OvmfPkg/Include/Protocol/XenIo.h

   1 /** @file
   2   XenIo protocol to abstract arch specific details
   3
   4   The Xen implementations for the Intel and ARM architectures differ in the way
   5   the base address of the grant table is communicated to the guest. The former
   6   uses a virtual PCI device, while the latter uses a device tree node.
   7   In order to allow the XenBusDxe UEFI driver to be reused for the non-PCI
   8   Xen implementation, this abstract protocol can be installed on a handle
   9   with the appropriate base address.
  10
  11   Copyright (C) 2014, Linaro Ltd.
  12
  13   SPDX-License-Identifier: BSD-2-Clause-Patent
  14
  15 **/
  16
  17 #ifndef __PROTOCOL_XENIO_H__
  18 #define __PROTOCOL_XENIO_H__
  19
  20 #include <IndustryStandard/Xen/xen.h>
  21
  22 #define XENIO_PROTOCOL_GUID \
  23   {0x6efac84f, 0x0ab0, 0x4747, {0x81, 0xbe, 0x85, 0x55, 0x62, 0x59, 0x04, 0x49}}
  24
  25 ///
  26 /// Forward declaration
  27 ///
  28 typedef struct _XENIO_PROTOCOL XENIO_PROTOCOL;
  29
  30 ///
  31 /// Protocol structure
  32 ///
  33 struct _XENIO_PROTOCOL {
  34   //
  35   // Protocol data fields
  36   //
  37   EFI_PHYSICAL_ADDRESS    GrantTableAddress;
  38 };
  39
  40 extern EFI_GUID  gXenIoProtocolGuid;
  41
  42 #endif