mirror of https://github.com/acidanthera/audk.git
97 lines
3.4 KiB
C
97 lines
3.4 KiB
C
/** @file
|
|
SMM CPU I/O protocol as defined in the PI 1.2 specification.
|
|
|
|
This protocol provides CPU I/O and memory access within SMM.
|
|
|
|
Copyright (c) 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.
|
|
|
|
**/
|
|
|
|
#ifndef _SMM_CPU_IO_H_
|
|
#define _SMM_CPU_IO_H_
|
|
|
|
///
|
|
/// Note:
|
|
/// To avoid name conflict between PI and Framework SMM spec, the following names defined
|
|
/// in PI 1.2 SMM spec are renamed. These renamings are not yet in a public PI spec and errta.
|
|
///
|
|
/// EFI_SMM_CPU_IO -> EFI_SMM_CPU_IO2
|
|
/// EFI_SMM_IO_ACCESS -> EFI_SMM_IO_ACCESS2
|
|
///
|
|
|
|
#define EFI_SMM_CPU_IO_PROTOCOL_GUID \
|
|
{ \
|
|
0x3242A9D8, 0xCE70, 0x4AA0, { 0x95, 0x5D, 0x5E, 0x7B, 0x14, 0x0D, 0xE4, 0xD2 } \
|
|
}
|
|
|
|
typedef struct _EFI_SMM_CPU_IO_PROTOCOL EFI_SMM_CPU_IO_PROTOCOL;
|
|
|
|
///
|
|
/// Width of the SMM CPU I/O operations
|
|
///
|
|
typedef enum {
|
|
SMM_IO_UINT8 = 0,
|
|
SMM_IO_UINT16 = 1,
|
|
SMM_IO_UINT32 = 2,
|
|
SMM_IO_UINT64 = 3
|
|
} EFI_SMM_IO_WIDTH;
|
|
|
|
/**
|
|
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.
|
|
|
|
@param[in] This The EFI_SMM_CPU_IO_PROTOCOL instance.
|
|
@param[in] Width Signifies the width of the I/O operations.
|
|
@param[in] Address The base address of the I/O operations.
|
|
The caller is responsible for aligning the Address if required.
|
|
@param[in] Count The number of I/O operations to perform.
|
|
@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 device.
|
|
@retval EFI_UNSUPPORTED The Address is not valid for this system.
|
|
@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
|
|
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_SMM_CPU_IO2)(
|
|
IN CONST EFI_SMM_CPU_IO_PROTOCOL *This,
|
|
IN EFI_SMM_IO_WIDTH Width,
|
|
IN UINT64 Address,
|
|
IN UINTN Count,
|
|
IN OUT VOID *Buffer
|
|
);
|
|
|
|
typedef struct {
|
|
///
|
|
/// This service provides the various modalities of memory and I/O read.
|
|
///
|
|
EFI_SMM_CPU_IO2 Read;
|
|
///
|
|
/// This service provides the various modalities of memory and I/O write.
|
|
///
|
|
EFI_SMM_CPU_IO2 Write;
|
|
} EFI_SMM_IO_ACCESS2;
|
|
|
|
///
|
|
/// SMM CPU I/O Protocol provides CPU I/O and memory access within SMM.
|
|
///
|
|
struct _EFI_SMM_CPU_IO_PROTOCOL {
|
|
EFI_SMM_IO_ACCESS2 Mem; ///< Allows reads and writes to memory-mapped I/O space.
|
|
EFI_SMM_IO_ACCESS2 Io; ///< Allows reads and writes to I/O space.
|
|
};
|
|
|
|
extern EFI_GUID gEfiSmmCpuIoProtocolGuid;
|
|
|
|
#endif
|