From c43cdfbc4cebdf1a7992432615bf5155b51b8cc0 Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Tue, 18 Sep 2012 09:57:47 +0000 Subject: 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 Acked-by: Rob Herring CC: devicetree-discuss@lists.ozlabs.org CC: David Vrabel CC: Rob Herring CC: Dave Martin --- Documentation/devicetree/bindings/arm/xen.txt | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/xen.txt (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/arm/xen.txt b/Documentation/devicetree/bindings/arm/xen.txt new file mode 100644 index 000000000000..0f7b9c2109f8 --- /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-", "xen,xen"; + where 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>; +}; -- cgit v1.2.3-59-g8ed1b