[edk2-devel] [PATCH v1 04/10] Silicon/Phytium: Added PciSegmentLib to FT2000/4
Leif Lindholm
leif at nuviainc.com
Wed Feb 10 18:59:12 UTC 2021
On Fri, Feb 05, 2021 at 18:06:24 +0800, Ling Jia wrote:
> The PCI Segment Library for Phytium platform.
> with multiple RCs.
>
> Signed-off-by: Ling Jia <jialing at phytium.com.cn>
> ---
> Platform/Phytium/DurianPkg/DurianPkg.dsc | 9 +-
> Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.inf | 28 +
> Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.c | 1433 ++++++++++++++++++++
> 3 files changed, 1463 insertions(+), 7 deletions(-)
>
> diff --git a/Platform/Phytium/DurianPkg/DurianPkg.dsc b/Platform/Phytium/DurianPkg/DurianPkg.dsc
> index 75222fac578c..0b615081c83b 100644
> --- a/Platform/Phytium/DurianPkg/DurianPkg.dsc
> +++ b/Platform/Phytium/DurianPkg/DurianPkg.dsc
> @@ -35,7 +35,8 @@ [LibraryClasses.common]
> PL011UartLib|ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf
>
> [LibraryClasses.common.DXE_DRIVER]
> -
> + # Pci dependencies
> + PciSegmentLib|Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.inf
>
> ################################################################################
> #
> @@ -242,12 +243,6 @@ [Components.common]
> MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
> MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf
>
> - #
> - # PCI Support
> - #
> - ArmPkg/Drivers/ArmPciCpuIo2Dxe/ArmPciCpuIo2Dxe.inf
> - MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceDxe.inf
> -
> #
> # The following 2 module perform the same work except one operate variable.
> # Only one of both should be put into fdf.
> diff --git a/Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.inf b/Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.inf
> new file mode 100644
> index 000000000000..67360016eff9
> --- /dev/null
> +++ b/Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.inf
> @@ -0,0 +1,28 @@
> +#/** @file
> +# PCI Segment Library for Phytium platform with multiple RCs.
> +#
> +# Copyright (C) 2020, Phytium Technology Co, Ltd. All rights reserved.<BR>
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#**/
> +
> +[Defines]
> + INF_VERSION = 0x0001001b
> + BASE_NAME = PciSegmentLib
> + FILE_GUID = fa5173d2-40fe-11eb-9b2f-cb20dc669fd3
> + MODULE_TYPE = BASE
> + VERSION_STRING = 1.0
> + LIBRARY_CLASS = PciSegmentLib
> +
> +[Sources]
> + PciSegmentLib.c
> +
> +[Packages]
> + MdePkg/MdePkg.dec
> + Silicon/Phytium/PhytiumCommonPkg/PhytiumCommonPkg.dec
> +
> +[LibraryClasses]
> + BaseLib
> + DebugLib
> + IoLib
> diff --git a/Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.c b/Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.c
> new file mode 100644
> index 000000000000..e31f6f534242
> --- /dev/null
> +++ b/Silicon/Phytium/FT2000-4Pkg/Library/PciSegmentLib/PciSegmentLib.c
> @@ -0,0 +1,1433 @@
> +/** @file
> + PCI Segment Library for SoC with multiple RCs.
> +
> + Copyright (C) 2020, Phytium Technology Co Ltd. All rights reserved.<BR>
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include <Base.h>
> +#include <Library/PciSegmentLib.h>
> +#include <Library/BaseLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/IoLib.h>
> +
> +#define PCI_SEG_CONFIG_BASE 0x40000000
> +#define PCIE_BIF_MODE 0x29100800
> +
> +typedef enum {
> + PciCfgWidthUint8 = 0,
> + PciCfgWidthUint16,
> + PciCfgWidthUint32,
> + PciCfgWidthMax
> +} PCI_CFG_WIDTH;
> +
> +/**
> + Assert the validity of a PCI Segment address.
> + A valid PCI Segment address should not contain 1's in bits 28..31 and 48..63
> +
> + @param[in] A The address to validate.
> + @param[in] M Additional bits to assert to be zero.
> +
> +**/
> +#define ASSERT_INVALID_PCI_SEGMENT_ADDRESS(A,M) \
> +ASSERT (((A) & (0xffff0000f0000000ULL | (M))) == 0)
> +
> +
> +#define EXTRACT_PCIE_ADDRESS(Address, Bus, Device, Function) \
> +{ \
> + (Bus) = (((Address) >> 20) & 0xff); \
> + (Device) = (((Address) >> 15) & 0x1f); \
> + (Function) = (((Address) >> 12) & 0x07); \
> +}
> +
> +
> +/**
> + This function geted the config base of PCI device.
> + @param[in] Address The address that encodes the PCI Bus, Device, Function and
> + Register.
> +
> + @return The value of the config base of PCI device.
> +
> +**/
> +STATIC
> +UINT64
> +PciSegmentLibGetConfigBase (
> + IN UINT64 Address
> + )
> +{
> + UINT8 Bus;
> + UINT8 Device;
> + UINT8 Function;
> + UINT8 RootPortCount;
> + UINT8 Peu0RootPortCount;
> + UINT8 Peu1RootPortCount;
> + UINT32 BifMode;
> + UINT32 Peu0BifMode;
> + UINT32 Peu1BifMode;
> +
> + EXTRACT_PCIE_ADDRESS (Address, Bus, Device, Function);
> + BifMode = MmioRead32 (PCIE_BIF_MODE);
> + Peu0BifMode = BifMode & 0x3;
> + Peu1BifMode = (BifMode >> 2) & 0x3;
> +
> + if ((Peu0BifMode == 1)) {
> + Peu0RootPortCount = 3;
> + } else {
> + Peu0RootPortCount = 2;
> + }
> +
> + if ((Peu1BifMode == 1)) {
> + Peu1RootPortCount = 3;
> + } else {
> + Peu1RootPortCount = 2;
> + }
> + RootPortCount = Peu0RootPortCount + Peu1RootPortCount;
> + //ignore device > 0 or function > 0 on root port
> + if (RootPortCount == 4) {
> + if ((Bus == 1) || (Bus == 2) || (Bus == 3) || (Bus == 4)) {
> + if (Device != 0 || Function != 0) {
> + return 0xFFFFFFFF;
> + }
> + return PCI_SEG_CONFIG_BASE;
> + }
> + } else if (RootPortCount == 5) {
> + if ((Bus == 1) || (Bus == 2) || (Bus == 3) || (Bus == 4) || (Bus == 5)) {
> + if (Device != 0 || Function != 0) {
> + return 0xFFFFFFFF;
> + }
> + return PCI_SEG_CONFIG_BASE;
> + }
> + } else if (RootPortCount == 6) {
> + if ((Bus == 1) || (Bus == 2) || (Bus == 3) || (Bus == 4) || (Bus == 5) || (Bus == 6)) {
> + if (Device != 0 || Function != 0) {
> + return 0xFFFFFFFF;
> + }
> + return PCI_SEG_CONFIG_BASE;
> + }
> + }
> +
> + return PCI_SEG_CONFIG_BASE;
> +}
> +
> +/**
> + Internal worker function to read a PCI configuration register.
> +
> + @param[in] Address The address that encodes the PCI Bus, Device, Function and
> + Register.
> + @param[in] Width The width of data to read
> +
> + @return The value read from the PCI configuration register.
> +
> +**/
> +STATIC
> +UINT32
> +PciSegmentLibReadWorker (
> + IN UINT64 Address,
> + IN PCI_CFG_WIDTH Width
> + )
> +{
> + UINT64 Base;
> +
> + Base = PciSegmentLibGetConfigBase (Address);
> + if (Base == 0xFFFFFFFF) {
> + return 0xFFFFFFFF;
> + }
> +
> + switch (Width) {
> + case PciCfgWidthUint8:
> + return MmioRead8 (Base + (UINT32)Address);
> + case PciCfgWidthUint16:
> + return MmioRead16 (Base + (UINT32)Address);
> + case PciCfgWidthUint32:
> + return MmioRead32 (Base + (UINT32)Address);
> + default:
> + ASSERT (FALSE);
> + }
> +
> + return 0;
> +}
> +
> +
> +/**
> + Internal worker function to writes a PCI configuration register.
> +
> + @param[in] Address The address that encodes the PCI Bus, Device, Function and
> + Register.
> + @param[in] Width The width of data to write
> + @param[in] Data The value to write.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +STATIC
> +UINT32
> +PciSegmentLibWriteWorker (
> + IN UINT64 Address,
> + IN PCI_CFG_WIDTH Width,
> + IN UINT32 Data
> + )
> +{
> + UINT64 Base;
> +
> + Base = PciSegmentLibGetConfigBase (Address);
> + if (Base == 0xFFFFFFFF) {
> + return 0xFFFFFFFF;
> + }
> +
> + switch (Width) {
> + case PciCfgWidthUint8:
> + MmioWrite8 (Base + (UINT32)Address, Data);
> + break;
> + case PciCfgWidthUint16:
> + MmioWrite16 (Base + (UINT32)Address, Data);
> + break;
> + case PciCfgWidthUint32:
> + MmioWrite32 (Base + (UINT32)Address, Data);
> + break;
> + default:
> + ASSERT (FALSE);
> + }
> +
> + return Data;
> +}
> +
> +/**
> + Register a PCI device so PCI configuration registers may be accessed after
> + SetVirtualAddressMap().
> +
> + If any reserved bits in Address are set, then ASSERT().
> +
> + @param[in] Address The 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
> +PciSegmentRegisterForRuntimeAccess (
> + IN UINTN Address
> + )
> +{
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0);
> +
> + return RETURN_UNSUPPORTED;
> +}
> +
> +/**
> + Reads an 8-bit PCI configuration register.
> +
> + Reads and returns the 8-bit PCI configuration register specified by Address.
> + This function must guarantee that all PCI read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function,
> + and Register.
> +
> + @return The 8-bit PCI configuration register specified by Address.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentRead8 (
> + IN UINT64 Address
> + )
> +{
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0);
> +
> + return (UINT8) PciSegmentLibReadWorker (Address, PciCfgWidthUint8);
> +}
> +
> +/**
> + Writes an 8-bit PCI configuration register.
> +
> + Writes the 8-bit PCI configuration register specified by Address with the value specified by Value.
> + Value is returned. This function must guarantee that all PCI read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] Value The value to write.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentWrite8 (
> + IN UINT64 Address,
> + IN UINT8 Value
> + )
> +{
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0);
> +
> + return (UINT8) PciSegmentLibWriteWorker (Address, PciCfgWidthUint8, Value);
> +}
> +
> +/**
> + 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 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 are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentOr8 (
> + IN UINT64 Address,
> + IN UINT8 OrData
> + )
> +{
> + return PciSegmentWrite8 (Address, (UINT8) (PciSegmentRead8 (Address) | OrData));
> +}
> +
> +/**
> + Performs a bitwise AND 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 AND 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 read and write operations are serialized.
> + If any reserved bits in Address are set, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] AndData The value to AND with the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentAnd8 (
> + IN UINT64 Address,
> + IN UINT8 AndData
> + )
> +{
> + return PciSegmentWrite8 (Address, (UINT8) (PciSegmentRead8 (Address) & AndData));
> +}
> +
> +/**
> + Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit 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 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 read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] AndData The value to AND with the PCI configuration register.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentAndThenOr8 (
> + IN UINT64 Address,
> + IN UINT8 AndData,
> + IN UINT8 OrData
> + )
> +{
> + return PciSegmentWrite8 (Address, (UINT8) ((PciSegmentRead8 (Address) & AndData) | OrData));
> +}
> +
> +/**
> + Reads a bit field of a PCI configuration register.
> +
> + Reads the bit field in an 8-bit PCI configuration register. The bit field is
> + specified by the StartBit and the EndBit. The value of the bit field is
> + returned.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If StartBit is greater than 7, then ASSERT().
> + If EndBit is greater than 7, then ASSERT().
> + If EndBit is less than StartBit, then ASSERT().
> +
> + @param[in] Address The PCI configuration register to read.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..7.
> + @param[in] 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.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentBitFieldRead8 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit
> + )
> +{
> + return BitFieldRead8 (PciSegmentRead8 (Address), StartBit, EndBit);
> +}
> +
> +/**
> + Writes a bit field to a PCI configuration register.
> +
> + Writes Value to the bit field of the PCI configuration register. The bit
> + field is specified by the StartBit and the EndBit. All other bits in the
> + destination PCI configuration register are preserved. The new value of the
> + 8-bit register is returned.
> +
> + @param[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..7.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..7.
> + @param[in] Value The new value of the bit field.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentBitFieldWrite8 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT8 Value
> + )
> +{
> + return PciSegmentWrite8 (
> + Address,
> + BitFieldWrite8 (PciSegmentRead8 (Address), StartBit, EndBit, Value)
> + );
> +}
> +
> +/**
> + Reads a bit field in an 8-bit PCI configuration, performs a 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 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
> + are serialized. Extra left bits in OrData are stripped.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..7.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..7.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentBitFieldOr8 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT8 OrData
> + )
> +{
> + return PciSegmentWrite8 (
> + Address,
> + BitFieldOr8 (PciSegmentRead8 (Address), StartBit, EndBit, OrData)
> + );
> +}
> +
> +/**
> + Reads a bit field in an 8-bit PCI configuration register, performs a bitwise
> + AND, and writes the result back to the bit field in the 8-bit register.
> +
> + Reads the 8-bit PCI configuration register specified by Address, performs a
> + bitwise AND 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 read and write operations are
> + serialized. Extra left bits in AndData are stripped.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..7.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..7.
> + @param[in] AndData The value to AND with the PCI configuration register.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentBitFieldAnd8 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT8 AndData
> + )
> +{
> + return PciSegmentWrite8 (
> + Address,
> + BitFieldAnd8 (PciSegmentRead8 (Address), StartBit, EndBit, AndData)
> + );
> +}
> +
> +/**
> + Reads a bit field in an 8-bit port, performs a bitwise AND followed by a
> + 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 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
> + read and write operations are serialized. Extra left bits in both AndData and
> + OrData are stripped.
> +
> + @param[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..7.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..7.
> + @param[in] AndData The value to AND with the PCI configuration register.
> + @param[in] OrData The value to OR with the result of the AND operation.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT8
> +EFIAPI
> +PciSegmentBitFieldAndThenOr8 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT8 AndData,
> + IN UINT8 OrData
> + )
> +{
> + return PciSegmentWrite8 (
> + Address,
> + BitFieldAndThenOr8 (PciSegmentRead8 (Address), StartBit, EndBit, AndData, OrData)
> + );
> +}
> +
> +/**
> + Reads a 16-bit PCI configuration register.
> +
> + Reads and returns the 16-bit PCI configuration register specified by Address.
> + This function must guarantee that all PCI read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> +
> + @return The 16-bit PCI configuration register specified by Address.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentRead16 (
> + IN UINT64 Address
> + )
> +{
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 1);
> +
> + return (UINT16) PciSegmentLibReadWorker (Address, PciCfgWidthUint16);
> +}
> +
> +/**
> + Writes a 16-bit PCI configuration register.
> +
> + Writes the 16-bit PCI configuration register specified by Address with the value specified by Value.
> + Value is returned. This function must guarantee that all PCI read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] Value The value to write.
> +
> + @return The parameter of Value.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentWrite16 (
> + IN UINT64 Address,
> + IN UINT16 Value
> + )
> +{
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 1);
> +
> + return (UINT16) PciSegmentLibWriteWorker (Address, PciCfgWidthUint16, Value);
> +}
> +
> +/**
> + 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 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
> + are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function and
> + Register.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentOr16 (
> + IN UINT64 Address,
> + IN UINT16 OrData
> + )
> +{
> + return PciSegmentWrite16 (Address, (UINT16) (PciSegmentRead16 (Address) | OrData));
> +}
> +
> +/**
> + Performs a bitwise AND 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 AND 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 read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] AndData The value to AND with the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentAnd16 (
> + IN UINT64 Address,
> + IN UINT16 AndData
> + )
> +{
> + return PciSegmentWrite16 (Address, (UINT16) (PciSegmentRead16 (Address) & AndData));
> +}
> +
> +/**
> + Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit 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 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 read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] AndData The value to AND with the PCI configuration register.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentAndThenOr16 (
> + IN UINT64 Address,
> + IN UINT16 AndData,
> + IN UINT16 OrData
> + )
> +{
> + return PciSegmentWrite16 (Address, (UINT16) ((PciSegmentRead16 (Address) & AndData) | OrData));
> +}
> +
> +/**
> + Reads a bit field of a PCI configuration register.
> +
> + Reads the bit field in a 16-bit PCI configuration register. The bit field is
> + specified by the StartBit and the EndBit. The value of the bit field is
> + returned.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> + If StartBit is greater than 15, then ASSERT().
> + If EndBit is greater than 15, then ASSERT().
> + If EndBit is less than StartBit, then ASSERT().
> +
> + @param[in] Address The PCI configuration register to read.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..15.
> + @param[in] 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.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentBitFieldRead16 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit
> + )
> +{
> + return BitFieldRead16 (PciSegmentRead16 (Address), StartBit, EndBit);
> +}
> +
> +/**
> + Writes a bit field to a PCI configuration register.
> +
> + Writes Value to the bit field of the PCI configuration register. The bit
> + field is specified by the StartBit and the EndBit. All other bits in the
> + destination PCI configuration register are preserved. The new value of the
> + 16-bit register is returned.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..15.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..15.
> + @param[in] Value The new value of the bit field.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentBitFieldWrite16 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT16 Value
> + )
> +{
> + return PciSegmentWrite16 (
> + Address,
> + BitFieldWrite16 (PciSegmentRead16 (Address), StartBit, EndBit, Value)
> + );
> +}
> +
> +/**
> + Reads the 16-bit PCI configuration register specified by Address,
> + performs a 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.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..15.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..15.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentBitFieldOr16 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT16 OrData
> + )
> +{
> + return PciSegmentWrite16 (
> + Address,
> + BitFieldOr16 (PciSegmentRead16 (Address), StartBit, EndBit, OrData)
> + );
> +}
> +
> +/**
> + Reads a bit field in a 16-bit PCI configuration, performs a 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 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 are serialized.
> + Extra left bits in OrData are stripped.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 16-bit boundary, then ASSERT().
> + 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[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + The ordinal of the least significant bit in a byte is bit 0.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + The ordinal of the most significant bit in a byte is bit 7.
> + @param[in] AndData The value to AND with the read value from the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentBitFieldAnd16 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT16 AndData
> + )
> +{
> + return PciSegmentWrite16 (
> + Address,
> + BitFieldAnd16 (PciSegmentRead16 (Address), StartBit, EndBit, AndData)
> + );
> +}
> +
> +/**
> + Reads a bit field in a 16-bit port, performs a bitwise AND followed by a
> + 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 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
> + read and write operations are serialized. Extra left bits in both AndData and
> + OrData are stripped.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..15.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..15.
> + @param[in] AndData The value to AND with the PCI configuration register.
> + @param[in] OrData The value to OR with the result of the AND operation.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT16
> +EFIAPI
> +PciSegmentBitFieldAndThenOr16 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT16 AndData,
> + IN UINT16 OrData
> + )
> +{
> + return PciSegmentWrite16 (
> + Address,
> + BitFieldAndThenOr16 (PciSegmentRead16 (Address), StartBit, EndBit, AndData, OrData)
> + );
> +}
> +
> +/**
> + Reads a 32-bit PCI configuration register.
> +
> + Reads and returns the 32-bit PCI configuration register specified by Address.
> + This function must guarantee that all PCI read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 32-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function,
> + and Register.
> +
> + @return The 32-bit PCI configuration register specified by Address.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentRead32 (
> + IN UINT64 Address
> + )
> +{
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 3);
> +
> + return PciSegmentLibReadWorker (Address, PciCfgWidthUint32);
> +}
> +
> +/**
> + Writes a 32-bit PCI configuration register.
> +
> + Writes the 32-bit PCI configuration register specified by Address with the value specified by Value.
> + Value is returned. This function must guarantee that all PCI read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 32-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device,
> + Function, and Register.
> + @param[in] Value The value to write.
> +
> + @return The parameter of Value.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentWrite32 (
> + IN UINT64 Address,
> + IN UINT32 Value
> + )
> +{
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 3);
> +
> + return PciSegmentLibWriteWorker (Address, PciCfgWidthUint32, Value);
> +}
> +
> +/**
> + 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 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 are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 32-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function, and Register.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentOr32 (
> + IN UINT64 Address,
> + IN UINT32 OrData
> + )
> +{
> + return PciSegmentWrite32 (Address, PciSegmentRead32 (Address) | OrData);
> +}
> +
> +/**
> + Performs a bitwise AND 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 AND 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 read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 32-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function,
> + and Register.
> + @param[in] AndData The value to AND with the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentAnd32 (
> + IN UINT64 Address,
> + IN UINT32 AndData
> + )
> +{
> + return PciSegmentWrite32 (Address, PciSegmentRead32 (Address) & AndData);
> +}
> +
> +/**
> + Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit 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 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 read and write operations are serialized.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 32-bit boundary, then ASSERT().
> +
> + @param[in] Address The address that encodes the PCI Segment, Bus, Device, Function,
> + and Register.
> + @param[in] AndData The value to AND with the PCI configuration register.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written to the PCI configuration register.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentAndThenOr32 (
> + IN UINT64 Address,
> + IN UINT32 AndData,
> + IN UINT32 OrData
> + )
> +{
> + return PciSegmentWrite32 (Address, (PciSegmentRead32 (Address) & AndData) | OrData);
> +}
> +
> +/**
> + Reads a bit field of a PCI configuration register.
> +
> + Reads the bit field in a 32-bit PCI configuration register. The bit field is
> + specified by the StartBit and the EndBit. The value of the bit field is returned.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 32-bit boundary, then ASSERT().
> + If StartBit is greater than 31, then ASSERT().
> + If EndBit is greater than 31, then ASSERT().
> + If EndBit is less than StartBit, then ASSERT().
> +
> + @param[in] Address The PCI configuration register to read.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..31.
> + @param[in] 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.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentBitFieldRead32 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit
> + )
> +{
> + return BitFieldRead32 (PciSegmentRead32 (Address), StartBit, EndBit);
> +}
> +
> +/**
> + Writes a bit field to a PCI configuration register.
> +
> + Writes Value to the bit field of the PCI configuration register. The bit
> + field is specified by the StartBit and the EndBit. All other bits in the
> + destination PCI configuration register are preserved. The new value of the
> + 32-bit register is returned.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 32-bit boundary, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..31.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..31.
> + @param[in] Value The new value of the bit field.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentBitFieldWrite32 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT32 Value
> + )
> +{
> + return PciSegmentWrite32 (
> + Address,
> + BitFieldWrite32 (PciSegmentRead32 (Address), StartBit, EndBit, Value)
> + );
> +}
> +
> +/**
> + Reads a bit field in a 32-bit PCI configuration, performs a 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 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
> + are serialized. Extra left bits in OrData are stripped.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..31.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..31.
> + @param[in] OrData The value to OR with the PCI configuration register.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentBitFieldOr32 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT32 OrData
> + )
> +{
> + return PciSegmentWrite32 (
> + Address,
> + BitFieldOr32 (PciSegmentRead32 (Address), StartBit, EndBit, OrData)
> + );
> +}
> +
> +/**
> + Reads a bit field in a 32-bit PCI configuration register, performs a bitwise
> + AND, and writes the result back to the bit field in the 32-bit register.
> +
> +
> + Reads the 32-bit PCI configuration register specified by Address, performs a bitwise
> + AND 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
> + read and write operations are serialized. Extra left bits in AndData are stripped.
> + If any reserved bits in Address are set, then ASSERT().
> + If Address is not aligned on a 32-bit boundary, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..31.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..31.
> + @param[in] AndData The value to AND with the PCI configuration register.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentBitFieldAnd32 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT32 AndData
> + )
> +{
> + return PciSegmentWrite32 (
> + Address,
> + BitFieldAnd32 (PciSegmentRead32 (Address), StartBit, EndBit, AndData)
> + );
> +}
> +
> +/**
> + Reads a bit field in a 32-bit port, performs a bitwise AND followed by a
> + 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 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
> + read and write operations are serialized. Extra left bits in both AndData and
> + OrData are stripped.
> +
> + If any reserved bits in Address are set, then ASSERT().
> + 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[in] Address The PCI configuration register to write.
> + @param[in] StartBit The ordinal of the least significant bit in the bit field.
> + Range 0..31.
> + @param[in] EndBit The ordinal of the most significant bit in the bit field.
> + Range 0..31.
> + @param[in] AndData The value to AND with the PCI configuration register.
> + @param[in] OrData The value to OR with the result of the AND operation.
> +
> + @return The value written back to the PCI configuration register.
> +
> +**/
> +UINT32
> +EFIAPI
> +PciSegmentBitFieldAndThenOr32 (
> + IN UINT64 Address,
> + IN UINTN StartBit,
> + IN UINTN EndBit,
> + IN UINT32 AndData,
> + IN UINT32 OrData
> + )
> +{
> + return PciSegmentWrite32 (
> + Address,
> + BitFieldAndThenOr32 (PciSegmentRead32 (Address), StartBit, EndBit, AndData, OrData)
> + );
> +}
> +
> +/**
> + Reads a range of PCI configuration registers into a caller supplied buffer.
> +
> + Reads the range of PCI configuration registers specified by StartAddress and
> + 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
> + and 16-bit PCI configuration read cycles may be used at the beginning and the
> + end of the range.
> +
> + If any reserved bits in StartAddress are set, then ASSERT().
> + If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
> + If Size > 0 and Buffer is NULL, then ASSERT().
> +
> + @param[in] StartAddress The starting address that encodes the PCI Segment, Bus,
> + Device, Function and Register.
> + @param[in] Size The size in bytes of the transfer.
> + @param[in] Buffer The pointer to a buffer receiving the data read.
> +
> + @return Size
> +
> +**/
> +UINTN
> +EFIAPI
> +PciSegmentReadBuffer (
> + IN UINT64 StartAddress,
> + IN UINTN Size,
> + OUT VOID *Buffer
> + )
> +{
> + UINTN ReturnValue;
> +
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (StartAddress, 0);
> + ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);
> +
> + if (Size == 0) {
> + return Size;
> + }
> +
> + ASSERT (Buffer != NULL);
> +
> + //
> + // Save Size for return
> + //
> + ReturnValue = Size;
> +
> + if ((StartAddress & BIT0) != 0) {
> + //
> + // Read a byte if StartAddress is byte aligned
> + //
> + *(volatile UINT8 *)Buffer = PciSegmentRead8 (StartAddress);
What effect are you expecting out of that volatile?
> + StartAddress += sizeof (UINT8);
> + Size -= sizeof (UINT8);
> + Buffer = (UINT8*)Buffer + 1;
> + }
> +
> + if (Size >= sizeof (UINT16) && (StartAddress & BIT1) != 0) {
> + //
> + // Read a word if StartAddress is word aligned
> + //
> + WriteUnaligned16 (Buffer, PciSegmentRead16 (StartAddress));
> + StartAddress += sizeof (UINT16);
> + Size -= sizeof (UINT16);
> + Buffer = (UINT16*)Buffer + 1;
> + }
> +
> + while (Size >= sizeof (UINT32)) {
> + //
> + // Read as many double words as possible
> + //
> + WriteUnaligned32 (Buffer, PciSegmentRead32 (StartAddress));
> + StartAddress += sizeof (UINT32);
> + Size -= sizeof (UINT32);
> + Buffer = (UINT32*)Buffer + 1;
> + }
> +
> + if (Size >= sizeof (UINT16)) {
> + //
> + // Read the last remaining word if exist
> + //
> + WriteUnaligned16 (Buffer, PciSegmentRead16 (StartAddress));
> + StartAddress += sizeof (UINT16);
> + Size -= sizeof (UINT16);
> + Buffer = (UINT16*)Buffer + 1;
> + }
> +
> + if (Size >= sizeof (UINT8)) {
> + //
> + // Read the last remaining byte if exist
> + //
> + *(volatile UINT8 *)Buffer = PciSegmentRead8 (StartAddress);
What effect are you expecting out of that volatile?
/
Leif
> + }
> +
> + return ReturnValue;
> +}
> +
> +
> +/**
> + Copies the data in a caller supplied buffer to a specified range of PCI
> + configuration space.
> +
> + Writes the range of PCI configuration registers specified by StartAddress and
> + 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,
> + 8-bit and 16-bit PCI configuration write cycles may be used at the beginning
> + and the end of the range.
> +
> + If any reserved bits in StartAddress are set, then ASSERT().
> + If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
> + If Size > 0 and Buffer is NULL, then ASSERT().
> +
> + @param[in] StartAddress The starting address that encodes the PCI Segment, Bus,
> + Device, Function and Register.
> + @param[in] Size The size in bytes of the transfer.
> + @param[in] Buffer The pointer to a buffer containing the data to write.
> +
> + @return The parameter of Size.
> +
> +**/
> +UINTN
> +EFIAPI
> +PciSegmentWriteBuffer (
> + IN UINT64 StartAddress,
> + IN UINTN Size,
> + IN VOID *Buffer
> + )
> +{
> + UINTN ReturnValue;
> +
> + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (StartAddress, 0);
> + ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);
> +
> + if (Size == 0) {
> + return 0;
> + }
> +
> + ASSERT (Buffer != NULL);
> +
> + //
> + // Save Size for return
> + //
> + ReturnValue = Size;
> +
> + if ((StartAddress & BIT0) != 0) {
> + //
> + // Write a byte if StartAddress is byte aligned
> + //
> + PciSegmentWrite8 (StartAddress, *(UINT8*)Buffer);
> + StartAddress += sizeof (UINT8);
> + Size -= sizeof (UINT8);
> + Buffer = (UINT8*)Buffer + 1;
> + }
> +
> + if (Size >= sizeof (UINT16) && (StartAddress & BIT1) != 0) {
> + //
> + // Write a word if StartAddress is word aligned
> + //
> + PciSegmentWrite16 (StartAddress, ReadUnaligned16 (Buffer));
> + StartAddress += sizeof (UINT16);
> + Size -= sizeof (UINT16);
> + Buffer = (UINT16*)Buffer + 1;
> + }
> +
> + while (Size >= sizeof (UINT32)) {
> + //
> + // Write as many double words as possible
> + //
> + PciSegmentWrite32 (StartAddress, ReadUnaligned32 (Buffer));
> + StartAddress += sizeof (UINT32);
> + Size -= sizeof (UINT32);
> + Buffer = (UINT32*)Buffer + 1;
> + }
> +
> + if (Size >= sizeof (UINT16)) {
> + //
> + // Write the last remaining word if exist
> + //
> + PciSegmentWrite16 (StartAddress, ReadUnaligned16 (Buffer));
> + StartAddress += sizeof (UINT16);
> + Size -= sizeof (UINT16);
> + Buffer = (UINT16*)Buffer + 1;
> + }
> +
> + if (Size >= sizeof (UINT8)) {
> + //
> + // Write the last remaining byte if exist
> + //
> + PciSegmentWrite8 (StartAddress, *(UINT8*)Buffer);
> + }
> +
> + return ReturnValue;
> +}
> --
> 2.25.1
>
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#71579): https://edk2.groups.io/g/devel/message/71579
Mute This Topic: https://groups.io/mt/80539828/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-
More information about the edk2-devel-archive
mailing list