MdePkg: PciExpressLib support variable size MMCONF

Add support for arbitrary sized MMCONF by introducing a new PCD.
Add a return value to point out invalid PCI addresses.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Marcello Sylvester Bauer <marcello.bauer@9elements.com>
Cc: Patrick Rudolph <patrick.rudolph@9elements.com>
Cc: Christian Walter <christian.walter@9elements.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

8 files changed, 584 insertions, 114 deletions

diff --git a/MdePkg/Include/Library/PciExpressLib.h b/MdePkg/Include/Library/PciExpressLib.h
index 826fdcf7db..d78193a0a3 100644
--- a/MdePkg/Include/Library/PciExpressLib.h
+++ b/MdePkg/Include/Library/PciExpressLib.h
@@ -2,8 +2,9 @@
   Provides services to access PCI Configuration Space using the MMIO PCI Express window.

 

   This library is identical to the PCI Library, except the access method for performing PCI

-  configuration cycles must be through the 256 MB PCI Express MMIO window whose base address

-  is defined by PcdPciExpressBaseAddress.

+  configuration cycles must be through the PCI Express MMIO window whose base address

+  is defined by PcdPciExpressBaseAddress and size defined by PcdPciExpressBaseSize.

+

 

 Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>

 SPDX-License-Identifier: BSD-2-Clause-Patent

diff --git a/MdePkg/Library/BasePciExpressLib/BasePciExpressLib.inf b/MdePkg/Library/BasePciExpressLib/BasePciExpressLib.inf
index a7edb74cde..12734b022a 100644
--- a/MdePkg/Library/BasePciExpressLib/BasePciExpressLib.inf
+++ b/MdePkg/Library/BasePciExpressLib/BasePciExpressLib.inf
@@ -1,7 +1,7 @@
 ## @file

-#  Instance of PCI Express Library using the 256 MB PCI Express MMIO window.

+#  Instance of PCI Express Library using the variable size PCI Express MMIO window.

 #

-#  PCI Express Library that uses the 256 MB PCI Express MMIO window to perform

+#  PCI Express Library that uses the variable size PCI Express MMIO window to perform

 #  PCI Configuration cycles. Layers on top of an I/O Library instance.

 #

 #  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>

@@ -38,4 +38,4 @@
 

 [Pcd]

   gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress  ## CONSUMES

-

+  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseSize  ## CONSUMES

diff --git a/MdePkg/Library/BasePciExpressLib/PciExpressLib.c b/MdePkg/Library/BasePciExpressLib/PciExpressLib.c
index 99a166c360..910dd75bb4 100644
--- a/MdePkg/Library/BasePciExpressLib/PciExpressLib.c
+++ b/MdePkg/Library/BasePciExpressLib/PciExpressLib.c
@@ -22,7 +22,8 @@
 

 /**

   Assert the validity of a PCI address. A valid PCI address should contain 1's

-  only in the low 28 bits.

+  only in the low 28 bits. PcdPciExpressBaseSize limits the size to the real

+  number of PCI busses in this segment.

 

   @param  A The address to validate.

 

@@ -80,6 +81,24 @@ GetPciExpressBaseAddress (
 }

 

 /**

+  Gets the size of PCI Express.

+

+  This internal functions retrieves PCI Express Base Size via a PCD entry

+  PcdPciExpressBaseSize.

+

+  @return The base size of PCI Express.

+

+**/

+STATIC

+UINTN

+PcdPciExpressBaseSize (

+  VOID

+  )

+{

+  return (UINTN) PcdGet64 (PcdPciExpressBaseSize);

+}

+

+/**

   Reads an 8-bit PCI configuration register.

 

   Reads and returns the 8-bit PCI configuration register specified by Address.

@@ -91,7 +110,8 @@ GetPciExpressBaseAddress (
   @param  Address The address that encodes the PCI Bus, Device, Function and

                   Register.

 

-  @return The read value from the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The read value from the PCI configuration register.

 

 **/

 UINT8

@@ -101,6 +121,9 @@ PciExpressRead8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioRead8 ((UINTN) GetPciExpressBaseAddress () + Address);

 }

 

@@ -117,7 +140,8 @@ PciExpressRead8 (
                   Register.

   @param  Value   The value to write.

 

-  @return The value written to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written to the PCI configuration register.

 

 **/

 UINT8

@@ -128,6 +152,9 @@ PciExpressWrite8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioWrite8 ((UINTN) GetPciExpressBaseAddress () + Address, Value);

 }

 

@@ -148,7 +175,8 @@ PciExpressWrite8 (
                   Register.

   @param  OrData  The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written to the PCI configuration register.

 

 **/

 UINT8

@@ -159,6 +187,9 @@ PciExpressOr8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioOr8 ((UINTN) GetPciExpressBaseAddress () + Address, OrData);

 }

 

@@ -179,7 +210,8 @@ PciExpressOr8 (
                   Register.

   @param  AndData The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -190,6 +222,9 @@ PciExpressAnd8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioAnd8 ((UINTN) GetPciExpressBaseAddress () + Address, AndData);

 }

 

@@ -212,7 +247,8 @@ PciExpressAnd8 (
   @param  AndData The value to AND with the PCI configuration register.

   @param  OrData  The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -224,6 +260,9 @@ PciExpressAndThenOr8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioAndThenOr8 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            AndData,

@@ -249,7 +288,9 @@ PciExpressAndThenOr8 (
   @param  EndBit    The ordinal of the most significant bit in the bit field.

                     Range 0..7.

 

-  @return The value of the bit field read from the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value of the bit field read from the PCI configuration

+                register.

 

 **/

 UINT8

@@ -261,6 +302,9 @@ PciExpressBitFieldRead8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldRead8 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -289,7 +333,8 @@ PciExpressBitFieldRead8 (
                     Range 0..7.

   @param  Value     The new value of the bit field.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -302,6 +347,9 @@ PciExpressBitFieldWrite8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldWrite8 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -334,7 +382,8 @@ PciExpressBitFieldWrite8 (
                     Range 0..7.

   @param  OrData    The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -347,6 +396,9 @@ PciExpressBitFieldOr8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldOr8 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -379,7 +431,8 @@ PciExpressBitFieldOr8 (
                     Range 0..7.

   @param  AndData   The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -392,6 +445,9 @@ PciExpressBitFieldAnd8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldAnd8 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -428,7 +484,8 @@ PciExpressBitFieldAnd8 (
   @param  AndData   The value to AND with the PCI configuration register.

   @param  OrData    The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -442,6 +499,9 @@ PciExpressBitFieldAndThenOr8 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldAndThenOr8 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -464,7 +524,8 @@ PciExpressBitFieldAndThenOr8 (
   @param  Address The address that encodes the PCI Bus, Device, Function and

                   Register.

 

-  @return The read value from the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The read value from the PCI configuration register.

 

 **/

 UINT16

@@ -474,6 +535,9 @@ PciExpressRead16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioRead16 ((UINTN) GetPciExpressBaseAddress () + Address);

 }

 

@@ -491,7 +555,8 @@ PciExpressRead16 (
                   Register.

   @param  Value   The value to write.

 

-  @return The value written to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written to the PCI configuration register.

 

 **/

 UINT16

@@ -502,6 +567,9 @@ PciExpressWrite16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioWrite16 ((UINTN) GetPciExpressBaseAddress () + Address, Value);

 }

 

@@ -523,7 +591,8 @@ PciExpressWrite16 (
                   Register.

   @param  OrData  The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -534,6 +603,9 @@ PciExpressOr16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioOr16 ((UINTN) GetPciExpressBaseAddress () + Address, OrData);

 }

 

@@ -555,7 +627,8 @@ PciExpressOr16 (
                   Register.

   @param  AndData The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -566,6 +639,9 @@ PciExpressAnd16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioAnd16 ((UINTN) GetPciExpressBaseAddress () + Address, AndData);

 }

 

@@ -589,7 +665,8 @@ PciExpressAnd16 (
   @param  AndData The value to AND with the PCI configuration register.

   @param  OrData  The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -601,6 +678,9 @@ PciExpressAndThenOr16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioAndThenOr16 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            AndData,

@@ -627,7 +707,9 @@ PciExpressAndThenOr16 (
   @param  EndBit    The ordinal of the most significant bit in the bit field.

                     Range 0..15.

 

-  @return The value of the bit field read from the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value of the bit field read from the PCI configuration

+                  register.

 

 **/

 UINT16

@@ -639,6 +721,9 @@ PciExpressBitFieldRead16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldRead16 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -668,7 +753,8 @@ PciExpressBitFieldRead16 (
                     Range 0..15.

   @param  Value     The new value of the bit field.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -681,6 +767,9 @@ PciExpressBitFieldWrite16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldWrite16 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -714,7 +803,8 @@ PciExpressBitFieldWrite16 (
                     Range 0..15.

   @param  OrData    The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -727,6 +817,9 @@ PciExpressBitFieldOr16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldOr16 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -760,7 +853,8 @@ PciExpressBitFieldOr16 (
                     Range 0..15.

   @param  AndData   The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -773,6 +867,9 @@ PciExpressBitFieldAnd16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldAnd16 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -810,7 +907,8 @@ PciExpressBitFieldAnd16 (
   @param  AndData   The value to AND with the PCI configuration register.

   @param  OrData    The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -824,6 +922,9 @@ PciExpressBitFieldAndThenOr16 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldAndThenOr16 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -846,7 +947,8 @@ PciExpressBitFieldAndThenOr16 (
   @param  Address The address that encodes the PCI Bus, Device, Function and

                   Register.

 

-  @return The read value from the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The read value from the PCI configuration register.

 

 **/

 UINT32

@@ -856,6 +958,9 @@ PciExpressRead32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioRead32 ((UINTN) GetPciExpressBaseAddress () + Address);

 }

 

@@ -873,7 +978,8 @@ PciExpressRead32 (
                   Register.

   @param  Value   The value to write.

 

-  @return The value written to the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value written to the PCI configuration register.

 

 **/

 UINT32

@@ -884,6 +990,9 @@ PciExpressWrite32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioWrite32 ((UINTN) GetPciExpressBaseAddress () + Address, Value);

 }

 

@@ -905,7 +1014,8 @@ PciExpressWrite32 (
                   Register.

   @param  OrData  The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -916,6 +1026,9 @@ PciExpressOr32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioOr32 ((UINTN) GetPciExpressBaseAddress () + Address, OrData);

 }

 

@@ -937,7 +1050,8 @@ PciExpressOr32 (
                   Register.

   @param  AndData The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -948,6 +1062,9 @@ PciExpressAnd32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioAnd32 ((UINTN) GetPciExpressBaseAddress () + Address, AndData);

 }

 

@@ -971,7 +1088,8 @@ PciExpressAnd32 (
   @param  AndData The value to AND with the PCI configuration register.

   @param  OrData  The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -983,6 +1101,9 @@ PciExpressAndThenOr32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioAndThenOr32 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            AndData,

@@ -1009,7 +1130,9 @@ PciExpressAndThenOr32 (
   @param  EndBit    The ordinal of the most significant bit in the bit field.

                     Range 0..31.

 

-  @return The value of the bit field read from the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value of the bit field read from the PCI

+                      configuration register.

 

 **/

 UINT32

@@ -1021,6 +1144,9 @@ PciExpressBitFieldRead32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldRead32 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -1050,7 +1176,8 @@ PciExpressBitFieldRead32 (
                     Range 0..31.

   @param  Value     The new value of the bit field.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1063,6 +1190,9 @@ PciExpressBitFieldWrite32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldWrite32 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -1096,7 +1226,8 @@ PciExpressBitFieldWrite32 (
                     Range 0..31.

   @param  OrData    The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1109,6 +1240,9 @@ PciExpressBitFieldOr32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldOr32 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -1142,7 +1276,8 @@ PciExpressBitFieldOr32 (
                     Range 0..31.

   @param  AndData   The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1155,6 +1290,9 @@ PciExpressBitFieldAnd32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldAnd32 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -1192,7 +1330,8 @@ PciExpressBitFieldAnd32 (
   @param  AndData   The value to AND with the PCI configuration register.

   @param  OrData    The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF  Invalid PCI address.

+  @retval other       The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1206,6 +1345,9 @@ PciExpressBitFieldAndThenOr32 (
   )

 {

   ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= PcdPciExpressBaseSize()) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldAndThenOr32 (

            (UINTN) GetPciExpressBaseAddress () + Address,

            StartBit,

@@ -1235,7 +1377,8 @@ PciExpressBitFieldAndThenOr32 (
   @param  Size          The size in bytes of the transfer.

   @param  Buffer        The pointer to a buffer receiving the data read.

 

-  @return Size read data from StartAddress.

+  @retval (UINTN)-1  Invalid PCI address.

+  @retval other      Size read data from StartAddress.

 

 **/

 UINTN

@@ -1249,6 +1392,9 @@ PciExpressReadBuffer (
   UINTN   ReturnValue;

 

   ASSERT_INVALID_PCI_ADDRESS (StartAddress);

+  if (StartAddress >= PcdPciExpressBaseSize()) {

+    return (UINTN) -1;

+  }

   ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);

 

   if (Size == 0) {

@@ -1335,7 +1481,8 @@ PciExpressReadBuffer (
   @param  Size          The size in bytes of the transfer.

   @param  Buffer        The pointer to a buffer containing the data to write.

 

-  @return Size written to StartAddress.

+  @retval (UINTN)-1  Invalid PCI address.

+  @retval other      Size written to StartAddress.

 

 **/

 UINTN

@@ -1349,6 +1496,9 @@ PciExpressWriteBuffer (
   UINTN                             ReturnValue;

 

   ASSERT_INVALID_PCI_ADDRESS (StartAddress);

+  if (StartAddress >= PcdPciExpressBaseSize()) {

+    return (UINTN) -1;

+  }

   ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);

 

   if (Size == 0) {

diff --git a/MdePkg/Library/DxeRuntimePciExpressLib/DxeRuntimePciExpressLib.inf b/MdePkg/Library/DxeRuntimePciExpressLib/DxeRuntimePciExpressLib.inf
index 8d2ba1d187..26a59bda19 100644
--- a/MdePkg/Library/DxeRuntimePciExpressLib/DxeRuntimePciExpressLib.inf
+++ b/MdePkg/Library/DxeRuntimePciExpressLib/DxeRuntimePciExpressLib.inf
@@ -47,3 +47,4 @@
 

 [Pcd]

   gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress  ## CONSUMES

+  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseSize  ## CONSUMES

diff --git a/MdePkg/Library/DxeRuntimePciExpressLib/PciExpressLib.c b/MdePkg/Library/DxeRuntimePciExpressLib/PciExpressLib.c
index b899543510..cb80725c5f 100644
--- a/MdePkg/Library/DxeRuntimePciExpressLib/PciExpressLib.c
+++ b/MdePkg/Library/DxeRuntimePciExpressLib/PciExpressLib.c
@@ -25,6 +25,16 @@
 #include <Library/DxeServicesTableLib.h>

 #include <Library/UefiRuntimeLib.h>

 

+/**

+ Assert the validity of a PCI address. A valid PCI address should contain 1's

+ only in the low 28 bits.

+

+ @param A The address to validate.

+

+**/

+#define ASSERT_INVALID_PCI_ADDRESS(A) \

+ ASSERT (((A) & ~0xfffffff) == 0)

+

 ///

 /// Define table for mapping PCI Express MMIO physical addresses to virtual addresses at OS runtime

 ///

@@ -39,9 +49,10 @@ typedef struct {
 EFI_EVENT                               mDxeRuntimePciExpressLibVirtualNotifyEvent = NULL;

 

 ///

-/// Module global that contains the base physical address of the PCI Express MMIO range.

+/// Module global that contains the base physical address and size of the PCI Express MMIO range.

 ///

 UINTN                                   mDxeRuntimePciExpressLibPciExpressBaseAddress = 0;

+UINTN                                   mDxeRuntimePciExpressLibPciExpressBaseSize = 0;

 

 ///

 /// The number of PCI devices that have been registered for runtime access.

@@ -120,6 +131,7 @@ DxeRuntimePciExpressLibConstructor (
   // Cache the physical address of the PCI Express MMIO range into a module global variable

   //

   mDxeRuntimePciExpressLibPciExpressBaseAddress = (UINTN) PcdGet64 (PcdPciExpressBaseAddress);

+  mDxeRuntimePciExpressLibPciExpressBaseSize = (UINTN) PcdGet64 (PcdPciExpressBaseSize);

 

   //

   // Register SetVirtualAddressMap () notify function

@@ -179,8 +191,12 @@ DxeRuntimePciExpressLibDestructor (
   This internal functions retrieves PCI Express Base Address via a PCD entry

   PcdPciExpressBaseAddress.

 

-  @param  Address  The address that encodes the PCI Bus, Device, Function and Register.

-  @return          The base address of PCI Express.

+  If Address > 0x0FFFFFFF, then ASSERT().

+

+  @param  Address   The address that encodes the PCI Bus, Device, Function and Register.

+

+  @retval (UINTN)-1 Invalid PCI address.

+  @retval other     The base address of PCI Express.

 

 **/

 UINTN

@@ -193,7 +209,14 @@ GetPciExpressAddress (
   //

   // Make sure Address is valid

   //

-  ASSERT (((Address) & ~0xfffffff) == 0);

+  ASSERT_INVALID_PCI_ADDRESS (Address);

+

+  //

+  // Make sure the Address is in MMCONF address space

+  //

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINTN) -1;

+  }

 

   //

   // Convert Address to a physical address in the MMIO PCI Express range

@@ -236,7 +259,6 @@ GetPciExpressAddress (
   //

   // No match was found.  This is a critical error at OS runtime, so ASSERT() and force a breakpoint.

   //

-  ASSERT (FALSE);

   CpuBreakpoint();

 

   //

@@ -288,7 +310,14 @@ PciExpressRegisterForRuntimeAccess (
   //

   // Make sure Address is valid

   //

-  ASSERT (((Address) & ~0xfffffff) == 0);

+ ASSERT_INVALID_PCI_ADDRESS (Address);

+

+  //

+  // Make sure the Address is in MMCONF address space

+  //

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return RETURN_UNSUPPORTED;

+  }

 

   //

   // Convert Address to a physical address in the MMIO PCI Express range

@@ -354,8 +383,8 @@ PciExpressRegisterForRuntimeAccess (
 

   @param  Address The address that encodes the PCI Bus, Device, Function and

                   Register.

-

-  @return The read value from the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The read value from the PCI configuration register.

 

 **/

 UINT8

@@ -364,6 +393,10 @@ PciExpressRead8 (
   IN      UINTN                     Address

   )

 {

+  ASSERT_INVALID_PCI_ADDRESS (Address);

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioRead8 (GetPciExpressAddress (Address));

 }

 

@@ -380,7 +413,8 @@ PciExpressRead8 (
                   Register.

   @param  Value   The value to write.

 

-  @return The value written to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written to the PCI configuration register.

 

 **/

 UINT8

@@ -390,6 +424,9 @@ PciExpressWrite8 (
   IN      UINT8                     Value

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioWrite8 (GetPciExpressAddress (Address), Value);

 }

 

@@ -410,7 +447,8 @@ PciExpressWrite8 (
                   Register.

   @param  OrData  The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -420,6 +458,9 @@ PciExpressOr8 (
   IN      UINT8                     OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioOr8 (GetPciExpressAddress (Address), OrData);

 }

 

@@ -440,7 +481,8 @@ PciExpressOr8 (
                   Register.

   @param  AndData The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other  The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -450,6 +492,9 @@ PciExpressAnd8 (
   IN      UINT8                     AndData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioAnd8 (GetPciExpressAddress (Address), AndData);

 }

 

@@ -472,7 +517,8 @@ PciExpressAnd8 (
   @param  AndData The value to AND with the PCI configuration register.

   @param  OrData  The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -483,6 +529,9 @@ PciExpressAndThenOr8 (
   IN      UINT8                     OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioAndThenOr8 (

            GetPciExpressAddress (Address),

            AndData,

@@ -508,7 +557,8 @@ PciExpressAndThenOr8 (
   @param  EndBit    The ordinal of the most significant bit in the bit field.

                     Range 0..7.

 

-  @return The value of the bit field read from the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value of the bit field read from the PCI configuration register.

 

 **/

 UINT8

@@ -519,6 +569,9 @@ PciExpressBitFieldRead8 (
   IN      UINTN                     EndBit

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldRead8 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -547,7 +600,8 @@ PciExpressBitFieldRead8 (
                     Range 0..7.

   @param  Value     The new value of the bit field.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -559,6 +613,9 @@ PciExpressBitFieldWrite8 (
   IN      UINT8                     Value

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldWrite8 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -591,7 +648,8 @@ PciExpressBitFieldWrite8 (
                     Range 0..7.

   @param  OrData    The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -603,6 +661,9 @@ PciExpressBitFieldOr8 (
   IN      UINT8                     OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldOr8 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -635,7 +696,8 @@ PciExpressBitFieldOr8 (
                     Range 0..7.

   @param  AndData   The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -647,6 +709,9 @@ PciExpressBitFieldAnd8 (
   IN      UINT8                     AndData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldAnd8 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -683,7 +748,8 @@ PciExpressBitFieldAnd8 (
   @param  AndData   The value to AND with the PCI configuration register.

   @param  OrData    The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFF  Invalid PCI address.

+  @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -696,6 +762,9 @@ PciExpressBitFieldAndThenOr8 (
   IN      UINT8                     OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT8) -1;

+  }

   return MmioBitFieldAndThenOr8 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -718,7 +787,8 @@ PciExpressBitFieldAndThenOr8 (
   @param  Address The address that encodes the PCI Bus, Device, Function and

                   Register.

 

-  @return The read value from the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The read value from the PCI configuration register.

 

 **/

 UINT16

@@ -727,6 +797,9 @@ PciExpressRead16 (
   IN      UINTN                     Address

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioRead16 (GetPciExpressAddress (Address));

 }

 

@@ -744,7 +817,8 @@ PciExpressRead16 (
                   Register.

   @param  Value   The value to write.

 

-  @return The value written to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written to the PCI configuration register.

 

 **/

 UINT16

@@ -754,6 +828,9 @@ PciExpressWrite16 (
   IN      UINT16                    Value

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioWrite16 (GetPciExpressAddress (Address), Value);

 }

 

@@ -775,7 +852,8 @@ PciExpressWrite16 (
                   Register.

   @param  OrData  The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -785,6 +863,9 @@ PciExpressOr16 (
   IN      UINT16                    OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioOr16 (GetPciExpressAddress (Address), OrData);

 }

 

@@ -806,7 +887,8 @@ PciExpressOr16 (
                   Register.

   @param  AndData The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -816,6 +898,9 @@ PciExpressAnd16 (
   IN      UINT16                    AndData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioAnd16 (GetPciExpressAddress (Address), AndData);

 }

 

@@ -839,7 +924,8 @@ PciExpressAnd16 (
   @param  AndData The value to AND with the PCI configuration register.

   @param  OrData  The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -850,6 +936,9 @@ PciExpressAndThenOr16 (
   IN      UINT16                    OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioAndThenOr16 (

            GetPciExpressAddress (Address),

            AndData,

@@ -876,7 +965,8 @@ PciExpressAndThenOr16 (
   @param  EndBit    The ordinal of the most significant bit in the bit field.

                     Range 0..15.

 

-  @return The value of the bit field read from the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value of the bit field read from the PCI configuration register.

 

 **/

 UINT16

@@ -887,6 +977,9 @@ PciExpressBitFieldRead16 (
   IN      UINTN                     EndBit

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldRead16 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -916,7 +1009,8 @@ PciExpressBitFieldRead16 (
                     Range 0..15.

   @param  Value     The new value of the bit field.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -928,6 +1022,9 @@ PciExpressBitFieldWrite16 (
   IN      UINT16                    Value

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldWrite16 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -961,7 +1058,8 @@ PciExpressBitFieldWrite16 (
                     Range 0..15.

   @param  OrData    The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -973,6 +1071,9 @@ PciExpressBitFieldOr16 (
   IN      UINT16                    OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldOr16 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -1006,7 +1107,8 @@ PciExpressBitFieldOr16 (
                     Range 0..15.

   @param  AndData   The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -1018,6 +1120,9 @@ PciExpressBitFieldAnd16 (
   IN      UINT16                    AndData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldAnd16 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -1055,7 +1160,8 @@ PciExpressBitFieldAnd16 (
   @param  AndData   The value to AND with the PCI configuration register.

   @param  OrData    The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -1068,6 +1174,9 @@ PciExpressBitFieldAndThenOr16 (
   IN      UINT16                    OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT16) -1;

+  }

   return MmioBitFieldAndThenOr16 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -1090,7 +1199,8 @@ PciExpressBitFieldAndThenOr16 (
   @param  Address The address that encodes the PCI Bus, Device, Function and

                   Register.

 

-  @return The read value from the PCI configuration register.

+  @retval 0xFFFF  Invalid PCI address.

+  @retval other   The read value from the PCI configuration register.

 

 **/

 UINT32

@@ -1099,6 +1209,9 @@ PciExpressRead32 (
   IN      UINTN                     Address

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioRead32 (GetPciExpressAddress (Address));

 }

 

@@ -1116,7 +1229,8 @@ PciExpressRead32 (
                   Register.

   @param  Value   The value to write.

 

-  @return The value written to the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value written to the PCI configuration register.

 

 **/

 UINT32

@@ -1126,6 +1240,9 @@ PciExpressWrite32 (
   IN      UINT32                    Value

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioWrite32 (GetPciExpressAddress (Address), Value);

 }

 

@@ -1147,7 +1264,8 @@ PciExpressWrite32 (
                   Register.

   @param  OrData  The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1157,6 +1275,9 @@ PciExpressOr32 (
   IN      UINT32                    OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioOr32 (GetPciExpressAddress (Address), OrData);

 }

 

@@ -1178,7 +1299,8 @@ PciExpressOr32 (
                   Register.

   @param  AndData The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1188,6 +1310,9 @@ PciExpressAnd32 (
   IN      UINT32                    AndData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioAnd32 (GetPciExpressAddress (Address), AndData);

 }

 

@@ -1211,7 +1336,8 @@ PciExpressAnd32 (
   @param  AndData The value to AND with the PCI configuration register.

   @param  OrData  The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1222,6 +1348,9 @@ PciExpressAndThenOr32 (
   IN      UINT32                    OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioAndThenOr32 (

            GetPciExpressAddress (Address),

            AndData,

@@ -1248,7 +1377,8 @@ PciExpressAndThenOr32 (
   @param  EndBit    The ordinal of the most significant bit in the bit field.

                     Range 0..31.

 

-  @return The value of the bit field read from the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value of the bit field read from the PCI configuration register.

 

 **/

 UINT32

@@ -1259,6 +1389,9 @@ PciExpressBitFieldRead32 (
   IN      UINTN                     EndBit

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldRead32 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -1288,7 +1421,8 @@ PciExpressBitFieldRead32 (
                     Range 0..31.

   @param  Value     The new value of the bit field.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1300,6 +1434,9 @@ PciExpressBitFieldWrite32 (
   IN      UINT32                    Value

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldWrite32 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -1333,7 +1470,8 @@ PciExpressBitFieldWrite32 (
                     Range 0..31.

   @param  OrData    The value to OR with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1345,6 +1483,9 @@ PciExpressBitFieldOr32 (
   IN      UINT32                    OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldOr32 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -1378,7 +1519,8 @@ PciExpressBitFieldOr32 (
                     Range 0..31.

   @param  AndData   The value to AND with the PCI configuration register.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1390,6 +1532,9 @@ PciExpressBitFieldAnd32 (
   IN      UINT32                    AndData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldAnd32 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -1427,7 +1572,8 @@ PciExpressBitFieldAnd32 (
   @param  AndData   The value to AND with the PCI configuration register.

   @param  OrData    The value to OR with the result of the AND operation.

 

-  @return The value written back to the PCI configuration register.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1440,6 +1586,9 @@ PciExpressBitFieldAndThenOr32 (
   IN      UINT32                    OrData

   )

 {

+  if (Address >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINT32) -1;

+  }

   return MmioBitFieldAndThenOr32 (

            GetPciExpressAddress (Address),

            StartBit,

@@ -1469,7 +1618,8 @@ PciExpressBitFieldAndThenOr32 (
   @param  Size          The size in bytes of the transfer.

   @param  Buffer        The pointer to a buffer receiving the data read.

 

-  @return Size read data from StartAddress.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      Size read data from StartAddress.

 

 **/

 UINTN

@@ -1485,9 +1635,16 @@ PciExpressReadBuffer (
   //

   // Make sure Address is valid

   //

-  ASSERT (((StartAddress) & ~0xfffffff) == 0);

+  ASSERT_INVALID_PCI_ADDRESS (StartAddress);

   ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);

 

+  //

+  // Make sure the Address is in MMCONF address space

+  //

+  if (StartAddress >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINTN) -1;

+  }

+

   if (Size == 0) {

     return Size;

   }

@@ -1572,7 +1729,8 @@ PciExpressReadBuffer (
   @param  Size          The size in bytes of the transfer.

   @param  Buffer        The pointer to a buffer containing the data to write.

 

-  @return Size written to StartAddress.

+  @retval 0xFFFFFFFF Invalid PCI address.

+  @retval other      Size written to StartAddress.

 

 **/

 UINTN

@@ -1588,9 +1746,16 @@ PciExpressWriteBuffer (
   //

   // Make sure Address is valid

   //

-  ASSERT (((StartAddress) & ~0xfffffff) == 0);

+  ASSERT_INVALID_PCI_ADDRESS (StartAddress);

   ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);

 

+  //

+  // Make sure the Address is in MMCONF address space

+  //

+  if (StartAddress >= mDxeRuntimePciExpressLibPciExpressBaseSize) {

+    return (UINTN) -1;

+  }

+

   if (Size == 0) {

     return 0;

   }

diff --git a/MdePkg/Library/SmmPciExpressLib/PciExpressLib.c b/MdePkg/Library/SmmPciExpressLib/PciExpressLib.c
index 35b9f775a8..97bd32c8d2 100644
--- a/MdePkg/Library/SmmPciExpressLib/PciExpressLib.c
+++ b/MdePkg/Library/SmmPciExpressLib/PciExpressLib.c
@@ -20,9 +20,10 @@
 #include <Library/PcdLib.h>

 

 ///

-/// Module global that contains the base physical address of the PCI Express MMIO range.

+/// Module global that contains the base physical address and size of the PCI Express MMIO range.

 ///

 UINTN mSmmPciExpressLibPciExpressBaseAddress = 0;

+UINTN mSmmPciExpressLibPciExpressBaseSize = 0;

 

 /**

  The constructor function caches the PCI Express Base Address

@@ -40,9 +41,10 @@ SmmPciExpressLibConstructor (
  )

 {

  //

- // Cache the physical address of the PCI Express MMIO range into a module global variable

+ // Cache the physical address and size of the PCI Express MMIO range into a module global variable

  //

  mSmmPciExpressLibPciExpressBaseAddress = (UINTN) PcdGet64 (PcdPciExpressBaseAddress);

+ mSmmPciExpressLibPciExpressBaseSize = (UINTN) PcdGet64 (PcdPciExpressBaseSize);

 

  return EFI_SUCCESS;

 }

@@ -97,8 +99,12 @@ PciExpressRegisterForRuntimeAccess (
  mSmmPciExpressLibPciExpressBaseAddress is initialized in the library constructor from PCD entry

  PcdPciExpressBaseAddress.

 

+ If Address > 0x0FFFFFFF, then ASSERT().

+

  @param Address The address that encodes the PCI Bus, Device, Function and Register.

- @return MMIO address corresponding to Address.

+

+ @retval (UINTN)-1 Invalid PCI address.

+ @retval other     MMIO address corresponding to Address.

 

 **/

 UINTN

@@ -110,6 +116,12 @@ GetPciExpressAddress (
  // Make sure Address is valid

  //

  ASSERT_INVALID_PCI_ADDRESS (Address);

+ //

+ // Make sure the Address is in MMCONF address space

+ //

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINTN) -1;

+ }

  return mSmmPciExpressLibPciExpressBaseAddress + Address;

 }

 

@@ -125,7 +137,8 @@ GetPciExpressAddress (
  @param Address The address that encodes the PCI Bus, Device, Function and

  Register.

 

- @return The read value from the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The read value from the PCI configuration register.

 

 **/

 UINT8

@@ -134,6 +147,9 @@ PciExpressRead8 (
  IN UINTN Address

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioRead8 (GetPciExpressAddress (Address));

 }

 

@@ -150,7 +166,8 @@ PciExpressRead8 (
  Register.

  @param Value The value to write.

 

- @return The value written to the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value written to the PCI configuration register.

 

 **/

 UINT8

@@ -160,6 +177,9 @@ PciExpressWrite8 (
  IN UINT8 Value

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioWrite8 (GetPciExpressAddress (Address), Value);

 }

 

@@ -180,7 +200,8 @@ PciExpressWrite8 (
  Register.

  @param OrData The value to OR with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -190,6 +211,9 @@ PciExpressOr8 (
  IN UINT8 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioOr8 (GetPciExpressAddress (Address), OrData);

 }

 

@@ -210,7 +234,8 @@ PciExpressOr8 (
  Register.

  @param AndData The value to AND with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -220,6 +245,9 @@ PciExpressAnd8 (
  IN UINT8 AndData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioAnd8 (GetPciExpressAddress (Address), AndData);

 }

 

@@ -242,7 +270,8 @@ PciExpressAnd8 (
  @param AndData The value to AND with the PCI configuration register.

  @param OrData The value to OR with the result of the AND operation.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -253,6 +282,9 @@ PciExpressAndThenOr8 (
  IN UINT8 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioAndThenOr8 (

  GetPciExpressAddress (Address),

  AndData,

@@ -278,7 +310,8 @@ PciExpressAndThenOr8 (
  @param EndBit The ordinal of the most significant bit in the bit field.

  Range 0..7.

 

- @return The value of the bit field read from the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value of the bit field read from the PCI configuration register.

 

 **/

 UINT8

@@ -289,6 +322,9 @@ PciExpressBitFieldRead8 (
  IN UINTN EndBit

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioBitFieldRead8 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -317,7 +353,8 @@ PciExpressBitFieldRead8 (
  Range 0..7.

  @param Value The new value of the bit field.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -329,6 +366,9 @@ PciExpressBitFieldWrite8 (
  IN UINT8 Value

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioBitFieldWrite8 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -361,7 +401,8 @@ PciExpressBitFieldWrite8 (
  Range 0..7.

  @param OrData The value to OR with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -373,6 +414,9 @@ PciExpressBitFieldOr8 (
  IN UINT8 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioBitFieldOr8 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -405,7 +449,8 @@ PciExpressBitFieldOr8 (
  Range 0..7.

  @param AndData The value to AND with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -417,6 +462,9 @@ PciExpressBitFieldAnd8 (
  IN UINT8 AndData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioBitFieldAnd8 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -453,7 +501,8 @@ PciExpressBitFieldAnd8 (
  @param AndData The value to AND with the PCI configuration register.

  @param OrData The value to OR with the result of the AND operation.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The value written back to the PCI configuration register.

 

 **/

 UINT8

@@ -466,6 +515,9 @@ PciExpressBitFieldAndThenOr8 (
  IN UINT8 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT8) -1;

+ }

  return MmioBitFieldAndThenOr8 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -488,7 +540,8 @@ PciExpressBitFieldAndThenOr8 (
  @param Address The address that encodes the PCI Bus, Device, Function and

  Register.

 

- @return The read value from the PCI configuration register.

+ @retval 0xFF  Invalid PCI address.

+ @retval other The read value from the PCI configuration register.

 

 **/

 UINT16

@@ -497,6 +550,9 @@ PciExpressRead16 (
  IN UINTN Address

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioRead16 (GetPciExpressAddress (Address));

 }

 

@@ -514,7 +570,8 @@ PciExpressRead16 (
  Register.

  @param Value The value to write.

 

- @return The value written to the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value written to the PCI configuration register.

 

 **/

 UINT16

@@ -524,6 +581,9 @@ PciExpressWrite16 (
  IN UINT16 Value

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioWrite16 (GetPciExpressAddress (Address), Value);

 }

 

@@ -545,7 +605,8 @@ PciExpressWrite16 (
  Register.

  @param OrData The value to OR with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -555,6 +616,9 @@ PciExpressOr16 (
  IN UINT16 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioOr16 (GetPciExpressAddress (Address), OrData);

 }

 

@@ -576,7 +640,8 @@ PciExpressOr16 (
  Register.

  @param AndData The value to AND with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -586,6 +651,9 @@ PciExpressAnd16 (
  IN UINT16 AndData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioAnd16 (GetPciExpressAddress (Address), AndData);

 }

 

@@ -609,7 +677,8 @@ PciExpressAnd16 (
  @param AndData The value to AND with the PCI configuration register.

  @param OrData The value to OR with the result of the AND operation.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -620,6 +689,9 @@ PciExpressAndThenOr16 (
  IN UINT16 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioAndThenOr16 (

  GetPciExpressAddress (Address),

  AndData,

@@ -646,7 +718,8 @@ PciExpressAndThenOr16 (
  @param EndBit The ordinal of the most significant bit in the bit field.

  Range 0..15.

 

- @return The value of the bit field read from the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value of the bit field read from the PCI configuration register.

 

 **/

 UINT16

@@ -657,6 +730,9 @@ PciExpressBitFieldRead16 (
  IN UINTN EndBit

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioBitFieldRead16 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -686,7 +762,8 @@ PciExpressBitFieldRead16 (
  Range 0..15.

  @param Value The new value of the bit field.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -698,6 +775,9 @@ PciExpressBitFieldWrite16 (
  IN UINT16 Value

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioBitFieldWrite16 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -731,7 +811,8 @@ PciExpressBitFieldWrite16 (
  Range 0..15.

  @param OrData The value to OR with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -743,6 +824,9 @@ PciExpressBitFieldOr16 (
  IN UINT16 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioBitFieldOr16 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -776,7 +860,8 @@ PciExpressBitFieldOr16 (
  Range 0..15.

  @param AndData The value to AND with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -788,6 +873,9 @@ PciExpressBitFieldAnd16 (
  IN UINT16 AndData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioBitFieldAnd16 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -825,7 +913,8 @@ PciExpressBitFieldAnd16 (
  @param AndData The value to AND with the PCI configuration register.

  @param OrData The value to OR with the result of the AND operation.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFF  Invalid PCI address.

+ @retval other   The value written back to the PCI configuration register.

 

 **/

 UINT16

@@ -838,6 +927,9 @@ PciExpressBitFieldAndThenOr16 (
  IN UINT16 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT16) -1;

+ }

  return MmioBitFieldAndThenOr16 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -860,7 +952,8 @@ PciExpressBitFieldAndThenOr16 (
  @param Address The address that encodes the PCI Bus, Device, Function and

  Register.

 

- @return The read value from the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The read value from the PCI configuration register.

 

 **/

 UINT32

@@ -869,6 +962,9 @@ PciExpressRead32 (
  IN UINTN Address

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioRead32 (GetPciExpressAddress (Address));

 }

 

@@ -886,7 +982,8 @@ PciExpressRead32 (
  Register.

  @param Value The value to write.

 

- @return The value written to the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value written to the PCI configuration register.

 

 **/

 UINT32

@@ -896,6 +993,9 @@ PciExpressWrite32 (
  IN UINT32 Value

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioWrite32 (GetPciExpressAddress (Address), Value);

 }

 

@@ -917,7 +1017,8 @@ PciExpressWrite32 (
  Register.

  @param OrData The value to OR with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -927,6 +1028,9 @@ PciExpressOr32 (
  IN UINT32 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioOr32 (GetPciExpressAddress (Address), OrData);

 }

 

@@ -948,7 +1052,8 @@ PciExpressOr32 (
  Register.

  @param AndData The value to AND with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -958,6 +1063,9 @@ PciExpressAnd32 (
  IN UINT32 AndData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioAnd32 (GetPciExpressAddress (Address), AndData);

 }

 

@@ -981,7 +1089,8 @@ PciExpressAnd32 (
  @param AndData The value to AND with the PCI configuration register.

  @param OrData The value to OR with the result of the AND operation.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -992,6 +1101,9 @@ PciExpressAndThenOr32 (
  IN UINT32 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioAndThenOr32 (

  GetPciExpressAddress (Address),

  AndData,

@@ -1018,7 +1130,8 @@ PciExpressAndThenOr32 (
  @param EndBit The ordinal of the most significant bit in the bit field.

  Range 0..31.

 

- @return The value of the bit field read from the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value of the bit field read from the PCI configuration register.

 

 **/

 UINT32

@@ -1029,6 +1142,9 @@ PciExpressBitFieldRead32 (
  IN UINTN EndBit

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioBitFieldRead32 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -1058,7 +1174,8 @@ PciExpressBitFieldRead32 (
  Range 0..31.

  @param Value The new value of the bit field.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1070,6 +1187,9 @@ PciExpressBitFieldWrite32 (
  IN UINT32 Value

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioBitFieldWrite32 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -1103,7 +1223,8 @@ PciExpressBitFieldWrite32 (
  Range 0..31.

  @param OrData The value to OR with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1115,6 +1236,9 @@ PciExpressBitFieldOr32 (
  IN UINT32 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioBitFieldOr32 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -1148,7 +1272,8 @@ PciExpressBitFieldOr32 (
  Range 0..31.

  @param AndData The value to AND with the PCI configuration register.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1160,6 +1285,9 @@ PciExpressBitFieldAnd32 (
  IN UINT32 AndData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioBitFieldAnd32 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -1197,7 +1325,8 @@ PciExpressBitFieldAnd32 (
  @param AndData The value to AND with the PCI configuration register.

  @param OrData The value to OR with the result of the AND operation.

 

- @return The value written back to the PCI configuration register.

+ @retval 0xFFFFFFFF Invalid PCI address.

+ @retval other      The value written back to the PCI configuration register.

 

 **/

 UINT32

@@ -1210,6 +1339,9 @@ PciExpressBitFieldAndThenOr32 (
  IN UINT32 OrData

  )

 {

+ if (Address >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINT32) -1;

+ }

  return MmioBitFieldAndThenOr32 (

  GetPciExpressAddress (Address),

  StartBit,

@@ -1239,7 +1371,8 @@ PciExpressBitFieldAndThenOr32 (
  @param Size The size in bytes of the transfer.

  @param Buffer The pointer to a buffer receiving the data read.

 

- @return Size read data from StartAddress.

+ @retval (UINTN)-1 Invalid PCI address.

+ @retval other     Size read data from StartAddress.

 

 **/

 UINTN

@@ -1258,6 +1391,13 @@ PciExpressReadBuffer (
  ASSERT_INVALID_PCI_ADDRESS (StartAddress);

  ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);

 

+ //

+ // Make sure the Address is in MMCONF address space

+ //

+ if (StartAddress >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINTN) -1;

+ }

+

  if (Size == 0) {

  return Size;

  }

@@ -1342,7 +1482,8 @@ PciExpressReadBuffer (
  @param Size The size in bytes of the transfer.

  @param Buffer The pointer to a buffer containing the data to write.

 

- @return Size written to StartAddress.

+ @retval (UINTN)-1 Invalid PCI address.

+ @retval other     Size written to StartAddress.

 

 **/

 UINTN

@@ -1361,6 +1502,13 @@ PciExpressWriteBuffer (
  ASSERT_INVALID_PCI_ADDRESS (StartAddress);

  ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);

 

+ //

+ // Make sure the Address is in MMCONF address space

+ //

+ if (StartAddress >= mSmmPciExpressLibPciExpressBaseSize) {

+   return (UINTN) -1;

+ }

+

 

  if (Size == 0) {

  return 0;

diff --git a/MdePkg/Library/SmmPciExpressLib/SmmPciExpressLib.inf b/MdePkg/Library/SmmPciExpressLib/SmmPciExpressLib.inf
index 729f6a3083..78cab6352f 100644
--- a/MdePkg/Library/SmmPciExpressLib/SmmPciExpressLib.inf
+++ b/MdePkg/Library/SmmPciExpressLib/SmmPciExpressLib.inf
@@ -35,3 +35,4 @@
 

 [Pcd]

  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress ## CONSUMES

+ gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseSize  ## CONSUMES

diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index 73f6c24073..812be75fb3 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -2274,6 +2274,10 @@
   # @Prompt PCI Express Base Address.

   gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress|0xE0000000|UINT64|0x0000000a

 

+  ## This value is used to set the size of PCI express hierarchy. The default is 256 MB.

+  # @Prompt PCI Express Base Size.

+  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseSize|0x10000000|UINT64|0x0000000f

+

   ## Default current ISO 639-2 language: English & French.

   # @Prompt Default Value of LangCodes Variable.

   gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultLangCodes|"engfraengfra"|VOID*|0x0000001c