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c43cdfbc SS |
1 | * Xen hypervisor device tree bindings |
2 | ||
3 | Xen ARM virtual platforms shall have a top-level "hypervisor" node with | |
4 | the following properties: | |
5 | ||
6 | - compatible: | |
7 | compatible = "xen,xen-<version>", "xen,xen"; | |
8 | where <version> is the version of the Xen ABI of the platform. | |
9 | ||
10 | - reg: specifies the base physical address and size of a region in | |
11 | memory where the grant table should be mapped to, using an | |
12 | HYPERVISOR_memory_op hypercall. The memory region is large enough to map | |
13 | the whole grant table (it is larger or equal to gnttab_max_grant_frames()). | |
9d2f145f | 14 | This property is unnecessary when booting Dom0 using ACPI. |
c43cdfbc SS |
15 | |
16 | - interrupts: the interrupt used by Xen to inject event notifications. | |
17 | A GIC node is also required. | |
9d2f145f | 18 | This property is unnecessary when booting Dom0 using ACPI. |
c43cdfbc | 19 | |
9d2f145f SZ |
20 | To support UEFI on Xen ARM virtual platforms, Xen populates the FDT "uefi" node |
21 | under /hypervisor with following parameters: | |
22 | ||
23 | ________________________________________________________________________________ | |
24 | Name | Size | Description | |
25 | ================================================================================ | |
26 | xen,uefi-system-table | 64-bit | Guest physical address of the UEFI System | |
27 | | | Table. | |
28 | -------------------------------------------------------------------------------- | |
29 | xen,uefi-mmap-start | 64-bit | Guest physical address of the UEFI memory | |
30 | | | map. | |
31 | -------------------------------------------------------------------------------- | |
32 | xen,uefi-mmap-size | 32-bit | Size in bytes of the UEFI memory map | |
33 | | | pointed to in previous entry. | |
34 | -------------------------------------------------------------------------------- | |
35 | xen,uefi-mmap-desc-size | 32-bit | Size in bytes of each entry in the UEFI | |
36 | | | memory map. | |
37 | -------------------------------------------------------------------------------- | |
38 | xen,uefi-mmap-desc-ver | 32-bit | Version of the mmap descriptor format. | |
39 | -------------------------------------------------------------------------------- | |
c43cdfbc SS |
40 | |
41 | Example (assuming #address-cells = <2> and #size-cells = <2>): | |
42 | ||
43 | hypervisor { | |
44 | compatible = "xen,xen-4.3", "xen,xen"; | |
45 | reg = <0 0xb0000000 0 0x20000>; | |
46 | interrupts = <1 15 0xf08>; | |
9d2f145f SZ |
47 | uefi { |
48 | xen,uefi-system-table = <0xXXXXXXXX>; | |
49 | xen,uefi-mmap-start = <0xXXXXXXXX>; | |
50 | xen,uefi-mmap-size = <0xXXXXXXXX>; | |
51 | xen,uefi-mmap-desc-size = <0xXXXXXXXX>; | |
52 | xen,uefi-mmap-desc-ver = <0xXXXXXXXX>; | |
53 | }; | |
c43cdfbc | 54 | }; |
9d2f145f SZ |
55 | |
56 | The format and meaning of the "xen,uefi-*" parameters are similar to those in | |
57 | Documentation/arm/uefi.txt, which are provided by the regular UEFI stub. However | |
58 | they differ because they are provided by the Xen hypervisor, together with a set | |
59 | of UEFI runtime services implemented via hypercalls, see | |
60 | http://xenbits.xen.org/docs/unstable/hypercall/x86_64/include,public,platform.h.html. |