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