mirror of
https://github.com/tillitis/tillitis-key1.git
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2c1c05f180
- Add per app flash storage
- Adds four data areas. An app can allocate an area. Once allocated
the area is tied to the CDI of the app and can only be
read/written/deallocated by the same app.
- Add two pre loaded app slots to flash
- Load an app from the first slot at boot. The app digest must match a
specific digest specified in firmware.
- Optionally load an app from the second slot
- Add a resetinfo area in FW_RAM which is used to signal an app's intent
of resetting the system and, optionally, pass data to firmware or the
next app in a bootchain.
Co-authored-by: Jonas Thörnblad <jonas@tillitis.se>
Co-authored-by: Mikael Ågren <mikael@tillitis.se>
Co-authored-by: Daniel Jobson <jobson@tillitis.se>
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
// Copyright (C) 2024 - Tillitis AB
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// SPDX-License-Identifier: GPL-2.0-only
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#ifndef PARTITION_TABLE_H
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#define PARTITION_TABLE_H
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#include <stdint.h>
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/* ---- Flash ---- ---- */
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/* name size start addr */
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/* ---- ---- ---- */
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/* bitstream 128KiB 0x00 */
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/* ---- ---- ---- */
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/* Partition 64KiB 0x20000 */
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/* ---- ---- ---- */
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/* Pre load 1 128KiB 0x30000 */
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/* Pre load 2 128KiB 0x50000 */
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/* ---- ---- ---- */
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/* storage 1 128KiB 0x70000 */
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/* storage 2 128KiB 0x90000 */
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/* storage 3 128KiB 0xB0000 */
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/* storage 4 128KiB 0xD0000 */
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/* ---- ---- ---- */
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/* Partition2 64KiB 0xf0000 */
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/* To simplify all blocks are aligned with the 64KiB blocks on the W25Q80DL
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* flash. */
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#define PART_TABLE_VERSION 1
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#define ADDR_BITSTREAM 0UL
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#define SIZE_BITSTREAM 0x20000UL // 128KiB
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#define ADDR_PARTITION_TABLE_0 (ADDR_BITSTREAM + SIZE_BITSTREAM)
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#define ADDR_PARTITION_TABLE_1 0xf0000
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#define SIZE_PARTITION_TABLE \
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0x10000UL // 64KiB, 60 KiB reserved, 2 flash pages (2 x 4KiB) for the
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// partition table
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#define N_PRELOADED_APP 2
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#define ADDR_PRE_LOADED_APP_0 (ADDR_PARTITION_TABLE_0 + SIZE_PARTITION_TABLE)
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#define SIZE_PRE_LOADED_APP 0x20000UL // 128KiB
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#define ADDR_STORAGE_AREA \
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(ADDR_PRE_LOADED_APP_0 + (N_PRELOADED_APP * SIZE_PRE_LOADED_APP))
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#define SIZE_STORAGE_AREA 0x20000UL // 128KiB
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#define N_STORAGE_AREA 4
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#define PART_DIGEST_SIZE 16
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enum part_status {
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PART_SLOT0_INVALID = 1,
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};
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/* Partition Table */
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/*- Table header */
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/* - 1 bytes Version */
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/**/
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/*- Pre-loaded device app 1 */
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/* - 4 bytes length. */
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/* - 32 bytes digest. */
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/* - 64 bytes signature. */
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/**/
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/*- Pre-loaded device app 2 */
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/* - 4 bytes length. */
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/* - 32 bytes digest. */
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/* - 64 bytes signature. */
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/**/
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/*- Device app storage area */
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/* - 1 byte status. */
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/* - 16 bytes random nonce. */
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/* - 16 bytes authentication tag. */
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struct auth_metadata {
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uint8_t nonce[16];
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uint8_t authentication_digest[16];
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} __attribute__((packed));
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struct pre_loaded_app_metadata {
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uint32_t size;
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uint8_t digest[32];
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uint8_t signature[64];
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} __attribute__((packed));
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struct app_storage_area {
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uint8_t status;
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struct auth_metadata auth;
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} __attribute__((packed));
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struct table_header {
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uint8_t version;
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} __attribute__((packed));
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struct partition_table {
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struct table_header header;
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struct pre_loaded_app_metadata pre_app_data[N_PRELOADED_APP];
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struct app_storage_area app_storage[N_STORAGE_AREA];
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} __attribute__((packed));
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struct partition_table_storage {
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struct partition_table table;
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uint8_t check_digest[PART_DIGEST_SIZE];
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} __attribute__((packed));
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enum part_status part_get_status(void);
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int part_table_read(struct partition_table_storage *storage);
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int part_table_write(struct partition_table_storage *storage);
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#endif
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