1 /* 2 * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch.h> 8 #include <arch_helpers.h> 9 #include <assert.h> 10 #include <auth_mod.h> 11 #include <bl1.h> 12 #include <bl2u.h> 13 #include <bl_common.h> 14 #include <console.h> 15 #include <debug.h> 16 #include <platform.h> 17 #include <platform_def.h> 18 #include <stdint.h> 19 20 /******************************************************************************* 21 * This function is responsible to: 22 * Load SCP_BL2U if platform has defined SCP_BL2U_BASE 23 * Perform platform setup. 24 * Go back to EL3. 25 ******************************************************************************/ 26 void bl2u_main(void) 27 { 28 NOTICE("BL2U: %s\n", version_string); 29 NOTICE("BL2U: %s\n", build_message); 30 31 #if SCP_BL2U_BASE 32 int rc; 33 /* Load the subsequent bootloader images */ 34 rc = bl2u_plat_handle_scp_bl2u(); 35 if (rc) { 36 ERROR("Failed to load SCP_BL2U (%i)\n", rc); 37 panic(); 38 } 39 #endif 40 41 /* Perform platform setup in BL2U after loading SCP_BL2U */ 42 bl2u_platform_setup(); 43 44 console_flush(); 45 46 #ifdef AARCH32 47 /* 48 * For AArch32 state BL1 and BL2U share the MMU setup. 49 * Given that BL2U does not map BL1 regions, MMU needs 50 * to be disabled in order to go back to BL1. 51 */ 52 disable_mmu_icache_secure(); 53 #endif /* AARCH32 */ 54 55 /* 56 * Indicate that BL2U is done and resume back to 57 * normal world via an SMC to BL1. 58 * x1 could be passed to Normal world, 59 * so DO NOT pass any secret information. 60 */ 61 smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0); 62 wfi(); 63 } 64