u-boot/tools/dtoc/test_fdt.py

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#!/usr/bin/python
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2018 Google, Inc
# Written by Simon Glass <sjg@chromium.org>
#
from optparse import OptionParser
import glob
import os
import sys
import unittest
# Bring in the patman libraries
our_path = os.path.dirname(os.path.realpath(__file__))
for dirname in ['../patman', '..']:
sys.path.insert(0, os.path.join(our_path, dirname))
import command
import fdt
from fdt import TYPE_BYTE, TYPE_INT, TYPE_STRING, TYPE_BOOL
import fdt_util
from fdt_util import fdt32_to_cpu
import libfdt
import test_util
import tools
def _GetPropertyValue(dtb, node, prop_name):
"""Low-level function to get the property value based on its offset
This looks directly in the device tree at the property's offset to find
its value. It is useful as a check that the property is in the correct
place.
Args:
node: Node to look in
prop_name: Property name to find
Returns:
Tuple:
Prop object found
Value of property as a string (found using property offset)
"""
prop = node.props[prop_name]
# Add 12, which is sizeof(struct fdt_property), to get to start of data
offset = prop.GetOffset() + 12
data = dtb.GetContents()[offset:offset + len(prop.value)]
return prop, [chr(x) for x in data]
class TestFdt(unittest.TestCase):
"""Tests for the Fdt module
This includes unit tests for some functions and functional tests for the fdt
module.
"""
@classmethod
def setUpClass(cls):
tools.PrepareOutputDir(None)
@classmethod
def tearDownClass(cls):
tools._FinaliseForTest()
def setUp(self):
self.dtb = fdt.FdtScan('tools/dtoc/dtoc_test_simple.dts')
def testFdt(self):
"""Test that we can open an Fdt"""
self.dtb.Scan()
root = self.dtb.GetRoot()
self.assertTrue(isinstance(root, fdt.Node))
def testGetNode(self):
"""Test the GetNode() method"""
node = self.dtb.GetNode('/spl-test')
self.assertTrue(isinstance(node, fdt.Node))
node = self.dtb.GetNode('/i2c@0/pmic@9')
self.assertTrue(isinstance(node, fdt.Node))
self.assertEqual('pmic@9', node.name)
self.assertIsNone(self.dtb.GetNode('/i2c@0/pmic@9/missing'))
def testFlush(self):
"""Check that we can flush the device tree out to its file"""
fname = self.dtb._fname
with open(fname) as fd:
data = fd.read()
os.remove(fname)
with self.assertRaises(IOError):
open(fname)
self.dtb.Flush()
with open(fname) as fd:
data = fd.read()
def testPack(self):
"""Test that packing a device tree works"""
self.dtb.Pack()
def testGetFdt(self):
"""Tetst that we can access the raw device-tree data"""
self.assertTrue(isinstance(self.dtb.GetContents(), bytearray))
def testGetProps(self):
"""Tests obtaining a list of properties"""
node = self.dtb.GetNode('/spl-test')
props = self.dtb.GetProps(node)
self.assertEqual(['boolval', 'bytearray', 'byteval', 'compatible',
'intarray', 'intval', 'longbytearray', 'notstring',
'stringarray', 'stringval', 'u-boot,dm-pre-reloc'],
sorted(props.keys()))
def testCheckError(self):
"""Tests the ChecKError() function"""
with self.assertRaises(ValueError) as e:
fdt.CheckErr(-libfdt.NOTFOUND, 'hello')
self.assertIn('FDT_ERR_NOTFOUND: hello', str(e.exception))
def testGetFdt(self):
node = self.dtb.GetNode('/spl-test')
self.assertEqual(self.dtb, node.GetFdt())
class TestNode(unittest.TestCase):
"""Test operation of the Node class"""
@classmethod
def setUpClass(cls):
tools.PrepareOutputDir(None)
@classmethod
def tearDownClass(cls):
tools._FinaliseForTest()
def setUp(self):
self.dtb = fdt.FdtScan('tools/dtoc/dtoc_test_simple.dts')
self.node = self.dtb.GetNode('/spl-test')
def testOffset(self):
"""Tests that we can obtain the offset of a node"""
self.assertTrue(self.node.Offset() > 0)
def testDelete(self):
"""Tests that we can delete a property"""
node2 = self.dtb.GetNode('/spl-test2')
offset1 = node2.Offset()
self.node.DeleteProp('intval')
offset2 = node2.Offset()
self.assertTrue(offset2 < offset1)
self.node.DeleteProp('intarray')
offset3 = node2.Offset()
self.assertTrue(offset3 < offset2)
with self.assertRaises(libfdt.FdtException):
self.node.DeleteProp('missing')
def testDeleteGetOffset(self):
"""Test that property offset update when properties are deleted"""
self.node.DeleteProp('intval')
prop, value = _GetPropertyValue(self.dtb, self.node, 'longbytearray')
self.assertEqual(prop.value, value)
def testFindNode(self):
"""Tests that we can find a node using the FindNode() functoin"""
node = self.dtb.GetRoot().FindNode('i2c@0')
self.assertEqual('i2c@0', node.name)
subnode = node.FindNode('pmic@9')
self.assertEqual('pmic@9', subnode.name)
self.assertEqual(None, node.FindNode('missing'))
def testRefreshMissingNode(self):
"""Test refreshing offsets when an extra node is present in dtb"""
# Delete it from our tables, not the device tree
del self.dtb._root.subnodes[-1]
with self.assertRaises(ValueError) as e:
self.dtb.Refresh()
self.assertIn('Internal error, offset', str(e.exception))
def testRefreshExtraNode(self):
"""Test refreshing offsets when an expected node is missing"""
# Delete it from the device tre, not our tables
self.dtb.GetFdtObj().del_node(self.node.Offset())
with self.assertRaises(ValueError) as e:
self.dtb.Refresh()
self.assertIn('Internal error, node name mismatch '
'spl-test != spl-test2', str(e.exception))
def testRefreshMissingProp(self):
"""Test refreshing offsets when an extra property is present in dtb"""
# Delete it from our tables, not the device tree
del self.node.props['notstring']
with self.assertRaises(ValueError) as e:
self.dtb.Refresh()
self.assertIn("Internal error, property 'notstring' missing, offset ",
str(e.exception))
def testLookupPhandle(self):
"""Test looking up a single phandle"""
dtb = fdt.FdtScan('tools/dtoc/dtoc_test_phandle.dts')
node = dtb.GetNode('/phandle-source2')
prop = node.props['clocks']
target = dtb.GetNode('/phandle-target')
self.assertEqual(target, dtb.LookupPhandle(fdt32_to_cpu(prop.value)))
class TestProp(unittest.TestCase):
"""Test operation of the Prop class"""
@classmethod
def setUpClass(cls):
tools.PrepareOutputDir(None)
@classmethod
def tearDownClass(cls):
tools._FinaliseForTest()
def setUp(self):
self.dtb = fdt.FdtScan('tools/dtoc/dtoc_test_simple.dts')
self.node = self.dtb.GetNode('/spl-test')
self.fdt = self.dtb.GetFdtObj()
def testMissingNode(self):
self.assertEqual(None, self.dtb.GetNode('missing'))
def testPhandle(self):
dtb = fdt.FdtScan('tools/dtoc/dtoc_test_phandle.dts')
node = dtb.GetNode('/phandle-source2')
prop = node.props['clocks']
self.assertTrue(fdt32_to_cpu(prop.value) > 0)
def _ConvertProp(self, prop_name):
"""Helper function to look up a property in self.node and return it
Args:
Property name to find
Return fdt.Prop object for this property
"""
p = self.fdt.getprop(self.node.Offset(), prop_name)
return fdt.Prop(self.node, -1, prop_name, p)
def testMakeProp(self):
"""Test we can convert all the the types that are supported"""
prop = self._ConvertProp('boolval')
self.assertEqual(fdt.TYPE_BOOL, prop.type)
self.assertEqual(True, prop.value)
prop = self._ConvertProp('intval')
self.assertEqual(fdt.TYPE_INT, prop.type)
self.assertEqual(1, fdt32_to_cpu(prop.value))
prop = self._ConvertProp('intarray')
self.assertEqual(fdt.TYPE_INT, prop.type)
val = [fdt32_to_cpu(val) for val in prop.value]
self.assertEqual([2, 3, 4], val)
prop = self._ConvertProp('byteval')
self.assertEqual(fdt.TYPE_BYTE, prop.type)
self.assertEqual(5, ord(prop.value))
prop = self._ConvertProp('longbytearray')
self.assertEqual(fdt.TYPE_BYTE, prop.type)
val = [ord(val) for val in prop.value]
self.assertEqual([9, 10, 11, 12, 13, 14, 15, 16, 17], val)
prop = self._ConvertProp('stringval')
self.assertEqual(fdt.TYPE_STRING, prop.type)
self.assertEqual('message', prop.value)
prop = self._ConvertProp('stringarray')
self.assertEqual(fdt.TYPE_STRING, prop.type)
self.assertEqual(['multi-word', 'message'], prop.value)
prop = self._ConvertProp('notstring')
self.assertEqual(fdt.TYPE_BYTE, prop.type)
val = [ord(val) for val in prop.value]
self.assertEqual([0x20, 0x21, 0x22, 0x10, 0], val)
def testGetEmpty(self):
"""Tests the GetEmpty() function for the various supported types"""
self.assertEqual(True, fdt.Prop.GetEmpty(fdt.TYPE_BOOL))
self.assertEqual(chr(0), fdt.Prop.GetEmpty(fdt.TYPE_BYTE))
self.assertEqual(chr(0) * 4, fdt.Prop.GetEmpty(fdt.TYPE_INT))
self.assertEqual('', fdt.Prop.GetEmpty(fdt.TYPE_STRING))
def testGetOffset(self):
"""Test we can get the offset of a property"""
prop, value = _GetPropertyValue(self.dtb, self.node, 'longbytearray')
self.assertEqual(prop.value, value)
def testWiden(self):
"""Test widening of values"""
node2 = self.dtb.GetNode('/spl-test2')
prop = self.node.props['intval']
# No action
prop2 = node2.props['intval']
prop.Widen(prop2)
self.assertEqual(fdt.TYPE_INT, prop.type)
self.assertEqual(1, fdt32_to_cpu(prop.value))
# Convert singla value to array
prop2 = self.node.props['intarray']
prop.Widen(prop2)
self.assertEqual(fdt.TYPE_INT, prop.type)
self.assertTrue(isinstance(prop.value, list))
# A 4-byte array looks like a single integer. When widened by a longer
# byte array, it should turn into an array.
prop = self.node.props['longbytearray']
prop2 = node2.props['longbytearray']
self.assertFalse(isinstance(prop2.value, list))
self.assertEqual(4, len(prop2.value))
prop2.Widen(prop)
self.assertTrue(isinstance(prop2.value, list))
self.assertEqual(9, len(prop2.value))
# Similarly for a string array
prop = self.node.props['stringval']
prop2 = node2.props['stringarray']
self.assertFalse(isinstance(prop.value, list))
self.assertEqual(7, len(prop.value))
prop.Widen(prop2)
self.assertTrue(isinstance(prop.value, list))
self.assertEqual(3, len(prop.value))
# Enlarging an existing array
prop = self.node.props['stringarray']
prop2 = node2.props['stringarray']
self.assertTrue(isinstance(prop.value, list))
self.assertEqual(2, len(prop.value))
prop.Widen(prop2)
self.assertTrue(isinstance(prop.value, list))
self.assertEqual(3, len(prop.value))
def testAdd(self):
"""Test adding properties"""
self.fdt.pack()
# This function should automatically expand the device tree
self.node.AddZeroProp('one')
self.node.AddZeroProp('two')
self.node.AddZeroProp('three')
# Updating existing properties should be OK, since the device-tree size
# does not change
self.fdt.pack()
self.node.SetInt('one', 1)
self.node.SetInt('two', 2)
self.node.SetInt('three', 3)
# This should fail since it would need to increase the device-tree size
with self.assertRaises(libfdt.FdtException) as e:
self.node.SetInt('four', 4)
self.assertIn('FDT_ERR_NOSPACE', str(e.exception))
class TestFdtUtil(unittest.TestCase):
"""Tests for the fdt_util module
This module will likely be mostly replaced at some point, once upstream
libfdt has better Python support. For now, this provides tests for current
functionality.
"""
@classmethod
def setUpClass(cls):
tools.PrepareOutputDir(None)
def setUp(self):
self.dtb = fdt.FdtScan('tools/dtoc/dtoc_test_simple.dts')
self.node = self.dtb.GetNode('/spl-test')
def testGetInt(self):
self.assertEqual(1, fdt_util.GetInt(self.node, 'intval'))
self.assertEqual(3, fdt_util.GetInt(self.node, 'missing', 3))
with self.assertRaises(ValueError) as e:
self.assertEqual(3, fdt_util.GetInt(self.node, 'intarray'))
self.assertIn("property 'intarray' has list value: expecting a single "
'integer', str(e.exception))
def testGetString(self):
self.assertEqual('message', fdt_util.GetString(self.node, 'stringval'))
self.assertEqual('test', fdt_util.GetString(self.node, 'missing',
'test'))
with self.assertRaises(ValueError) as e:
self.assertEqual(3, fdt_util.GetString(self.node, 'stringarray'))
self.assertIn("property 'stringarray' has list value: expecting a "
'single string', str(e.exception))
def testGetBool(self):
self.assertEqual(True, fdt_util.GetBool(self.node, 'boolval'))
self.assertEqual(False, fdt_util.GetBool(self.node, 'missing'))
self.assertEqual(True, fdt_util.GetBool(self.node, 'missing', True))
self.assertEqual(False, fdt_util.GetBool(self.node, 'missing', False))
def testGetByte(self):
self.assertEqual(5, fdt_util.GetByte(self.node, 'byteval'))
self.assertEqual(3, fdt_util.GetByte(self.node, 'missing', 3))
with self.assertRaises(ValueError) as e:
fdt_util.GetByte(self.node, 'longbytearray')
self.assertIn("property 'longbytearray' has list value: expecting a "
'single byte', str(e.exception))
with self.assertRaises(ValueError) as e:
fdt_util.GetByte(self.node, 'intval')
self.assertIn("property 'intval' has length 4, expecting 1",
str(e.exception))
def testGetPhandleList(self):
dtb = fdt.FdtScan('tools/dtoc/dtoc_test_phandle.dts')
node = dtb.GetNode('/phandle-source2')
self.assertEqual([1], fdt_util.GetPhandleList(node, 'clocks'))
node = dtb.GetNode('/phandle-source')
self.assertEqual([1, 2, 11, 3, 12, 13, 1],
fdt_util.GetPhandleList(node, 'clocks'))
self.assertEqual(None, fdt_util.GetPhandleList(node, 'missing'))
def testGetDataType(self):
self.assertEqual(1, fdt_util.GetDatatype(self.node, 'intval', int))
self.assertEqual('message', fdt_util.GetDatatype(self.node, 'stringval',
str))
with self.assertRaises(ValueError) as e:
self.assertEqual(3, fdt_util.GetDatatype(self.node, 'boolval',
bool))
def testFdtCellsToCpu(self):
val = self.node.props['intarray'].value
self.assertEqual(0, fdt_util.fdt_cells_to_cpu(val, 0))
self.assertEqual(2, fdt_util.fdt_cells_to_cpu(val, 1))
dtb2 = fdt.FdtScan('tools/dtoc/dtoc_test_addr64.dts')
node2 = dtb2.GetNode('/test1')
val = node2.props['reg'].value
self.assertEqual(0x1234, fdt_util.fdt_cells_to_cpu(val, 2))
def testEnsureCompiled(self):
"""Test a degenerate case of this function"""
dtb = fdt_util.EnsureCompiled('tools/dtoc/dtoc_test_simple.dts')
self.assertEqual(dtb, fdt_util.EnsureCompiled(dtb))
def testGetPlainBytes(self):
self.assertEqual('fred', fdt_util.get_plain_bytes('fred'))
def RunTestCoverage():
"""Run the tests and check that we get 100% coverage"""
test_util.RunTestCoverage('tools/dtoc/test_fdt.py', None,
['tools/patman/*.py', '*test_fdt.py'], options.build_dir)
def RunTests(args):
"""Run all the test we have for the fdt model
Args:
args: List of positional args provided to fdt. This can hold a test
name to execute (as in 'fdt -t testFdt', for example)
"""
result = unittest.TestResult()
sys.argv = [sys.argv[0]]
test_name = args and args[0] or None
for module in (TestFdt, TestNode, TestProp, TestFdtUtil):
if test_name:
try:
suite = unittest.TestLoader().loadTestsFromName(test_name, module)
except AttributeError:
continue
else:
suite = unittest.TestLoader().loadTestsFromTestCase(module)
suite.run(result)
print result
for _, err in result.errors:
print err
for _, err in result.failures:
print err
if __name__ != '__main__':
sys.exit(1)
parser = OptionParser()
parser.add_option('-B', '--build-dir', type='string', default='b',
help='Directory containing the build output')
parser.add_option('-t', '--test', action='store_true', dest='test',
default=False, help='run tests')
parser.add_option('-T', '--test-coverage', action='store_true',
default=False, help='run tests and check for 100% coverage')
(options, args) = parser.parse_args()
# Run our meagre tests
if options.test:
RunTests(args)
elif options.test_coverage:
RunTestCoverage()