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 /******************************************************************************* 22 * This function is responsible to: 23 * Load SCP_BL2U if platform has defined SCP_BL2U_BASE 24 * Perform platform setup. 25 * Go back to EL3. 26 ******************************************************************************/ 27 void bl2u_main(void) 28 { 29 NOTICE("BL2U: %s\n", version_string); 30 NOTICE("BL2U: %s\n", build_message); 31 32 #if SCP_BL2U_BASE 33 int rc; 34 /* Load the subsequent bootloader images */ 35 rc = bl2u_plat_handle_scp_bl2u(); 36 if (rc) { 37 ERROR("Failed to load SCP_BL2U (%i)\n", rc); 38 panic(); 39 } 40 #endif 41 42 /* Perform platform setup in BL2U after loading SCP_BL2U */ 43 bl2u_platform_setup(); 44 45 console_flush(); 46 47 #ifdef AARCH32 48 /* 49 * For AArch32 state BL1 and BL2U share the MMU setup. 50 * Given that BL2U does not map BL1 regions, MMU needs 51 * to be disabled in order to go back to BL1. 52 */ 53 disable_mmu_icache_secure(); 54 #endif /* AARCH32 */ 55 56 /* 57 * Indicate that BL2U is done and resume back to 58 * normal world via an SMC to BL1. 59 * x1 could be passed to Normal world, 60 * so DO NOT pass any secret information. 61 */ 62 smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0); 63 wfi(); 64 } 65