/* * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of ARM nor the names of its contributors may be used * to endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include "bl2_private.h" /******************************************************************************* * Runs BL31 from the given entry point. It jumps to a higher exception level * through an SMC. ******************************************************************************/ static void __dead2 bl2_run_bl31(entry_point_info_t *bl31_ep_info, unsigned long arg1, unsigned long arg2) { /* Set the args pointer */ bl31_ep_info->args.arg0 = arg1; bl31_ep_info->args.arg1 = arg2; /* Flush the params to be passed to memory */ bl2_plat_flush_bl31_params(); smc(RUN_IMAGE, (unsigned long)bl31_ep_info, 0, 0, 0, 0, 0, 0); } /******************************************************************************* * The only thing to do in BL2 is to load further images and pass control to * BL31. The memory occupied by BL2 will be reclaimed by BL3_x stages. BL2 runs * entirely in S-EL1. Since arm standard c libraries are not PIC, printf et al * are not available. We rely on assertions to signal error conditions ******************************************************************************/ void bl2_main(void) { meminfo_t *bl2_tzram_layout; bl31_params_t *bl2_to_bl31_params; bl31_plat_params_t *bl2_to_bl31_plat_params; unsigned int bl2_load, bl31_load; entry_point_info_t *bl31_ep_info; int e; /* Perform remaining generic architectural setup in S-El1 */ bl2_arch_setup(); /* Perform platform setup in BL1 */ bl2_platform_setup(); printf("BL2 %s\n\r", build_message); /* Find out how much free trusted ram remains after BL2 load */ bl2_tzram_layout = bl2_plat_sec_mem_layout(); /* * Get a pointer to the memory the platform has set aside to pass * information to BL31. */ bl2_to_bl31_params = bl2_plat_get_bl31_params(); bl2_to_bl31_plat_params = bl2_plat_get_bl31_plat_params(); bl31_ep_info = bl2_plat_get_bl31_ep_info(); /* * Load BL31. BL1 tells BL2 whether it has been TOP or BOTTOM loaded. * To avoid fragmentation of trusted SRAM memory, BL31 is always * loaded opposite to BL2. This allows BL31 to reclaim BL2 memory * while maintaining its free space in one contiguous chunk. */ bl2_load = bl2_tzram_layout->attr & LOAD_MASK; assert((bl2_load == TOP_LOAD) || (bl2_load == BOT_LOAD)); bl31_load = (bl2_load == TOP_LOAD) ? BOT_LOAD : TOP_LOAD; e = load_image(bl2_tzram_layout, BL31_IMAGE_NAME, bl31_load, BL31_BASE, bl2_to_bl31_params->bl31_image_info, bl31_ep_info); /* Assert if it has not been possible to load BL31 */ if (e) { ERROR("Failed to load BL3-1.\n"); panic(); } bl2_plat_set_bl31_ep_info(bl2_to_bl31_params->bl31_image_info, bl31_ep_info); /* * Create a new layout of memory for BL31 as seen by BL2. This * will gobble up all the BL2 memory. */ init_bl31_mem_layout(bl2_tzram_layout, &bl2_to_bl31_plat_params->bl31_meminfo, bl31_load); /* Load the BL33 image in non-secure memory provided by the platform */ e = load_image(&bl2_to_bl31_plat_params->bl33_meminfo, BL33_IMAGE_NAME, BOT_LOAD, plat_get_ns_image_entrypoint(), bl2_to_bl31_params->bl33_image_info, bl2_to_bl31_params->bl33_ep_info); /* Halt if failed to load normal world firmware. */ if (e) { ERROR("Failed to load BL3-3.\n"); panic(); } bl2_plat_set_bl33_ep_info(bl2_to_bl31_params->bl33_image_info, bl2_to_bl31_params->bl33_ep_info); /* * Load the BL32 image if there's one. It is upto to platform * to specify where BL32 should be loaded if it exists. It * could create space in the secure sram or point to a * completely different memory. A zero size indicates that the * platform does not want to load a BL32 image. */ if (bl2_to_bl31_plat_params->bl32_meminfo.total_size) { e = load_image(&bl2_to_bl31_plat_params->bl32_meminfo, BL32_IMAGE_NAME, bl2_to_bl31_plat_params->bl32_meminfo.attr & LOAD_MASK, BL32_BASE, bl2_to_bl31_params->bl32_image_info, bl2_to_bl31_params->bl32_ep_info); /* Halt if failed to load normal world firmware. */ if (e) { WARN("Failed to load BL3-2.\n"); } else { bl2_plat_set_bl32_ep_info( bl2_to_bl31_params->bl32_image_info, bl2_to_bl31_params->bl32_ep_info); } } /* * Run BL31 via an SMC to BL1. Information on how to pass control to * the BL32 (if present) and BL33 software images will be passed to * BL31 as an argument. */ bl2_run_bl31(bl31_ep_info, (unsigned long)bl2_to_bl31_params, (unsigned long)bl2_to_bl31_plat_params); }