mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-09-25 23:47:19 +08:00
microblaze: Rework for RTEMS 6
This reworks the existing MicroBlaze architecture port and BSP to achieve basic functionality using the latest RTEMS APIs.
This commit is contained in:
Alex White
committed by
Joel Sherrill
Joel Sherrill
parent
0f62af0ef8
commit
d03776e804
@@ -0,0 +1,145 @@
|
||||
/* SPDX-License-Identifier: BSD-2-Clause */
|
||||
|
||||
/**
|
||||
* @file
|
||||
*
|
||||
* @ingroup RTEMSBSPsMicroblaze
|
||||
*
|
||||
* @brief MicroBlaze AXI UART Lite support
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2021 On-Line Applications Research Corporation (OAR)
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <bsp/irq.h>
|
||||
#include <dev/serial/uartlite.h>
|
||||
|
||||
#ifdef BSP_MICROBLAZE_FPGA_CONSOLE_INTERRUPTS
|
||||
static void microblaze_uart_interrupt( void *arg )
|
||||
{
|
||||
rtems_termios_tty *tty = arg;
|
||||
uart_lite_context *ctx = rtems_termios_get_device_context( tty );
|
||||
|
||||
while ( !XUartLite_IsReceiveEmpty( ctx->address ) ) {
|
||||
char c = (char) XUartLite_ReadReg( ctx->address, XUL_RX_FIFO_OFFSET );
|
||||
rtems_termios_enqueue_raw_characters( tty, &c, 1 );
|
||||
}
|
||||
|
||||
while ( ctx->transmitting && !XUartLite_IsTransmitEmpty( ctx ) ) {
|
||||
rtems_termios_dequeue_characters( tty, 1 );
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
static bool uart_first_open(
|
||||
struct rtems_termios_tty *tty,
|
||||
rtems_termios_device_context *base,
|
||||
struct termios *term,
|
||||
rtems_libio_open_close_args_t *args
|
||||
)
|
||||
{
|
||||
uart_lite_context *ctx = (uart_lite_context *) base;
|
||||
#ifdef BSP_MICROBLAZE_FPGA_CONSOLE_INTERRUPTS
|
||||
rtems_status_code sc;
|
||||
#endif
|
||||
|
||||
rtems_termios_set_initial_baud( tty, ctx->initial_baud );
|
||||
|
||||
#ifdef BSP_MICROBLAZE_FPGA_CONSOLE_INTERRUPTS
|
||||
XUartLite_EnableIntr( ctx->address );
|
||||
sc = rtems_interrupt_handler_install(
|
||||
1,
|
||||
"UART",
|
||||
RTEMS_INTERRUPT_SHARED,
|
||||
microblaze_uart_interrupt,
|
||||
tty
|
||||
);
|
||||
if ( sc != RTEMS_SUCCESSFUL ) {
|
||||
return false;
|
||||
}
|
||||
#endif
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static void uart_last_close(
|
||||
rtems_termios_tty *tty,
|
||||
rtems_termios_device_context *base,
|
||||
rtems_libio_open_close_args_t *args
|
||||
)
|
||||
{
|
||||
#ifdef BSP_MICROBLAZE_FPGA_CONSOLE_INTERRUPTS
|
||||
rtems_interrupt_handler_remove( 1, microblaze_uart_interrupt, tty );
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifndef BSP_MICROBLAZE_FPGA_CONSOLE_INTERRUPTS
|
||||
static int uart_read_polled( rtems_termios_device_context *base )
|
||||
{
|
||||
uart_lite_context *ctx = (uart_lite_context *) base;
|
||||
|
||||
if ( XUartLite_IsReceiveEmpty( ctx->address ) ) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
return XUartLite_ReadReg( ctx->address, XUL_RX_FIFO_OFFSET );
|
||||
}
|
||||
#endif
|
||||
|
||||
static void uart_write(
|
||||
rtems_termios_device_context *base,
|
||||
const char *s,
|
||||
size_t n
|
||||
)
|
||||
{
|
||||
uart_lite_context *ctx = (uart_lite_context *) base;
|
||||
|
||||
#ifdef BSP_MICROBLAZE_FPGA_CONSOLE_INTERRUPTS
|
||||
if ( n > 0 ) {
|
||||
ctx->transmitting = true;
|
||||
XUartLite_SendByte( ctx->address, s[0] );
|
||||
} else {
|
||||
ctx->transmitting = false;
|
||||
}
|
||||
#else
|
||||
size_t i = 0;
|
||||
|
||||
for ( i = 0; i < n; ++i ) {
|
||||
XUartLite_SendByte( ctx->address, s[i] );
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
const rtems_termios_device_handler microblaze_uart_fns = {
|
||||
.first_open = uart_first_open,
|
||||
.last_close = uart_last_close,
|
||||
.write = uart_write,
|
||||
#ifdef BSP_MICROBLAZE_FPGA_CONSOLE_INTERRUPTS
|
||||
.mode = TERMIOS_IRQ_DRIVEN
|
||||
#else
|
||||
.poll_read = uart_read_polled,
|
||||
.mode = TERMIOS_POLLED
|
||||
#endif
|
||||
};
|
||||
@@ -0,0 +1,99 @@
|
||||
/******************************************************************************
|
||||
* Copyright (C) 2002 - 2020 Xilinx, Inc. All rights reserved.
|
||||
* SPDX-License-Identifier: MIT
|
||||
******************************************************************************/
|
||||
|
||||
/****************************************************************************/
|
||||
/**
|
||||
*
|
||||
* @file xuartlite_l.c
|
||||
* @addtogroup uartlite_v3_5
|
||||
* @{
|
||||
*
|
||||
* This file contains low-level driver functions that can be used to access the
|
||||
* device. The user should refer to the hardware device specification for more
|
||||
* details of the device operation.
|
||||
|
||||
* <pre>
|
||||
* MODIFICATION HISTORY:
|
||||
*
|
||||
* Ver Who Date Changes
|
||||
* ----- ---- -------- -----------------------------------------------
|
||||
* 1.00b rpm 04/25/02 First release
|
||||
* 1.12a rpm 07/16/07 Fixed arg type for RecvByte
|
||||
* 2.00a ktn 10/20/09 The macros have been renamed to remove _m from the name.
|
||||
* 3.2 sk 11/10/15 Used UINTPTR instead of u32 for Baseaddress CR# 867425.
|
||||
* Changed the prototypes of XUartLite_SendByte,
|
||||
* XUartLite_RecvByte APIs.
|
||||
* </pre>
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
/***************************** Include Files *********************************/
|
||||
|
||||
#ifndef __rtems__
|
||||
#include "xuartlite_l.h"
|
||||
#else
|
||||
#include <dev/serial/uartlite_l.h>
|
||||
#endif /* __rtems__ */
|
||||
|
||||
/************************** Constant Definitions *****************************/
|
||||
|
||||
|
||||
/**************************** Type Definitions *******************************/
|
||||
|
||||
|
||||
/***************** Macros (Inline Functions) Definitions *********************/
|
||||
|
||||
|
||||
/************************** Function Prototypes ******************************/
|
||||
|
||||
|
||||
/************************** Variable Prototypes ******************************/
|
||||
|
||||
|
||||
/****************************************************************************/
|
||||
/**
|
||||
*
|
||||
* This functions sends a single byte using the UART. It is blocking in that it
|
||||
* waits for the transmitter to become non-full before it writes the byte to
|
||||
* the transmit register.
|
||||
*
|
||||
* @param BaseAddress is the base address of the device
|
||||
* @param Data is the byte of data to send
|
||||
*
|
||||
* @return None.
|
||||
*
|
||||
* @note None.
|
||||
*
|
||||
******************************************************************************/
|
||||
void XUartLite_SendByte(UINTPTR BaseAddress, u8 Data)
|
||||
{
|
||||
while (XUartLite_IsTransmitFull(BaseAddress));
|
||||
|
||||
XUartLite_WriteReg(BaseAddress, XUL_TX_FIFO_OFFSET, Data);
|
||||
}
|
||||
|
||||
|
||||
/****************************************************************************/
|
||||
/**
|
||||
*
|
||||
* This functions receives a single byte using the UART. It is blocking in that
|
||||
* it waits for the receiver to become non-empty before it reads from the
|
||||
* receive register.
|
||||
*
|
||||
* @param BaseAddress is the base address of the device
|
||||
*
|
||||
* @return The byte of data received.
|
||||
*
|
||||
* @note None.
|
||||
*
|
||||
******************************************************************************/
|
||||
u8 XUartLite_RecvByte(UINTPTR BaseAddress)
|
||||
{
|
||||
while (XUartLite_IsReceiveEmpty(BaseAddress));
|
||||
|
||||
return (u8)XUartLite_ReadReg(BaseAddress, XUL_RX_FIFO_OFFSET);
|
||||
}
|
||||
|
||||
/** @} */
|
||||
Reference in New Issue
Block a user