CpuIo2Mm.c File Reference

#include "CpuIo2Mm.h"

Go to the source code of this file.

Functions
EFI_STATUS	CpuIoCheckParameter (IN BOOLEAN MmioOperation, IN EFI_SMM_IO_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN VOID *Buffer)
EFI_STATUS EFIAPI	CpuMemoryServiceRead (IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This, IN EFI_SMM_IO_WIDTH Width, IN UINT64 Address, IN UINTN Count, OUT VOID *Buffer)
EFI_STATUS EFIAPI	CpuMemoryServiceWrite (IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This, IN EFI_SMM_IO_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN VOID *Buffer)
EFI_STATUS EFIAPI	CpuIoServiceRead (IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This, IN EFI_SMM_IO_WIDTH Width, IN UINT64 Address, IN UINTN Count, OUT VOID *Buffer)
EFI_STATUS EFIAPI	CpuIoServiceWrite (IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This, IN EFI_SMM_IO_WIDTH Width, IN UINT64 Address, IN UINTN Count, IN VOID *Buffer)
EFI_STATUS	CommonCpuIo2Initialize (VOID)

Variables
EFI_HANDLE	mHandle = NULL
EFI_SMM_CPU_IO2_PROTOCOL	mSmmCpuIo2
UINT8	mStride []

Detailed Description

Produces the SMM CPU I/O Protocol.

Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file CpuIo2Mm.c.

Function Documentation

CommonCpuIo2Initialize()

EFI_STATUS CommonCpuIo2Initialize

(

VOID

)

The module Entry Point SmmCpuIoProtocol driver

Return values

EFI_SUCCESS	The entry point is executed successfully.
Other	Some error occurs when executing this entry point.

Definition at line 382 of file CpuIo2Mm.c.

CpuIoCheckParameter()

EFI_STATUS CpuIoCheckParameter	(	IN BOOLEAN	MmioOperation,
		IN EFI_SMM_IO_WIDTH	Width,
		IN UINT64	Address,
		IN UINTN	Count,
		IN VOID *	Buffer
	)

Check parameters to a SMM CPU I/O Protocol service request.

Parameters

[in]	MmioOperation	TRUE for an MMIO operation, FALSE for I/O Port operation.
[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]	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.

Definition at line 58 of file CpuIo2Mm.c.

CpuIoServiceRead()

EFI_STATUS EFIAPI CpuIoServiceRead	(	IN CONST EFI_SMM_CPU_IO2_PROTOCOL *	This,
		IN EFI_SMM_IO_WIDTH	Width,
		IN UINT64	Address,
		IN UINTN	Count,
		OUT VOID *	Buffer
	)

Reads I/O registers.

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_SMM_CPU_IO2_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.
[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

Definition at line 278 of file CpuIo2Mm.c.

CpuIoServiceWrite()

EFI_STATUS EFIAPI CpuIoServiceWrite	(	IN CONST EFI_SMM_CPU_IO2_PROTOCOL *	This,
		IN EFI_SMM_IO_WIDTH	Width,
		IN UINT64	Address,
		IN UINTN	Count,
		IN VOID *	Buffer
	)

Write I/O registers.

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_SMM_CPU_IO2_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]	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

Definition at line 337 of file CpuIo2Mm.c.

CpuMemoryServiceRead()

EFI_STATUS EFIAPI CpuMemoryServiceRead	(	IN CONST EFI_SMM_CPU_IO2_PROTOCOL *	This,
		IN EFI_SMM_IO_WIDTH	Width,
		IN UINT64	Address,
		IN UINTN	Count,
		OUT VOID *	Buffer
	)

Reads memory-mapped registers.

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_SMM_CPU_IO2_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.
[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

Definition at line 156 of file CpuIo2Mm.c.

CpuMemoryServiceWrite()

EFI_STATUS EFIAPI CpuMemoryServiceWrite	(	IN CONST EFI_SMM_CPU_IO2_PROTOCOL *	This,
		IN EFI_SMM_IO_WIDTH	Width,
		IN UINT64	Address,
		IN UINTN	Count,
		IN VOID *	Buffer
	)

Writes memory-mapped registers.

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_SMM_CPU_IO2_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]	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

Definition at line 217 of file CpuIo2Mm.c.

Variable Documentation

mHandle

EFI_HANDLE mHandle = NULL

Handle for the Capsule Update Policy Protocol

Definition at line 14 of file CpuIo2Mm.c.

mSmmCpuIo2

EFI_SMM_CPU_IO2_PROTOCOL mSmmCpuIo2

Initial value:

= {
  {
    CpuMemoryServiceRead,
    CpuMemoryServiceWrite
  },
  {
    CpuIoServiceRead,
    CpuIoServiceWrite
  }
}

Definition at line 19 of file CpuIo2Mm.c.

mStride

UINT8 mStride[]

Initial value:

= {
  1, 
  2, 
  4, 
  8  
}

Definition at line 33 of file CpuIo2Mm.c.