1 /* 2 * Copyright (c) 2015-2024, 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/build_message.h> 18 #include <common/debug.h> 19 #include <drivers/auth/auth_mod.h> 20 #include <drivers/console.h> 21 #include <plat/common/platform.h> 22 23 /******************************************************************************* 24 * This function is responsible to: 25 * Load SCP_BL2U if platform has defined SCP_BL2U_BASE 26 * Perform platform setup. 27 * Go back to EL3. 28 ******************************************************************************/ 29 void bl2u_main(void) 30 { 31 NOTICE("BL2U: %s\n", build_version_string); 32 NOTICE("BL2U: %s\n", build_message); 33 34 #if SCP_BL2U_BASE 35 int rc; 36 /* Load the subsequent bootloader images */ 37 rc = bl2u_plat_handle_scp_bl2u(); 38 if (rc != 0) { 39 ERROR("Failed to load SCP_BL2U (%i)\n", rc); 40 panic(); 41 } 42 #endif 43 44 /* Perform platform setup in BL2U after loading SCP_BL2U */ 45 bl2u_platform_setup(); 46 47 console_flush(); 48 49 #ifndef __aarch64__ 50 /* 51 * For AArch32 state BL1 and BL2U share the MMU setup. 52 * Given that BL2U does not map BL1 regions, MMU needs 53 * to be disabled in order to go back to BL1. 54 */ 55 disable_mmu_icache_secure(); 56 #endif /* !__aarch64__ */ 57 58 /* 59 * Indicate that BL2U is done and resume back to 60 * normal world via an SMC to BL1. 61 * x1 could be passed to Normal world, 62 * so DO NOT pass any secret information. 63 */ 64 smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0); 65 wfi(); 66 } 67