1 /* 2 * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <arch_helpers.h> 32 #include <auth_mod.h> 33 #include <bl1.h> 34 #include <bl_common.h> 35 #include <console.h> 36 #include <debug.h> 37 #include <platform.h> 38 #include "bl2_private.h" 39 40 41 /******************************************************************************* 42 * The only thing to do in BL2 is to load further images and pass control to 43 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2 44 * runs entirely in S-EL1. 45 ******************************************************************************/ 46 void bl2_main(void) 47 { 48 entry_point_info_t *next_bl_ep_info; 49 50 NOTICE("BL2: %s\n", version_string); 51 NOTICE("BL2: %s\n", build_message); 52 53 /* Perform remaining generic architectural setup in S-EL1 */ 54 bl2_arch_setup(); 55 56 #if TRUSTED_BOARD_BOOT 57 /* Initialize authentication module */ 58 auth_mod_init(); 59 #endif /* TRUSTED_BOARD_BOOT */ 60 61 /* Load the subsequent bootloader images. */ 62 next_bl_ep_info = bl2_load_images(); 63 64 #ifdef AARCH32 65 /* 66 * For AArch32 state BL1 and BL2 share the MMU setup. 67 * Given that BL2 does not map BL1 regions, MMU needs 68 * to be disabled in order to go back to BL1. 69 */ 70 disable_mmu_icache_secure(); 71 #endif /* AARCH32 */ 72 73 console_flush(); 74 75 /* 76 * Run next BL image via an SMC to BL1. Information on how to pass 77 * control to the BL32 (if present) and BL33 software images will 78 * be passed to next BL image as an argument. 79 */ 80 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0); 81 } 82