gen83xx/include/tm27.h

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @brief Support file for Timer Test 27.
0007  */
0008
0009 /*
0010  * Copyright (c) 2008 embedded brains GmbH & Co. KG
0011  * Redistribution and use in source and binary forms, with or without
0012  * modification, are permitted provided that the following conditions
0013  * are met:
0014  * 1. Redistributions of source code must retain the above copyright
0015  *    notice, this list of conditions and the following disclaimer.
0016  * 2. Redistributions in binary form must reproduce the above copyright
0017  *    notice, this list of conditions and the following disclaimer in the
0018  *    documentation and/or other materials provided with the distribution.
0019  *
0020  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0021  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0022  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0023  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0024  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0025  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0026  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0027  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0028  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0029  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0030  * POSSIBILITY OF SUCH DAMAGE.
0031  */
0032
0033 #ifndef _RTEMS_TMTEST27
0034   #error "This is an RTEMS internal file you must not include directly."
0035 #endif /* _RTEMS_TMTEST27 */
0036
0037 #ifndef TMTESTS_TM27_H
0038 #define TMTESTS_TM27_H
0039
0040 #include <libcpu/powerpc-utility.h>
0041 #include <bsp/vectors.h>
0042
0043 #define MUST_WAIT_FOR_INTERRUPT 1
0044
0045 static rtems_interrupt_handler tm27_interrupt_handler;
0046
0047 static int tm27_exception_handler( BSP_Exception_frame *frame, unsigned number)
0048 {
0049     (*tm27_interrupt_handler)( NULL);
0050
0051     return 0;
0052 }
0053
0054 static inline void Install_tm27_vector( rtems_interrupt_handler handler )
0055 {
0056   int rv = 0;
0057
0058   tm27_interrupt_handler = handler;
0059
0060   rv = ppc_exc_set_handler( ASM_DEC_VECTOR, tm27_exception_handler);
0061   if (rv < 0) {
0062     printk( "Error installing clock interrupt handler!\n");
0063   }
0064 }
0065
0066 #define Cause_tm27_intr() \
0067   ppc_set_decrementer_register( 8)
0068
0069 #define Clear_tm27_intr() \
0070   ppc_set_decrementer_register( UINT32_MAX)
0071
0072 #define Lower_tm27_intr() \
0073   (void) ppc_external_exceptions_enable()
0074
0075 #endif /* TMTESTS_TM27_H */