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-* ARM SMMUv3 Architecture Implementation
-
-The SMMUv3 architecture is a significant departure from previous
-revisions, replacing the MMIO register interface with in-memory command
-and event queues and adding support for the ATS and PRI components of
-the PCIe specification.
-
-** SMMUv3 required properties:
-
-- compatible : Should include:
-
- * "arm,smmu-v3" for any SMMUv3 compliant
- implementation. This entry should be last in the
- compatible list.
-
-- reg : Base address and size of the SMMU.
-
-- interrupts : Non-secure interrupt list describing the wired
- interrupt sources corresponding to entries in
- interrupt-names. If no wired interrupts are
- present then this property may be omitted.
-
-- interrupt-names : When the interrupts property is present, should
- include the following:
- * "eventq" - Event Queue not empty
- * "priq" - PRI Queue not empty
- * "cmdq-sync" - CMD_SYNC complete
- * "gerror" - Global Error activated
- * "combined" - The combined interrupt is optional,
- and should only be provided if the
- hardware supports just a single,
- combined interrupt line.
- If provided, then the combined interrupt
- will be used in preference to any others.
-
-- #iommu-cells : See the generic IOMMU binding described in
- devicetree/bindings/pci/pci-iommu.txt
- for details. For SMMUv3, must be 1, with each cell
- describing a single stream ID. All possible stream
- IDs which a device may emit must be described.
-
-** SMMUv3 optional properties:
-
-- dma-coherent : Present if DMA operations made by the SMMU (page
- table walks, stream table accesses etc) are cache
- coherent with the CPU.
-
- NOTE: this only applies to the SMMU itself, not
- masters connected upstream of the SMMU.
-
-- msi-parent : See the generic MSI binding described in
- devicetree/bindings/interrupt-controller/msi.txt
- for a description of the msi-parent property.
-
-- hisilicon,broken-prefetch-cmd
- : Avoid sending CMD_PREFETCH_* commands to the SMMU.
-
-- cavium,cn9900-broken-page1-regspace
- : Replaces all page 1 offsets used for EVTQ_PROD/CONS,
- PRIQ_PROD/CONS register access with page 0 offsets.
- Set for Cavium ThunderX2 silicon that doesn't support
- SMMU page1 register space.
-
-** Example
-
- smmu@2b400000 {
- compatible = "arm,smmu-v3";
- reg = <0x0 0x2b400000 0x0 0x20000>;
- interrupts = <GIC_SPI 74 IRQ_TYPE_EDGE_RISING>,
- <GIC_SPI 75 IRQ_TYPE_EDGE_RISING>,
- <GIC_SPI 77 IRQ_TYPE_EDGE_RISING>,
- <GIC_SPI 79 IRQ_TYPE_EDGE_RISING>;
- interrupt-names = "eventq", "priq", "cmdq-sync", "gerror";
- dma-coherent;
- #iommu-cells = <1>;
- msi-parent = <&its 0xff0000>;
- };