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fw: Implement redundancy of partition table

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This commit is contained in:
Michael Cardell Widerkrantz 2025-04-04 14:32:15 +02:00
parent 6cae31dc1e
commit d85d60db72
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GPG Key ID: D3DB3DDF57E704E5
2 changed files with 28 additions and 14 deletions
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36
hw/application_fpga/fw/tk1/partition_table.c
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@ -26,30 +26,42 @@ void part_digest(struct partition_table *part_table, uint8_t *out_digest, size_t
int part_table_read(struct partition_table_storage *storage)
{
uint32_t offset[2] = {
ADDR_PARTITION_TABLE_0,
ADDR_PARTITION_TABLE_1,
};
uint8_t check_digest[PART_DIGEST_SIZE];
flash_release_powerdown();
memset(storage, 0x00, sizeof(*storage));
flash_read_data(ADDR_PARTITION_TABLE, (uint8_t *)storage,
for (int i = 0; i < 2; i ++) {
flash_read_data(offset[i], (uint8_t *)storage,
sizeof(*storage));
part_digest(&storage->table, check_digest, sizeof(check_digest));
// TODO: Implement redundancy
uint8_t check_digest[PART_DIGEST_SIZE];
part_digest(&storage->table, check_digest, sizeof(check_digest));
if (!memeq(check_digest, storage->check_digest, sizeof(check_digest))) {
return -1;
if (memeq(check_digest, storage->check_digest, sizeof(check_digest))) {
return 0;
}
}
return 0;
return -1;
}
int part_table_write(struct partition_table_storage *storage)
{
uint32_t offset[2] = {
ADDR_PARTITION_TABLE_0,
ADDR_PARTITION_TABLE_1,
};
part_digest(&storage->table, storage->check_digest, sizeof(storage->check_digest));
flash_sector_erase(ADDR_PARTITION_TABLE);
flash_write_data(ADDR_PARTITION_TABLE, (uint8_t *)storage,
sizeof(*storage));
for (int i = 0; i < 2; i ++) {
flash_sector_erase(offset[i]);
flash_write_data(offset[i], (uint8_t *)storage,
sizeof(*storage));
}
return 0;
}

6
hw/application_fpga/fw/tk1/partition_table.h
View File

@ -21,6 +21,7 @@
/* storage 3 128KiB 0xB0000 */
/* storage 4 128KiB 0xD0000 */
/* ---- ---- ---- */
/* Partition2 64KiB 0xf0000 */
/* To simplify all blocks are aligned with the 64KiB blocks on the W25Q80DL
* flash. */
@ -30,13 +31,14 @@
#define ADDR_BITSTREAM 0UL
#define SIZE_BITSTREAM 0x20000UL // 128KiB
#define ADDR_PARTITION_TABLE (ADDR_BITSTREAM + SIZE_BITSTREAM)
#define ADDR_PARTITION_TABLE_0 (ADDR_BITSTREAM + SIZE_BITSTREAM)
#define ADDR_PARTITION_TABLE_1 0xf0000
#define SIZE_PARTITION_TABLE \
0x10000UL // 64KiB, 60 KiB reserved, 2 flash pages (2 x 4KiB) for the
// partition table
#define N_PRELOADED_APP 2
#define ADDR_PRE_LOADED_APP_0 (ADDR_PARTITION_TABLE + SIZE_PARTITION_TABLE)
#define ADDR_PRE_LOADED_APP_0 (ADDR_PARTITION_TABLE_0 + SIZE_PARTITION_TABLE)
#define SIZE_PRE_LOADED_APP 0x20000UL // 128KiB
#define ADDR_STORAGE_AREA (ADDR_PRE_LOADED_APP_0 + (N_PRELOADED_APP * SIZE_PRE_LOADED_APP))