X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdePkg%2FInclude%2FLibrary%2FPciExpressLib.h;h=06deb65207e5a2029cdebbf92d6de837f2f368be;hb=HEAD;hp=a3c3ddae78421d3e868b24f31c51b63bcb3add43;hpb=57542665705a63460d993697966cbe254d844c19;p=mirror_edk2.git diff --git a/MdePkg/Include/Library/PciExpressLib.h b/MdePkg/Include/Library/PciExpressLib.h index a3c3ddae78..06deb65207 100644 --- a/MdePkg/Include/Library/PciExpressLib.h +++ b/MdePkg/Include/Library/PciExpressLib.h @@ -1,20 +1,21 @@ /** @file - Pci Express Library Services for PCI Segment #0 + Provides services to access PCI Configuration Space using the MMIO PCI Express window. - Copyright (c) 2006 - 2008, Intel Corporation - All rights reserved. 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 + This library is identical to the PCI Library, except the access method for performing PCI + configuration cycles must be through the PCI Express MMIO window whose base address + is defined by PcdPciExpressBaseAddress and size defined by PcdPciExpressBaseSize. - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
+SPDX-License-Identifier: BSD-2-Clause-Patent **/ #ifndef __PCI_EXPRESS_LIB_H__ #define __PCI_EXPRESS_LIB_H__ +#include + /** Macro that converts PCI Bus, PCI Device, PCI Function and PCI Register to an address that can be passed to the PCI Library functions. @@ -31,8 +32,35 @@ @return The encode PCI address. **/ -#define PCI_EXPRESS_LIB_ADDRESS(Bus,Device,Function,Offset) \ - (((Offset) & 0xfff) | (((Function) & 0x07) << 12) | (((Device) & 0x1f) << 15) | (((Bus) & 0xff) << 20)) +#define PCI_EXPRESS_LIB_ADDRESS(Bus, Device, Function, Offset) PCI_ECAM_ADDRESS ((Bus), (Device), (Function), (Offset)) + +/** + Registers a PCI device so PCI configuration registers may be accessed after + SetVirtualAddressMap(). + + Registers the PCI device specified by Address so all the PCI configuration + registers associated with that PCI device may be accessed after SetVirtualAddressMap() + is called. + + If Address > 0x0FFFFFFF, then ASSERT(). + + @param Address Address that encodes the PCI Bus, Device, Function and + Register. + + @retval RETURN_SUCCESS The PCI device was registered for runtime access. + @retval RETURN_UNSUPPORTED An attempt was made to call this function + after ExitBootServices(). + @retval RETURN_UNSUPPORTED The resources required to access the PCI device + at runtime could not be mapped. + @retval RETURN_OUT_OF_RESOURCES There are not enough resources available to + complete the registration. + +**/ +RETURN_STATUS +EFIAPI +PciExpressRegisterForRuntimeAccess ( + IN UINTN Address + ); /** Reads an 8-bit PCI configuration register. @@ -52,7 +80,7 @@ UINT8 EFIAPI PciExpressRead8 ( - IN UINTN Address + IN UINTN Address ); /** @@ -74,16 +102,16 @@ PciExpressRead8 ( UINT8 EFIAPI PciExpressWrite8 ( - IN UINTN Address, - IN UINT8 Value + IN UINTN Address, + IN UINT8 Value ); /** - Performs a bitwise inclusive OR of an 8-bit PCI configuration register with + Performs a bitwise OR of an 8-bit PCI configuration register with an 8-bit value. Reads the 8-bit PCI configuration register specified by Address, performs a - bitwise inclusive OR between the read result and the value specified by + bitwise OR between the read result and the value specified by OrData, and writes the result to the 8-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI read and write operations @@ -101,8 +129,8 @@ PciExpressWrite8 ( UINT8 EFIAPI PciExpressOr8 ( - IN UINTN Address, - IN UINT8 OrData + IN UINTN Address, + IN UINT8 OrData ); /** @@ -128,17 +156,17 @@ PciExpressOr8 ( UINT8 EFIAPI PciExpressAnd8 ( - IN UINTN Address, - IN UINT8 AndData + IN UINTN Address, + IN UINT8 AndData ); /** Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit - value, followed a bitwise inclusive OR with another 8-bit value. + value, followed a bitwise OR with another 8-bit value. Reads the 8-bit PCI configuration register specified by Address, performs a bitwise AND between the read result and the value specified by AndData, - performs a bitwise inclusive OR between the result of the AND operation and + performs a bitwise OR between the result of the AND operation and the value specified by OrData, and writes the result to the 8-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI @@ -157,9 +185,9 @@ PciExpressAnd8 ( UINT8 EFIAPI PciExpressAndThenOr8 ( - IN UINTN Address, - IN UINT8 AndData, - IN UINT8 OrData + IN UINTN Address, + IN UINT8 AndData, + IN UINT8 OrData ); /** @@ -186,9 +214,9 @@ PciExpressAndThenOr8 ( UINT8 EFIAPI PciExpressBitFieldRead8 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit ); /** @@ -203,6 +231,7 @@ PciExpressBitFieldRead8 ( If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -217,10 +246,10 @@ PciExpressBitFieldRead8 ( UINT8 EFIAPI PciExpressBitFieldWrite8 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT8 Value + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 Value ); /** @@ -228,7 +257,7 @@ PciExpressBitFieldWrite8 ( writes the result back to the bit field in the 8-bit port. Reads the 8-bit PCI configuration register specified by Address, performs a - bitwise inclusive OR between the read result and the value specified by + bitwise OR between the read result and the value specified by OrData, and writes the result to the 8-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI read and write operations @@ -238,6 +267,7 @@ PciExpressBitFieldWrite8 ( If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -252,10 +282,10 @@ PciExpressBitFieldWrite8 ( UINT8 EFIAPI PciExpressBitFieldOr8 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT8 OrData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 OrData ); /** @@ -273,6 +303,7 @@ PciExpressBitFieldOr8 ( If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -287,19 +318,19 @@ PciExpressBitFieldOr8 ( UINT8 EFIAPI PciExpressBitFieldAnd8 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT8 AndData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 AndData ); /** Reads a bit field in an 8-bit port, performs a bitwise AND followed by a - bitwise inclusive OR, and writes the result back to the bit field in the + bitwise OR, and writes the result back to the bit field in the 8-bit port. Reads the 8-bit PCI configuration register specified by Address, performs a - bitwise AND followed by a bitwise inclusive OR between the read result and + bitwise AND followed by a bitwise OR between the read result and the value specified by AndData, and writes the result to the 8-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI @@ -310,6 +341,8 @@ PciExpressBitFieldAnd8 ( If StartBit is greater than 7, then ASSERT(). If EndBit is greater than 7, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -325,11 +358,11 @@ PciExpressBitFieldAnd8 ( UINT8 EFIAPI PciExpressBitFieldAndThenOr8 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT8 AndData, - IN UINT8 OrData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 AndData, + IN UINT8 OrData ); /** @@ -351,7 +384,7 @@ PciExpressBitFieldAndThenOr8 ( UINT16 EFIAPI PciExpressRead16 ( - IN UINTN Address + IN UINTN Address ); /** @@ -374,16 +407,16 @@ PciExpressRead16 ( UINT16 EFIAPI PciExpressWrite16 ( - IN UINTN Address, - IN UINT16 Value + IN UINTN Address, + IN UINT16 Value ); /** - Performs a bitwise inclusive OR of a 16-bit PCI configuration register with + Performs a bitwise OR of a 16-bit PCI configuration register with a 16-bit value. Reads the 16-bit PCI configuration register specified by Address, performs a - bitwise inclusive OR between the read result and the value specified by + bitwise OR between the read result and the value specified by OrData, and writes the result to the 16-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI read and write operations @@ -402,8 +435,8 @@ PciExpressWrite16 ( UINT16 EFIAPI PciExpressOr16 ( - IN UINTN Address, - IN UINT16 OrData + IN UINTN Address, + IN UINT16 OrData ); /** @@ -430,17 +463,17 @@ PciExpressOr16 ( UINT16 EFIAPI PciExpressAnd16 ( - IN UINTN Address, - IN UINT16 AndData + IN UINTN Address, + IN UINT16 AndData ); /** Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit - value, followed a bitwise inclusive OR with another 16-bit value. + value, followed a bitwise OR with another 16-bit value. Reads the 16-bit PCI configuration register specified by Address, performs a bitwise AND between the read result and the value specified by AndData, - performs a bitwise inclusive OR between the result of the AND operation and + performs a bitwise OR between the result of the AND operation and the value specified by OrData, and writes the result to the 16-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI @@ -460,9 +493,9 @@ PciExpressAnd16 ( UINT16 EFIAPI PciExpressAndThenOr16 ( - IN UINTN Address, - IN UINT16 AndData, - IN UINT16 OrData + IN UINTN Address, + IN UINT16 AndData, + IN UINT16 OrData ); /** @@ -490,9 +523,9 @@ PciExpressAndThenOr16 ( UINT16 EFIAPI PciExpressBitFieldRead16 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit ); /** @@ -508,6 +541,7 @@ PciExpressBitFieldRead16 ( If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -522,10 +556,10 @@ PciExpressBitFieldRead16 ( UINT16 EFIAPI PciExpressBitFieldWrite16 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT16 Value + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 Value ); /** @@ -533,7 +567,7 @@ PciExpressBitFieldWrite16 ( writes the result back to the bit field in the 16-bit port. Reads the 16-bit PCI configuration register specified by Address, performs a - bitwise inclusive OR between the read result and the value specified by + bitwise OR between the read result and the value specified by OrData, and writes the result to the 16-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI read and write operations @@ -544,6 +578,7 @@ PciExpressBitFieldWrite16 ( If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -558,10 +593,10 @@ PciExpressBitFieldWrite16 ( UINT16 EFIAPI PciExpressBitFieldOr16 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT16 OrData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 OrData ); /** @@ -580,6 +615,7 @@ PciExpressBitFieldOr16 ( If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -594,19 +630,19 @@ PciExpressBitFieldOr16 ( UINT16 EFIAPI PciExpressBitFieldAnd16 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT16 AndData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 AndData ); /** Reads a bit field in a 16-bit port, performs a bitwise AND followed by a - bitwise inclusive OR, and writes the result back to the bit field in the + bitwise OR, and writes the result back to the bit field in the 16-bit port. Reads the 16-bit PCI configuration register specified by Address, performs a - bitwise AND followed by a bitwise inclusive OR between the read result and + bitwise AND followed by a bitwise OR between the read result and the value specified by AndData, and writes the result to the 16-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI @@ -618,6 +654,8 @@ PciExpressBitFieldAnd16 ( If StartBit is greater than 15, then ASSERT(). If EndBit is greater than 15, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -633,11 +671,11 @@ PciExpressBitFieldAnd16 ( UINT16 EFIAPI PciExpressBitFieldAndThenOr16 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT16 AndData, - IN UINT16 OrData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 AndData, + IN UINT16 OrData ); /** @@ -659,7 +697,7 @@ PciExpressBitFieldAndThenOr16 ( UINT32 EFIAPI PciExpressRead32 ( - IN UINTN Address + IN UINTN Address ); /** @@ -682,16 +720,16 @@ PciExpressRead32 ( UINT32 EFIAPI PciExpressWrite32 ( - IN UINTN Address, - IN UINT32 Value + IN UINTN Address, + IN UINT32 Value ); /** - Performs a bitwise inclusive OR of a 32-bit PCI configuration register with + Performs a bitwise OR of a 32-bit PCI configuration register with a 32-bit value. Reads the 32-bit PCI configuration register specified by Address, performs a - bitwise inclusive OR between the read result and the value specified by + bitwise OR between the read result and the value specified by OrData, and writes the result to the 32-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI read and write operations @@ -710,8 +748,8 @@ PciExpressWrite32 ( UINT32 EFIAPI PciExpressOr32 ( - IN UINTN Address, - IN UINT32 OrData + IN UINTN Address, + IN UINT32 OrData ); /** @@ -738,17 +776,17 @@ PciExpressOr32 ( UINT32 EFIAPI PciExpressAnd32 ( - IN UINTN Address, - IN UINT32 AndData + IN UINTN Address, + IN UINT32 AndData ); /** Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit - value, followed a bitwise inclusive OR with another 32-bit value. + value, followed a bitwise OR with another 32-bit value. Reads the 32-bit PCI configuration register specified by Address, performs a bitwise AND between the read result and the value specified by AndData, - performs a bitwise inclusive OR between the result of the AND operation and + performs a bitwise OR between the result of the AND operation and the value specified by OrData, and writes the result to the 32-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI @@ -768,9 +806,9 @@ PciExpressAnd32 ( UINT32 EFIAPI PciExpressAndThenOr32 ( - IN UINTN Address, - IN UINT32 AndData, - IN UINT32 OrData + IN UINTN Address, + IN UINT32 AndData, + IN UINT32 OrData ); /** @@ -798,9 +836,9 @@ PciExpressAndThenOr32 ( UINT32 EFIAPI PciExpressBitFieldRead32 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit ); /** @@ -816,6 +854,7 @@ PciExpressBitFieldRead32 ( If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -830,10 +869,10 @@ PciExpressBitFieldRead32 ( UINT32 EFIAPI PciExpressBitFieldWrite32 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT32 Value + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 Value ); /** @@ -841,7 +880,7 @@ PciExpressBitFieldWrite32 ( writes the result back to the bit field in the 32-bit port. Reads the 32-bit PCI configuration register specified by Address, performs a - bitwise inclusive OR between the read result and the value specified by + bitwise OR between the read result and the value specified by OrData, and writes the result to the 32-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI read and write operations @@ -852,6 +891,7 @@ PciExpressBitFieldWrite32 ( If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -866,10 +906,10 @@ PciExpressBitFieldWrite32 ( UINT32 EFIAPI PciExpressBitFieldOr32 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT32 OrData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 OrData ); /** @@ -888,6 +928,7 @@ PciExpressBitFieldOr32 ( If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -902,19 +943,19 @@ PciExpressBitFieldOr32 ( UINT32 EFIAPI PciExpressBitFieldAnd32 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT32 AndData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData ); /** Reads a bit field in a 32-bit port, performs a bitwise AND followed by a - bitwise inclusive OR, and writes the result back to the bit field in the + bitwise OR, and writes the result back to the bit field in the 32-bit port. Reads the 32-bit PCI configuration register specified by Address, performs a - bitwise AND followed by a bitwise inclusive OR between the read result and + bitwise AND followed by a bitwise OR between the read result and the value specified by AndData, and writes the result to the 32-bit PCI configuration register specified by Address. The value written to the PCI configuration register is returned. This function must guarantee that all PCI @@ -926,6 +967,8 @@ PciExpressBitFieldAnd32 ( If StartBit is greater than 31, then ASSERT(). If EndBit is greater than 31, then ASSERT(). If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). @param Address PCI configuration register to write. @param StartBit The ordinal of the least significant bit in the bit field. @@ -941,11 +984,11 @@ PciExpressBitFieldAnd32 ( UINT32 EFIAPI PciExpressBitFieldAndThenOr32 ( - IN UINTN Address, - IN UINTN StartBit, - IN UINTN EndBit, - IN UINT32 AndData, - IN UINT32 OrData + IN UINTN Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData, + IN UINT32 OrData ); /** @@ -955,7 +998,7 @@ PciExpressBitFieldAndThenOr32 ( Size into the buffer specified by Buffer. This function only allows the PCI configuration registers from a single PCI function to be read. Size is returned. When possible 32-bit PCI configuration read cycles are used to read - from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit + from StartAddress to StartAddress + Size. Due to alignment restrictions, 8-bit and 16-bit PCI configuration read cycles may be used at the beginning and the end of the range. @@ -968,15 +1011,15 @@ PciExpressBitFieldAndThenOr32 ( @param Size Size in bytes of the transfer. @param Buffer Pointer to a buffer receiving the data read. - @return Size read daata from StartAddress. + @return Size read data from StartAddress. **/ UINTN EFIAPI PciExpressReadBuffer ( - IN UINTN StartAddress, - IN UINTN Size, - OUT VOID *Buffer + IN UINTN StartAddress, + IN UINTN Size, + OUT VOID *Buffer ); /** @@ -987,7 +1030,7 @@ PciExpressReadBuffer ( Size from the buffer specified by Buffer. This function only allows the PCI configuration registers from a single PCI function to be written. Size is returned. When possible 32-bit PCI configuration write cycles are used to - write from StartAdress to StartAddress + Size. Due to alignment restrictions, + write from StartAddress to StartAddress + Size. Due to alignment restrictions, 8-bit and 16-bit PCI configuration write cycles may be used at the beginning and the end of the range. @@ -1006,9 +1049,9 @@ PciExpressReadBuffer ( UINTN EFIAPI PciExpressWriteBuffer ( - IN UINTN StartAddress, - IN UINTN Size, - IN VOID *Buffer + IN UINTN StartAddress, + IN UINTN Size, + IN VOID *Buffer ); #endif