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stm32/storage: Add option for bdev to supply readblock/writeblocks. 

If the underlying block device supports it, it's more efficient to
read/write multiple blocks at once.
This commit is contained in:
Damien George 2018-03-02 23:51:06 +11:00
parent 0210383da5
commit 861080aa3d
1 changed files with 16 additions and 0 deletions
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16
ports/stm32/storage.c
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@ -151,8 +151,10 @@ bool storage_read_block(uint8_t *dest, uint32_t block) {
return true;
#if defined(BDEV_READBLOCK)
} else if (FLASH_PART1_START_BLOCK <= block && block < FLASH_PART1_START_BLOCK + BDEV_NUM_BLOCKS) {
return BDEV_READBLOCK(dest, block - FLASH_PART1_START_BLOCK);
#endif
} else {
return false;
}
@ -163,14 +165,22 @@ bool storage_write_block(const uint8_t *src, uint32_t block) {
if (block == 0) {
// can't write MBR, but pretend we did
return true;
#if defined(BDEV_WRITEBLOCK)
} else if (FLASH_PART1_START_BLOCK <= block && block < FLASH_PART1_START_BLOCK + BDEV_NUM_BLOCKS) {
return BDEV_WRITEBLOCK(src, block - FLASH_PART1_START_BLOCK);
#endif
} else {
return false;
}
}
mp_uint_t storage_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
#if defined(BDEV_READBLOCKS)
if (FLASH_PART1_START_BLOCK <= block_num && block_num + num_blocks <= FLASH_PART1_START_BLOCK + BDEV_NUM_BLOCKS) {
return BDEV_READBLOCKS(dest, block_num - FLASH_PART1_START_BLOCK, num_blocks);
}
#endif
for (size_t i = 0; i < num_blocks; i++) {
if (!storage_read_block(dest + i * FLASH_BLOCK_SIZE, block_num + i)) {
return 1; // error
@ -180,6 +190,12 @@ mp_uint_t storage_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_bl
}
mp_uint_t storage_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
#if defined(BDEV_WRITEBLOCKS)
if (FLASH_PART1_START_BLOCK <= block_num && block_num + num_blocks <= FLASH_PART1_START_BLOCK + BDEV_NUM_BLOCKS) {
return BDEV_WRITEBLOCKS(src, block_num - FLASH_PART1_START_BLOCK, num_blocks);
}
#endif
for (size_t i = 0; i < num_blocks; i++) {
if (!storage_write_block(src + i * FLASH_BLOCK_SIZE, block_num + i)) {
return 1; // error