shared/clock/clockdrv.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  *  COPYRIGHT (c) 1989-2013.
0005  *  On-Line Applications Research Corporation (OAR).
0006  *
0007  * Redistribution and use in source and binary forms, with or without
0008  * modification, are permitted provided that the following conditions
0009  * are met:
0010  * 1. Redistributions of source code must retain the above copyright
0011  *    notice, this list of conditions and the following disclaimer.
0012  * 2. Redistributions in binary form must reproduce the above copyright
0013  *    notice, this list of conditions and the following disclaimer in the
0014  *    documentation and/or other materials provided with the distribution.
0015  *
0016  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0017  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0018  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0019  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0020  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0021  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0022  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0023  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0024  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0025  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0026  * POSSIBILITY OF SUCH DAMAGE.
0027  */
0028
0029 #include <bsp.h>
0030 #include <bsp/irq.h>
0031 #include <bspopts.h>
0032
0033 /* XXX convert to macros? Move to score/cpu? */
0034 void mips_set_timer(uint32_t timer_clock_interval);
0035 uint32_t mips_get_timer(void);
0036
0037 /* XXX move to BSP.h or irq.h?? */
0038 #define EXT_INT5             0x8000  /* external interrupt 5 */
0039 #define CLOCK_VECTOR_MASK    EXT_INT5
0040 #define CLOCK_VECTOR         (MIPS_INTERRUPT_BASE+0x7)
0041
0042 extern uint32_t bsp_clicks_per_microsecond;
0043
0044 static uint32_t mips_timer_rate = 0;
0045
0046 /* refresh the internal CPU timer */
0047 #define Clock_driver_support_at_tick(arg) \
0048   mips_set_timer( mips_timer_rate );
0049
0050 #define Clock_driver_support_install_isr( _new ) \
0051   rtems_interrupt_handler_install(CLOCK_VECTOR, "PIT clock",0, _new, NULL)
0052
0053 #define Clock_driver_support_initialize_hardware() \
0054   do { \
0055     mips_timer_rate = rtems_configuration_get_microseconds_per_tick() * \
0056       bsp_clicks_per_microsecond; \
0057     mips_set_timer( mips_timer_rate ); \
0058     mips_enable_in_interrupt_mask(CLOCK_VECTOR_MASK); \
0059   } while(0)
0060
0061 #define CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER
0062
0063 #include "../../../shared/dev/clock/clockimpl.h"