mirror of
https://github.com/tillitis/tillitis-key1.git
synced 2024-12-27 00:19:31 -05:00
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
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// Copyright (C) 2024 - Tillitis AB
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// SPDX-License-Identifier: GPL-2.0-only
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#include "preload_app.h"
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#include "../tk1_mem.h"
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#include "flash.h"
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#include "lib.h"
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#include "partition_table.h"
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#include <stdbool.h>
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#include <stdint.h>
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/* Returns non-zero if the app is valid */
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bool preload_check_valid_app(partition_table_t *part_table)
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{
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if (part_table->pre_app_data.status == 0x00 &&
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part_table->pre_app_data.size == 0) {
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/*No valid app*/
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return false;
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// TODO: Should we also check nonce, authentication digest for
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// non-zero?
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}
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return true;
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}
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/* Loads a preloaded app from flash to app RAM */
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int preload_start(partition_table_t *part_table)
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{
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/*Check for a valid app in flash */
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if (!preload_check_valid_app(part_table)) {
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return -1;
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}
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uint8_t *loadaddr = (uint8_t *)TK1_RAM_BASE;
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// TODO: Check authentication digest
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// TODO: Should this function set *app_size?
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/* Read from flash, straight into RAM */
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int ret = flash_read_data(ADDR_PRE_LOADED_APP, loadaddr,
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part_table->pre_app_data.size);
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return ret;
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}
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int preload_store(partition_table_t *part_table)
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{
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// TODO: Can reuse the app loading context in main, to keep track of
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// where to store.
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// Most likely needs to aggregate some data, before it writes to flash.
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/*Check for a valid app in flash, bale out if it already exists */
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if (preload_check_valid_app(part_table)) {
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return -1;
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}
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return 0;
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}
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int preload_delete(partition_table_t *part_table)
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{
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/*Check for a valid app in flash */
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if (!preload_check_valid_app(part_table)) {
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return 0;
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// TODO: Nothing here, return zero like all is good?
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}
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part_table->pre_app_data.size = 0;
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part_table->pre_app_data.status = 0;
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memset(part_table->pre_app_data.auth.nonce, 0x00,
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sizeof(part_table->pre_app_data.auth.nonce));
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memset(part_table->pre_app_data.auth.authentication_digest, 0x00,
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sizeof(part_table->pre_app_data.auth.authentication_digest));
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part_table_write(part_table);
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flash_block_64_erase(ADDR_PRE_LOADED_APP); // Erase first 64 KB block
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flash_block_64_erase(ADDR_PRE_LOADED_APP +
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0x10000); // Erase second 64 KB block
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return 0;
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}
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