#include <Base.h>
#include <Library/SerialPortLib.h>
#include <Library/BaseRiscVSbiLib.h>
#include "Common.h"

Functions
STATIC BOOLEAN	SbiImplementsLegacyGetchar (VOID)

RETURN_STATUS EFIAPI	SerialPortInitialize (VOID)

UINTN EFIAPI	SerialPortWrite (IN UINT8 *Buffer, IN UINTN NumberOfBytes)

UINTN EFIAPI	SerialPortRead (OUT UINT8 *Buffer, IN UINTN NumberOfBytes)

BOOLEAN EFIAPI	SerialPortPoll (VOID)

RETURN_STATUS EFIAPI	SerialPortSetControl (IN UINT32 Control)

RETURN_STATUS EFIAPI	SerialPortGetControl (OUT UINT32 *Control)

RETURN_STATUS EFIAPI	SerialPortSetAttributes (IN OUT UINT64 BaudRate, IN OUT UINT32 ReceiveFifoDepth, IN OUT UINT32 Timeout, IN OUT EFI_PARITY_TYPE Parity, IN OUT UINT8 DataBits, IN OUT EFI_STOP_BITS_TYPE StopBits)

Variables
STATIC BOOLEAN	mHaveDbcn = FALSE

STATIC BOOLEAN	mHaveLegacyPutchar = FALSE

STATIC BOOLEAN	mHaveLegacyGetchar = FALSE

STATIC INT64	mLastGetChar = -1

Detailed Description

Serial Port Library backed by SBI console.

Meant for PrePi and DXE environments (where globals are allowed). See BaseSerialPortLibRiscVSbiLib.c for a reduced variant appropriate for SEC and PEI (XIP) environments.

Copyright (c) 2023, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file BaseSerialPortLibRiscVSbiLibRam.c.

Function Documentation

◆ SbiImplementsLegacyGetchar()

STATIC BOOLEAN SbiImplementsLegacyGetchar ( VOID )

Return whether the legacy console getchar extension is implemented.

Return values

TRUE	Extension is implemented.
FALSE	Extension is not implemented.

Definition at line 32 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ SerialPortGetControl()

RETURN_STATUS EFIAPI SerialPortGetControl ( OUT UINT32 * Control )

Retrieve the status of the control bits on a serial device.

Parameters

Control A pointer to return the current control signals from the serial device.

Return values

RETURN_SUCCESS	The control bits were read from the serial device.
RETURN_UNSUPPORTED	The serial device does not support this operation.
RETURN_DEVICE_ERROR	The serial device is not functioning correctly.

Definition at line 236 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ SerialPortInitialize()

RETURN_STATUS EFIAPI SerialPortInitialize ( VOID )

Initialize the serial device hardware.

If no initialization is required, then return RETURN_SUCCESS. If the serial device was successfully initialized, then return RETURN_SUCCESS. If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.

Return values

RETURN_SUCCESS	The serial device was initialized.
RETURN_DEVICE_ERROR	The serial device could not be initialized.

Definition at line 61 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ SerialPortPoll()

BOOLEAN EFIAPI SerialPortPoll ( VOID )

Polls a serial device to see if there is any data waiting to be read.

Polls a serial device to see if there is any data waiting to be read. If there is data waiting to be read from the serial device, then TRUE is returned. If there is no data waiting to be read from the serial device, then FALSE is returned.

Return values

TRUE	Data is waiting to be read from the serial device.
FALSE	There is no data waiting to be read from the serial device.

Definition at line 168 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ SerialPortRead()

UINTN EFIAPI SerialPortRead	(	OUT UINT8 *	Buffer,
		IN UINTN	NumberOfBytes
	)

Read data from serial device and save the datas in buffer.

Reads NumberOfBytes data bytes from a serial 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.

Parameters

Buffer	The pointer to the data buffer to store the data read from the serial device.
NumberOfBytes	The number of bytes which will be read.

Return values

0	Read data failed; No data is to be read.
>0	The actual number of bytes read from serial device.

Definition at line 139 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ SerialPortSetAttributes()

RETURN_STATUS EFIAPI SerialPortSetAttributes	(	IN OUT UINT64 *	BaudRate,
		IN OUT UINT32 *	ReceiveFifoDepth,
		IN OUT UINT32 *	Timeout,
		IN OUT EFI_PARITY_TYPE *	Parity,
		IN OUT UINT8 *	DataBits,
		IN OUT EFI_STOP_BITS_TYPE *	StopBits
	)

Sets the baud rate, receive FIFO depth, transmit/receice time out, parity, data bits, and stop bits on a serial device.

Parameters

BaudRate	The requested baud rate. A BaudRate value of 0 will use the device's default interface speed. On output, the value actually set.
ReveiveFifoDepth	The requested depth of the FIFO on the receive side of the serial interface. A ReceiveFifoDepth value of 0 will use the device's default FIFO depth. On output, the value actually set.
Timeout	The requested time out for a single character in microseconds. This timeout applies to both the transmit and receive side of the interface. A Timeout value of 0 will use the device's default time out value. On output, the value actually set.
Parity	The type of parity to use on this serial device. A Parity value of DefaultParity will use the device's default parity value. On output, the value actually set.
DataBits	The number of data bits to use on the serial device. A DataBits vaule of 0 will use the device's default data bit setting. On output, the value actually set.
StopBits	The number of stop bits to use on this serial device. A StopBits value of DefaultStopBits will use the device's default number of stop bits. On output, the value actually set.

Return values

RETURN_SUCCESS	The new attributes were set on the serial device.
RETURN_UNSUPPORTED	The serial device does not support this operation.
RETURN_INVALID_PARAMETER	One or more of the attributes has an unsupported value.
RETURN_DEVICE_ERROR	The serial device is not functioning correctly.

Definition at line 279 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ SerialPortSetControl()

RETURN_STATUS EFIAPI SerialPortSetControl ( IN UINT32 Control )

Sets the control bits on a serial device.

Parameters

Control Sets the bits of Control that are settable.

Return values

RETURN_SUCCESS	The new control bits were set on the serial device.
RETURN_UNSUPPORTED	The serial device does not support this operation.
RETURN_DEVICE_ERROR	The serial device is not functioning correctly.

Definition at line 217 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ SerialPortWrite()

UINTN EFIAPI SerialPortWrite	(	IN UINT8 *	Buffer,
		IN UINTN	NumberOfBytes
	)

Write data from buffer to serial device.

Writes NumberOfBytes data bytes from Buffer to the serial device. The number of bytes actually written to the serial device is returned. If the return value is less than NumberOfBytes, then the write operation failed. If NumberOfBytes is zero, then return 0.

Parameters

Buffer	The pointer to the data buffer to be written.
NumberOfBytes	The number of bytes to written to the serial device.

Return values

0	NumberOfBytes is 0.
>0	The number of bytes written to the serial device. If this value is less than NumberOfBytes, then the write operation failed.

Definition at line 101 of file BaseSerialPortLibRiscVSbiLibRam.c.

Variable Documentation

◆ mHaveDbcn

STATIC BOOLEAN mHaveDbcn = FALSE

Definition at line 18 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ mHaveLegacyGetchar

STATIC BOOLEAN mHaveLegacyGetchar = FALSE

Definition at line 20 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ mHaveLegacyPutchar

STATIC BOOLEAN mHaveLegacyPutchar = FALSE

Definition at line 19 of file BaseSerialPortLibRiscVSbiLibRam.c.

◆ mLastGetChar

STATIC INT64 mLastGetChar = -1

Definition at line 21 of file BaseSerialPortLibRiscVSbiLibRam.c.

Functions

Variables

Detailed Description

Function Documentation

◆ SbiImplementsLegacyGetchar()

◆ SerialPortGetControl()

◆ SerialPortInitialize()

◆ SerialPortPoll()

◆ SerialPortRead()

◆ SerialPortSetAttributes()

◆ SerialPortSetControl()

◆ SerialPortWrite()

Variable Documentation

◆ mHaveDbcn

◆ mHaveLegacyGetchar

◆ mHaveLegacyPutchar

◆ mLastGetChar