OvmfPkg/Virtio.h: Added the Virtio Vendor and MMIO IDs

[mirror_edk2.git] / ArmPkg / Drivers / PL390Gic / PL390Gic.c

/** @file\r
*\r
*  Copyright (c) 2011-2012, ARM Limited. All rights reserved.\r
*  \r
*  This program and the accompanying materials                          \r
*  are licensed and made available under the terms and conditions of the BSD License         \r
*  which accompanies this distribution.  The full text of the license may be found at        \r
*  http://opensource.org/licenses/bsd-license.php                                            \r
*\r
*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
*\r
**/\r
\r
#include <Uefi.h>\r
#include <Library/IoLib.h>\r
#include <Library/ArmGicLib.h>\r
#include <Library/PcdLib.h>\r
\r
UINTN\r
EFIAPI\r
ArmGicGetMaxNumInterrupts (\r
  IN  INTN          GicDistributorBase\r
  )\r
{\r
  return 32 * ((MmioRead32 (GicDistributorBase + ARM_GIC_ICDICTR) & 0x1F) + 1);\r
}\r
\r
VOID\r
EFIAPI\r
ArmGicSendSgiTo (\r
  IN  INTN          GicDistributorBase,\r
  IN  INTN          TargetListFilter,\r
  IN  INTN          CPUTargetList,\r
  IN  INTN          SgiId\r
  )\r
{\r
  MmioWrite32 (GicDistributorBase + ARM_GIC_ICDSGIR, ((TargetListFilter & 0x3) << 24) | ((CPUTargetList & 0xFF) << 16) | SgiId);\r
}\r
\r
RETURN_STATUS\r
EFIAPI\r
ArmGicAcknowledgeInterrupt (\r
  IN  UINTN          GicDistributorBase,\r
  IN  UINTN          GicInterruptInterfaceBase,\r
  OUT UINTN          *CoreId,\r
  OUT UINTN          *InterruptId\r
  )\r
{\r
  UINT32            Interrupt;\r
\r
  // Read the Interrupt Acknowledge Register\r
  Interrupt = MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCIAR);\r
\r
  // Check if it is a valid interrupt ID\r
  if ((Interrupt & 0x3FF) < ArmGicGetMaxNumInterrupts (GicDistributorBase)) {\r
    // Got a valid SGI number hence signal End of Interrupt by writing to ICCEOIR\r
    MmioWrite32 (GicInterruptInterfaceBase + ARM_GIC_ICCEIOR, Interrupt);\r
\r
    if (CoreId) {\r
      *CoreId = (Interrupt >> 10) & 0x7;\r
    }\r
    if (InterruptId) {\r
      *InterruptId = Interrupt & 0x3FF;\r
    }\r
    return RETURN_SUCCESS;\r
  } else {\r
    return RETURN_INVALID_PARAMETER;\r
  }\r
}\r