1 files changed, 119 insertions, 0 deletions
diff --git a/OvmfPkg/Csm/CsmSupportLib/LegacyInterrupt.h b/OvmfPkg/Csm/CsmSupportLib/LegacyInterrupt.h
new file mode 100644
index 0000000000..193e48bad2
--- /dev/null
+++ b/OvmfPkg/Csm/CsmSupportLib/LegacyInterrupt.h
@@ -0,0 +1,119 @@
+/** @file
+  Legacy Region Support
+
+  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
+
+  This program and the accompanying materials are
+  licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef _LEGACY_INTERRUPT_H_
+#define _LEGACY_INTERRUPT_H_
+
+#include <PiDxe.h>
+
+#include <Protocol/LegacyInterrupt.h>
+
+#include <Library/PciLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#define LEGACY_INT_BUS  0
+#define LEGACY_INT_DEV  1
+#define LEGACY_INT_FUNC 0
+
+#define PIRQN           0x00  // PIRQ Null
+#define PIRQA           0x60
+#define PIRQB           0x61
+#define PIRQC           0x62
+#define PIRQD           0x63
+#define PIRQE           0x68
+#define PIRQF           0x69
+#define PIRQG           0x6A
+#define PIRQH           0x6B
+
+#define MAX_PIRQ_NUMBER 8
+
+/**
+  Return the number of PIRQs supported by this chipset.
+
+  @param[in]  This         Pointer to LegacyInterrupt Protocol
+  @param[out] NumberPirqs  The pointer to return the max IRQ number supported
+
+  @retval EFI_SUCCESS   Max PIRQs successfully returned
+
+**/
+EFI_STATUS
+EFIAPI
+GetNumberPirqs (
+  IN  EFI_LEGACY_INTERRUPT_PROTOCOL  *This,
+  OUT UINT8                          *NumberPirqs
+  );
+
+/**
+  Return PCI location of this device.
+  $PIR table requires this info.
+
+  @param[in]   This                - Protocol instance pointer.
+  @param[out]  Bus                 - PCI Bus
+  @param[out]  Device              - PCI Device
+  @param[out]  Function            - PCI Function
+
+  @retval  EFI_SUCCESS   Bus/Device/Function returned
+
+**/
+EFI_STATUS
+EFIAPI
+GetLocation (
+  IN  EFI_LEGACY_INTERRUPT_PROTOCOL  *This,
+  OUT UINT8                          *Bus,
+  OUT UINT8                          *Device,
+  OUT UINT8                          *Function
+  );
+
+/**
+  Read the given PIRQ register
+
+  @param[in]  This        Protocol instance pointer
+  @param[in]  PirqNumber  The Pirq register 0 = A, 1 = B etc
+  @param[out] PirqData    Value read
+
+  @retval EFI_SUCCESS   Decoding change affected.
+  @retval EFI_INVALID_PARAMETER   Invalid PIRQ number
+
+**/
+EFI_STATUS
+EFIAPI
+ReadPirq (
+  IN  EFI_LEGACY_INTERRUPT_PROTOCOL  *This,
+  IN  UINT8                          PirqNumber,
+  OUT UINT8                          *PirqData
+  );
+
+/**
+  Write the given PIRQ register
+
+  @param[in]  This        Protocol instance pointer
+  @param[in]  PirqNumber  The Pirq register 0 = A, 1 = B etc
+  @param[out] PirqData    Value to write
+
+  @retval EFI_SUCCESS   Decoding change affected.
+  @retval EFI_INVALID_PARAMETER   Invalid PIRQ number
+
+**/
+EFI_STATUS
+EFIAPI
+WritePirq (
+  IN  EFI_LEGACY_INTERRUPT_PROTOCOL  *This,
+  IN  UINT8                          PirqNumber,
+  IN  UINT8                          PirqData
+  );
+
+#endif
+