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/*
* 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 <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <auth_mod.h>
#include <bl_common.h>
#include <debug.h>
#include <errno.h>
#include <platform.h>
#include <platform_def.h>
#include <stdint.h>
#include "bl2_private.h"
/*******************************************************************************
* Load the BL3-0 image if there's one.
* If a platform does not want to attempt to load BL3-0 image it must leave
* BL30_BASE undefined.
* Return 0 on success or if there's no BL3-0 image to load, a negative error
* code otherwise.
******************************************************************************/
static int load_bl30(void)
{
int e = 0;
#ifdef BL30_BASE
meminfo_t bl30_mem_info;
image_info_t bl30_image_info;
/*
* It is up to the platform to specify where BL3-0 should be loaded if
* it exists. It could create space in the secure sram or point to a
* completely different memory.
*
* The entry point information is not relevant in this case as the AP
* won't execute the BL3-0 image.
*/
INFO("BL2: Loading BL3-0\n");
bl2_plat_get_bl30_meminfo(&bl30_mem_info);
bl30_image_info.h.version = VERSION_1;
e = load_auth_image(&bl30_mem_info,
BL30_IMAGE_ID,
BL30_BASE,
&bl30_image_info,
NULL);
if (e == 0) {
/* The subsequent handling of BL3-0 is platform specific */
e = bl2_plat_handle_bl30(&bl30_image_info);
if (e) {
ERROR("Failure in platform-specific handling of BL3-0 image.\n");
}
}
#endif /* BL30_BASE */
return e;
}
#ifndef EL3_PAYLOAD_BASE
/*******************************************************************************
* Load the BL3-1 image.
* The bl2_to_bl31_params and bl31_ep_info params will be updated with the
* relevant BL3-1 information.
* Return 0 on success, a negative error code otherwise.
******************************************************************************/
static int load_bl31(bl31_params_t *bl2_to_bl31_params,
entry_point_info_t *bl31_ep_info)
{
meminfo_t *bl2_tzram_layout;
int e;
INFO("BL2: Loading BL3-1\n");
assert(bl2_to_bl31_params != NULL);
assert(bl31_ep_info != NULL);
/* Find out how much free trusted ram remains after BL2 load */
bl2_tzram_layout = bl2_plat_sec_mem_layout();
/* Set the X0 parameter to BL3-1 */
bl31_ep_info->args.arg0 = (unsigned long)bl2_to_bl31_params;
/* Load the BL3-1 image */
e = load_auth_image(bl2_tzram_layout,
BL31_IMAGE_ID,
BL31_BASE,
bl2_to_bl31_params->bl31_image_info,
bl31_ep_info);
if (e == 0) {
bl2_plat_set_bl31_ep_info(bl2_to_bl31_params->bl31_image_info,
bl31_ep_info);
}
return e;
}
/*******************************************************************************
* Load the BL3-2 image if there's one.
* The bl2_to_bl31_params param will be updated with the relevant BL3-2
* information.
* If a platform does not want to attempt to load BL3-2 image it must leave
* BL32_BASE undefined.
* Return 0 on success or if there's no BL3-2 image to load, a negative error
* code otherwise.
******************************************************************************/
static int load_bl32(bl31_params_t *bl2_to_bl31_params)
{
int e = 0;
#ifdef BL32_BASE
meminfo_t bl32_mem_info;
INFO("BL2: Loading BL3-2\n");
assert(bl2_to_bl31_params != NULL);
/*
* It is up to the platform to specify where BL3-2 should be loaded if
* it exists. It could create space in the secure sram or point to a
* completely different memory.
*/
bl2_plat_get_bl32_meminfo(&bl32_mem_info);
e = load_auth_image(&bl32_mem_info,
BL32_IMAGE_ID,
BL32_BASE,
bl2_to_bl31_params->bl32_image_info,
bl2_to_bl31_params->bl32_ep_info);
if (e == 0) {
bl2_plat_set_bl32_ep_info(
bl2_to_bl31_params->bl32_image_info,
bl2_to_bl31_params->bl32_ep_info);
}
#endif /* BL32_BASE */
return e;
}
/*******************************************************************************
* Load the BL3-3 image.
* The bl2_to_bl31_params param will be updated with the relevant BL3-3
* information.
* Return 0 on success, a negative error code otherwise.
******************************************************************************/
static int load_bl33(bl31_params_t *bl2_to_bl31_params)
{
meminfo_t bl33_mem_info;
int e;
INFO("BL2: Loading BL3-3\n");
assert(bl2_to_bl31_params != NULL);
bl2_plat_get_bl33_meminfo(&bl33_mem_info);
/* Load the BL3-3 image in non-secure memory provided by the platform */
e = load_auth_image(&bl33_mem_info,
BL33_IMAGE_ID,
plat_get_ns_image_entrypoint(),
bl2_to_bl31_params->bl33_image_info,
bl2_to_bl31_params->bl33_ep_info);
if (e == 0) {
bl2_plat_set_bl33_ep_info(bl2_to_bl31_params->bl33_image_info,
bl2_to_bl31_params->bl33_ep_info);
}
return e;
}
#endif /* EL3_PAYLOAD_BASE */
/*******************************************************************************
* The only thing to do in BL2 is to load further images and pass control to
* BL3-1. The memory occupied by BL2 will be reclaimed by BL3-x stages. BL2 runs
* entirely in S-EL1.
******************************************************************************/
void bl2_main(void)
{
bl31_params_t *bl2_to_bl31_params;
entry_point_info_t *bl31_ep_info;
int e;
NOTICE("BL2: %s\n", version_string);
NOTICE("BL2: %s\n", build_message);
/* Perform remaining generic architectural setup in S-EL1 */
bl2_arch_setup();
#if TRUSTED_BOARD_BOOT
/* Initialize authentication module */
auth_mod_init();
#endif /* TRUSTED_BOARD_BOOT */
/*
* Load the subsequent bootloader images
*/
e = load_bl30();
if (e) {
ERROR("Failed to load BL3-0 (%i)\n", e);
plat_error_handler(e);
}
/* Perform platform setup in BL2 after loading BL3-0 */
bl2_platform_setup();
/*
* Get a pointer to the memory the platform has set aside to pass
* information to BL3-1.
*/
bl2_to_bl31_params = bl2_plat_get_bl31_params();
bl31_ep_info = bl2_plat_get_bl31_ep_info();
#ifdef EL3_PAYLOAD_BASE
/*
* In the case of an EL3 payload, we don't need to load any further
* images. Just update the BL31 entrypoint info structure to make BL1
* jump to the EL3 payload.
* The pointer to the memory the platform has set aside to pass
* information to BL3-1 in the normal boot flow is reused here, even
* though only a fraction of the information contained in the
* bl31_params_t structure makes sense in the context of EL3 payloads.
* This will be refined in the future.
*/
VERBOSE("BL2: Populating the entrypoint info for the EL3 payload\n");
bl31_ep_info->pc = EL3_PAYLOAD_BASE;
bl31_ep_info->args.arg0 = (unsigned long) bl2_to_bl31_params;
bl2_plat_set_bl31_ep_info(NULL, bl31_ep_info);
#else
e = load_bl31(bl2_to_bl31_params, bl31_ep_info);
if (e) {
ERROR("Failed to load BL3-1 (%i)\n", e);
plat_error_handler(e);
}
e = load_bl32(bl2_to_bl31_params);
if (e) {
if (e == -EAUTH) {
ERROR("Failed to authenticate BL3-2\n");
plat_error_handler(e);
} else {
WARN("Failed to load BL3-2 (%i)\n", e);
}
}
e = load_bl33(bl2_to_bl31_params);
if (e) {
ERROR("Failed to load BL3-3 (%i)\n", e);
plat_error_handler(e);
}
#endif /* EL3_PAYLOAD_BASE */
/* Flush the params to be passed to memory */
bl2_plat_flush_bl31_params();
/*
* Run BL3-1 via an SMC to BL1. Information on how to pass control to
* the BL3-2 (if present) and BL3-3 software images will be passed to
* BL3-1 as an argument.
*/
smc(RUN_IMAGE, (unsigned long)bl31_ep_info, 0, 0, 0, 0, 0, 0);
}