1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2016, Linaro Limited 4 * Copyright (c) 2014, STMicroelectronics International N.V. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #include <arm.h> 30 #include <compiler.h> 31 #include <kernel/misc.h> 32 #include <platform_config.h> 33 #include <sm/optee_smc.h> 34 #include <sm/sm.h> 35 #include <sm/std_smc.h> 36 #include <string.h> 37 #include "sm_private.h" 38 39 bool sm_from_nsec(struct sm_ctx *ctx) 40 { 41 uint32_t *nsec_r0 = (uint32_t *)(&ctx->nsec.r0); 42 43 if (!sm_platform_handler(ctx)) 44 return false; 45 46 #ifdef CFG_PSCI_ARM32 47 if (OPTEE_SMC_OWNER_NUM(*nsec_r0) == OPTEE_SMC_OWNER_STANDARD) { 48 smc_std_handler((struct thread_smc_args *)nsec_r0, &ctx->nsec); 49 return false; /* Return to non secure state */ 50 } 51 #endif 52 53 sm_save_modes_regs(&ctx->nsec.mode_regs); 54 sm_restore_modes_regs(&ctx->sec.mode_regs); 55 56 memcpy(&ctx->sec.r0, nsec_r0, sizeof(uint32_t) * 8); 57 if (OPTEE_SMC_IS_FAST_CALL(ctx->sec.r0)) 58 ctx->sec.mon_lr = (uint32_t)&thread_vector_table.fast_smc_entry; 59 else 60 ctx->sec.mon_lr = (uint32_t)&thread_vector_table.std_smc_entry; 61 return true; /* return into secure state */ 62 } 63