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Commit 2a96536e authored by KyongHo Cho's avatar KyongHo Cho Committed by Kukjin Kim
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iommu/exynos: Add iommu driver for EXYNOS Platforms 



This is the System MMU driver and IOMMU API implementation for
EXYNOS SoC platforms. EXYNOS platforms has more than 10 System
MMUs dedicated for each multimedia accelerators.

The System MMU driver is already in arc/arm/plat-s5p but it is
moved to drivers/iommu due to Ohad Ben-Cohen gathered IOMMU
drivers there.

Any device driver in EXYNOS platforms that needs to control its
System MMU must call platform_set_sysmmu() to inform System MMU
driver who will control it. platform_set_sysmmu() is defined in
<mach/sysmmu.h>

Signed-off-by: default avatarKyongHo Cho <pullip.cho@samsung.com>
Acked-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent bca10b90

drivers/iommu/Kconfig

+21 −0
Original line number Diff line number Diff line
@@ -162,4 +162,25 @@ config TEGRA_IOMMU_SMMU 
	  space through the SMMU (System Memory Management Unit)

	  hardware included on Tegra SoCs.



config EXYNOS_IOMMU

	bool "Exynos IOMMU Support"

	depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU

	select IOMMU_API

	help

	  Support for the IOMMU(System MMU) of Samsung Exynos application

	  processor family. This enables H/W multimedia accellerators to see

	  non-linear physical memory chunks as a linear memory in their

	  address spaces



	  If unsure, say N here.



config EXYNOS_IOMMU_DEBUG

	bool "Debugging log for Exynos IOMMU"

	depends on EXYNOS_IOMMU

	help

	  Select this to see the detailed log message that shows what

	  happens in the IOMMU driver



	  Say N unless you need kernel log message for IOMMU debugging



endif # IOMMU_SUPPORT

drivers/iommu/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -10,3 +10,4 @@ obj-$(CONFIG_OMAP_IOVMM) += omap-iovmm.o 
obj-$(CONFIG_OMAP_IOMMU_DEBUG) += omap-iommu-debug.o

obj-$(CONFIG_TEGRA_IOMMU_GART) += tegra-gart.o

obj-$(CONFIG_TEGRA_IOMMU_SMMU) += tegra-smmu.o

obj-$(CONFIG_EXYNOS_IOMMU) += exynos-iommu.o

drivers/iommu/exynos-iommu.c

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File added.

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