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refactor(storage): Clean up norcow.c.

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[no changelog]
pull/3522/head
Andrew Kozlik 6 months ago committed by TychoVrahe
parent b2f05f187f
commit 0c6c1b31ff
2 changed files with 155 additions and 300 deletions
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10
storage/flash_common.h
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@ -22,6 +22,16 @@ typedef uint32_t flash_block_t;
typedef uint32_t flash_block_t[FLASH_BLOCK_WORDS];
#endif
#if FLASH_BLOCK_WORDS == 1
#define FLASH_ALIGN(X) (((X) + 3) & ~3)
#define FLASH_IS_ALIGNED(X) (((X)&3) == 0)
#elif FLASH_BLOCK_WORDS == 4
#define FLASH_ALIGN(X) (((X) + 0xF) & ~0xF)
#define FLASH_IS_ALIGNED(X) (((X)&0xF) == 0)
#else
#error Unsupported number of FLASH_BLOCK_WORDS.
#endif
void flash_init(void);
secbool __wur flash_unlock_write(void);

445
storage/norcow.c
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@ -21,6 +21,7 @@
#include "common.h"
#include "flash.h"
#include "memzero.h"
#include "norcow.h"
#include "storage_utils.h"
@ -29,8 +30,8 @@
// NRCW = 4e524357
#define NORCOW_MAGIC_V0 ((uint32_t)0x5743524e)
#define NORCOW_MAGIC_LEN NORCOW_WORD_SIZE
#define NORCOW_VERSION_LEN NORCOW_WORD_SIZE
#define NORCOW_MAGIC_LEN sizeof(uint32_t)
#define NORCOW_VERSION_LEN sizeof(uint32_t)
// The key value which is used to indicate that the entry is not set.
#define NORCOW_KEY_FREE (0xFFFF)
@ -43,26 +44,23 @@
#ifdef FLASH_BYTE_ACCESS
#define COUNTER_TAIL_WORDS 2
#define NORCOW_WORD_SIZE (sizeof(uint32_t))
#define NORCOW_MAX_PREFIX_LEN (NORCOW_WORD_SIZE)
#define ALIGN(X) ((X) = ((X) + 3) & ~3)
#define NORCOW_MAX_PREFIX_LEN (FLASH_BLOCK_SIZE)
// The offset from the beginning of the sector where stored items start.
#define NORCOW_STORAGE_START \
(NORCOW_HEADER_LEN + NORCOW_MAGIC_LEN + NORCOW_VERSION_LEN)
#else
#define COUNTER_TAIL_WORDS 0
#define NORCOW_WORD_SIZE (4 * sizeof(uint32_t))
// Small items are encoded more efficiently.
#define NORCOW_SMALL_ITEM_SIZE \
(NORCOW_WORD_SIZE - NORCOW_LEN_LEN - NORCOW_KEY_LEN)
(FLASH_BLOCK_SIZE - NORCOW_LEN_LEN - NORCOW_KEY_LEN)
// Larger items store first part of data with the same QW as key
#define NORCOW_DELETED_FLAG_LEN 1
#define NORCOW_DATA_OPT_SIZE (NORCOW_WORD_SIZE - NORCOW_DELETED_FLAG_LEN)
#define NORCOW_MAX_PREFIX_LEN (NORCOW_WORD_SIZE + NORCOW_DELETED_FLAG_LEN)
#define ALIGN(X) ((X) = ((X) + 0xF) & ~0xF)
#define NORCOW_VALID_FLAG 0xFE
#define NORCOW_VALID_FLAG_LEN 1
#define NORCOW_DATA_OPT_SIZE (FLASH_BLOCK_SIZE - NORCOW_VALID_FLAG_LEN)
#define NORCOW_MAX_PREFIX_LEN (FLASH_BLOCK_SIZE + NORCOW_VALID_FLAG_LEN)
// The offset from the beginning of the sector where stored items start.
#define NORCOW_STORAGE_START (NORCOW_HEADER_LEN + NORCOW_WORD_SIZE)
#define NORCOW_STORAGE_START (NORCOW_HEADER_LEN + FLASH_BLOCK_SIZE)
#endif
// The index of the active reading sector and writing sector. These should be
@ -78,7 +76,7 @@ static uint32_t norcow_free_offset = 0;
static uint16_t norcow_write_buffer_flashed = 0;
#ifndef FLASH_BYTE_ACCESS
static uint32_t norcow_write_buffer[4] = {0};
static flash_block_t norcow_write_buffer = {0};
static uint16_t norcow_write_buffer_filled = 0;
static uint16_t norcow_write_buffer_filled_data = 0;
static int32_t norcow_write_buffer_key = -1;
@ -97,8 +95,8 @@ static const void *norcow_ptr(uint8_t sector, uint32_t offset, uint32_t size) {
* Writes data to given sector, starting from offset
*/
#ifdef FLASH_BYTE_ACCESS
static secbool norcow_write(uint8_t sector, uint32_t offset, uint16_t key,
const uint8_t *data, uint16_t len) {
static secbool write_item(uint8_t sector, uint32_t offset, uint16_t key,
const uint8_t *data, uint16_t len, uint32_t *pos) {
if (sector >= NORCOW_SECTOR_COUNT) {
return secfalse;
}
@ -126,43 +124,38 @@ static secbool norcow_write(uint8_t sector, uint32_t offset, uint16_t key,
}
// pad with zeroes
for (; offset % NORCOW_WORD_SIZE; offset++) {
for (; offset % FLASH_BLOCK_SIZE; offset++) {
ensure(flash_area_write_byte(&STORAGE_AREAS[sector], offset, 0x00), NULL);
}
ensure(flash_lock_write(), NULL);
*pos = offset;
return sectrue;
}
#else
static secbool norcow_write(uint8_t sector, uint32_t offset, uint16_t key,
const uint8_t *data, uint16_t len) {
static secbool write_item(uint8_t sector, uint32_t offset, uint16_t key,
const uint8_t *data, uint16_t len, uint32_t *pos) {
if (sector >= NORCOW_SECTOR_COUNT) {
return secfalse;
}
flash_block_t block = {len | ((uint32_t)key << 16)};
if (len <= NORCOW_SMALL_ITEM_SIZE) {
// the whole item fits into one quadword, let's not waste space
uint16_t len_adjusted = 0x10;
if (offset + len_adjusted > NORCOW_SECTOR_SIZE) {
// the whole item fits into one block, let's not waste space
if (offset + FLASH_BLOCK_SIZE > NORCOW_SECTOR_SIZE) {
return secfalse;
}
ensure(flash_unlock_write(), NULL);
uint32_t d[4];
d[0] = len | ((uint32_t)key << 16);
d[1] = 0;
d[2] = 0;
d[3] = 0;
if (len > 0) {
memcpy(&d[1], data, len); // write data
memcpy(&block[1], data, len); // write data
}
ensure(flash_area_write_quadword(&STORAGE_AREAS[sector], offset, d), NULL);
ensure(flash_unlock_write(), NULL);
ensure(flash_area_write_block(&STORAGE_AREAS[sector], offset, block), NULL);
ensure(flash_lock_write(), NULL);
*pos = offset + FLASH_BLOCK_SIZE;
} else {
uint16_t len_adjusted = ((len) + 0xF) & ~0xF;
uint16_t len_adjusted = FLASH_ALIGN(len);
if (offset + NORCOW_MAX_PREFIX_LEN + len_adjusted > NORCOW_SECTOR_SIZE) {
return secfalse;
@ -170,50 +163,35 @@ static secbool norcow_write(uint8_t sector, uint32_t offset, uint16_t key,
ensure(flash_unlock_write(), NULL);
uint32_t d[4];
d[0] = len | ((uint32_t)key << 16);
d[1] = 0xFFFFFFFF;
d[2] = 0xFFFFFFFF;
d[3] = 0xFFFFFFFF;
// write len
ensure(flash_area_write_quadword(&STORAGE_AREAS[sector], offset, d), NULL);
offset += NORCOW_WORD_SIZE;
ensure(flash_area_write_block(&STORAGE_AREAS[sector], offset, block), NULL);
offset += FLASH_BLOCK_SIZE;
*pos = FLASH_ALIGN(offset + NORCOW_VALID_FLAG_LEN + len);
if (data != NULL) {
memset(d, 0, sizeof(d));
d[0] = 0xFE;
if (len >= NORCOW_DATA_OPT_SIZE) {
// write key and first data part
memcpy(&(((uint8_t *)d)[NORCOW_DELETED_FLAG_LEN]), data,
NORCOW_DATA_OPT_SIZE);
ensure(flash_area_write_quadword(&STORAGE_AREAS[sector], offset, d),
NULL);
offset += NORCOW_WORD_SIZE;
data += NORCOW_DATA_OPT_SIZE;
len -= NORCOW_DATA_OPT_SIZE;
} else {
// write key and first data part
memcpy(&(((uint8_t *)d)[NORCOW_DELETED_FLAG_LEN]), data, len);
ensure(flash_area_write_quadword(&STORAGE_AREAS[sector], offset, d),
NULL);
offset += NORCOW_WORD_SIZE;
data += len;
len = 0;
}
// write key and first data part
uint16_t len_to_write =
len > NORCOW_DATA_OPT_SIZE ? NORCOW_DATA_OPT_SIZE : len;
memset(block, 0, sizeof(block));
block[0] = NORCOW_VALID_FLAG;
memcpy(&(((uint8_t *)block)[NORCOW_VALID_FLAG_LEN]), data, len_to_write);
ensure(flash_area_write_block(&STORAGE_AREAS[sector], offset, block),
NULL);
offset += FLASH_BLOCK_SIZE;
data += len_to_write;
len -= len_to_write;
while (len > 0) {
memset(d, 0, sizeof(d));
uint16_t data_to_write =
len > NORCOW_WORD_SIZE ? NORCOW_WORD_SIZE : len;
memcpy(d, data, data_to_write);
ensure(flash_area_write_quadword(&STORAGE_AREAS[sector], offset, d),
len_to_write = len > FLASH_BLOCK_SIZE ? FLASH_BLOCK_SIZE : len;
memset(block, 0, sizeof(block));
memcpy(block, data, len_to_write);
ensure(flash_area_write_block(&STORAGE_AREAS[sector], offset, block),
NULL);
offset += NORCOW_WORD_SIZE;
data += data_to_write;
len -= data_to_write;
offset += FLASH_BLOCK_SIZE;
data += len_to_write;
len -= len_to_write;
}
memset(d, 0, sizeof(norcow_write_buffer));
memzero(block, sizeof(block));
}
ensure(flash_lock_write(), NULL);
@ -247,33 +225,22 @@ static void erase_sector(uint8_t sector, secbool set_magic) {
#endif
if (sectrue == set_magic) {
#ifdef FLASH_BYTE_ACCESS
ensure(flash_unlock_write(), NULL);
ensure(flash_area_write_word(&STORAGE_AREAS[sector], NORCOW_HEADER_LEN,
NORCOW_MAGIC),
#if FLASH_BLOCK_WORDS == 1
ensure(flash_area_write_block(&STORAGE_AREAS[sector], NORCOW_HEADER_LEN,
NORCOW_MAGIC),
NULL);
ensure(flash_area_write_word(&STORAGE_AREAS[sector],
NORCOW_HEADER_LEN + NORCOW_MAGIC_LEN,
~NORCOW_VERSION),
ensure(flash_area_write_block(&STORAGE_AREAS[sector],
NORCOW_HEADER_LEN + NORCOW_MAGIC_LEN,
~NORCOW_VERSION),
"set version failed");
ensure(flash_lock_write(), NULL);
#else
uint32_t d[4];
d[0] = NORCOW_MAGIC;
d[1] = ~NORCOW_VERSION;
d[2] = 0xFFFFFFFF;
d[3] = 0xFFFFFFFF;
ensure(flash_unlock_write(), NULL);
ensure(
flash_area_write_quadword(&STORAGE_AREAS[sector], NORCOW_HEADER_LEN, d),
"set magic and version failed");
ensure(flash_lock_write(), NULL);
flash_block_t block = {NORCOW_MAGIC, ~NORCOW_VERSION};
ensure(flash_area_write_block(&STORAGE_AREAS[sector], NORCOW_HEADER_LEN,
block),
"set magic and version failed");
#endif
ensure(flash_lock_write(), NULL);
}
}
@ -318,10 +285,10 @@ static secbool read_item(uint8_t sector, uint32_t offset, uint16_t *key,
*pos += (NORCOW_KEY_LEN + NORCOW_SMALL_ITEM_SIZE);
const void *flg = norcow_ptr(sector, *pos, NORCOW_DELETED_FLAG_LEN);
const void *flg = norcow_ptr(sector, *pos, NORCOW_VALID_FLAG_LEN);
if (flg == NULL) return secfalse;
*pos += NORCOW_DELETED_FLAG_LEN;
*pos += NORCOW_VALID_FLAG_LEN;
if (*((const uint8_t *)flg) == 0) {
// Deleted item.
*key = NORCOW_KEY_DELETED;
@ -337,31 +304,10 @@ static secbool read_item(uint8_t sector, uint32_t offset, uint16_t *key,
*val = norcow_ptr(sector, *pos, *len);
if (*val == NULL) return secfalse;
*pos += *len;
ALIGN(*pos);
*pos = FLASH_ALIGN(*pos + *len);
return sectrue;
}
/*
* Writes one item starting from offset
*/
static secbool write_item(uint8_t sector, uint32_t offset, uint16_t key,
const void *val, uint16_t len, uint32_t *pos) {
#ifndef FLASH_BYTE_ACCESS
if (len <= NORCOW_SMALL_ITEM_SIZE) {
*pos = offset + NORCOW_WORD_SIZE;
} else {
*pos = offset + NORCOW_MAX_PREFIX_LEN + len;
ALIGN(*pos);
}
#else
*pos = offset + NORCOW_MAX_PREFIX_LEN + len;
ALIGN(*pos);
#endif
return norcow_write(sector, offset, key, val, len);
}
/*
* Finds the offset from the beginning of the sector where stored items start.
*/
@ -588,6 +534,35 @@ secbool norcow_get_next(uint32_t *offset, uint16_t *key, const void **val,
return secfalse;
}
void norcow_delete_head(const flash_area_t *area, uint32_t len,
uint32_t *val_offset) {
ensure(flash_unlock_write(), NULL);
#ifdef FLASH_BYTE_ACCESS
// Update the prefix to indicate that the item has been deleted.
uint32_t prefix = (uint32_t)len << 16;
ensure(
flash_area_write_word(area, *val_offset - NORCOW_MAX_PREFIX_LEN, prefix),
NULL);
#else
// Move to the beginning of the block.
if (len <= NORCOW_SMALL_ITEM_SIZE) {
// Will delete the entire small item, setting the length to 0
*val_offset -= NORCOW_LEN_LEN + NORCOW_KEY_LEN;
} else {
// Will update the flag to indicate that the old item has been deleted.
// Deletes a portion of old item data too.
*val_offset -= NORCOW_VALID_FLAG_LEN;
}
flash_block_t block = {0};
ensure(flash_area_write_block(area, *val_offset, block), NULL);
// Move to the next block.
*val_offset += FLASH_BLOCK_SIZE;
#endif
ensure(flash_lock_write(), NULL);
}
/*
* Sets the given key, returns status of the operation. If NULL is passed
* as val, then norcow_set allocates a new key of size len. The value should
@ -606,170 +581,65 @@ secbool norcow_set_ex(uint16_t key, const void *val, uint16_t len,
}
const flash_area_t *area = &STORAGE_AREAS[norcow_write_sector];
secbool ret = secfalse;
const void *ptr = NULL;
uint16_t len_old = 0;
*found = find_item(norcow_write_sector, key, &ptr, &len_old);
// Try to update the entry if it already exists.
uint32_t offset = 0;
uint32_t val_offset = 0;
if (sectrue == *found) {
offset =
val_offset =
(const uint8_t *)ptr -
(const uint8_t *)norcow_ptr(norcow_write_sector, 0, NORCOW_SECTOR_SIZE);
// Try to update the entry if it already exists.
#ifdef FLASH_BYTE_ACCESS
if (val != NULL && len_old == len) {
ret = sectrue;
secbool updated = sectrue;
ensure(flash_unlock_write(), NULL);
for (uint16_t i = 0; i < len; i++) {
if (sectrue != flash_area_write_byte(area, offset + i,
if (sectrue != flash_area_write_byte(area, val_offset + i,
((const uint8_t *)val)[i])) {
ret = secfalse;
updated = secfalse;
break;
}
}
ensure(flash_lock_write(), NULL);
}
#else
if (val != NULL && len_old == len) {
if (len <= NORCOW_SMALL_ITEM_SIZE) {
secbool updatable = sectrue;
for (uint16_t i = 0; i < len; i++) {
if (((const uint8_t *)val)[i] != ((const uint8_t *)ptr)[i]) {
updatable = secfalse;
break;
}
}
if (updatable == sectrue) {
ret = sectrue;
ensure(flash_unlock_write(), NULL);
uint32_t d[4];
d[0] = len | ((uint32_t)key << 16);
d[1] = 0;
d[2] = 0;
d[3] = 0;
if (len > 0) {
memcpy(&d[1], val, len); // write len
}
ensure(flash_area_write_quadword(area, offset - 4, d), NULL);
ensure(flash_lock_write(), NULL);
}
} else {
secbool updatable = sectrue;
for (uint16_t i = 0; i < len; i++) {
if (((const uint8_t *)val)[i] != ((const uint8_t *)ptr)[i]) {
updatable = secfalse;
break;
}
}
if (updatable == sectrue) {
ret = sectrue;
uint8_t *v = (uint8_t *)val;
int tmp_len = len;
ensure(flash_unlock_write(), NULL);
uint32_t d[4] = {0};
d[0] = 0xFF;
uint16_t data_to_copy =
((size_t)tmp_len > NORCOW_WORD_SIZE ? NORCOW_WORD_SIZE
: (size_t)tmp_len);
memcpy(&(((uint8_t *)norcow_write_buffer)[NORCOW_DELETED_FLAG_LEN]),
v, data_to_copy);
ensure(flash_area_write_quadword(area,
offset - NORCOW_DELETED_FLAG_LEN, d),
NULL);
offset += data_to_copy;
v += data_to_copy;
tmp_len -= data_to_copy;
while (tmp_len > 0) {
data_to_copy =
((size_t)tmp_len > NORCOW_WORD_SIZE ? NORCOW_WORD_SIZE
: (size_t)tmp_len);
memset(d, 0, sizeof(d));
memcpy(d, v, data_to_copy);
ensure(flash_area_write_quadword(area, offset, d), NULL);
offset += data_to_copy;
v += data_to_copy;
tmp_len -= data_to_copy;
}
ensure(flash_lock_write(), NULL);
}
if (sectrue == updated) {
return sectrue;
}
}
#endif
}
// If the update was not possible then write the entry as a new item.
if (secfalse == ret) {
// Delete the old item.
if (sectrue == *found) {
ensure(flash_unlock_write(), NULL);
// Delete the old item.
if (sectrue == *found) {
uint32_t end = val_offset + len_old;
norcow_delete_head(area, len_old, &val_offset);
uint32_t end = offset + len_old;
#ifdef FLASH_BYTE_ACCESS
// Update the prefix to indicate that the old item has been deleted.
uint32_t prefix = (uint32_t)len_old << 16;
ensure(
flash_area_write_word(area, offset - NORCOW_MAX_PREFIX_LEN, prefix),
NULL);
#else
if (len_old <= NORCOW_SMALL_ITEM_SIZE) {
// Delete entire content of the quadword.
uint32_t d[4] = {0};
ensure(flash_area_write_quadword(area, offset - 4, d), NULL);
// Move to the next quadword.
offset += NORCOW_WORD_SIZE - NORCOW_LEN_LEN - NORCOW_KEY_LEN;
} else {
// Update the flag to indicate that the old item has been deleted.
// deletes a portion of data too
uint32_t d[4] = {0};
ensure(flash_area_write_quadword(area, offset - NORCOW_DELETED_FLAG_LEN,
d),
NULL);
offset += NORCOW_DATA_OPT_SIZE;
}
#endif
// Delete the old item data.
ensure(flash_unlock_write(), NULL);
flash_block_t block = {0};
while (val_offset < end) {
ensure(flash_area_write_block(area, val_offset, block), NULL);
val_offset += FLASH_BLOCK_SIZE;
}
// Delete the old item data.
while (offset < end) {
#ifdef FLASH_BYTE_ACCESS
ensure(flash_area_write_word(area, offset, 0x00000000), NULL);
#else
uint32_t d[4] = {0};
ensure(flash_area_write_quadword(area, offset, d), NULL);
#endif
offset += NORCOW_WORD_SIZE;
}
ensure(flash_lock_write(), NULL);
}
ensure(flash_lock_write(), NULL);
}
// Check whether there is enough free space and compact if full.
if (norcow_free_offset + NORCOW_MAX_PREFIX_LEN + len > NORCOW_SECTOR_SIZE) {
compact();
}
// Write new item.
uint32_t pos = 0;
ret = write_item(norcow_write_sector, norcow_free_offset, key, val, len,
&pos);
if (sectrue == ret) {
norcow_free_offset = pos;
}
// Check whether there is enough free space and compact if full.
if (norcow_free_offset + NORCOW_MAX_PREFIX_LEN + len > NORCOW_SECTOR_SIZE) {
compact();
}
// Write new item.
uint32_t pos = 0;
if (sectrue != write_item(norcow_write_sector, norcow_free_offset, key, val,
len, &pos)) {
return secfalse;
}
return ret;
norcow_free_offset = pos;
return sectrue;
}
/*
@ -788,44 +658,19 @@ secbool norcow_delete(uint16_t key) {
return secfalse;
}
uint32_t offset =
uint32_t val_offset =
(const uint8_t *)ptr -
(const uint8_t *)norcow_ptr(norcow_write_sector, 0, NORCOW_SECTOR_SIZE);
ensure(flash_unlock_write(), NULL);
uint32_t end = offset + len;
#ifdef FLASH_BYTE_ACCESS
// Update the prefix to indicate that the item has been deleted.
uint32_t prefix = (uint32_t)len << 16;
ensure(flash_area_write_word(area, offset - NORCOW_MAX_PREFIX_LEN, prefix),
NULL);
#else
uint32_t d[4] = {0};
if (len <= NORCOW_SMALL_ITEM_SIZE) {
// Delete entire content of the quadword, setting the length to 0.
ensure(flash_area_write_quadword(
area, offset - NORCOW_LEN_LEN - NORCOW_KEY_LEN, d),
NULL);
// Move to the next quadword.
offset += NORCOW_WORD_SIZE - NORCOW_LEN_LEN - NORCOW_KEY_LEN;
} else {
// Update the flag to indicate that the old item has been deleted.
// deletes a portion of data too
ensure(flash_area_write_quadword(area, offset - NORCOW_DELETED_FLAG_LEN, d),
NULL);
offset += NORCOW_DATA_OPT_SIZE;
}
#endif
uint32_t end = val_offset + len;
norcow_delete_head(area, len, &val_offset);
// Delete the item data.
while (offset < end) {
#ifdef FLASH_BYTE_ACCESS
ensure(flash_area_write_word(area, offset, 0x00000000), NULL);
#else
ensure(flash_area_write_quadword(area, offset, d), NULL);
#endif
offset += NORCOW_WORD_SIZE;
ensure(flash_unlock_write(), NULL);
flash_block_t block = {0};
while (val_offset < end) {
ensure(flash_area_write_block(area, val_offset, block), NULL);
val_offset += FLASH_BLOCK_SIZE;
}
ensure(flash_lock_write(), NULL);
@ -844,7 +689,7 @@ secbool norcow_update_word(uint16_t key, uint16_t offset, uint32_t value) {
if (sectrue != find_item(norcow_write_sector, key, &ptr, &len)) {
return secfalse;
}
if ((offset & 3) != 0 || offset >= len) {
if (!FLASH_IS_ALIGNED(offset) || offset >= len) {
return secfalse;
}
uint32_t sector_offset =
@ -952,17 +797,17 @@ secbool norcow_update_bytes(const uint16_t key, const uint8_t *data,
if (norcow_write_buffer_key == -1) {
memset(norcow_write_buffer, 0, sizeof(norcow_write_buffer));
norcow_write_buffer_key = key;
norcow_write_buffer[0] = 0xFE;
norcow_write_buffer_filled = NORCOW_DELETED_FLAG_LEN;
norcow_write_buffer[0] = NORCOW_VALID_FLAG;
norcow_write_buffer_filled = NORCOW_VALID_FLAG_LEN;
norcow_write_buffer_filled_data = 0;
norcow_write_buffer_flashed = 0;
}
uint16_t tmp_len = len;
uint16_t flash_offset =
sector_offset - NORCOW_DELETED_FLAG_LEN + norcow_write_buffer_flashed;
sector_offset - NORCOW_VALID_FLAG_LEN + norcow_write_buffer_flashed;
while (tmp_len > 0) {
uint16_t buffer_space = NORCOW_WORD_SIZE - norcow_write_buffer_filled;
uint16_t buffer_space = FLASH_BLOCK_SIZE - norcow_write_buffer_filled;
uint16_t data_to_copy = (tmp_len > buffer_space ? buffer_space : tmp_len);
memcpy(&((uint8_t *)norcow_write_buffer)[norcow_write_buffer_filled], data,
data_to_copy);
@ -971,20 +816,20 @@ secbool norcow_update_bytes(const uint16_t key, const uint8_t *data,
norcow_write_buffer_filled_data += data_to_copy;
tmp_len -= data_to_copy;
if (norcow_write_buffer_filled == NORCOW_WORD_SIZE ||
if (norcow_write_buffer_filled == FLASH_BLOCK_SIZE ||
(norcow_write_buffer_filled_data + norcow_write_buffer_flashed) ==
allocated_len + NORCOW_DELETED_FLAG_LEN) {
ensure(flash_area_write_quadword(area, flash_offset, norcow_write_buffer),
allocated_len + NORCOW_VALID_FLAG_LEN) {
ensure(flash_area_write_block(area, flash_offset, norcow_write_buffer),
NULL);
ensure(flash_area_write_quadword(area, flash_offset, norcow_write_buffer),
ensure(flash_area_write_block(area, flash_offset, norcow_write_buffer),
NULL);
flash_offset += NORCOW_WORD_SIZE;
flash_offset += FLASH_BLOCK_SIZE;
norcow_write_buffer_filled = 0;
norcow_write_buffer_flashed += NORCOW_WORD_SIZE;
norcow_write_buffer_flashed += FLASH_BLOCK_SIZE;
memset(norcow_write_buffer, 0, sizeof(norcow_write_buffer));
if ((norcow_write_buffer_flashed) >=
allocated_len + NORCOW_DELETED_FLAG_LEN) {
allocated_len + NORCOW_VALID_FLAG_LEN) {
norcow_write_buffer_key = -1;
norcow_write_buffer_flashed = 0;
}

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