projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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. |