shared/start/bspreset-arm-psci.S

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSBSPsShared
0007  *
0008  * @brief This source file contains the PSCI-based bsp_reset() implementation.
0009  */
0010
0011 /*
0012  * Copyright (C) 2024 embedded brains GmbH & Co. KG
0013  *
0014  * Copyright (C) 2020 On-Line Applications Research Corporation (OAR)
0015  * Written by Kinsey Moore <kinsey.moore@oarcorp.com>
0016  *
0017  * Redistribution and use in source and binary forms, with or without
0018  * modification, are permitted provided that the following conditions
0019  * are met:
0020  * 1. Redistributions of source code must retain the above copyright
0021  *    notice, this list of conditions and the following disclaimer.
0022  * 2. Redistributions in binary form must reproduce the above copyright
0023  *    notice, this list of conditions and the following disclaimer in the
0024  *    documentation and/or other materials provided with the distribution.
0025  *
0026  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0027  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0028  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0029  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0030  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0031  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0032  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0033  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0034  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0035  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0036  * POSSIBILITY OF SUCH DAMAGE.
0037  */
0038
0039 #include <bsp.h>
0040
0041 #include <rtems/asm.h>
0042
0043 FUNCTION_ENTRY(bsp_reset)
0044
0045     /* PSCI_FN_SYSTEM_RESET = 0x84000009 */
0046     mov x0, 9
0047     movk    x0, 0x8400, lsl 16
0048
0049 #ifdef BSP_RESET_SMC
0050     smc #0
0051 #else
0052     hvc #0
0053 #endif
0054
0055 FUNCTION_END(bsp_reset)