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/*
* Copyright (c) 2016-2017,2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <common/bl_common.h>
#include <common/desc_image_load.h>
#include <lib/fconf/fconf.h>
#include <lib/fconf/fconf_dyn_cfg_getter.h>
#include <plat/arm/common/plat_arm.h>
#if JUNO_AARCH32_EL3_RUNTIME
/*******************************************************************************
* This function changes the spsr for BL32 image to bypass
* the check in BL1 AArch64 exception handler. This is needed in the aarch32
* boot flow as the core comes up in aarch64 and to enter the BL32 image a warm
* reset in aarch32 state is required.
******************************************************************************/
int arm_bl2_plat_handle_post_image_load(unsigned int image_id)
{
int err = arm_bl2_handle_post_image_load(image_id);
if (!err && (image_id == BL32_IMAGE_ID)) {
bl_mem_params_node_t *bl_mem_params = get_bl_mem_params_node(image_id);
assert(bl_mem_params);
bl_mem_params->ep_info.spsr = SPSR_64(MODE_EL3, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
}
return err;
}
#else
/*******************************************************************************
* This function returns the list of executable images
******************************************************************************/
struct bl_params *plat_get_next_bl_params(void)
{
struct bl_params *arm_bl_params = arm_get_next_bl_params();
#if __aarch64__
const struct dyn_cfg_dtb_info_t *fw_config_info;
bl_mem_params_node_t *param_node;
uintptr_t fw_config_base = 0U;
entry_point_info_t *ep_info;
/* Get BL31 image node */
param_node = get_bl_mem_params_node(BL31_IMAGE_ID);
assert(param_node != NULL);
/* Get fw_config load address */
fw_config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, FW_CONFIG_ID);
assert(fw_config_info != NULL);
fw_config_base = fw_config_info->config_addr;
assert(fw_config_base != 0U);
/*
* Get the entry point info of BL31 image and override
* arg1 of entry point info with fw_config base address
*/
ep_info = ¶m_node->ep_info;
ep_info->args.arg1 = (uint32_t)fw_config_base;
#endif /* __aarch64__ */
return arm_bl_params;
}
#endif /* JUNO_AARCH32_EL3_RUNTIME */
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