#include <asm/setup.h>
 #include <asm/rtlx.h>
 
-static unsigned long _msc01_biu_base;
+static void __iomem *_msc01_biu_base;
 
 static DEFINE_RAW_SPINLOCK(mips_irq_lock);
 
                gic_present = 1;
        } else {
                if (mips_revision_sconid == MIPS_REVISION_SCON_ROCIT) {
-                       _msc01_biu_base = (unsigned long)
-                                       ioremap_nocache(MSC01_BIU_REG_BASE,
+                       _msc01_biu_base = ioremap_nocache(MSC01_BIU_REG_BASE,
                                                MSC01_BIU_ADDRSPACE_SZ);
-                       gic_present = (REG(_msc01_biu_base, MSC01_SC_CFG) &
-                                       MSC01_SC_CFG_GICPRES_MSK) >>
-                                       MSC01_SC_CFG_GICPRES_SHF;
+                       gic_present =
+                         (__raw_readl(_msc01_biu_base + MSC01_SC_CFG_OFS) &
+                          MSC01_SC_CFG_GICPRES_MSK) >>
+                         MSC01_SC_CFG_GICPRES_SHF;
                }
        }
        if (gic_present)
                         MIPS_GIC_IRQ_BASE);
                if (!mips_cm_present()) {
                        /* Enable the GIC */
-                       i = REG(_msc01_biu_base, MSC01_SC_CFG);
-                       REG(_msc01_biu_base, MSC01_SC_CFG) =
-                               (i | (0x1 << MSC01_SC_CFG_GICENA_SHF));
+                       i = __raw_readl(_msc01_biu_base + MSC01_SC_CFG_OFS);
+                       __raw_writel(i | (0x1 << MSC01_SC_CFG_GICENA_SHF),
+                                _msc01_biu_base + MSC01_SC_CFG_OFS);
                        pr_debug("GIC Enabled\n");
                }
                i8259_irq = MIPS_GIC_IRQ_BASE + GIC_INT_I8259A;