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137 lines
3.3 KiB
137 lines
3.3 KiB
/*
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* Copyright (c) 2018-2020, 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 <arch_helpers.h>
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#include <common/bl_common.h>
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#include <common/debug.h>
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#include <lib/xlat_tables/xlat_tables_compat.h>
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#include <plat/common/platform.h>
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#include <services/arm_arch_svc.h>
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#include <smccc_helpers.h>
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#include <tools_share/firmware_encrypted.h>
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/*
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* The following platform functions are weakly defined. The Platforms
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* may redefine with strong definition.
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*/
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#pragma weak bl2_el3_plat_prepare_exit
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#pragma weak plat_error_handler
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#pragma weak bl2_plat_preload_setup
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#pragma weak bl2_plat_handle_pre_image_load
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#pragma weak bl2_plat_handle_post_image_load
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#pragma weak plat_try_next_boot_source
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#pragma weak plat_get_enc_key_info
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#pragma weak plat_is_smccc_feature_available
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#pragma weak plat_get_soc_version
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#pragma weak plat_get_soc_revision
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int32_t plat_get_soc_version(void)
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{
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return SMC_ARCH_CALL_NOT_SUPPORTED;
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}
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int32_t plat_get_soc_revision(void)
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{
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return SMC_ARCH_CALL_NOT_SUPPORTED;
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}
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int32_t plat_is_smccc_feature_available(u_register_t fid __unused)
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{
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return SMC_ARCH_CALL_NOT_SUPPORTED;
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}
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void bl2_el3_plat_prepare_exit(void)
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{
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}
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void __dead2 plat_error_handler(int err)
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{
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while (1)
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wfi();
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}
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void bl2_plat_preload_setup(void)
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{
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}
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int bl2_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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int bl2_plat_handle_post_image_load(unsigned int image_id)
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{
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return 0;
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}
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int plat_try_next_boot_source(void)
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{
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return 0;
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}
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/*
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* Weak implementation to provide dummy decryption key only for test purposes,
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* platforms must override this API for any real world firmware encryption
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* use-case.
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*/
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int plat_get_enc_key_info(enum fw_enc_status_t fw_enc_status, uint8_t *key,
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size_t *key_len, unsigned int *flags,
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const uint8_t *img_id, size_t img_id_len)
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{
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#define DUMMY_FIP_ENC_KEY { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \
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0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \
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0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \
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0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef }
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const uint8_t dummy_key[] = DUMMY_FIP_ENC_KEY;
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assert(*key_len >= sizeof(dummy_key));
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*key_len = sizeof(dummy_key);
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memcpy(key, dummy_key, *key_len);
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*flags = 0;
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return 0;
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}
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/*
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* Set up the page tables for the generic and platform-specific memory regions.
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* The size of the Trusted SRAM seen by the BL image must be specified as well
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* as an array specifying the generic memory regions which can be;
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* - Code section;
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* - Read-only data section;
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* - Init code section, if applicable
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* - Coherent memory region, if applicable.
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*/
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void __init setup_page_tables(const mmap_region_t *bl_regions,
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const mmap_region_t *plat_regions)
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{
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#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
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const mmap_region_t *regions = bl_regions;
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while (regions->size != 0U) {
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VERBOSE("Region: 0x%lx - 0x%lx has attributes 0x%x\n",
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regions->base_va,
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regions->base_va + regions->size,
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regions->attr);
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regions++;
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}
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#endif
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/*
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* Map the Trusted SRAM with appropriate memory attributes.
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* Subsequent mappings will adjust the attributes for specific regions.
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*/
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mmap_add(bl_regions);
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/* Now (re-)map the platform-specific memory regions */
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mmap_add(plat_regions);
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/* Create the page tables to reflect the above mappings */
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init_xlat_tables();
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}
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