7 @@
  * (C) Copyright 2000-2003
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
- * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
  *
  * See file CREDITS for list of people who contributed to this
@@ -31,28 +31,29 @@
 #include <netdev.h>
 
 #include <asm/immap.h>
+#include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
-	volatile ccm_t *ccm = (ccm_t *) MMAP_CCM;
+	ccm_t *ccm = (ccm_t *) MMAP_CCM;
 
-	ccm->rcr = CCM_RCR_SOFTRST;
+	out_8(&ccm->rcr, CCM_RCR_SOFTRST);
 	/* we don't return! */
 	return 0;
-};
+}
 
 int checkcpu(void)
 {
-	volatile ccm_t *ccm = (ccm_t *) MMAP_CCM;
+	ccm_t *ccm = (ccm_t *) MMAP_CCM;
 	u16 msk;
 	u16 id = 0;
 	u8 ver;
 
 	puts("CPU:   ");
-	msk = (ccm->cir >> 6);
-	ver = (ccm->cir & 0x003f);
+	msk = (in_be16(&ccm->cir) >> 6);
+	ver = (in_be16(&ccm->cir) & 0x003f);
 	switch (msk) {
 	case 0x31:
 		id = 5235;
@@ -76,19 +77,21 @@
 /* Called by macro WATCHDOG_RESET */
 void watchdog_reset(void)
 {
-	volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
+	wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 
-	wdp->sr = 0x5555;	/* Count register */
+	/* Count register */
+	out_be16(&wdp->sr, 0x5555);
 	asm("nop");
-	wdp->sr = 0xAAAA;	/* Count register */
+	out_be16(&wdp->sr, 0xaaaa);
 }
 
 int watchdog_disable(void)
 {
-	volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
+	wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 
 	/* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
-	wdp->cr |= WTM_WCR_HALTED;	/* halted watchdog timer */
+	/* halted watchdog timer */
+	setbits_be16(&wdp->cr, WTM_WCR_HALTED);
 
 	puts("WATCHDOG:disabled\n");
 	return (0);
@@ -96,15 +99,15 @@
 
 int watchdog_init(void)
 {
-	volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
+	wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
 	u32 wdog_module = 0;
 
 	/* set timeout and enable watchdog */
 	wdog_module = ((CONFIG_SYS_CLK / CONFIG_SYS_HZ) * CONFIG_WATCHDOG_TIMEOUT);
 	wdog_module |= (wdog_module / 8192);
-	wdp->mr = wdog_module;
+	out_be16(&wdp->mr, wdog_module);
 
-	wdp->cr = WTM_WCR_EN;
+	out_be16(&wdp->cr, WTM_WCR_EN);
 	puts("WATCHDOG:enabled\n");
 
 	return (0);
diff --git a/arch/m68k/cpu/mcf523x/cpu_init.c b/arch/m68k/cpu/mcf523x/cpu_init.c
index 0f299f0..d1c0b40 100644
--- a/arch/m68k/cpu/mcf523x/cpu_init.c
+++ b/arch/m68k/cpu/mcf523x/cpu_init.c
@@ -3,7 +3,7 @@
  * (C) Copyright 2000-2003
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
- * (C) Copyright 2007 Freescale Semiconductor, Inc.
+ * (C) Copyright 2007, 2012 Freescale Semiconductor, Inc.
  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
  *
  * See file CREDITS for list of people who contributed to this
@@ -28,6 +28,7 @@
 #include <common.h>
 #include <watchdog.h>
 #include <asm/immap.h>
+#include <asm/io.h>
 
 #if defined(CONFIG_CMD_NET)
 #include <config.h>
@@ -44,74 +45,74 @@
  */
 void cpu_init_f(void)
 {
-	volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
-	volatile fbcs_t *fbcs = (fbcs_t *) MMAP_FBCS;
-	volatile wdog_t *wdog = (wdog_t *) MMAP_WDOG;
-	volatile scm_t *scm = (scm_t *) MMAP_SCM;
+	gpio_t *gpio = (gpio_t *) MMAP_GPIO;
+	fbcs_t *fbcs = (fbcs_t *) MMAP_FBCS;
+	wdog_t *wdog = (wdog_t *) MMAP_WDOG;
+	scm_t *scm = (scm_t *) MMAP_SCM;
 
 	/* watchdog is enabled by default - disable the watchdog */
 #ifndef CONFIG_WATCHDOG
-	wdog->cr = 0;
+	out_be16(&wdog->cr, 0);
 #endif
 
-	scm->rambar = (CONFIG_SYS_INIT_RAM_ADDR | SCM_RAMBAR_BDE);
+	out_be32(&scm->rambar, CONFIG_SYS_INIT_RAM_ADDR | SCM_RAMBAR_BDE);
 
 	/* Port configuration */
-	gpio->par_cs = 0;
+	out_8(&gpio->par_cs, 0);
 
 #if (defined(CONFIG_SYS_CS0_BASE) && defined(CONFIG_SYS_CS0_MASK) && defined(CONFIG_SYS_CS0_CTRL))
-	fbcs->csar0 = CONFIG_SYS_CS0_BASE;
-	fbcs->cscr0 = CONFIG_SYS_CS0_CTRL;
-	fbcs->csmr0 = CONFIG_SYS_CS0_MASK;
+	out_be32(&fbcs->csar0, CONFIG_SYS_CS0_BASE);
+	out_be32(&fbcs->cscr0, CONFIG_SYS_CS0_CTRL);
+	out_be32(&fbcs->csmr0, CONFIG_SYS_CS0_MASK);
 #endif
 
 #if (defined(CONFIG_SYS_CS1_BASE) && defined(CONFIG_SYS_CS1_MASK) && defined(CONFIG_SYS_CS1_CTRL))
-	gpio->par_cs |= GPIO_PAR_CS_CS1;
-	fbcs->csar1 = CONFIG_SYS_CS1_BASE;
-	fbcs->cscr1 = CONFIG_SYS_CS1_CTRL;
-	fbcs->csmr1 = CONFIG_SYS_CS1_MASK;
+	setbits_8(&gpio->par_cs, GPIO_PAR_CS_CS1);
+	out_be32(&fbcs->csar1, CONFIG_SYS_CS1_BASE);
+	out_be32(&fbcs->cscr1, CONFIG_SYS_CS1_CTRL);
+	out_be32(&fbcs->csmr1, CONFIG_SYS_CS1_MASK);
 #endif
 
 #if (defined(CONFIG_SYS_CS2_BASE) && defined(CONFIG_SYS_CS2_MASK) && defined(CONFIG_SYS_CS2_CTRL))
-	gpio->par_cs |= GPIO_PAR_CS_CS2;
-	fbcs->csar2 = CONFIG_SYS_CS2_BASE;
-	fbcs->cscr2 = CONFIG_SYS_CS2_CTRL;
-	fbcs->csmr2 = CONFIG_SYS_CS2_MASK;
+	setbits_8(&gpio->par_cs, GPIO_PAR_CS_CS2);
+	out_be32(&fbcs->csar2, CONFIG_SYS_CS2_BASE);
+	out_be32(&fbcs->cscr2, CONFIG_SYS_CS2_CTRL);
+	out_be32(&fbcs->csmr2, CONFIG_SYS_CS2_MASK);
 #endif
 
 #if (defined(CONFIG_SYS_CS3_BASE) && defined(CONFIG_SYS_CS3_MASK) && defined(CONFIG_SYS_CS3_CTRL))
-	gpio->par_cs |= GPIO_PAR_CS_CS3;
-	fbcs->csar3 = CONFIG_SYS_CS3_BASE;
-	fbcs->cscr3 = CONFIG_SYS_CS3_CTRL;
-	fbcs->csmr3 = CONFIG_SYS_CS3_MASK;
+	setbits_8(&gpio->par_cs, GPIO_PAR_CS_CS3);
+	out_be32(&fbcs->csar3, CONFIG_SYS_CS3_BASE);
+	out_be32(&fbcs->cscr3, CONFIG_SYS_CS3_CTRL);
+	out_be32(&fbcs->csmr3, CONFIG_SYS_CS3_MASK);
 #endif
 
 #if (defined(CONFIG_SYS_CS4_BASE) && defined(CONFIG_SYS_CS4_MASK) && defined(CONFIG_SYS_CS4_CTRL))
-	gpio->par_cs |= GPIO_PAR_CS_CS4;
-	fbcs->csar4 = CONFIG_SYS_CS4_BASE;
-	fbcs->cscr4 = CONFIG_SYS_CS4_CTRL;
-	fbcs->csmr4 = CONFIG_SYS_CS4_MASK;
+	setbits_8(&gpio->par_cs, GPIO_PAR_CS_CS4);
+	out_be32(&fbcs->csar4, CONFIG_SYS_CS4_BASE);
+	out_be32(&fbcs->cscr4, CONFIG_SYS_CS4_CTRL);
+	out_be32(&fbcs->csmr4, CONFIG_SYS_CS4_MASK);
 #endif
 
 #if (defined(CONFIG_SYS_CS5_BASE) && defined(CONFIG_SYS_CS5_MASK) && defined(CONFIG_SYS_CS5_CTRL))
-	gpio->par_cs |= GPIO_PAR_CS_CS5;
-	fbcs->csar5 = CONFIG_SYS_CS5_BASE;
-	fbcs->cscr5 = CONFIG_SYS_CS5_CTRL;
-	fbcs->csmr5 = CONFIG_SYS_CS5_MASK;
+	setbits_8(&gpio->par_cs, GPIO_PAR_CS_CS5);
+	out_be32(&fbcs->csar5, CONFIG_SYS_CS5_BASE);
+	out_be32(&fbcs->cscr5, CONFIG_SYS_CS5_CTRL);
+	out_be32(&fbcs->csmr5, CONFIG_SYS_CS5_MASK);
 #endif
 
 #if (defined(CONFIG_SYS_CS6_BASE) && defined(CONFIG_SYS_CS6_MASK) && defined(CONFIG_SYS_CS6_CTRL))
-	gpio->par_cs |= GPIO_PAR_CS_CS6;
-	fbcs->csar6 = CONFIG_SYS_CS6_BASE;
-	fbcs->cscr6 = CONFIG_SYS_CS6_CTRL;
-	fbcs->csmr6 = CONFIG_SYS_CS6_MASK;
+	setbits_8(&gpio->par_cs, GPIO_PAR_CS_CS6);
+	out_be32(&fbcs->csar6, CONFIG_SYS_CS6_BASE);
+	out_be32(&fbcs->cscr6, CONFIG_SYS_CS6_CTRL);
+	out_be32(&fbcs->csmr6, CONFIG_SYS_CS6_MASK);
 #endif
 
 #if (defined(CONFIG_SYS_CS7_BASE) && defined(CONFIG_SYS_CS7_MASK) && defined(CONFIG_SYS_CS7_CTRL))
-	gpio->par_cs |= GPIO_PAR_CS_CS7;
-	fbcs->csar7 = CONFIG_SYS_CS7_BASE;
-	fbcs->cscr7 = CONFIG_SYS_CS7_CTRL;
-	fbcs->csmr7 = CONFIG_SYS_CS7_MASK;
+	setbits_8(&gpio->par_cs, GPIO_PAR_CS_CS7);
+	out_be32(&fbcs->csar7, CONFIG_SYS_CS7_BASE);
+	out_be32(&fbcs->cscr7, CONFIG_SYS_CS7_CTRL);
+	out_be32(&fbcs->csmr7, CONFIG_SYS_CS7_MASK);
 #endif
 
 #ifdef CONFIG_FSL_I2C
@@ -132,29 +133,33 @@
 
 void uart_port_conf(int port)
 {
-	volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
+	gpio_t *gpio = (gpio_t *) MMAP_GPIO;
 
 	/* Setup Ports: */
 	switch (port) {
 	case 0:
-		gpio->par_uart &= ~(GPIO_PAR_UART_U0RXD | GPIO_PAR_UART_U0TXD);
-		gpio->par_uart |= (GPIO_PAR_UART_U0RXD | GPIO_PAR_UART_U0TXD);
+		clrbits_be16(&gpio->par_uart,
+			GPIO_PAR_UART_U0RXD | GPIO_PAR_UART_U0TXD);
+		setbits_be16(&gpio->par_uart,
+			GPIO_PAR_UART_U0RXD | GPIO_PAR_UART_U0TXD);
 		break;
 	case 1:
-		gpio->par_uart &=
-		    ~(GPIO_PAR_UART_U1RXD_MASK | GPIO_PAR_UART_U1TXD_MASK);
-		gpio->par_uart |=
-		    (GPIO_PAR_UART_U1RXD_U1RXD | GPIO_PAR_UART_U1TXD_U1TXD);
+		clrbits_be16(&gpio->par_uart,
+			GPIO_PAR_UART_U1RXD_MASK | GPIO_PAR_UART_U1TXD_MASK);
+		setbits_be16(&gpio->par_uart,
+			GPIO_PAR_UART_U1RXD_U1RXD | GPIO_PAR_UART_U1TXD_U1TXD);
 		break;
 	case 2:
 #ifdef CONFIG_SYS_UART2_PRI_GPIO
-		gpio->par_uart &= ~(GPIO_PAR_UART_U2RXD | GPIO_PAR_UART_U2TXD);
-		gpio->par_uart |= (GPIO_PAR_UART_U2RXD | GPIO_PAR_UART_U2TXD);
+		clrbits_be16(&gpio->par_uart,
+			GPIO_PAR_UART_U2RXD | GPIO_PAR_UART_U2TXD);
+		setbits_be16(&gpio->par_uart,
+			GPIO_PAR_UART_U2RXD | GPIO_PAR_UART_U2TXD);
 #elif defined(CONFIG_SYS_UART2_ALT1_GPIO)
-		gpio->feci2c &=
-		    ~(GPIO_PAR_FECI2C_EMDC_MASK | GPIO_PAR_FECI2C_EMDIO_MASK);
-		gpio->feci2c |=
-		    (GPIO_PAR_FECI2C_EMDC_U2TXD | GPIO_PAR_FECI2C_EMDIO_U2RXD);
+		clrbits_8(&gpio->par_feci2c,
+			GPIO_PAR_FECI2C_EMDC_MASK | GPIO_PAR_FECI2C_EMDIO_MASK);
+		setbits_8(&gpio->par_feci2c,
+			GPIO_PAR_FECI2C_EMDC_U2TXD | GPIO_PAR_FECI2C_EMDIO_U2RXD);
 #endif
 		break;
 	}
@@ -163,15 +168,16 @@
 #if defined(CONFIG_CMD_NET)
 int fecpin_setclear(struct eth_device *dev, int setclear)
 {
-	volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
+	gpio_t *gpio = (gpio_t *) MMAP_GPIO;
 
 	if (setclear) {
-		gpio->par_feci2c |=
-		    (GPIO_PAR_FECI2C_EMDC_FECEMDC |
-		     GPIO_PAR_FECI2C_EMDIO_FECEMDIO);
+		setbits_8(&gpio->par_feci2c,
+			GPIO_PAR_FECI2C_EMDC_FECEMDC |
+			GPIO_PAR_FECI2C_EMDIO_FECEMDIO);
 	} else {
-		gpio->par_feci2c &=
-		    ~(GPIO_PAR_FECI2C_EMDC_MASK | GPIO_PAR_FECI2C_EMDIO_MASK);
+		clrbits_8(&gpio->par_feci2c,
+			GPIO_PAR_FECI2C_EMDC_MASK |
+			GPIO_PAR_FECI2C_EMDIO_MASK);
 	}
 
 	return 0;
diff --git a/arch/m68k/cpu/mcf523x/interrupts.c b/arch/m68k/cpu/mcf523x/interrupts.c
index db5ccdf..76115a4 100644
--- a/arch/m68k/cpu/mcf523x/interrupts.c
+++ b/arch/m68k/cpu/mcf523x/interrupts.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
  *
  * See file CREDITS for list of people who contributed to this
@@ -25,13 +25,14 @@
 /* CPU specific interrupt routine */
 #include <common.h>
 #include <asm/immap.h>
+#include <asm/io.h>
 
 int interrupt_init(void)
 {
-	volatile int0_t *intp = (int0_t *) (CONFIG_SYS_INTR_BASE);
+	int0_t *intp = (int0_t *) (CONFIG_SYS_INTR_BASE);
 
 	/* Make sure all interrupts are disabled */
-	intp->imrl0 |= 0x1;
+	setbits_be32(&intp->imrl0, 0x1);
 
 	enable_interrupts();
 	return 0;
@@ -40,10 +41,10 @@
 #if defined(CONFIG_MCFTMR)
 void dtimer_intr_setup(void)
 {
-	volatile int0_t *intp = (int0_t *) (CONFIG_SYS_INTR_BASE);
+	int0_t *intp = (int0_t *) (CONFIG_SYS_INTR_BASE);
 
-	intp->icr0[CONFIG_SYS_TMRINTR_NO] = CONFIG_SYS_TMRINTR_PRI;
-	intp->imrl0 &= ~INTC_IPRL_INT0;
-	intp->imrl0 &= ~CONFIG_SYS_TMRINTR_MASK;
+	out_8(&intp->icr0[CONFIG_SYS_TMRINTR_NO], CONFIG_SYS_TMRINTR_PRI);
+	clrbits_be32(&intp->imrl0, INTC_IPRL_INT0);
+	clrbits_be32(&intp->imrl0, CONFIG_SYS_TMRINTR_MASK);
 }
 #endif
diff --git a/arch/m68k/cpu/mcf523x/speed.c b/arch/m68k/cpu/mcf523x/speed.c
index 6096ba4..e2a6ae3 100644
--- a/arch/m68k/cpu/mcf523x/speed.c
+++ b/arch/m68k/cpu/mcf523x/speed.c
@@ -3,7 +3,7 @@
  * (C) Copyright 2000-2003
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
- * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
  *
  * See file CREDITS for list of people who contributed to this
@@ -29,6 +29,7 @@
 #include <asm/processor.h>
 
 #include <asm/immap.h>
+#include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 /*
@@ -36,11 +37,12 @@
  */
 int get_clocks(void)
 {
-	volatile pll_t *pll = (volatile pll_t *)(MMAP_PLL);
+	pll_t *pll = (pll_t *)(MMAP_PLL);
 
-	pll->syncr = PLL_SYNCR_MFD(1);
+	out_be32(&pll->syncr, PLL_SYNCR_MFD(1));
 
-	while (!(pll->synsr & PLL_SYNSR_LOCK));
+	while (!(in_be32(&pll->synsr) & PLL_SYNSR_LOCK))
+		;
 
 	gd->bus_clk = CONFIG_SYS_CLK;
 	gd->cpu_clk = (gd->bus_clk * 2);