ARM: pxa: Access SMEMC via virtual addresses

This is important because on PXA3xx, the physical mapping of SMEMC registers
differs from the one on PXA2xx. In order to get PCMCIA working on both PXA2xx
and PXA320, the PCMCIA driver was adjusted accordingly as well.

Also, various places in the kernel had to be patched to use
__raw_read/__raw_write.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

21 files changed, 156 insertions, 128 deletions

diff --git a/arch/arm/mach-pxa/cm-x2xx.c b/arch/arm/mach-pxa/cm-x2xx.c
index 47e242005fa..b734d846816 100644
--- a/arch/arm/mach-pxa/cm-x2xx.c
+++ b/arch/arm/mach-pxa/cm-x2xx.c
@@ -24,6 +24,7 @@
 #include <mach/pxa2xx-regs.h>
 #include <mach/audio.h>
 #include <mach/pxafb.h>
+#include <mach/smemc.h>
 
 #include <asm/hardware/it8152.h>
 
@@ -392,9 +393,9 @@ static int cmx2xx_suspend(struct sys_device *dev, pm_message_t state)
         cmx2xx_pci_suspend();
 
         /* save MSC registers */
-        sleep_save_msc[0] = MSC0;
-        sleep_save_msc[1] = MSC1;
-        sleep_save_msc[2] = MSC2;
+        sleep_save_msc[0] = __raw_readl(MSC0);
+        sleep_save_msc[1] = __raw_readl(MSC1);
+        sleep_save_msc[2] = __raw_readl(MSC2);
 
         /* setup power saving mode registers */
         PCFR = 0x0;
@@ -416,9 +417,9 @@ static int cmx2xx_resume(struct sys_device *dev)
         cmx2xx_pci_resume();
 
         /* restore MSC registers */
-        MSC0 = sleep_save_msc[0];
-        MSC1 = sleep_save_msc[1];
-        MSC2 = sleep_save_msc[2];
+        __raw_writel(sleep_save_msc[0], MSC0);
+        __raw_writel(sleep_save_msc[1], MSC1);
+        __raw_writel(sleep_save_msc[2], MSC2);
 
         return 0;
 }
diff --git a/arch/arm/mach-pxa/cpufreq-pxa2xx.c b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
index 58093d9e07b..6a7aeab42f6 100644
--- a/arch/arm/mach-pxa/cpufreq-pxa2xx.c
+++ b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
@@ -38,8 +38,10 @@
 #include <linux/cpufreq.h>
 #include <linux/err.h>
 #include <linux/regulator/consumer.h>
+#include <linux/io.h>
 
 #include <mach/pxa2xx-regs.h>
+#include <mach/smemc.h>
 
 #ifdef DEBUG
 static unsigned int freq_debug;
@@ -242,7 +244,7 @@ static void pxa27x_guess_max_freq(void)
 
 static void init_sdram_rows(void)
 {
-        uint32_t mdcnfg = MDCNFG;
+        uint32_t mdcnfg = __raw_readl(MDCNFG);
         unsigned int drac2 = 0, drac0 = 0;
 
         if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
@@ -331,8 +333,8 @@ static int pxa_set_target(struct cpufreq_policy *policy,
          * we need to preset the smaller DRI before the change.  If we're
          * speeding up we need to set the larger DRI value after the change.
          */
-        preset_mdrefr = postset_mdrefr = MDREFR;
-        if ((MDREFR & MDREFR_DRI_MASK) > mdrefr_dri(new_freq_mem)) {
+        preset_mdrefr = postset_mdrefr = __raw_readl(MDREFR);
+        if ((preset_mdrefr & MDREFR_DRI_MASK) > mdrefr_dri(new_freq_mem)) {
                 preset_mdrefr = (preset_mdrefr & ~MDREFR_DRI_MASK);
                 preset_mdrefr |= mdrefr_dri(new_freq_mem);
         }
@@ -370,7 +372,7 @@ static int pxa_set_target(struct cpufreq_policy *policy,
 3:              nop                                                     \n\
           "
                      : "=&r" (unused)
-                     : "r" (&MDREFR), "r" (cclkcfg),
+                     : "r" (MDREFR), "r" (cclkcfg),
                        "r" (preset_mdrefr), "r" (postset_mdrefr)
                      : "r4", "r5");
         local_irq_restore(flags);
diff --git a/arch/arm/mach-pxa/csb726.c b/arch/arm/mach-pxa/csb726.c
index 225a2a11781..a305424a967 100644
--- a/arch/arm/mach-pxa/csb726.c
+++ b/arch/arm/mach-pxa/csb726.c
@@ -27,6 +27,7 @@
 #include <mach/ohci.h>
 #include <mach/pxa2xx-regs.h>
 #include <mach/audio.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -255,9 +256,9 @@ static struct platform_device *devices[] __initdata = {
 static void __init csb726_init(void)
 {
         pxa2xx_mfp_config(ARRAY_AND_SIZE(csb726_pin_config));
-/*      MSC1 = 0x7ffc3ffc; *//* LAN9215/EXP_CS */
-/*      MSC2 = 0x06697ff4; *//* none/SM501 */
-        MSC2 = (MSC2 & ~0xffff) | 0x7ff4; /* SM501 */
+/*      __raw_writel(0x7ffc3ffc, MSC1); *//* LAN9215/EXP_CS */
+/*      __raw_writel(0x06697ff4, MSC2); *//* none/SM501 */
+        __raw_writel((__raw_readl(MSC2) & ~0xffff) | 0x7ff4, MSC2); /* SM501 */
 
         pxa_set_ffuart_info(NULL);
         pxa_set_btuart_info(NULL);
diff --git a/arch/arm/mach-pxa/generic.c b/arch/arm/mach-pxa/generic.c
index 6a5f3793537..d4ce8f9233d 100644
--- a/arch/arm/mach-pxa/generic.c
+++ b/arch/arm/mach-pxa/generic.c
@@ -28,6 +28,7 @@
 
 #include <mach/reset.h>
 #include <mach/gpio.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 
diff --git a/arch/arm/mach-pxa/h5000.c b/arch/arm/mach-pxa/h5000.c
index 0ef16351bf9..657db469de1 100644
--- a/arch/arm/mach-pxa/h5000.c
+++ b/arch/arm/mach-pxa/h5000.c
@@ -32,6 +32,7 @@
 #include <mach/pxa25x.h>
 #include <mach/h5000.h>
 #include <mach/udc.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 
@@ -172,11 +173,11 @@ static unsigned long h5000_pin_config[] __initdata = {
 
 static void fix_msc(void)
 {
-        MSC0 = 0x129c24f2;
-        MSC1 = 0x7ff424fa;
-        MSC2 = 0x7ff47ff4;
+        __raw_writel(0x129c24f2, MSC0);
+        __raw_writel(0x7ff424fa, MSC1);
+        __raw_writel(0x7ff47ff4, MSC2);
 
-        MDREFR |= 0x02080000;
+        __raw_writel(__raw_readl(MDREFR) | 0x02080000, MDREFR);
 }
 
 /*
diff --git a/arch/arm/mach-pxa/include/mach/pxa2xx-regs.h b/arch/arm/mach-pxa/include/mach/pxa2xx-regs.h
index dd0fc1c95cc..ee6ced1cea7 100644
--- a/arch/arm/mach-pxa/include/mach/pxa2xx-regs.h
+++ b/arch/arm/mach-pxa/include/mach/pxa2xx-regs.h
@@ -17,61 +17,6 @@
 #include <mach/hardware.h>
 
 /*
- * Memory controller
- */
-
-#define MDCNFG          __REG(0x48000000)  /* SDRAM Configuration Register 0 */
-#define MDREFR          __REG(0x48000004)  /* SDRAM Refresh Control Register */
-#define MSC0            __REG(0x48000008)  /* Static Memory Control Register 0 */
-#define MSC1            __REG(0x4800000C)  /* Static Memory Control Register 1 */
-#define MSC2            __REG(0x48000010)  /* Static Memory Control Register 2 */
-#define MECR            __REG(0x48000014)  /* Expansion Memory (PCMCIA/Compact Flash) Bus Configuration */
-#define SXLCR           __REG(0x48000018)  /* LCR value to be written to SDRAM-Timing Synchronous Flash */
-#define SXCNFG          __REG(0x4800001C)  /* Synchronous Static Memory Control Register */
-#define SXMRS           __REG(0x48000024)  /* MRS value to be written to Synchronous Flash or SMROM */
-#define MCMEM0          __REG(0x48000028)  /* Card interface Common Memory Space Socket 0 Timing */
-#define MCMEM1          __REG(0x4800002C)  /* Card interface Common Memory Space Socket 1 Timing */
-#define MCATT0          __REG(0x48000030)  /* Card interface Attribute Space Socket 0 Timing Configuration */
-#define MCATT1          __REG(0x48000034)  /* Card interface Attribute Space Socket 1 Timing Configuration */
-#define MCIO0           __REG(0x48000038)  /* Card interface I/O Space Socket 0 Timing Configuration */
-#define MCIO1           __REG(0x4800003C)  /* Card interface I/O Space Socket 1 Timing Configuration */
-#define MDMRS           __REG(0x48000040)  /* MRS value to be written to SDRAM */
-#define BOOT_DEF        __REG(0x48000044)  /* Read-Only Boot-Time Register. Contains BOOT_SEL and PKG_SEL */
-
-/*
- * More handy macros for PCMCIA
- *
- * Arg is socket number
- */
-#define MCMEM(s)        __REG2(0x48000028, (s)<<2 )  /* Card interface Common Memory Space Socket s Timing */
-#define MCATT(s)        __REG2(0x48000030, (s)<<2 )  /* Card interface Attribute Space Socket s Timing Configuration */
-#define MCIO(s)         __REG2(0x48000038, (s)<<2 )  /* Card interface I/O Space Socket s Timing Configuration */
-
-/* MECR register defines */
-#define MECR_NOS        (1 << 0)        /* Number Of Sockets: 0 -> 1 sock, 1 -> 2 sock */
-#define MECR_CIT        (1 << 1)        /* Card Is There: 0 -> no card, 1 -> card inserted */
-
-#define MDCNFG_DE0      (1 << 0)        /* SDRAM Bank 0 Enable */
-#define MDCNFG_DE1      (1 << 1)        /* SDRAM Bank 1 Enable */
-#define MDCNFG_DE2      (1 << 16)       /* SDRAM Bank 2 Enable */
-#define MDCNFG_DE3      (1 << 17)       /* SDRAM Bank 3 Enable */
-
-#define MDREFR_K0DB4    (1 << 29)       /* SDCLK0 Divide by 4 Control/Status */
-#define MDREFR_K2FREE   (1 << 25)       /* SDRAM Free-Running Control */
-#define MDREFR_K1FREE   (1 << 24)       /* SDRAM Free-Running Control */
-#define MDREFR_K0FREE   (1 << 23)       /* SDRAM Free-Running Control */
-#define MDREFR_SLFRSH   (1 << 22)       /* SDRAM Self-Refresh Control/Status */
-#define MDREFR_APD      (1 << 20)       /* SDRAM/SSRAM Auto-Power-Down Enable */
-#define MDREFR_K2DB2    (1 << 19)       /* SDCLK2 Divide by 2 Control/Status */
-#define MDREFR_K2RUN    (1 << 18)       /* SDCLK2 Run Control/Status */
-#define MDREFR_K1DB2    (1 << 17)       /* SDCLK1 Divide by 2 Control/Status */
-#define MDREFR_K1RUN    (1 << 16)       /* SDCLK1 Run Control/Status */
-#define MDREFR_E1PIN    (1 << 15)       /* SDCKE1 Level Control/Status */
-#define MDREFR_K0DB2    (1 << 14)       /* SDCLK0 Divide by 2 Control/Status */
-#define MDREFR_K0RUN    (1 << 13)       /* SDCLK0 Run Control/Status */
-#define MDREFR_E0PIN    (1 << 12)       /* SDCKE0 Level Control/Status */
-
-/*
  * Power Manager
  */
 
diff --git a/arch/arm/mach-pxa/include/mach/smemc.h b/arch/arm/mach-pxa/include/mach/smemc.h
new file mode 100644
index 00000000000..654adc90c9a
--- /dev/null
+++ b/arch/arm/mach-pxa/include/mach/smemc.h
@@ -0,0 +1,74 @@
+/*
+ * Static memory controller register definitions for PXA CPUs
+ *
+ * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __SMEMC_REGS_H
+#define __SMEMC_REGS_H
+
+#define PXA2XX_SMEMC_BASE       0x48000000
+#define PXA3XX_SMEMC_BASE       0x4a000000
+#define SMEMC_VIRT              0xf6000000
+
+#define MDCNFG          (SMEMC_VIRT + 0x00)  /* SDRAM Configuration Register 0 */
+#define MDREFR          (SMEMC_VIRT + 0x04)  /* SDRAM Refresh Control Register */
+#define MSC0            (SMEMC_VIRT + 0x08)  /* Static Memory Control Register 0 */
+#define MSC1            (SMEMC_VIRT + 0x0C)  /* Static Memory Control Register 1 */
+#define MSC2            (SMEMC_VIRT + 0x10)  /* Static Memory Control Register 2 */
+#define MECR            (SMEMC_VIRT + 0x14)  /* Expansion Memory (PCMCIA/Compact Flash) Bus Configuration */
+#define SXLCR           (SMEMC_VIRT + 0x18)  /* LCR value to be written to SDRAM-Timing Synchronous Flash */
+#define SXCNFG          (SMEMC_VIRT + 0x1C)  /* Synchronous Static Memory Control Register */
+#define SXMRS           (SMEMC_VIRT + 0x24)  /* MRS value to be written to Synchronous Flash or SMROM */
+#define MCMEM0          (SMEMC_VIRT + 0x28)  /* Card interface Common Memory Space Socket 0 Timing */
+#define MCMEM1          (SMEMC_VIRT + 0x2C)  /* Card interface Common Memory Space Socket 1 Timing */
+#define MCATT0          (SMEMC_VIRT + 0x30)  /* Card interface Attribute Space Socket 0 Timing Configuration */
+#define MCATT1          (SMEMC_VIRT + 0x34)  /* Card interface Attribute Space Socket 1 Timing Configuration */
+#define MCIO0           (SMEMC_VIRT + 0x38)  /* Card interface I/O Space Socket 0 Timing Configuration */
+#define MCIO1           (SMEMC_VIRT + 0x3C)  /* Card interface I/O Space Socket 1 Timing Configuration */
+#define MDMRS           (SMEMC_VIRT + 0x40)  /* MRS value to be written to SDRAM */
+#define BOOT_DEF        (SMEMC_VIRT + 0x44)  /* Read-Only Boot-Time Register. Contains BOOT_SEL and PKG_SEL */
+#define MEMCLKCFG       (SMEMC_VIRT + 0x68)  /* Clock Configuration */
+#define CSADRCFG0       (SMEMC_VIRT + 0x80)  /* Address Configuration Register for CS0 */
+#define CSADRCFG1       (SMEMC_VIRT + 0x84)  /* Address Configuration Register for CS1 */
+#define CSADRCFG2       (SMEMC_VIRT + 0x88)  /* Address Configuration Register for CS2 */
+#define CSADRCFG3       (SMEMC_VIRT + 0x8C)  /* Address Configuration Register for CS3 */
+
+/*
+ * More handy macros for PCMCIA
+ *
+ * Arg is socket number
+ */
+#define MCMEM(s)        (SMEMC_VIRT + 0x28 + ((s)<<2))  /* Card interface Common Memory Space Socket s Timing */
+#define MCATT(s)        (SMEMC_VIRT + 0x30 + ((s)<<2))  /* Card interface Attribute Space Socket s Timing Configuration */
+#define MCIO(s)         (SMEMC_VIRT + 0x38 + ((s)<<2))  /* Card interface I/O Space Socket s Timing Configuration */
+
+/* MECR register defines */
+#define MECR_NOS        (1 << 0)        /* Number Of Sockets: 0 -> 1 sock, 1 -> 2 sock */
+#define MECR_CIT        (1 << 1)        /* Card Is There: 0 -> no card, 1 -> card inserted */
+
+#define MDCNFG_DE0      (1 << 0)        /* SDRAM Bank 0 Enable */
+#define MDCNFG_DE1      (1 << 1)        /* SDRAM Bank 1 Enable */
+#define MDCNFG_DE2      (1 << 16)       /* SDRAM Bank 2 Enable */
+#define MDCNFG_DE3      (1 << 17)       /* SDRAM Bank 3 Enable */
+
+#define MDREFR_K0DB4    (1 << 29)       /* SDCLK0 Divide by 4 Control/Status */
+#define MDREFR_K2FREE   (1 << 25)       /* SDRAM Free-Running Control */
+#define MDREFR_K1FREE   (1 << 24)       /* SDRAM Free-Running Control */
+#define MDREFR_K0FREE   (1 << 23)       /* SDRAM Free-Running Control */
+#define MDREFR_SLFRSH   (1 << 22)       /* SDRAM Self-Refresh Control/Status */
+#define MDREFR_APD      (1 << 20)       /* SDRAM/SSRAM Auto-Power-Down Enable */
+#define MDREFR_K2DB2    (1 << 19)       /* SDCLK2 Divide by 2 Control/Status */
+#define MDREFR_K2RUN    (1 << 18)       /* SDCLK2 Run Control/Status */
+#define MDREFR_K1DB2    (1 << 17)       /* SDCLK1 Divide by 2 Control/Status */
+#define MDREFR_K1RUN    (1 << 16)       /* SDCLK1 Run Control/Status */
+#define MDREFR_E1PIN    (1 << 15)       /* SDCKE1 Level Control/Status */
+#define MDREFR_K0DB2    (1 << 14)       /* SDCLK0 Divide by 2 Control/Status */
+#define MDREFR_K0RUN    (1 << 13)       /* SDCLK0 Run Control/Status */
+#define MDREFR_E0PIN    (1 << 12)       /* SDCKE0 Level Control/Status */
+
+#endif
diff --git a/arch/arm/mach-pxa/lpd270.c b/arch/arm/mach-pxa/lpd270.c
index db615d578c0..8ab62a67780 100644
--- a/arch/arm/mach-pxa/lpd270.c
+++ b/arch/arm/mach-pxa/lpd270.c
@@ -46,6 +46,7 @@
 #include <mach/mmc.h>
 #include <mach/irda.h>
 #include <mach/ohci.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -463,7 +464,7 @@ static void __init lpd270_init(void)
         pxa_set_btuart_info(NULL);
         pxa_set_stuart_info(NULL);
 
-        lpd270_flash_data[0].width = (BOOT_DEF & 1) ? 2 : 4;
+        lpd270_flash_data[0].width = (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
         lpd270_flash_data[1].width = 4;
 
         /*
diff --git a/arch/arm/mach-pxa/lubbock.c b/arch/arm/mach-pxa/lubbock.c
index 5b1cc1c01c6..d3375486c8c 100644
--- a/arch/arm/mach-pxa/lubbock.c
+++ b/arch/arm/mach-pxa/lubbock.c
@@ -50,6 +50,7 @@
 #include <mach/pxafb.h>
 #include <mach/mmc.h>
 #include <mach/pm.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "clock.h"
@@ -525,7 +526,7 @@ static void __init lubbock_init(void)
         pxa_set_ac97_info(NULL);
 
         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
-                (BOOT_DEF & 1) ? 2 : 4;
+                (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
         /* Compensate for the nROMBT switch which swaps the flash banks */
         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
                flashboot?"Flash":"ROM", flashboot);
diff --git a/arch/arm/mach-pxa/mainstone.c b/arch/arm/mach-pxa/mainstone.c
index 8bef7c8bcbb..740c03590e3 100644
--- a/arch/arm/mach-pxa/mainstone.c
+++ b/arch/arm/mach-pxa/mainstone.c
@@ -51,6 +51,7 @@
 #include <mach/irda.h>
 #include <mach/ohci.h>
 #include <plat/pxa27x_keypad.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -565,7 +566,7 @@ static void __init mainstone_init(void)
         pxa_set_btuart_info(NULL);
         pxa_set_stuart_info(NULL);
 
-        mst_flash_data[0].width = (BOOT_DEF & 1) ? 2 : 4;
+        mst_flash_data[0].width = (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
         mst_flash_data[1].width = 4;
 
         /* Compensate for SW7 which swaps the flash banks */
diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index 67200ce25e1..23136b6afa8 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -31,6 +31,7 @@
 #include <mach/reset.h>
 #include <mach/pm.h>
 #include <mach/dma.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -323,8 +324,8 @@ void __init pxa26x_init_irq(void)
 
 static struct map_desc pxa25x_io_desc[] __initdata = {
         {       /* Mem Ctl */
-                .virtual        =  0xf6000000,
-                .pfn            = __phys_to_pfn(0x48000000),
+                .virtual        = SMEMC_VIRT,
+                .pfn            = __phys_to_pfn(PXA2XX_SMEMC_BASE),
                 .length         = 0x00200000,
                 .type           = MT_DEVICE
         },
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index 71dbee42edf..839548d9418 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -17,6 +17,7 @@
 #include <linux/suspend.h>
 #include <linux/platform_device.h>
 #include <linux/sysdev.h>
+#include <linux/io.h>
 
 #include <asm/mach/map.h>
 #include <mach/hardware.h>
@@ -28,6 +29,8 @@
 #include <mach/ohci.h>
 #include <mach/pm.h>
 #include <mach/dma.h>
+#include <mach/smemc.h>
+
 #include <plat/i2c.h>
 
 #include "generic.h"
@@ -255,7 +258,7 @@ enum {
 
 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
 {
-        SAVE(MDREFR);
+        sleep_save[SLEEP_SAVE_MDREFR] = __raw_readl(MDREFR);
         SAVE(PCFR);
 
         SAVE(CKEN);
@@ -264,7 +267,7 @@ void pxa27x_cpu_pm_save(unsigned long *sleep_save)
 
 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
 {
-        RESTORE(MDREFR);
+        __raw_writel(sleep_save[SLEEP_SAVE_MDREFR], MDREFR);
         RESTORE(PCFR);
 
         PSSR = PSSR_RDH | PSSR_PH;
@@ -373,8 +376,8 @@ void __init pxa27x_init_irq(void)
 
 static struct map_desc pxa27x_io_desc[] __initdata = {
         {       /* Mem Ctl */
-                .virtual        =  0xf6000000,
-                .pfn            = __phys_to_pfn(0x48000000),
+                .virtual        = SMEMC_VIRT,
+                .pfn            = __phys_to_pfn(PXA2XX_SMEMC_BASE),
                 .length         = 0x00200000,
                 .type           = MT_DEVICE
         }, {    /* IMem ctl */
diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index 5480a94e646..dc658ad234e 100644
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -31,6 +31,7 @@
 #include <mach/pm.h>
 #include <mach/dma.h>
 #include <mach/regs-intc.h>
+#include <mach/smemc.h>
 #include <plat/i2c.h>
 
 #include "generic.h"
@@ -583,8 +584,8 @@ void __init pxa3xx_init_irq(void)
 
 static struct map_desc pxa3xx_io_desc[] __initdata = {
         {       /* Mem Ctl */
-                .virtual        =  0xf6000000,
-                .pfn            = __phys_to_pfn(0x4a000000),
+                .virtual        = SMEMC_VIRT,
+                .pfn            = __phys_to_pfn(PXA3XX_SMEMC_BASE),
                 .length         = 0x00200000,
                 .type           = MT_DEVICE
         }
diff --git a/arch/arm/mach-pxa/sleep.S b/arch/arm/mach-pxa/sleep.S
index 52c30b01a67..2f5b08aeb52 100644
--- a/arch/arm/mach-pxa/sleep.S
+++ b/arch/arm/mach-pxa/sleep.S
@@ -14,7 +14,7 @@
 #include <linux/linkage.h>
 #include <asm/assembler.h>
 #include <mach/hardware.h>
-
+#include <mach/smemc.h>
 #include <mach/pxa2xx-regs.h>
 
 #define MDREFR_KDIV     0x200a4000      // all banks
diff --git a/arch/arm/mach-pxa/smemc.c b/arch/arm/mach-pxa/smemc.c
index d6f6904132a..232b7316ec0 100644
--- a/arch/arm/mach-pxa/smemc.c
+++ b/arch/arm/mach-pxa/smemc.c
@@ -9,50 +9,37 @@
 #include <linux/sysdev.h>
 
 #include <mach/hardware.h>
-
-#define SMEMC_PHYS_BASE (0x4A000000)
-#define SMEMC_PHYS_SIZE (0x90)
-
-#define MSC0            (0x08)  /* Static Memory Controller Register 0 */
-#define MSC1            (0x0C)  /* Static Memory Controller Register 1 */
-#define SXCNFG          (0x1C)  /* Synchronous Static Memory Control Register */
-#define MEMCLKCFG       (0x68)  /* Clock Configuration */
-#define CSADRCFG0       (0x80)  /* Address Configuration Register for CS0 */
-#define CSADRCFG1       (0x84)  /* Address Configuration Register for CS1 */
-#define CSADRCFG2       (0x88)  /* Address Configuration Register for CS2 */
-#define CSADRCFG3       (0x8C)  /* Address Configuration Register for CS3 */
+#include <mach/smemc.h>
 
 #ifdef CONFIG_PM
-static void __iomem *smemc_mmio_base;
-
 static unsigned long msc[2];
 static unsigned long sxcnfg, memclkcfg;
 static unsigned long csadrcfg[4];
 
 static int pxa3xx_smemc_suspend(struct sys_device *dev, pm_message_t state)
 {
-        msc[0] = __raw_readl(smemc_mmio_base + MSC0);
-        msc[1] = __raw_readl(smemc_mmio_base + MSC1);
-        sxcnfg = __raw_readl(smemc_mmio_base + SXCNFG);
-        memclkcfg = __raw_readl(smemc_mmio_base + MEMCLKCFG);
-        csadrcfg[0] = __raw_readl(smemc_mmio_base + CSADRCFG0);
-        csadrcfg[1] = __raw_readl(smemc_mmio_base + CSADRCFG1);
-        csadrcfg[2] = __raw_readl(smemc_mmio_base + CSADRCFG2);
-        csadrcfg[3] = __raw_readl(smemc_mmio_base + CSADRCFG3);
+        msc[0] = __raw_readl(MSC0);
+        msc[1] = __raw_readl(MSC1);
+        sxcnfg = __raw_readl(SXCNFG);
+        memclkcfg = __raw_readl(MEMCLKCFG);
+        csadrcfg[0] = __raw_readl(CSADRCFG0);
+        csadrcfg[1] = __raw_readl(CSADRCFG1);
+        csadrcfg[2] = __raw_readl(CSADRCFG2);
+        csadrcfg[3] = __raw_readl(CSADRCFG3);
 
         return 0;
 }
 
 static int pxa3xx_smemc_resume(struct sys_device *dev)
 {
-        __raw_writel(msc[0], smemc_mmio_base + MSC0);
-        __raw_writel(msc[1], smemc_mmio_base + MSC1);
-        __raw_writel(sxcnfg, smemc_mmio_base + SXCNFG);
-        __raw_writel(memclkcfg, smemc_mmio_base + MEMCLKCFG);
-        __raw_writel(csadrcfg[0], smemc_mmio_base + CSADRCFG0);
-        __raw_writel(csadrcfg[1], smemc_mmio_base + CSADRCFG1);
-        __raw_writel(csadrcfg[2], smemc_mmio_base + CSADRCFG2);
-        __raw_writel(csadrcfg[3], smemc_mmio_base + CSADRCFG3);
+        __raw_writel(msc[0], MSC0);
+        __raw_writel(msc[1], MSC1);
+        __raw_writel(sxcnfg, SXCNFG);
+        __raw_writel(memclkcfg, MEMCLKCFG);
+        __raw_writel(csadrcfg[0], CSADRCFG0);
+        __raw_writel(csadrcfg[1], CSADRCFG1);
+        __raw_writel(csadrcfg[2], CSADRCFG2);
+        __raw_writel(csadrcfg[3], CSADRCFG3);
 
         return 0;
 }
@@ -73,10 +60,6 @@ static int __init smemc_init(void)
         int ret = 0;
 
         if (cpu_is_pxa3xx()) {
-                smemc_mmio_base = ioremap(SMEMC_PHYS_BASE, SMEMC_PHYS_SIZE);
-                if (smemc_mmio_base == NULL)
-                        return -ENODEV;
-
                 ret = sysdev_class_register(&smemc_sysclass);
                 if (ret)
                         return ret;
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 38bcc2a0c51..0499a69e767 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -45,6 +45,7 @@
 #include <mach/pxa2xx_spi.h>
 #include <mach/spitz.h>
 #include <mach/sharpsl_pm.h>
+#include <mach/smemc.h>
 
 #include <plat/i2c.h>
 
@@ -930,9 +931,10 @@ static void spitz_poweroff(void)
 
 static void spitz_restart(char mode, const char *cmd)
 {
+        uint32_t msc0 = __raw_readl(MSC0);
         /* Bootloader magic for a reboot */
-        if ((MSC0 & 0xffff0000) == 0x7ff00000)
-                MSC0 = (MSC0 & 0xffff) | 0x7ee00000;
+        if ((msc0 & 0xffff0000) == 0x7ff00000)
+                __raw_writel((msc0 & 0xffff) | 0x7ee00000, MSC0);
 
         spitz_poweroff();
 }
diff --git a/arch/arm/mach-pxa/stargate2.c b/arch/arm/mach-pxa/stargate2.c
index 19f5378e766..3498a142394 100644
--- a/arch/arm/mach-pxa/stargate2.c
+++ b/arch/arm/mach-pxa/stargate2.c
@@ -48,6 +48,7 @@
 #include <mach/udc.h>
 #include <mach/pxa2xx_spi.h>
 #include <mach/pxa27x-udc.h>
+#include <mach/smemc.h>
 
 #include <linux/spi/spi.h>
 #include <linux/mfd/da903x.h>
@@ -976,7 +977,7 @@ static void __init stargate2_init(void)
 {
         /* This is probably a board specific hack as this must be set
            prior to connecting the MFP stuff up. */
-        MECR &= ~MECR_NOS;
+        __raw_writel(__raw_readl(MECR) & ~MECR_NOS, MECR);
 
         pxa2xx_mfp_config(ARRAY_AND_SIZE(stargate2_pin_config));
 
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 38833858cf8..57d61ee9b22 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -46,6 +46,7 @@
 #include <mach/tosa_bt.h>
 #include <mach/pxa2xx_spi.h>
 #include <mach/audio.h>
+#include <mach/smemc.h>
 
 #include <asm/mach/arch.h>
 #include <mach/tosa.h>
@@ -893,9 +894,11 @@ static void tosa_poweroff(void)
 
 static void tosa_restart(char mode, const char *cmd)
 {
+        uint32_t msc0 = __raw_readl(MSC0);
+
         /* Bootloader magic for a reboot */
-        if((MSC0 & 0xffff0000) == 0x7ff00000)
-                MSC0 = (MSC0 & 0xffff) | 0x7ee00000;
+        if((msc0 & 0xffff0000) == 0x7ff00000)
+                __raw_writel((msc0 & 0xffff) | 0x7ee00000, MSC0);
 
         tosa_poweroff();
 }
diff --git a/arch/arm/mach-pxa/trizeps4.c b/arch/arm/mach-pxa/trizeps4.c
index ab3b933e346..43fc9ca1459 100644
--- a/arch/arm/mach-pxa/trizeps4.c
+++ b/arch/arm/mach-pxa/trizeps4.c
@@ -47,6 +47,7 @@
 #include <mach/mmc.h>
 #include <mach/irda.h>
 #include <mach/ohci.h>
+#include <mach/smemc.h>
 #include <plat/i2c.h>
 
 #include "generic.h"
@@ -542,7 +543,7 @@ static void __init trizeps4_map_io(void)
         pxa27x_map_io();
         iotable_init(trizeps4_io_desc, ARRAY_SIZE(trizeps4_io_desc));
 
-        if ((MSC0 & 0x8) && (BOOT_DEF & 0x1)) {
+        if ((__raw_readl(MSC0) & 0x8) && (__raw_readl(BOOT_DEF) & 0x1)) {
                 /* if flash is 16 bit wide its a Trizeps4 WL */
                 __machine_arch_type = MACH_TYPE_TRIZEPS4WL;
                 trizeps4_flash_data[0].width = 2;
diff --git a/arch/arm/mach-pxa/xcep.c b/arch/arm/mach-pxa/xcep.c
index 99744f4d05a..51c0281c6e0 100644
--- a/arch/arm/mach-pxa/xcep.c
+++ b/arch/arm/mach-pxa/xcep.c
@@ -31,6 +31,7 @@
 #include <mach/hardware.h>
 #include <mach/pxa2xx-regs.h>
 #include <mach/mfp-pxa25x.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 
@@ -172,9 +173,9 @@ static void __init xcep_init(void)
 
         /* See Intel XScale Developer's Guide for details */
         /* Set RDF and RDN to appropriate values (chip select 3 (smc91x)) */
-        MSC1 = (MSC1 & 0xffff) | 0xD5540000;
+        __raw_writel((__raw_readl(MSC1) & 0xffff) | 0xD5540000, MSC1);
         /* Set RDF and RDN to appropriate values (chip select 5 (fpga)) */
-        MSC2 = (MSC2 & 0xffff) | 0x72A00000;
+        __raw_writel((__raw_readl(MSC2) & 0xffff) | 0x72A00000, MSC2);
 
         platform_add_devices(ARRAY_AND_SIZE(devices));
         pxa_set_i2c_info(&xcep_i2c_platform_data);
diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c
index 0909df2151e..c87f2b35ee0 100644
--- a/arch/arm/mach-pxa/zeus.c
+++ b/arch/arm/mach-pxa/zeus.c
@@ -47,6 +47,7 @@
 #include <mach/audio.h>
 #include <mach/arcom-pcmcia.h>
 #include <mach/zeus.h>
+#include <mach/smemc.h>
 
 #include "generic.h"
 
@@ -823,13 +824,16 @@ static mfp_cfg_t zeus_pin_config[] __initdata = {
 static void __init zeus_init(void)
 {
         u16 dm9000_msc = DM9K_MSC_VALUE;
+        u32 msc0, msc1;
 
         system_rev = __raw_readw(ZEUS_CPLD_VERSION);
         pr_info("Zeus CPLD V%dI%d\n", (system_rev & 0xf0) >> 4, (system_rev & 0x0f));
 
         /* Fix timings for dm9000s (CS1/CS2)*/
-        MSC0 = (MSC0 & 0xffff) | (dm9000_msc << 16);
-        MSC1 = (MSC1 & 0xffff0000) | dm9000_msc;
+        msc0 = __raw_readl(MSC0) & 0x0000ffff | (dm9000_msc << 16);
+        msc1 = __raw_readl(MSC1) & 0xffff0000 | dm9000_msc;
+        __raw_writel(msc0, MSC0);
+        __raw_writel(msc1, MSC1);
 
         pm_power_off = zeus_power_off;
         zeus_setup_apm();