From 6ae5343c26f9cba5e9ef8ba6f23b5bb255ebc798 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Wed, 8 Jun 2016 19:31:10 +0100 Subject: iommu/exynos: update to use iommu big-endian Add initial support for big endian by always writing the pte in le32. Note, revisit if hardware capable of doing big endian fetches. Signed-off-by: Ben Dooks Acked-by: Marek Szyprowski Signed-off-by: Joerg Roedel --- drivers/iommu/exynos-iommu.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/iommu/exynos-iommu.c') diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 633e6d023c0d..33dcc29ec200 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -54,6 +54,10 @@ typedef u32 sysmmu_pte_t; #define lv2ent_small(pent) ((*(pent) & 2) == 2) #define lv2ent_large(pent) ((*(pent) & 3) == 1) +#ifdef CONFIG_BIG_ENDIAN +#warning "revisit driver if we can enable big-endian ptes" +#endif + /* * v1.x - v3.x SYSMMU supports 32bit physical and 32bit virtual address spaces * v5.0 introduced support for 36bit physical address space by shifting @@ -710,7 +714,7 @@ static inline void update_pte(sysmmu_pte_t *ent, sysmmu_pte_t val) { dma_sync_single_for_cpu(dma_dev, virt_to_phys(ent), sizeof(*ent), DMA_TO_DEVICE); - *ent = val; + *ent = cpu_to_le32(val); dma_sync_single_for_device(dma_dev, virt_to_phys(ent), sizeof(*ent), DMA_TO_DEVICE); } -- cgit