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https://github.com/ARM-software/arm-trusted-firmware.git
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6a4da29058
Layout calculation is spread out between core BL1 logic and common platform code. Relocate these into common platform code so they are organised logically. Change-Id: I8b05403e41b800957a0367316cecd373d10bb1a4 Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/*
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* Copyright (c) 2015-2024, 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 (true)
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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 *bl1_tzram_layout;
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image_desc_t *image_desc;
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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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/* 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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* Convey this information to BL2 by storing the layout at the first free
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* address visible to BL2.
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*/
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bl1_plat_calc_bl2_layout(bl1_tzram_layout,
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(meminfo_t *)bl1_tzram_layout->total_base);
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image_desc->ep_info.args.arg1 = (uintptr_t)bl1_tzram_layout->total_base;
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VERBOSE("BL1: BL2 memory layout address = %p\n",
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(void *)image_desc->ep_info.args.arg1);
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return 0;
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}
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/*******************************************************************************
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* Helper utility to calculate the BL2 memory layout taking into consideration
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* the BL1 RW data assuming that it is at the top of the memory layout.
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******************************************************************************/
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void bl1_plat_calc_bl2_layout(const meminfo_t *bl1_mem_layout,
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meminfo_t *bl2_mem_layout)
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{
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assert(bl1_mem_layout != NULL);
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assert(bl2_mem_layout != NULL);
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/*
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* Remove BL1 RW data from the scope of memory visible to BL2.
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* This is assuming BL1 RW data is at the top of bl1_mem_layout.
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*/
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assert(BL1_RW_BASE > bl1_mem_layout->total_base);
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bl2_mem_layout->total_base = bl1_mem_layout->total_base;
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bl2_mem_layout->total_size = BL1_RW_BASE - bl1_mem_layout->total_base;
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flush_dcache_range((uintptr_t)bl2_mem_layout, sizeof(meminfo_t));
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}
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