1 /* 2 * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch_helpers.h> 8 #include <auth_mod.h> 9 #include <bl1.h> 10 #include <bl_common.h> 11 #include <console.h> 12 #include <debug.h> 13 #include <platform.h> 14 #include "bl2_private.h" 15 16 17 /******************************************************************************* 18 * The only thing to do in BL2 is to load further images and pass control to 19 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2 20 * runs entirely in S-EL1. 21 ******************************************************************************/ 22 void bl2_main(void) 23 { 24 entry_point_info_t *next_bl_ep_info; 25 26 NOTICE("BL2: %s\n", version_string); 27 NOTICE("BL2: %s\n", build_message); 28 29 /* Perform remaining generic architectural setup in S-EL1 */ 30 bl2_arch_setup(); 31 32 #if TRUSTED_BOARD_BOOT 33 /* Initialize authentication module */ 34 auth_mod_init(); 35 #endif /* TRUSTED_BOARD_BOOT */ 36 37 /* initialize boot source */ 38 bl2_plat_preload_setup(); 39 40 /* Load the subsequent bootloader images. */ 41 next_bl_ep_info = bl2_load_images(); 42 43 #ifdef AARCH32 44 /* 45 * For AArch32 state BL1 and BL2 share the MMU setup. 46 * Given that BL2 does not map BL1 regions, MMU needs 47 * to be disabled in order to go back to BL1. 48 */ 49 disable_mmu_icache_secure(); 50 #endif /* AARCH32 */ 51 52 console_flush(); 53 54 /* 55 * Run next BL image via an SMC to BL1. Information on how to pass 56 * control to the BL32 (if present) and BL33 software images will 57 * be passed to next BL image as an argument. 58 */ 59 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0); 60 } 61
