Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6ae5343c authored by Ben Dooks's avatar Ben Dooks Committed by Joerg Roedel
Browse files

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: default avatarBen Dooks <ben.dooks@codethink.co.uk>
Acked-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 96f66557

drivers/iommu/exynos-iommu.c

+5 −1
Original line number Diff line number Diff line
@@ -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);

}