From 25a1f91d489c7e01226a343afc24164e235b0fe9 Mon Sep 17 00:00:00 2001 From: qhuang8 Date: Wed, 18 Nov 2009 04:10:33 +0000 Subject: [PATCH] Add PI 1.2 CPU I/O 2 protocol definitions. This is boot time only protocol. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9440 6f19259b-4bc3-4df7-8a09-765794883524 --- MdePkg/Include/Protocol/CpuIo2.h | 145 +++++++++++++++++++++++++++++++ MdePkg/MdePkg.dec | 3 + 2 files changed, 148 insertions(+) create mode 100644 MdePkg/Include/Protocol/CpuIo2.h diff --git a/MdePkg/Include/Protocol/CpuIo2.h b/MdePkg/Include/Protocol/CpuIo2.h new file mode 100644 index 0000000000..0156489eea --- /dev/null +++ b/MdePkg/Include/Protocol/CpuIo2.h @@ -0,0 +1,145 @@ +/** @file + This files describes the CPU I/O 2 Protocol. + + This protocol provides an I/O abstraction for a system processor. This protocol + is used by a PCI root bridge I/O driver to perform memory-mapped I/O and I/O transactions. + The I/O or memory primitives can be used by the consumer of the protocol to materialize + bus-specific configuration cycles, such as the transitional configuration address and data + ports for PCI. Only drivers that require direct access to the entire system should use this + protocol. + + Note: This is a boot-services only protocol and it may not be used by runtime drivers after + ExitBootServices(). It is different from the Framework CPU I/O Protocol, which is a runtime + protocol and can be used by runtime drivers after ExitBootServices(). + + Copyright (c) 2007 - 2009, 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 + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + + @par Revision Reference: + This Protocol is defined in UEFI Platform Initialization Specification 1.2 + Volume 5: Standards + +**/ + +#ifndef __CPU_IO2_H__ +#define __CPU_IO2_H__ + + +#define EFI_CPU_IO2_PROTOCOL_GUID \ + { \ + 0xad61f191, 0xae5f, 0x4c0e, {0xb9, 0xfa, 0xe8, 0x69, 0xd2, 0x88, 0xc6, 0x4f} \ + } + +typedef struct _EFI_CPU_IO2_PROTOCOL EFI_CPU_IO2_PROTOCOL; + + +/// +/// Enumeration that defines the width of the I/O operation. +/// +typedef enum { + EfiCpuIoWidthUint8, + EfiCpuIoWidthUint16, + EfiCpuIoWidthUint32, + EfiCpuIoWidthUint64, + EfiCpuIoWidthFifoUint8, + EfiCpuIoWidthFifoUint16, + EfiCpuIoWidthFifoUint32, + EfiCpuIoWidthFifoUint64, + EfiCpuIoWidthFillUint8, + EfiCpuIoWidthFillUint16, + EfiCpuIoWidthFillUint32, + EfiCpuIoWidthFillUint64, + EfiCpuIoWidthMaximum +} EFI_CPU_IO_PROTOCOL_WIDTH; + + +/** + Enables a driver to access registers in the PI CPU I/O space. + + The Io.Read() and Io.Write() functions enable a driver to access PCI controller registers in + the PI CPU I/O space. + + The I/O operations are carried out exactly as requested. The caller is responsible for satisfying any + alignment and I/O width restrictions that a PI System on a platform might require. For example on + some platforms, width requests of EfiCpuIoWidthUint64 do not work. Misaligned buffers, on + the other hand, will be handled by the driver. + + If Width is EfiCpuIoWidthUint8, EfiCpuIoWidthUint16, EfiCpuIoWidthUint32, + or EfiCpuIoWidthUint64, then both Address and Buffer are incremented for each of the + Count operations that is performed. + + If Width is EfiCpuIoWidthFifoUint8, EfiCpuIoWidthFifoUint16, + EfiCpuIoWidthFifoUint32, or EfiCpuIoWidthFifoUint64, then only Buffer is + incremented for each of the Count operations that is performed. The read or write operation is + performed Count times on the same Address. + + If Width is EfiCpuIoWidthFillUint8, EfiCpuIoWidthFillUint16, + EfiCpuIoWidthFillUint32, or EfiCpuIoWidthFillUint64, then only Address is + incremented for each of the Count operations that is performed. The read or write operation is + performed Count times from the first element of Buffer. + + @param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance. + @param[in] Width Signifies the width of the I/O or Memory operation. + @param[in] Address The base address of the I/O operation. The caller is responsible + for aligning the Address if required. + @param[in] Count The number of I/O operations to perform. The number of bytes moved + is Width size * Count, starting at Address. + @param[in, out] Buffer For read operations, the destination buffer to store the results. + For write operations, the source buffer from which to write data. + + @retval EFI_SUCCESS The data was read from or written to the EFI system. + @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system. Or Buffer is NULL. + @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width. + Or,The address range specified by Address, Width, and Count is not valid for this EFI system. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_CPU_IO_PROTOCOL_IO_MEM)( + IN EFI_CPU_IO2_PROTOCOL *This, + IN EFI_CPU_IO_PROTOCOL_WIDTH Width, + IN UINT64 Address, + IN UINTN Count, + IN OUT VOID *Buffer + ); + + +/// +/// Service for read and write accesses. +/// +typedef struct { + /// + /// This service provides the various modalities of memory and I/O read. + /// + EFI_CPU_IO_PROTOCOL_IO_MEM Read; + /// + /// This service provides the various modalities of memory and I/O write. + /// + EFI_CPU_IO_PROTOCOL_IO_MEM Write; +} EFI_CPU_IO_PROTOCOL_ACCESS; + + +/// +/// Provides the basic memory and I/O interfaces that are used to abstract +/// accesses to devices in a system. +/// +struct _EFI_CPU_IO2_PROTOCOL { + /// + /// Enables a driver to access memory-mapped registers in the EFI system memory space. + /// + EFI_CPU_IO_PROTOCOL_ACCESS Mem; + /// + /// Enables a driver to access registers in the EFI CPU I/O space. + /// + EFI_CPU_IO_PROTOCOL_ACCESS Io; +}; + +extern EFI_GUID gEfiCpuIo2ProtocolGuid; + +#endif diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec index 0471d72212..2840e84b5e 100644 --- a/MdePkg/MdePkg.dec +++ b/MdePkg/MdePkg.dec @@ -684,6 +684,9 @@ ## Include/Protocol/FirmwareVolumeBlock.h gEfiFirmwareVolumeBlock2ProtocolGuid = { 0x8f644fa9, 0xe850, 0x4db1, {0x9c, 0xe2, 0xb, 0x44, 0x69, 0x8e, 0x8d, 0xa4 } } + ## Include/Protocol/CpuIo2.h + gEfiCpuIo2ProtocolGuid = {0xad61f191, 0xae5f, 0x4c0e, {0xb9, 0xfa, 0xe8, 0x69, 0xd2, 0x88, 0xc6, 0x4f } } + # # Protocols defined in UEFI2.1/UEFI2.0/EFI1.1 # -- 2.39.2