mirror of https://github.com/acidanthera/audk.git
147 lines
5.4 KiB
C
147 lines
5.4 KiB
C
/** @file
|
|
Debug Communication Library definitions.
|
|
|
|
Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#ifndef __DEBUG_COMMUNICATION_LIB_H__
|
|
#define __DEBUG_COMMUNICATION_LIB_H__
|
|
|
|
typedef VOID * DEBUG_PORT_HANDLE;
|
|
|
|
/**
|
|
Caller provided function to be invoked at the end of DebugPortInitialize().
|
|
|
|
Refer to the description for DebugPortInitialize() for more details.
|
|
|
|
@param[in] Context The first input argument of DebugPortInitialize().
|
|
@param[in] DebugPortHandle Debug port handle created by Debug Communication Library.
|
|
|
|
**/
|
|
typedef
|
|
VOID
|
|
(EFIAPI * DEBUG_PORT_CONTINUE)(
|
|
IN VOID *Context,
|
|
IN DEBUG_PORT_HANDLE DebugPortHandle
|
|
);
|
|
|
|
/**
|
|
Initialize the debug port.
|
|
|
|
This function will initialize debug port to get it ready for data transmition. If
|
|
certain Debug Communication Library instance has to save some private data in the
|
|
stack, this function must work on the mode that doesn't return to the caller, then
|
|
the caller needs to wrap up all rest of logic after DebugPortInitialize() into one
|
|
function and pass it into DebugPortInitialize(). DebugPortInitialize() is
|
|
responsible to invoke the passing-in function at the end of DebugPortInitialize().
|
|
|
|
If the parameter Function is not NULL, Debug Communication Library instance will
|
|
invoke it by passing in the Context to be the first parameter. Debug Communication
|
|
Library instance could create one debug port handle to be the second parameter
|
|
passing into the Function. Debug Communication Library instance also could pass
|
|
NULL to be the second parameter if it doesn't create the debug port handle.
|
|
|
|
If the parameter Function is NULL, and Context is not NULL. At this time, Context
|
|
is the debug port handle created by the previous Debug Communication Library
|
|
instance.
|
|
a) If the instance can understand and continue use the private data of the previous
|
|
instance, it could return the same handle as passed in (as Context parameter).
|
|
b) If the instance does not understand, or does not want to continue use the
|
|
private data of the previous instance, it could ignore the input Context parameter
|
|
and create the new handle to be returned.
|
|
|
|
If Function() is NULL and Context is NULL, Debug Communication Library could create a
|
|
new handle and return it. NULL is also a valid handle to be returned.
|
|
|
|
@param[in] Context Context needed by callback function; it was optional.
|
|
@param[in] Function Continue function called by Debug Communication library;
|
|
it was optional.
|
|
|
|
@return The debug port handle created by Debug Communication Library if Function
|
|
is not NULL.
|
|
|
|
**/
|
|
DEBUG_PORT_HANDLE
|
|
EFIAPI
|
|
DebugPortInitialize (
|
|
IN VOID *Context,
|
|
IN DEBUG_PORT_CONTINUE Function
|
|
);
|
|
|
|
|
|
/**
|
|
Read data from debug device and save the datas in buffer.
|
|
|
|
Reads NumberOfBytes data bytes from a debug device into the buffer
|
|
specified by Buffer. The number of bytes actually read is returned.
|
|
If the return value is less than NumberOfBytes, then the rest operation failed.
|
|
If NumberOfBytes is zero, then return 0.
|
|
|
|
@param Handle Debug port handle.
|
|
@param Buffer Pointer to the data buffer to store the data read from the debug device.
|
|
@param NumberOfBytes Number of bytes which will be read.
|
|
@param Timeout Timeout value for reading from debug device. Its unit is Microsecond.
|
|
|
|
@retval 0 Read data failed, no data is to be read.
|
|
@retval >0 Actual number of bytes read from debug device.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
DebugPortReadBuffer (
|
|
IN DEBUG_PORT_HANDLE Handle,
|
|
IN UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes,
|
|
IN UINTN Timeout
|
|
);
|
|
|
|
|
|
/**
|
|
Write data from buffer to debug device.
|
|
|
|
Writes NumberOfBytes data bytes from Buffer to the debug device.
|
|
The number of bytes actually written to the debug device is returned.
|
|
If the return value is less than NumberOfBytes, then the write operation failed.
|
|
If NumberOfBytes is zero, then return 0.
|
|
|
|
@param Handle Debug port handle.
|
|
@param Buffer Pointer to the data buffer to be written.
|
|
@param NumberOfBytes Number of bytes to written to the debug device.
|
|
|
|
@retval 0 NumberOfBytes is 0.
|
|
@retval >0 The number of bytes written to the debug device.
|
|
If this value is less than NumberOfBytes, then the write operation failed.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
DebugPortWriteBuffer (
|
|
IN DEBUG_PORT_HANDLE Handle,
|
|
IN UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes
|
|
);
|
|
|
|
/**
|
|
Polls a debug device to see if there is any data waiting to be read.
|
|
|
|
Polls a debug device to see if there is any data waiting to be read.
|
|
If there is data waiting to be read from the debug device, then TRUE is returned.
|
|
If there is no data waiting to be read from the debug device, then FALSE is returned.
|
|
|
|
@param Handle Debug port handle.
|
|
|
|
@retval TRUE Data is waiting to be read from the debug device.
|
|
@retval FALSE There is no data waiting to be read from the debug device.
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
DebugPortPollBuffer (
|
|
IN DEBUG_PORT_HANDLE Handle
|
|
);
|
|
|
|
#endif
|
|
|