| /* |
| * Copyright (c) 2013, 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 <stdio.h> |
| #include <string.h> |
| #include <assert.h> |
| #include <arch_helpers.h> |
| #include <console.h> |
| #include <platform.h> |
| #include <semihosting.h> |
| #include <bl_common.h> |
| #include <bl2.h> |
| |
| /******************************************************************************* |
| * 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 *bl2_tzram_layout; |
| meminfo *bl31_tzram_layout; |
| el_change_info *ns_image_info; |
| unsigned long bl31_base, el_status; |
| unsigned int bl2_load, bl31_load, mode; |
| |
| /* Perform remaining generic architectural setup in S-El1 */ |
| bl2_arch_setup(); |
| |
| /* Perform platform setup in BL1 */ |
| bl2_platform_setup(); |
| |
| #if defined (__GNUC__) |
| printf("BL2 Built : %s, %s\n\r", __TIME__, __DATE__); |
| #endif |
| |
| /* Find out how much free trusted ram remains after BL2 load */ |
| bl2_tzram_layout = bl2_plat_sec_mem_layout(); |
| |
| /* |
| * 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; |
| bl31_base = load_image(bl2_tzram_layout, BL31_IMAGE_NAME, |
| bl31_load, BL31_BASE); |
| |
| /* Assert if it has not been possible to load BL31 */ |
| assert(bl31_base != 0); |
| |
| /* |
| * Create a new layout of memory for BL31 as seen by BL2. This |
| * will gobble up all the BL2 memory. |
| */ |
| bl31_tzram_layout = (meminfo *) get_el_change_mem_ptr(); |
| init_bl31_mem_layout(bl2_tzram_layout, bl31_tzram_layout, bl31_load); |
| |
| /* |
| * BL2 also needs to tell BL31 where the non-trusted software image |
| * has been loaded. Place this info right after the BL31 memory layout |
| */ |
| ns_image_info = (el_change_info *) ((unsigned char *) bl31_tzram_layout |
| + sizeof(meminfo)); |
| |
| /* |
| * Assume that the non-secure bootloader has already been |
| * loaded to its platform-specific location. |
| */ |
| ns_image_info->entrypoint = plat_get_ns_image_entrypoint(); |
| |
| /* Figure out what mode we enter the non-secure world in */ |
| el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT; |
| el_status &= ID_AA64PFR0_ELX_MASK; |
| |
| if (el_status) |
| mode = MODE_EL2; |
| else |
| mode = MODE_EL1; |
| |
| ns_image_info->spsr = make_spsr(mode, MODE_SP_ELX, MODE_RW_64); |
| ns_image_info->security_state = NON_SECURE; |
| flush_dcache_range((unsigned long) ns_image_info, |
| sizeof(el_change_info)); |
| |
| /* |
| * Run BL31 via an SMC to BL1. Information on how to pass control to |
| * the non-trusted software image will be passed to BL31 in x2. |
| */ |
| if (bl31_base) |
| run_image(bl31_base, |
| make_spsr(MODE_EL3, MODE_SP_ELX, MODE_RW_64), |
| SECURE, |
| bl31_tzram_layout, |
| (void *) ns_image_info); |
| |
| /* There is no valid reason for run_image() to return */ |
| assert(0); |
| } |
| |
| /******************************************************************************* |
| * BL1 has this function to print the fact that BL2 has done its job and BL31 is |
| * about to be loaded. Since BL2 re-uses BL1's exception table, it needs to |
| * define this function as well. |
| * TODO: Remove this function from BL2. |
| ******************************************************************************/ |
| void display_boot_progress(unsigned long entrypoint, |
| unsigned long spsr, |
| unsigned long mem_layout, |
| unsigned long ns_image_info) |
| { |
| return; |
| } |