1 /* 2 * Copyright (c) 2015-2017, 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 <bl_common.h> 13 #include <console.h> 14 #include <debug.h> 15 #include <platform.h> 16 #include <platform_def.h> 17 #include <stdint.h> 18 19 /******************************************************************************* 20 * This function is responsible to: 21 * Load SCP_BL2U if platform has defined SCP_BL2U_BASE 22 * Perform platform setup. 23 * Go back to EL3. 24 ******************************************************************************/ 25 void bl2u_main(void) 26 { 27 NOTICE("BL2U: %s\n", version_string); 28 NOTICE("BL2U: %s\n", build_message); 29 30 #if SCP_BL2U_BASE 31 int rc; 32 /* Load the subsequent bootloader images */ 33 rc = bl2u_plat_handle_scp_bl2u(); 34 if (rc) { 35 ERROR("Failed to load SCP_BL2U (%i)\n", rc); 36 panic(); 37 } 38 #endif 39 40 /* Perform platform setup in BL2U after loading SCP_BL2U */ 41 bl2u_platform_setup(); 42 43 console_flush(); 44 45 #ifdef AARCH32 46 /* 47 * For AArch32 state BL1 and BL2U share the MMU setup. 48 * Given that BL2U does not map BL1 regions, MMU needs 49 * to be disabled in order to go back to BL1. 50 */ 51 disable_mmu_icache_secure(); 52 #endif /* AARCH32 */ 53 54 /* 55 * Indicate that BL2U is done and resume back to 56 * normal world via an SMC to BL1. 57 * x1 could be passed to Normal world, 58 * so DO NOT pass any secret information. 59 */ 60 smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0); 61 wfi(); 62 } 63
