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 #ifdef AARCH32 17 #define NEXT_IMAGE "BL32" 18 #else 19 #define NEXT_IMAGE "BL31" 20 #endif 21 22 /******************************************************************************* 23 * The only thing to do in BL2 is to load further images and pass control to 24 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2 25 * runs entirely in S-EL1. 26 ******************************************************************************/ 27 void bl2_main(void) 28 { 29 entry_point_info_t *next_bl_ep_info; 30 31 NOTICE("BL2: %s\n", version_string); 32 NOTICE("BL2: %s\n", build_message); 33 34 /* Perform remaining generic architectural setup in S-EL1 */ 35 bl2_arch_setup(); 36 37 #if TRUSTED_BOARD_BOOT 38 /* Initialize authentication module */ 39 auth_mod_init(); 40 #endif /* TRUSTED_BOARD_BOOT */ 41 42 /* initialize boot source */ 43 bl2_plat_preload_setup(); 44 45 /* Load the subsequent bootloader images. */ 46 next_bl_ep_info = bl2_load_images(); 47 48 #ifdef AARCH32 49 /* 50 * For AArch32 state BL1 and BL2 share the MMU setup. 51 * Given that BL2 does not map BL1 regions, MMU needs 52 * to be disabled in order to go back to BL1. 53 */ 54 disable_mmu_icache_secure(); 55 #endif /* AARCH32 */ 56 57 58 #if !BL2_AT_EL3 59 console_flush(); 60 61 /* 62 * Run next BL image via an SMC to BL1. Information on how to pass 63 * control to the BL32 (if present) and BL33 software images will 64 * be passed to next BL image as an argument. 65 */ 66 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0); 67 #else 68 NOTICE("BL2: Booting " NEXT_IMAGE "\n"); 69 print_entry_point_info(next_bl_ep_info); 70 console_flush(); 71 72 bl2_run_next_image(next_bl_ep_info); 73 #endif 74 } 75