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flash/nor/stm32f1x: adjust size of the flash loader buffer 

target_run_flash_async_algorithm expects the source_buffer to have
at least 2 words reserved for read and write pointers in addition to the
FIFO buffer. If the size of the data to be flashed is <= 8 bytes then
the flash function will fail with "corrupted fifo read pointer" error.

Ensure the allocated buffer is big enough to hold both FIFO buffer and
read/write pointers.

Change-Id: I09c22eaac517b8cfea8e0b463f5deb6b98afd267
Signed-off-by: Simon Smiganovski <simon.smiganovski@fruitcore.de>
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7342
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
Simon Smiganovski 2022-11-09 16:32:26 +01:00 committed by Antonio Borneo
parent 6939187853
commit 0d055602c3
1 changed files with 1 additions and 1 deletions
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src/flash/nor/stm32f1x.c
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@ -473,7 +473,7 @@ static int stm32x_write_block_async(struct flash_bank *bank, const uint8_t *buff
/* memory buffer */
buffer_size = target_get_working_area_avail(target);
buffer_size = MIN(hwords_count * 2, MAX(buffer_size, 256));
buffer_size = MIN(hwords_count * 2 + 8, MAX(buffer_size, 256));
/* Normally we allocate all available working area.
* MIN shrinks buffer_size if the size of the written block is smaller.
* MAX prevents using async algo if the available working area is smaller