jmr3904/clock/clockdrv.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  *  @file
0005  *
0006  *  Instantiate the clock driver shell.
0007  *
0008  *  The TX3904 simulator in gdb counts instructions.
0009  */
0010
0011 /*
0012  *  COPYRIGHT (c) 1989-2012.
0013  *  On-Line Applications Research Corporation (OAR).
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #include <rtems.h>
0038 #include <bsp/irq.h>
0039 #include <bsp.h>
0040
0041 #define CLOCK_DRIVER_USE_FAST_IDLE 1
0042
0043 #define CLOCK_VECTOR TX3904_IRQ_TMR0
0044
0045 /*
0046  *  5000 clicks per tick ISR is HIGHLY arbitrary
0047  */
0048
0049 #define CLICKS 5000
0050
0051 #define Clock_driver_support_install_isr( _new ) \
0052   rtems_interrupt_handler_install( CLOCK_VECTOR, "clock", 0, _new, NULL )
0053
0054 #define Clock_driver_support_initialize_hardware() \
0055   do { \
0056     uint32_t   _clicks = CLICKS; \
0057     TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_CCDR, 0x3 ); \
0058     TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_CPRA, _clicks ); \
0059     TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_TISR, 0x00 ); \
0060     TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_ITMR, 0x8001 ); \
0061     TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_TCR,   0xC0 ); \
0062     *((volatile uint32_t*) 0xFFFFC01C) = 0x00000700; \
0063   } while(0)
0064
0065 #define CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER
0066
0067 #include "../../../shared/dev/clock/clockimpl.h"