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-/** @file
- This code abstracts the CPU IO Protocol which installed by some platform or chipset-specific
- PEIM that abstracts the processor-visible I/O operations.
-
- Copyright (c) 2007, 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.
-
- Module Name: CpuIO.h
-
- @par Revision Reference:
- CPU IO Protocol is defined in Framework of EFI CPU IO Protocol Spec
- Version 0.9
-
-**/
-
-#ifndef _CPUIO_H_
-#define _CPUIO_H_
-
-#include <gpxe/efi/PiDxe.h>
-
-#define EFI_CPU_IO_PROTOCOL_GUID \
- { \
- 0xB0732526, 0x38C8, 0x4b40, {0x88, 0x77, 0x61, 0xC7, 0xB0, 0x6A, 0xAC, 0x45 } \
- }
-
-typedef struct _EFI_CPU_IO_PROTOCOL EFI_CPU_IO_PROTOCOL;
-
-//
-// *******************************************************
-// EFI_CPU_IO_PROTOCOL_WIDTH
-// *******************************************************
-//
-typedef enum {
- EfiCpuIoWidthUint8,
- EfiCpuIoWidthUint16,
- EfiCpuIoWidthUint32,
- EfiCpuIoWidthUint64,
- EfiCpuIoWidthFifoUint8,
- EfiCpuIoWidthFifoUint16,
- EfiCpuIoWidthFifoUint32,
- EfiCpuIoWidthFifoUint64,
- EfiCpuIoWidthFillUint8,
- EfiCpuIoWidthFillUint16,
- EfiCpuIoWidthFillUint32,
- EfiCpuIoWidthFillUint64,
- EfiCpuIoWidthMaximum
-} EFI_CPU_IO_PROTOCOL_WIDTH;
-
-//
-// *******************************************************
-// EFI_CPU_IO_PROTOCOL_IO_MEM
-// *******************************************************
-//
-/**
- Enables a driver to access memory-mapped registers in the EFI system memory space.
- Or, Enables a driver to access registers in the EFI CPU I/O space.
-
- @param This A pointer to the EFI_CPU_IO_PROTOCOL instance.
- @param Width Signifies the width of the I/O or Memory operation.
- @param Address The base address of the I/O or Memoryoperation.
- @param Count The number of I/O or Memory operations to perform.
- The number of bytes moved is Width size * Count, starting at Address.
- @param 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_IO_PROTOCOL *This,
- IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
- IN UINT64 Address,
- IN UINTN Count,
- IN OUT VOID *Buffer
- );
-
-//
-// *******************************************************
-// EFI_CPU_IO_PROTOCOL_ACCESS
-// *******************************************************
-//
-typedef struct {
- EFI_CPU_IO_PROTOCOL_IO_MEM Read;
- EFI_CPU_IO_PROTOCOL_IO_MEM Write;
-} EFI_CPU_IO_PROTOCOL_ACCESS;
-
-//
-// *******************************************************
-// EFI_CPU_IO_PROTOCOL
-// *******************************************************
-//
-/**
- @par Protocol Description:
- Provides the basic memory and I/O interfaces that are used to abstract
- accesses to devices in a system.
-
- @param Mem.Read
- Allows reads from memory-mapped I/O space.
-
- @param Mem.Write
- Allows writes to memory-mapped I/O space.
-
- @param Io.Read
- Allows reads from I/O space.
-
- @param Io.Write
- Allows writes to I/O space.
-
-**/
-struct _EFI_CPU_IO_PROTOCOL {
- EFI_CPU_IO_PROTOCOL_ACCESS Mem;
- EFI_CPU_IO_PROTOCOL_ACCESS Io;
-};
-
-extern EFI_GUID gEfiCpuIoProtocolGuid;
-
-#endif