1 /* 2 * Copyright (c) 2013-2018, 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 <bl2.h> 11 #include <bl_common.h> 12 #include <console.h> 13 #include <debug.h> 14 #include <platform.h> 15 #include "bl2_private.h" 16 17 #ifdef AARCH32 18 #define NEXT_IMAGE "BL32" 19 #else 20 #define NEXT_IMAGE "BL31" 21 #endif 22 23 /******************************************************************************* 24 * The only thing to do in BL2 is to load further images and pass control to 25 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2 26 * runs entirely in S-EL1. 27 ******************************************************************************/ 28 void bl2_main(void) 29 { 30 entry_point_info_t *next_bl_ep_info; 31 32 NOTICE("BL2: %s\n", version_string); 33 NOTICE("BL2: %s\n", build_message); 34 35 /* Perform remaining generic architectural setup in S-EL1 */ 36 bl2_arch_setup(); 37 38 #if TRUSTED_BOARD_BOOT 39 /* Initialize authentication module */ 40 auth_mod_init(); 41 #endif /* TRUSTED_BOARD_BOOT */ 42 43 /* initialize boot source */ 44 bl2_plat_preload_setup(); 45 46 /* Load the subsequent bootloader images. */ 47 next_bl_ep_info = bl2_load_images(); 48 49 #ifdef AARCH32 50 /* 51 * For AArch32 state BL1 and BL2 share the MMU setup. 52 * Given that BL2 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 /* AARCH32 */ 57 58 59 #if !BL2_AT_EL3 60 console_flush(); 61 62 /* 63 * Run next BL image via an SMC to BL1. Information on how to pass 64 * control to the BL32 (if present) and BL33 software images will 65 * be passed to next BL image as an argument. 66 */ 67 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0); 68 #else 69 NOTICE("BL2: Booting " NEXT_IMAGE "\n"); 70 print_entry_point_info(next_bl_ep_info); 71 console_flush(); 72 73 bl2_run_next_image(next_bl_ep_info); 74 #endif 75 } 76