1 /* 2 * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <stdint.h> 9 10 #include <platform_def.h> 11 12 #include <arch.h> 13 #include <arch_helpers.h> 14 #include <bl1/bl1.h> 15 #include <bl2u/bl2u.h> 16 #include <common/bl_common.h> 17 #include <common/debug.h> 18 #include <drivers/auth/auth_mod.h> 19 #include <drivers/console.h> 20 #include <plat/common/platform.h> 21 22 /******************************************************************************* 23 * This function is responsible to: 24 * Load SCP_BL2U if platform has defined SCP_BL2U_BASE 25 * Perform platform setup. 26 * Go back to EL3. 27 ******************************************************************************/ 28 void bl2u_main(void) 29 { 30 NOTICE("BL2U: %s\n", version_string); 31 NOTICE("BL2U: %s\n", build_message); 32 33 #if SCP_BL2U_BASE 34 int rc; 35 /* Load the subsequent bootloader images */ 36 rc = bl2u_plat_handle_scp_bl2u(); 37 if (rc != 0) { 38 ERROR("Failed to load SCP_BL2U (%i)\n", rc); 39 panic(); 40 } 41 #endif 42 43 /* Perform platform setup in BL2U after loading SCP_BL2U */ 44 bl2u_platform_setup(); 45 46 console_flush(); 47 48 #ifndef __aarch64__ 49 /* 50 * For AArch32 state BL1 and BL2U share the MMU setup. 51 * Given that BL2U does not map BL1 regions, MMU needs 52 * to be disabled in order to go back to BL1. 53 */ 54 disable_mmu_icache_secure(); 55 #endif /* !__aarch64__ */ 56 57 /* 58 * Indicate that BL2U is done and resume back to 59 * normal world via an SMC to BL1. 60 * x1 could be passed to Normal world, 61 * so DO NOT pass any secret information. 62 */ 63 smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0); 64 wfi(); 65 } 66