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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 <ben.dooks@codethink.co.uk> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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1 changed files with 5 additions and 1 deletions
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@ -54,6 +54,10 @@ typedef u32 sysmmu_pte_t;
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#define lv2ent_small(pent) ((*(pent) & 2) == 2)
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#define lv2ent_large(pent) ((*(pent) & 3) == 1)
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#ifdef CONFIG_BIG_ENDIAN
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#warning "revisit driver if we can enable big-endian ptes"
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#endif
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/*
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* v1.x - v3.x SYSMMU supports 32bit physical and 32bit virtual address spaces
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* v5.0 introduced support for 36bit physical address space by shifting
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@ -710,7 +714,7 @@ static inline void update_pte(sysmmu_pte_t *ent, sysmmu_pte_t val)
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{
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dma_sync_single_for_cpu(dma_dev, virt_to_phys(ent), sizeof(*ent),
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DMA_TO_DEVICE);
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*ent = val;
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*ent = cpu_to_le32(val);
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dma_sync_single_for_device(dma_dev, virt_to_phys(ent), sizeof(*ent),
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DMA_TO_DEVICE);
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}
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