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Classes | |
| struct | EFI_MM_IO_ACCESS |
| struct | _EFI_MM_CPU_IO_PROTOCOL |
Macros | |
| #define | EFI_MM_CPU_IO_PROTOCOL_GUID |
Typedefs | |
| typedef struct _EFI_MM_CPU_IO_PROTOCOL | EFI_MM_CPU_IO_PROTOCOL |
| typedef EFI_STATUS(EFIAPI * | EFI_MM_CPU_IO) (IN CONST EFI_MM_CPU_IO_PROTOCOL *This, IN EFI_MM_IO_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN OUT VOID *Buffer) |
Enumerations | |
| enum | EFI_MM_IO_WIDTH { MM_IO_UINT8 = 0 , MM_IO_UINT16 = 1 , MM_IO_UINT32 = 2 , MM_IO_UINT64 = 3 } |
Variables | |
| EFI_GUID | gEfiMmCpuIoProtocolGuid |
Detailed Description
MM CPU I/O 2 protocol as defined in the PI 1.5 specification.
This protocol provides CPU I/O and memory access within MM.
Copyright (c) 2017, 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.
Macro Definition Documentation
◆ EFI_MM_CPU_IO_PROTOCOL_GUID
| #define EFI_MM_CPU_IO_PROTOCOL_GUID |
Typedef Documentation
◆ EFI_MM_CPU_IO
| typedef EFI_STATUS(EFIAPI * EFI_MM_CPU_IO) (IN CONST EFI_MM_CPU_IO_PROTOCOL *This, IN EFI_MM_IO_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN OUT VOID *Buffer) |
Provides the basic memory and I/O interfaces used toabstract accesses to devices.
The I/O operations are carried out exactly as requested. The caller is responsible for any alignment and I/O width issues that the bus, device, platform, or type of I/O might require.
- Parameters
-
[in] This The EFI_MM_CPU_IO_PROTOCOL instance. [in] Width Signifies the width of the I/O operations. [in] Address The base address of the I/O operations. The caller is responsible for aligning the Address if required. [in] Count The number of I/O operations to perform. [in,out] Buffer For read operations, the destination buffer to store the results. For write operations, the source buffer from which to write data.
- Return values
-
EFI_SUCCESS The data was read from or written to the device. EFI_UNSUPPORTED The Address is not valid for this system. EFI_INVALID_PARAMETER Width or Count, or both, were invalid. EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
◆ EFI_MM_CPU_IO_PROTOCOL
| typedef struct _EFI_MM_CPU_IO_PROTOCOL EFI_MM_CPU_IO_PROTOCOL |
Enumeration Type Documentation
◆ EFI_MM_IO_WIDTH
| enum EFI_MM_IO_WIDTH |
Variable Documentation
◆ gEfiMmCpuIoProtocolGuid
|
extern |
