Add a generic function which can be used to compute the CRC32 value of a region of RAM.
Signed-off-by: Liam Beguin liambeguin@gmail.com --- test/py/u_boot_utils.py | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/test/py/u_boot_utils.py b/test/py/u_boot_utils.py index 64584494e463..de9ee2643f51 100644 --- a/test/py/u_boot_utils.py +++ b/test/py/u_boot_utils.py @@ -11,6 +11,7 @@ import os.path import pytest import sys import time +import re
def md5sum_data(data): """Calculate the MD5 hash of some data. @@ -310,3 +311,25 @@ def persistent_file_helper(u_boot_log, filename): """
return PersistentFileHelperCtxMgr(u_boot_log, filename) + +def crc32(u_boot_console, address, count): + """Helper function used to compute the CRC32 value of a section of RAM. + + Args: + u_boot_console: A U-Boot console connection. + address: Address where data starts. + count: Amount of data to use for calculation. + + Returns: + CRC32 value + """ + + bcfg = u_boot_console.config.buildconfig + has_cmd_crc32 = bcfg.get('config_cmd_crc32', 'n') == 'y' + assert has_cmd_crc32, 'Cannot compute crc32 without CONFIG_CMD_CRC32.' + output = u_boot_console.run_command('crc32 %08x %x' % (address, count)) + + m = re.search('==> ([0-9a-fA-F]{8})$', output) + assert m, 'CRC32 operation failed.' + + return m.group(1)