From cb2afd2eaac6a37e6efb33cb5d06e0394ae68f35 Mon Sep 17 00:00:00 2001 From: Kinsey Moore Date: Tue, 29 Sep 2020 19:54:20 -0500 Subject: bsps/shared: Add PSCI-based bspreset implementation This adds a bsp_reset implementation based on the ARM PSCI specification often present in ARMv8 systems. --- bsps/shared/start/bspreset-arm-psci.c | 56 +++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 bsps/shared/start/bspreset-arm-psci.c (limited to 'bsps/shared/start') diff --git a/bsps/shared/start/bspreset-arm-psci.c b/bsps/shared/start/bspreset-arm-psci.c new file mode 100644 index 0000000000..215be5c9b5 --- /dev/null +++ b/bsps/shared/start/bspreset-arm-psci.c @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file + * + * @ingroup RTEMSBSPsShared + * + * @brief PSCI-based BSP reset hook. + */ + +/* + * Copyright (C) 2020 On-Line Applications Research Corporation (OAR) + * Written by Kinsey Moore + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include + +void bsp_reset(void) +{ + uint32_t PSCI_FN_SYSTEM_RESET = 0x84000009; + __asm__ volatile( +#if defined(AARCH64_MULTILIB_ARCH_V8) || defined(AARCH64_MULTILIB_ARCH_V8_ILP32) + "mov x0, %0\n" +#else + "mov r0, %0\n" +#endif +#ifdef BSP_RESET_SMC + "smc #0\n" +#else + "hvc #0\n" +#endif + : : "r" (PSCI_FN_SYSTEM_RESET) + ); +} -- cgit v1.2.3