noel/start/bsp_fatal_halt.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * Copyright (C) 2021 Cobham Gaisler AB
0005  *
0006  * Redistribution and use in source and binary forms, with or without
0007  * modification, are permitted provided that the following conditions
0008  * are met:
0009  * 1. Redistributions of source code must retain the above copyright
0010  *    notice, this list of conditions and the following disclaimer.
0011  * 2. Redistributions in binary form must reproduce the above copyright
0012  *    notice, this list of conditions and the following disclaimer in the
0013  *    documentation and/or other materials provided with the distribution.
0014  *
0015  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0016  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0017  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0018  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0019  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0020  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0021  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0024  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0025  * POSSIBILITY OF SUCH DAMAGE.
0026  */
0027
0028 #include <bsp/bootcard.h>
0029
0030 #include <bsp/riscv.h>
0031
0032 /* From bsps/arm/fvp/include/bsp/semihosting.h */
0033 #define TARGET_SYS_EXIT_EXTENDED 0x20
0034 #define ADP_Stopped_ApplicationExit 0x20026
0035
0036 void bsp_reset( rtems_fatal_source source, rtems_fatal_code code )
0037 {
0038   uint64_t args[2] = {ADP_Stopped_ApplicationExit, code};
0039   __asm__ volatile ("li a0, %0" ::"i"(TARGET_SYS_EXIT_EXTENDED));
0040   __asm__ volatile ("mv a1, %0" ::"r"(&args));
0041   __asm__ volatile ("slli zero, zero, 0x1f");
0042   __asm__ volatile ("ebreak");
0043   __asm__ volatile ("srai zero, zero, 0x7");
0044   RTEMS_UNREACHABLE();
0045 }