286 lines
8.9 KiB
C
286 lines
8.9 KiB
C
/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <arch.h>
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#include <arch_helpers.h>
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#include <assert.h>
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#include <auth_mod.h>
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#include <bl_common.h>
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#include <debug.h>
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#include <errno.h>
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#include <platform.h>
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#include <platform_def.h>
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#include <stdint.h>
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#include "bl2_private.h"
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/*******************************************************************************
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* Load the BL3-0 image if there's one.
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* If a platform does not want to attempt to load BL3-0 image it must leave
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* BL30_BASE undefined.
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* Return 0 on success or if there's no BL3-0 image to load, a negative error
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* code otherwise.
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******************************************************************************/
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static int load_bl30(void)
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{
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int e = 0;
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#ifdef BL30_BASE
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meminfo_t bl30_mem_info;
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image_info_t bl30_image_info;
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/*
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* It is up to the platform to specify where BL3-0 should be loaded if
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* it exists. It could create space in the secure sram or point to a
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* completely different memory.
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*
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* The entry point information is not relevant in this case as the AP
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* won't execute the BL3-0 image.
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*/
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INFO("BL2: Loading BL3-0\n");
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bl2_plat_get_bl30_meminfo(&bl30_mem_info);
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bl30_image_info.h.version = VERSION_1;
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e = load_auth_image(&bl30_mem_info,
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BL30_IMAGE_ID,
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BL30_BASE,
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&bl30_image_info,
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NULL);
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if (e == 0) {
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/* The subsequent handling of BL3-0 is platform specific */
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e = bl2_plat_handle_bl30(&bl30_image_info);
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if (e) {
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ERROR("Failure in platform-specific handling of BL3-0 image.\n");
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}
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}
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#endif /* BL30_BASE */
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return e;
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}
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#ifndef EL3_PAYLOAD_BASE
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/*******************************************************************************
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* Load the BL3-1 image.
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* The bl2_to_bl31_params and bl31_ep_info params will be updated with the
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* relevant BL3-1 information.
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* Return 0 on success, a negative error code otherwise.
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******************************************************************************/
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static int load_bl31(bl31_params_t *bl2_to_bl31_params,
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entry_point_info_t *bl31_ep_info)
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{
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meminfo_t *bl2_tzram_layout;
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int e;
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INFO("BL2: Loading BL3-1\n");
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assert(bl2_to_bl31_params != NULL);
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assert(bl31_ep_info != NULL);
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/* Find out how much free trusted ram remains after BL2 load */
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bl2_tzram_layout = bl2_plat_sec_mem_layout();
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/* Set the X0 parameter to BL3-1 */
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bl31_ep_info->args.arg0 = (unsigned long)bl2_to_bl31_params;
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/* Load the BL3-1 image */
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e = load_auth_image(bl2_tzram_layout,
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BL31_IMAGE_ID,
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BL31_BASE,
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bl2_to_bl31_params->bl31_image_info,
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bl31_ep_info);
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if (e == 0) {
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bl2_plat_set_bl31_ep_info(bl2_to_bl31_params->bl31_image_info,
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bl31_ep_info);
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}
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return e;
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}
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/*******************************************************************************
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* Load the BL3-2 image if there's one.
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* The bl2_to_bl31_params param will be updated with the relevant BL3-2
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* information.
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* If a platform does not want to attempt to load BL3-2 image it must leave
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* BL32_BASE undefined.
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* Return 0 on success or if there's no BL3-2 image to load, a negative error
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* code otherwise.
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******************************************************************************/
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static int load_bl32(bl31_params_t *bl2_to_bl31_params)
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{
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int e = 0;
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#ifdef BL32_BASE
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meminfo_t bl32_mem_info;
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INFO("BL2: Loading BL3-2\n");
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assert(bl2_to_bl31_params != NULL);
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/*
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* It is up to the platform to specify where BL3-2 should be loaded if
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* it exists. It could create space in the secure sram or point to a
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* completely different memory.
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*/
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bl2_plat_get_bl32_meminfo(&bl32_mem_info);
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e = load_auth_image(&bl32_mem_info,
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BL32_IMAGE_ID,
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BL32_BASE,
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bl2_to_bl31_params->bl32_image_info,
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bl2_to_bl31_params->bl32_ep_info);
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if (e == 0) {
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bl2_plat_set_bl32_ep_info(
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bl2_to_bl31_params->bl32_image_info,
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bl2_to_bl31_params->bl32_ep_info);
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}
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#endif /* BL32_BASE */
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return e;
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}
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/*******************************************************************************
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* Load the BL3-3 image.
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* The bl2_to_bl31_params param will be updated with the relevant BL3-3
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* information.
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* Return 0 on success, a negative error code otherwise.
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******************************************************************************/
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static int load_bl33(bl31_params_t *bl2_to_bl31_params)
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{
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meminfo_t bl33_mem_info;
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int e;
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INFO("BL2: Loading BL3-3\n");
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assert(bl2_to_bl31_params != NULL);
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bl2_plat_get_bl33_meminfo(&bl33_mem_info);
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/* Load the BL3-3 image in non-secure memory provided by the platform */
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e = load_auth_image(&bl33_mem_info,
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BL33_IMAGE_ID,
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plat_get_ns_image_entrypoint(),
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bl2_to_bl31_params->bl33_image_info,
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bl2_to_bl31_params->bl33_ep_info);
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if (e == 0) {
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bl2_plat_set_bl33_ep_info(bl2_to_bl31_params->bl33_image_info,
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bl2_to_bl31_params->bl33_ep_info);
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}
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return e;
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}
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#endif /* EL3_PAYLOAD_BASE */
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/*******************************************************************************
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* The only thing to do in BL2 is to load further images and pass control to
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* BL3-1. The memory occupied by BL2 will be reclaimed by BL3-x stages. BL2 runs
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* entirely in S-EL1.
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******************************************************************************/
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void bl2_main(void)
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{
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bl31_params_t *bl2_to_bl31_params;
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entry_point_info_t *bl31_ep_info;
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int e;
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NOTICE("BL2: %s\n", version_string);
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NOTICE("BL2: %s\n", build_message);
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/* Perform remaining generic architectural setup in S-EL1 */
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bl2_arch_setup();
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#if TRUSTED_BOARD_BOOT
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/* Initialize authentication module */
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auth_mod_init();
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#endif /* TRUSTED_BOARD_BOOT */
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/*
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* Load the subsequent bootloader images
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*/
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e = load_bl30();
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if (e) {
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ERROR("Failed to load BL3-0 (%i)\n", e);
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plat_error_handler(e);
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}
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/* Perform platform setup in BL2 after loading BL3-0 */
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bl2_platform_setup();
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/*
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* Get a pointer to the memory the platform has set aside to pass
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* information to BL3-1.
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*/
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bl2_to_bl31_params = bl2_plat_get_bl31_params();
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bl31_ep_info = bl2_plat_get_bl31_ep_info();
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#ifdef EL3_PAYLOAD_BASE
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/*
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* In the case of an EL3 payload, we don't need to load any further
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* images. Just update the BL31 entrypoint info structure to make BL1
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* jump to the EL3 payload.
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* The pointer to the memory the platform has set aside to pass
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* information to BL3-1 in the normal boot flow is reused here, even
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* though only a fraction of the information contained in the
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* bl31_params_t structure makes sense in the context of EL3 payloads.
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* This will be refined in the future.
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*/
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VERBOSE("BL2: Populating the entrypoint info for the EL3 payload\n");
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bl31_ep_info->pc = EL3_PAYLOAD_BASE;
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bl31_ep_info->args.arg0 = (unsigned long) bl2_to_bl31_params;
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bl2_plat_set_bl31_ep_info(NULL, bl31_ep_info);
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#else
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e = load_bl31(bl2_to_bl31_params, bl31_ep_info);
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if (e) {
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ERROR("Failed to load BL3-1 (%i)\n", e);
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plat_error_handler(e);
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}
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e = load_bl32(bl2_to_bl31_params);
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if (e) {
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if (e == -EAUTH) {
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ERROR("Failed to authenticate BL3-2\n");
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plat_error_handler(e);
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} else {
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WARN("Failed to load BL3-2 (%i)\n", e);
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}
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}
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e = load_bl33(bl2_to_bl31_params);
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if (e) {
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ERROR("Failed to load BL3-3 (%i)\n", e);
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plat_error_handler(e);
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}
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#endif /* EL3_PAYLOAD_BASE */
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/* Flush the params to be passed to memory */
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bl2_plat_flush_bl31_params();
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/*
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* Run BL3-1 via an SMC to BL1. Information on how to pass control to
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* the BL3-2 (if present) and BL3-3 software images will be passed to
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* BL3-1 as an argument.
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*/
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smc(RUN_IMAGE, (unsigned long)bl31_ep_info, 0, 0, 0, 0, 0, 0);
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}
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