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flash/stm32h7x: use alignment infrastructure 

Report the 32-byte alignemnt requirement via the bank structure rather
than enforcing it ad-hoc in the write routine. This allows people to do
non-32-byte-aligned writes if they want, with the infrastructure fixing
up the addresses passed to the low-level driver.

Change-Id: I2c4f532f2000435954a900224dbc9f2c30d1cc94
Signed-off-by: Christopher Head <chead@zaber.com>
Reviewed-on: http://openocd.zylin.com/5388
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Christopher Head 2020-01-03 14:49:16 -08:00 committed by Tomas Vanek
parent 2a60ae7fee
commit a6dacdff58
1 changed files with 8 additions and 24 deletions
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32
src/flash/nor/stm32h7x.c
View File

@ -170,6 +170,9 @@ FLASH_BANK_COMMAND_HANDLER(stm32x_flash_bank_command)
stm32x_info->probed = 0;
stm32x_info->user_bank_size = bank->size;
bank->write_start_alignment = FLASH_BLOCK_SIZE;
bank->write_end_alignment = FLASH_BLOCK_SIZE;
return ERROR_OK;
}
@ -610,17 +613,17 @@ static int stm32x_write(struct flash_bank *bank, const uint8_t *buffer,
return ERROR_TARGET_NOT_HALTED;
}
if (offset % FLASH_BLOCK_SIZE) {
LOG_WARNING("offset 0x%" PRIx32 " breaks required 32-byte alignment", offset);
return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
}
/* should be enforced via bank->write_start_alignment */
assert(!(offset % FLASH_BLOCK_SIZE));
/* should be enforced via bank->write_end_alignment */
assert(!(count % FLASH_BLOCK_SIZE));
retval = stm32x_unlock_reg(bank);
if (retval != ERROR_OK)
goto flash_lock;
uint32_t blocks_remaining = count / FLASH_BLOCK_SIZE;
uint32_t bytes_remaining = count % FLASH_BLOCK_SIZE;
/* multiple words (32-bytes) to be programmed in block */
if (blocks_remaining) {
@ -667,25 +670,6 @@ static int stm32x_write(struct flash_bank *bank, const uint8_t *buffer,
blocks_remaining--;
}
if (bytes_remaining) {
retval = stm32x_write_flash_reg(bank, FLASH_CR, FLASH_PG | FLASH_PSIZE_64);
if (retval != ERROR_OK)
goto flash_lock;
retval = target_write_buffer(target, address, bytes_remaining, buffer);
if (retval != ERROR_OK)
goto flash_lock;
/* Force Write buffer of FLASH_BLOCK_SIZE = 32 bytes */
retval = stm32x_write_flash_reg(bank, FLASH_CR, FLASH_PG | FLASH_PSIZE_64 | FLASH_FW);
if (retval != ERROR_OK)
goto flash_lock;
retval = stm32x_wait_flash_op_queue(bank, FLASH_WRITE_TIMEOUT);
if (retval != ERROR_OK)
goto flash_lock;
}
flash_lock:
retval2 = stm32x_lock_reg(bank);
if (retval2 != ERROR_OK)