Merge tag 'mvebu-defconfig-3.17-2' of git://git.infradead.org/linux-mvebu into next...

[cascardo/linux.git] / arch / sparc / mm / iommu.c

diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c
index 35384cb..491511d 100644 (file)
--- a/arch/sparc/mm/iommu.c
+++ b/arch/sparc/mm/iommu.c
@@ -58,6 +58,8 @@ static void __init sbus_iommu_init(struct platform_device *op)
        struct iommu_struct *iommu;
        unsigned int impl, vers;
        unsigned long *bitmap;
+       unsigned long control;
+       unsigned long base;
        unsigned long tmp;
 
        iommu = kmalloc(sizeof(struct iommu_struct), GFP_KERNEL);
@@ -72,12 +74,14 @@ static void __init sbus_iommu_init(struct platform_device *op)
                prom_printf("Cannot map IOMMU registers\n");
                prom_halt();
        }
-       impl = (iommu->regs->control & IOMMU_CTRL_IMPL) >> 28;
-       vers = (iommu->regs->control & IOMMU_CTRL_VERS) >> 24;
-       tmp = iommu->regs->control;
-       tmp &= ~(IOMMU_CTRL_RNGE);
-       tmp |= (IOMMU_RNGE_256MB | IOMMU_CTRL_ENAB);
-       iommu->regs->control = tmp;
+
+       control = sbus_readl(&iommu->regs->control);
+       impl = (control & IOMMU_CTRL_IMPL) >> 28;
+       vers = (control & IOMMU_CTRL_VERS) >> 24;
+       control &= ~(IOMMU_CTRL_RNGE);
+       control |= (IOMMU_RNGE_256MB | IOMMU_CTRL_ENAB);
+       sbus_writel(control, &iommu->regs->control);
+
        iommu_invalidate(iommu->regs);
        iommu->start = IOMMU_START;
        iommu->end = 0xffffffff;
@@ -99,7 +103,9 @@ static void __init sbus_iommu_init(struct platform_device *op)
        memset(iommu->page_table, 0, IOMMU_NPTES*sizeof(iopte_t));
        flush_cache_all();
        flush_tlb_all();
-       iommu->regs->base = __pa((unsigned long) iommu->page_table) >> 4;
+
+       base = __pa((unsigned long)iommu->page_table) >> 4;
+       sbus_writel(base, &iommu->regs->base);
        iommu_invalidate(iommu->regs);
 
        bitmap = kmalloc(IOMMU_NPTES>>3, GFP_KERNEL);