diff options
author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2012-09-18 09:57:47 +0000 |
---|---|---|
committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2012-09-18 09:57:47 +0000 |
commit | c43cdfbc4cebdf1a7992432615bf5155b51b8cc0 (patch) | |
tree | 0d5efba2b8e2bc471c581f97f3bc5b28292c5cc1 /Documentation/devicetree/bindings/arm/xen.txt | |
parent | 226f52e931ae6235d221629e6a8497fb111cfcd4 (diff) | |
download | op-kernel-dev-c43cdfbc4cebdf1a7992432615bf5155b51b8cc0.zip op-kernel-dev-c43cdfbc4cebdf1a7992432615bf5155b51b8cc0.tar.gz |
docs: Xen ARM DT bindings
Add a doc to describe the Xen ARM device tree bindings
Changes in v5:
- add a comment about the size of the grant table memory region;
- add a comment about the required presence of a GIC node;
- specify that the described properties are part of a top-level
"hypervisor" node;
- specify #address-cells and #size-cells for the example.
Changes in v4:
- "xen,xen" should be last as it is less specific;
- update reg property using 2 address-cells and 2 size-cells.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
CC: devicetree-discuss@lists.ozlabs.org
CC: David Vrabel <david.vrabel@citrix.com>
CC: Rob Herring <robherring2@gmail.com>
CC: Dave Martin <dave.martin@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/arm/xen.txt')
-rw-r--r-- | Documentation/devicetree/bindings/arm/xen.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/xen.txt b/Documentation/devicetree/bindings/arm/xen.txt new file mode 100644 index 0000000..0f7b9c2 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/xen.txt @@ -0,0 +1,25 @@ +* Xen hypervisor device tree bindings + +Xen ARM virtual platforms shall have a top-level "hypervisor" node with +the following properties: + +- compatible: + compatible = "xen,xen-<version>", "xen,xen"; + where <version> is the version of the Xen ABI of the platform. + +- reg: specifies the base physical address and size of a region in + memory where the grant table should be mapped to, using an + HYPERVISOR_memory_op hypercall. The memory region is large enough to map + the whole grant table (it is larger or equal to gnttab_max_grant_frames()). + +- interrupts: the interrupt used by Xen to inject event notifications. + A GIC node is also required. + + +Example (assuming #address-cells = <2> and #size-cells = <2>): + +hypervisor { + compatible = "xen,xen-4.3", "xen,xen"; + reg = <0 0xb0000000 0 0x20000>; + interrupts = <1 15 0xf08>; +}; |