OvmfPkg/Csm/LegacyBiosDxe: Fix Legacy16GetTableAddress call for E820 data

[mirror_edk2.git] / OvmfPkg / XenBusDxe / EventChannel.c

/** @file\r
  Event Channel function implementation.\r
\r
  Event channel are use to notify of an event that happened in a shared\r
  structure for example.\r
\r
  Copyright (C) 2014, Citrix Ltd.\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
#include "EventChannel.h"\r
\r
#include <Library/XenHypercallLib.h>\r
\r
UINT32\r
XenEventChannelNotify (\r
  IN XENBUS_DEVICE *Dev,\r
  IN evtchn_port_t Port\r
  )\r
{\r
  INTN ReturnCode;\r
  evtchn_send_t Send;\r
\r
  Send.port = Port;\r
  ReturnCode = XenHypercallEventChannelOp (EVTCHNOP_send, &Send);\r
  return (UINT32)ReturnCode;\r
}\r
\r
UINT32\r
EFIAPI\r
XenBusEventChannelAllocate (\r
  IN  XENBUS_PROTOCOL *This,\r
  IN  domid_t         DomainId,\r
  OUT evtchn_port_t   *Port\r
  )\r
{\r
  evtchn_alloc_unbound_t Parameter;\r
  UINT32 ReturnCode;\r
\r
  Parameter.dom = DOMID_SELF;\r
  Parameter.remote_dom = DomainId;\r
  ReturnCode = (UINT32)XenHypercallEventChannelOp (\r
                                   EVTCHNOP_alloc_unbound,\r
                                   &Parameter);\r
  if (ReturnCode != 0) {\r
    DEBUG ((EFI_D_ERROR, "ERROR: alloc_unbound failed with rc=%d", ReturnCode));\r
    return ReturnCode;\r
  }\r
  *Port = Parameter.port;\r
  return ReturnCode;\r
}\r
\r
UINT32\r
EFIAPI\r
XenBusEventChannelNotify (\r
  IN XENBUS_PROTOCOL *This,\r
  IN evtchn_port_t   Port\r
  )\r
{\r
  XENBUS_PRIVATE_DATA *Private;\r
\r
  Private = XENBUS_PRIVATE_DATA_FROM_THIS(This);\r
  return XenEventChannelNotify (Private->Dev, Port);\r
}\r
\r
UINT32\r
EFIAPI\r
XenBusEventChannelClose (\r
  IN XENBUS_PROTOCOL *This,\r
  IN evtchn_port_t   Port\r
  )\r
{\r
  evtchn_close_t Close;\r
\r
  Close.port = Port;\r
  return (UINT32)XenHypercallEventChannelOp (EVTCHNOP_close, &Close);\r
}\r