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