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118 lines
2.8 KiB
118 lines
2.8 KiB
/*
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* Copyright (c) 2015-2018, 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 <errno.h>
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#include <platform_def.h>
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#include <arch_helpers.h>
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#include <bl1/bl1.h>
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#include <common/bl_common.h>
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#include <common/debug.h>
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#include <plat/common/platform.h>
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/*
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* The following platform functions are weakly defined. They
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* are default implementations that allow BL1 to compile in
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* absence of real definitions. The Platforms may override
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* with more complex definitions.
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*/
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#pragma weak bl1_plat_get_next_image_id
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#pragma weak bl1_plat_set_ep_info
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#pragma weak bl1_plat_get_image_desc
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#pragma weak bl1_plat_fwu_done
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#pragma weak bl1_plat_handle_pre_image_load
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#pragma weak bl1_plat_handle_post_image_load
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unsigned int bl1_plat_get_next_image_id(void)
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{
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/* BL2 load will be done by default. */
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return BL2_IMAGE_ID;
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}
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void bl1_plat_set_ep_info(unsigned int image_id,
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struct entry_point_info *ep_info)
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{
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}
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int bl1_plat_handle_pre_image_load(unsigned int image_id)
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{
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return 0;
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}
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/*
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* Following is the default definition that always
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* returns BL2 image details.
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*/
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struct image_desc *bl1_plat_get_image_desc(unsigned int image_id)
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{
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static image_desc_t bl2_img_desc = BL2_IMAGE_DESC;
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return &bl2_img_desc;
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}
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__dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved)
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{
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while (1)
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wfi();
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}
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/*
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* The Platforms must override with real definition.
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*/
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#pragma weak bl1_plat_mem_check
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int bl1_plat_mem_check(uintptr_t mem_base, unsigned int mem_size,
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unsigned int flags)
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{
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assert(0);
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return -ENOMEM;
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}
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/*
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* Default implementation for bl1_plat_handle_post_image_load(). This function
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* populates the default arguments to BL2. The BL2 memory layout structure
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* is allocated and the calculated layout is populated in arg1 to BL2.
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*/
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int bl1_plat_handle_post_image_load(unsigned int image_id)
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{
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meminfo_t *bl2_tzram_layout;
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meminfo_t *bl1_tzram_layout;
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image_desc_t *image_desc;
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entry_point_info_t *ep_info;
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if (image_id != BL2_IMAGE_ID)
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return 0;
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/* Get the image descriptor */
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image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
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assert(image_desc != NULL);
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/* Get the entry point info */
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ep_info = &image_desc->ep_info;
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/* Find out how much free trusted ram remains after BL1 load */
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bl1_tzram_layout = bl1_plat_sec_mem_layout();
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/*
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* Create a new layout of memory for BL2 as seen by BL1 i.e.
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* tell it the amount of total and free memory available.
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* This layout is created at the first free address visible
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* to BL2. BL2 will read the memory layout before using its
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* memory for other purposes.
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*/
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bl2_tzram_layout = (meminfo_t *) bl1_tzram_layout->total_base;
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bl1_calc_bl2_mem_layout(bl1_tzram_layout, bl2_tzram_layout);
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ep_info->args.arg1 = (uintptr_t)bl2_tzram_layout;
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VERBOSE("BL1: BL2 memory layout address = %p\n",
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(void *) bl2_tzram_layout);
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return 0;
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}
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