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37b295fd6e
This test checks we cannot overwrite current running system image. BUG=chrome-os-partner:10262 TEST=Test passed Change-Id: I72be277c9de2114e72000a102d8b885e842ef15a Reviewed-on: https://gerrit.chromium.org/gerrit/27006 Commit-Ready: Vic Yang <victoryang@chromium.org> Reviewed-by: Vic Yang <victoryang@chromium.org> Tested-by: Vic Yang <victoryang@chromium.org>
41 lines
1.2 KiB
Python
41 lines
1.2 KiB
Python
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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#
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# Utility functions for flash related test
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#
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import random
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# Fixed random seed.
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random.seed(1234)
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def get_flash_size(helper):
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helper.ec_command("hcflashinfo")
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return int(helper.wait_output("flash_size = (?P<f>\d+)", use_re=True)["f"])
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def get_ro_size(helper):
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helper.ec_command("rosize")
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return int(helper.wait_output(
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"RO image size = (?P<ro>0x[0-9a-f]+)", use_re=True)["ro"], 16)
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def xor_sum(size, seed, mult, add):
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ret = 0
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for i in xrange(size):
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ret ^= (seed & 0xff)
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seed = seed * mult + add
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return ret
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def test_write(helper, offset, size, expect_fail=False):
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seed = random.randint(2, 10000)
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mult = random.randint(2, 10000)
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add = random.randint(2, 10000)
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helper.ec_command("hcflashwrite %d %d %d %d %d" %
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(offset, size, seed, mult, add))
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if expect_fail:
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helper.wait_output("Command returned error")
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else:
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expected_sum = xor_sum(size, seed, mult, add)
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helper.wait_output("Flash write at %x size %x XOR %x" %
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(offset, size, expected_sum))
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