combined interrupt, it must be listed multiple times.
- #iommu-cells : See Documentation/devicetree/bindings/iommu/iommu.txt
- for details. With a value of 1, each "iommus" entry
+ for details. With a value of 1, each IOMMU specifier
represents a distinct stream ID emitted by that device
into the relevant SMMU.
SMMUs with stream matching support and complex masters
- may use a value of 2, where the second cell represents
- an SMR mask to combine with the ID in the first cell.
- Care must be taken to ensure the set of matched IDs
- does not result in conflicts.
+ may use a value of 2, where the second cell of the
+ IOMMU specifier represents an SMR mask to combine with
+ the ID in the first cell. Care must be taken to ensure
+ the set of matched IDs does not result in conflicts.
** System MMU optional properties:
Optional properties
-------------------
-- iommu-map: Maps a Requester ID to an IOMMU and associated iommu-specifier
+- iommu-map: Maps a Requester ID to an IOMMU and associated IOMMU specifier
data.
The property is an arbitrary number of tuples of
(rid-base,iommu,iommu-base,length).
Any RID r in the interval [rid-base, rid-base + length) is associated with
- the listed IOMMU, with the iommu-specifier (r - rid-base + iommu-base).
+ the listed IOMMU, with the IOMMU specifier (r - rid-base + iommu-base).
- iommu-map-mask: A mask to be applied to each Requester ID prior to being
- mapped to an iommu-specifier per the iommu-map property.
+ mapped to an IOMMU specifier per the iommu-map property.
Example (1)