| # SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) |
| # pylibfdt - Tests for Flat Device Tree manipulation in Python |
| # Copyright (C) 2017 Google, Inc. |
| # Written by Simon Glass <sjg@chromium.org> |
| # |
| |
| import struct |
| import sys |
| import types |
| import unittest |
| |
| sys.path.insert(0, '../pylibfdt') |
| import libfdt |
| from libfdt import Fdt, FdtSw, FdtException, QUIET_NOTFOUND, QUIET_ALL |
| |
| TEST_ADDR_1H = 0xdeadbeef |
| TEST_ADDR_1L = 0x00000000 |
| TEST_ADDR_1 = (TEST_ADDR_1H << 32) | TEST_ADDR_1L |
| TEST_ADDR_1 = 0x8000000000000000 |
| TEST_SIZE_1H = 0x00000000 |
| TEST_SIZE_1L = 0x00100000 |
| TEST_SIZE_1 = (TEST_SIZE_1H << 32) | TEST_SIZE_1L |
| TEST_ADDR_2H = 0 |
| TEST_ADDR_2L = 123456789 |
| TEST_ADDR_2 = (TEST_ADDR_2H << 32) | TEST_ADDR_2L |
| TEST_SIZE_2H = 0 |
| TEST_SIZE_2L = 0o10000 |
| TEST_SIZE_2 = (TEST_SIZE_2H << 32) | TEST_SIZE_2L |
| |
| TEST_VALUE_1 = 0xdeadbeef |
| TEST_VALUE_2 = 123456789 |
| |
| TEST_VALUE64_1H = 0xdeadbeef |
| TEST_VALUE64_1L = 0x01abcdef |
| TEST_VALUE64_1 = (TEST_VALUE64_1H << 32) | TEST_VALUE64_1L |
| |
| PHANDLE_1 = 0x2000 |
| PHANDLE_2 = 0x2001 |
| |
| TEST_BYTES_1 = b'hello world' |
| |
| TEST_STRING_1 = 'hello world' |
| TEST_STRING_2 = 'hi world' |
| TEST_STRING_3 = u'unicode \u01d3' |
| |
| |
| def get_err(err_code): |
| """Convert an error code into an error message |
| |
| Args: |
| err_code: Error code value (FDT_ERR_...) |
| |
| Returns: |
| String error code |
| """ |
| return 'pylibfdt error %d: %s' % (-err_code, libfdt.strerror(-err_code)) |
| |
| def _ReadFdt(fname): |
| """Read a device tree file into an Fdt object, ready for use |
| |
| Args: |
| fname: Filename to read from |
| |
| Returns: |
| Fdt bytearray suitable for passing to libfdt functions |
| """ |
| return libfdt.Fdt(open(fname, mode='rb').read()) |
| |
| class PyLibfdtBasicTests(unittest.TestCase): |
| """Test class for basic pylibfdt access functions |
| |
| Properties: |
| fdt: Device tree file used for testing |
| """ |
| |
| def setUp(self): |
| """Read in the device tree we use for testing""" |
| self.fdt = _ReadFdt('test_tree1.dtb') |
| self.fdt2 = _ReadFdt('test_props.dtb') |
| self.fdt3 = _ReadFdt('aliases.dtb') |
| |
| def GetPropList(self, node_path): |
| """Read a list of properties from a node |
| |
| Args: |
| node_path: Full path to node, e.g. '/subnode@1/subsubnode' |
| |
| Returns: |
| List of property names for that node, e.g. ['compatible', 'reg'] |
| """ |
| prop_list = [] |
| node = self.fdt.path_offset(node_path) |
| poffset = self.fdt.first_property_offset(node, QUIET_NOTFOUND) |
| while poffset > 0: |
| prop = self.fdt.get_property_by_offset(poffset) |
| prop_list.append(prop.name) |
| poffset = self.fdt.next_property_offset(poffset, QUIET_NOTFOUND) |
| return prop_list |
| |
| def GetSubnodes(self, node_path): |
| """Read a list of subnodes from a node |
| |
| Args: |
| node_path: Full path to node, e.g. '/subnode@1/subsubnode' |
| |
| Returns: |
| List of subnode names for that node, e.g. ['subsubnode', 'ss1'] |
| """ |
| subnode_list = [] |
| node = self.fdt.path_offset(node_path) |
| offset = self.fdt.first_subnode(node, QUIET_NOTFOUND) |
| while offset > 0: |
| name = self.fdt.get_name(offset) |
| subnode_list.append(name) |
| offset = self.fdt.next_subnode(offset, QUIET_NOTFOUND) |
| return subnode_list |
| |
| def testImport(self): |
| """Check that we can import the library correctly""" |
| self.assertEquals(type(libfdt), types.ModuleType) |
| |
| def testBadFdt(self): |
| """Check that a filename provided accidentally is not accepted""" |
| with self.assertRaises(FdtException) as e: |
| fdt = libfdt.Fdt(b'a string') |
| self.assertEquals(e.exception.err, -libfdt.BADMAGIC) |
| |
| def testSubnodeOffset(self): |
| """check that we can locate a subnode by name""" |
| node1 = self.fdt.path_offset('/subnode@1') |
| self.assertEquals(self.fdt.subnode_offset(0, 'subnode@1'), node1) |
| |
| with self.assertRaises(FdtException) as e: |
| self.fdt.subnode_offset(0, 'missing') |
| self.assertEquals(e.exception.err, -libfdt.NOTFOUND) |
| |
| node2 = self.fdt.path_offset('/subnode@1/subsubnode') |
| self.assertEquals(self.fdt.subnode_offset(node1, 'subsubnode'), node2) |
| |
| def testPathOffset(self): |
| """Check that we can find the offset of a node""" |
| self.assertEquals(self.fdt.path_offset('/'), 0) |
| self.assertTrue(self.fdt.path_offset('/subnode@1') > 0) |
| with self.assertRaises(FdtException) as e: |
| self.fdt.path_offset('/wibble') |
| self.assertEquals(e.exception.err, -libfdt.NOTFOUND) |
| self.assertEquals(self.fdt.path_offset('/wibble', QUIET_NOTFOUND), |
| -libfdt.NOTFOUND) |
| |
| def testPropertyOffset(self): |
| """Walk through all the properties in the root node""" |
| offset = self.fdt.first_property_offset(0) |
| self.assertTrue(offset > 0) |
| for i in range(5): |
| next_offset = self.fdt.next_property_offset(offset) |
| self.assertTrue(next_offset > offset) |
| offset = next_offset |
| self.assertEquals(self.fdt.next_property_offset(offset, QUIET_NOTFOUND), |
| -libfdt.NOTFOUND) |
| |
| def testPropertyOffsetExceptions(self): |
| """Check that exceptions are raised as expected""" |
| with self.assertRaises(FdtException) as e: |
| self.fdt.first_property_offset(107) |
| self.assertEquals(e.exception.err, -libfdt.BADOFFSET) |
| |
| # Quieten the NOTFOUND exception and check that a BADOFFSET |
| # exception is still raised. |
| with self.assertRaises(FdtException) as e: |
| self.fdt.first_property_offset(107, QUIET_NOTFOUND) |
| self.assertEquals(e.exception.err, -libfdt.BADOFFSET) |
| with self.assertRaises(FdtException) as e: |
| self.fdt.next_property_offset(107, QUIET_NOTFOUND) |
| self.assertEquals(e.exception.err, -libfdt.BADOFFSET) |
| |
| # Check that NOTFOUND can be quietened. |
| node = self.fdt.path_offset('/subnode@1/ss1') |
| self.assertEquals(self.fdt.first_property_offset(node, QUIET_NOTFOUND), |
| -libfdt.NOTFOUND) |
| with self.assertRaises(FdtException) as e: |
| self.fdt.first_property_offset(node) |
| self.assertEquals(e.exception.err, -libfdt.NOTFOUND) |
| |
| def testGetName(self): |
| """Check that we can get the name of a node""" |
| self.assertEquals(self.fdt.get_name(0), '') |
| node = self.fdt.path_offset('/subnode@1/subsubnode') |
| self.assertEquals(self.fdt.get_name(node), 'subsubnode') |
| |
| with self.assertRaises(FdtException) as e: |
| self.fdt.get_name(-2) |
| self.assertEquals(e.exception.err, -libfdt.BADOFFSET) |
| |
| def testGetPropertyByOffset(self): |
| """Check that we can read the name and contents of a property""" |
| root = 0 |
| poffset = self.fdt.first_property_offset(root) |
| prop = self.fdt.get_property_by_offset(poffset) |
| self.assertEquals(prop.name, 'compatible') |
| self.assertEquals(prop, b'test_tree1\0') |
| |
| with self.assertRaises(FdtException) as e: |
| self.fdt.get_property_by_offset(-2) |
| self.assertEquals(e.exception.err, -libfdt.BADOFFSET) |
| self.assertEquals( |
| -libfdt.BADOFFSET, |
| self.fdt.get_property_by_offset(-2, [libfdt.BADOFFSET])) |
| |
| def testGetProp(self): |
| """Check that we can read the contents of a property by name""" |
| root = self.fdt.path_offset('/') |
| value = self.fdt.getprop(root, "compatible") |
| self.assertEquals(value, b'test_tree1\0') |
| self.assertEquals(-libfdt.NOTFOUND, self.fdt.getprop(root, 'missing', |
| QUIET_NOTFOUND)) |
| |
| with self.assertRaises(FdtException) as e: |
| self.fdt.getprop(root, 'missing') |
| self.assertEquals(e.exception.err, -libfdt.NOTFOUND) |
| |
| node = self.fdt.path_offset('/subnode@1/subsubnode') |
| value = self.fdt.getprop(node, "compatible") |
| self.assertEquals(value, b'subsubnode1\0subsubnode\0') |
| |
| def testStrError(self): |
| """Check that we can get an error string""" |
| self.assertEquals(libfdt.strerror(-libfdt.NOTFOUND), |
| 'FDT_ERR_NOTFOUND') |
| |
| def testNextNodeOffset(self): |
| """Check that we can walk through nodes""" |
| node_list = [] |
| node = 0 |
| depth = 0 |
| while depth >= 0: |
| node_list.append([depth, self.fdt.get_name(node)]) |
| node, depth = self.fdt.next_node(node, depth, (libfdt.BADOFFSET,)) |
| self.assertEquals(node_list, [ |
| [0, ''], |
| [1, 'subnode@1'], |
| [2, 'subsubnode'], |
| [2, 'ss1'], |
| [1, 'subnode@2'], |
| [2, 'subsubnode@0'], |
| [2, 'ss2'], |
| ]) |
| |
| def testFirstNextSubnodeOffset(self): |
| """Check that we can walk through subnodes""" |
| node_list = [] |
| node = self.fdt.first_subnode(0, QUIET_NOTFOUND) |
| while node >= 0: |
| node_list.append(self.fdt.get_name(node)) |
| node = self.fdt.next_subnode(node, QUIET_NOTFOUND) |
| self.assertEquals(node_list, ['subnode@1', 'subnode@2']) |
| |
| def testFirstNextSubnodeOffsetExceptions(self): |
| """Check except handling for first/next subnode functions""" |
| node = self.fdt.path_offset('/subnode@1/subsubnode', QUIET_NOTFOUND) |
| self.assertEquals(self.fdt.first_subnode(node, QUIET_NOTFOUND), |
| -libfdt.NOTFOUND) |
| with self.assertRaises(FdtException) as e: |
| self.fdt.first_subnode(node) |
| self.assertEquals(e.exception.err, -libfdt.NOTFOUND) |
| |
| node = self.fdt.path_offset('/subnode@1/ss1', QUIET_NOTFOUND) |
| self.assertEquals(self.fdt.next_subnode(node, QUIET_NOTFOUND), |
| -libfdt.NOTFOUND) |
| with self.assertRaises(FdtException) as e: |
| self.fdt.next_subnode(node) |
| self.assertEquals(e.exception.err, -libfdt.NOTFOUND) |
| |
| def testDeleteProperty(self): |
| """Test that we can delete a property""" |
| node_name = '/subnode@1' |
| self.assertEquals(self.GetPropList(node_name), |
| ['compatible', 'reg', 'prop-int']) |
| node = self.fdt.path_offset('/%s' % node_name) |
| self.assertEquals(self.fdt.delprop(node, 'reg'), 0) |
| self.assertEquals(self.GetPropList(node_name), |
| ['compatible', 'prop-int']) |
| |
| def testHeader(self): |
| """Test that we can access the header values""" |
| self.assertEquals(self.fdt.magic(), 0xd00dfeed) |
| self.assertEquals(self.fdt.totalsize(), len(self.fdt._fdt)) |
| self.assertEquals(self.fdt.off_dt_struct(), 88) |
| self.assertEquals(self.fdt.off_dt_strings(), 652) |
| self.assertEquals(self.fdt.off_mem_rsvmap(), 40) |
| self.assertEquals(self.fdt.version(), 17) |
| self.assertEquals(self.fdt.last_comp_version(), 16) |
| self.assertEquals(self.fdt.boot_cpuid_phys(), 0) |
| self.assertEquals(self.fdt.size_dt_strings(), 105) |
| self.assertEquals(self.fdt.size_dt_struct(), 564) |
| |
| def testPack(self): |
| """Test that we can pack the tree after deleting something""" |
| orig_size = self.fdt.totalsize() |
| node = self.fdt.path_offset('/subnode@2', QUIET_NOTFOUND) |
| self.assertEquals(self.fdt.delprop(node, 'prop-int'), 0) |
| self.assertEquals(orig_size, self.fdt.totalsize()) |
| self.assertEquals(self.fdt.pack(), 0) |
| self.assertTrue(self.fdt.totalsize() < orig_size) |
| self.assertEquals(self.fdt.totalsize(), len(self.fdt.as_bytearray())) |
| |
| def testBadPropertyOffset(self): |
| """Test that bad property offsets are detected""" |
| with self.assertRaises(FdtException) as e: |
| self.fdt.get_property_by_offset(13) |
| self.assertEquals(e.exception.err, -libfdt.BADOFFSET) |
| with self.assertRaises(FdtException) as e: |
| self.fdt.first_property_offset(3) |
| self.assertEquals(e.exception.err, -libfdt.BADOFFSET) |
| with self.assertRaises(FdtException) as e: |
| self.fdt.next_property_offset(3) |
| self.assertEquals(e.exception.err, -libfdt.BADOFFSET) |
| |
| def testBadPathOffset(self): |
| """Test that bad path names are detected""" |
| with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADPATH)): |
| self.fdt.path_offset('not-present') |
| |
| def testQuietAll(self): |
| """Check that exceptions can be masked by QUIET_ALL""" |
| self.assertEquals(-libfdt.NOTFOUND, |
| self.fdt.path_offset('/missing', QUIET_ALL)) |
| self.assertEquals(-libfdt.BADOFFSET, |
| self.fdt.get_property_by_offset(13, QUIET_ALL)) |
| self.assertEquals(-libfdt.BADPATH, |
| self.fdt.path_offset('missing', QUIET_ALL)) |
| |
| def testIntegers(self): |
| """Check that integers can be passed and returned""" |
| self.assertEquals(0, libfdt.fdt_get_phandle(self.fdt._fdt, 0)) |
| node2 = self.fdt.path_offset('/subnode@2') |
| self.assertEquals(0x2000, libfdt.fdt_get_phandle(self.fdt._fdt, node2)) |
| |
| def testGetPhandle(self): |
| """Test for the get_phandle() method""" |
| self.assertEquals(0, self.fdt.get_phandle(0)) |
| node2 = self.fdt.path_offset('/subnode@2') |
| self.assertEquals(0x2000, self.fdt.get_phandle(node2)) |
| |
| def testGetAlias(self): |
| """Test for the get_alias() method""" |
| self.assertEquals("/subnode@1", self.fdt3.get_alias('s1')) |
| self.assertEquals("/subnode@1/subsubnode", self.fdt3.get_alias('ss1')) |
| self.assertEquals("/subnode@1/subsubnode/subsubsubnode", self.fdt3.get_alias('sss1')) |
| |
| def testParentOffset(self): |
| """Test for the parent_offset() method""" |
| self.assertEquals(-libfdt.NOTFOUND, |
| self.fdt.parent_offset(0, QUIET_NOTFOUND)) |
| with self.assertRaises(FdtException) as e: |
| self.fdt.parent_offset(0) |
| self.assertEquals(e.exception.err, -libfdt.NOTFOUND) |
| |
| node1 = self.fdt.path_offset('/subnode@2') |
| self.assertEquals(0, self.fdt.parent_offset(node1)) |
| node2 = self.fdt.path_offset('/subnode@2/subsubnode@0') |
| self.assertEquals(node1, self.fdt.parent_offset(node2)) |
| |
| def testNodeOffsetByPhandle(self): |
| """Test for the node_offset_by_phandle() method""" |
| self.assertEquals(-libfdt.NOTFOUND, |
| self.fdt.node_offset_by_phandle(1, QUIET_NOTFOUND)) |
| node1 = self.fdt.path_offset('/subnode@2') |
| self.assertEquals(node1, self.fdt.node_offset_by_phandle(0x2000)) |
| node2 = self.fdt.path_offset('/subnode@2/subsubnode@0') |
| self.assertEquals(node2, self.fdt.node_offset_by_phandle(0x2001)) |
| |
| def get_prop(self, name): |
| return self.fdt2.getprop(0, name) |
| |
| def testGetIntProperties(self): |
| """Test that we can access properties as integers""" |
| self.assertEquals(0xdeadbeef, self.get_prop("prop-hex32").as_uint32()) |
| self.assertEquals(123, self.get_prop("prop-uint32").as_uint32()) |
| self.assertEquals(-2, self.get_prop("prop-int32").as_int32()) |
| self.assertEquals(9223372036854775807, |
| self.get_prop("prop-uint64").as_uint64()) |
| self.assertEquals(-2, self.get_prop("prop-int64").as_int64()) |
| |
| def testReserveMap(self): |
| """Test that we can access the memory reserve map""" |
| self.assertEquals(2, self.fdt.num_mem_rsv()) |
| self.assertEquals([ 0xdeadbeef00000000, 0x100000], |
| self.fdt.get_mem_rsv(0)) |
| self.assertEquals([123456789, 0o10000], self.fdt.get_mem_rsv(1)) |
| |
| def testEmpty(self): |
| """Test that we can create an empty tree""" |
| self.assertEquals(-libfdt.NOSPACE, |
| Fdt.create_empty_tree(1, (libfdt.NOSPACE,))) |
| fdt = Fdt.create_empty_tree(128) |
| self.assertEquals(128, fdt.totalsize()) |
| |
| def testOpenInto(self): |
| """Test that we can resize a tree""" |
| fdt = Fdt.create_empty_tree(128) |
| self.assertEquals(128, fdt.totalsize()) |
| fdt.resize(256) |
| self.assertEquals(256, fdt.totalsize()) |
| fdt.pack() |
| self.assertTrue(fdt.totalsize() < 128) |
| |
| def testSetProp(self): |
| """Test that we can update and create properties""" |
| node = self.fdt.path_offset('/subnode@1') |
| self.fdt.setprop(node, 'compatible', TEST_BYTES_1) |
| self.assertEquals(TEST_BYTES_1, self.fdt.getprop(node, 'compatible')) |
| |
| # Check that this property is missing, and that we don't have space to |
| # add it |
| self.assertEquals(-libfdt.NOTFOUND, |
| self.fdt.getprop(node, 'missing', QUIET_NOTFOUND)) |
| self.assertEquals(-libfdt.NOSPACE, |
| self.fdt.setprop(node, 'missing', TEST_BYTES_1, |
| quiet=(libfdt.NOSPACE,))) |
| |
| # Expand the device tree so we now have room |
| self.fdt.resize(self.fdt.totalsize() + 50) |
| self.fdt.setprop(node, 'missing', TEST_BYTES_1) |
| self.assertEquals(TEST_BYTES_1, self.fdt.getprop(node, 'missing')) |
| |
| def testSetPropU32(self): |
| """Test that we can update and create integer properties""" |
| node = 0 |
| prop = 'prop-int' |
| self.fdt.setprop_u32(node, prop, TEST_VALUE_1) |
| self.assertEquals(struct.pack('>I', TEST_VALUE_1), |
| self.fdt.getprop(node, prop)) |
| |
| def testSetPropU64(self): |
| """Test that we can update and create integer properties""" |
| node = 0 |
| prop = 'prop-int64' |
| self.fdt.setprop_u64(node, prop, TEST_VALUE64_1) |
| self.assertEquals(struct.pack('>Q', TEST_VALUE64_1), |
| self.fdt.getprop(node, prop)) |
| |
| def testSetPropStr(self): |
| """Test that we can set a property to a particular string""" |
| node = 0 |
| prop = 'prop-str' |
| self.assertEquals(TEST_STRING_1, self.fdt.getprop(node, prop).as_str()) |
| self.fdt.setprop_str(node, prop, TEST_STRING_2) |
| self.assertEquals(TEST_STRING_2, self.fdt.getprop(node, prop).as_str()) |
| with self.assertRaises(ValueError) as e: |
| self.fdt.getprop(node, 'prop-int').as_str() |
| self.assertIn('lacks nul termination', str(e.exception)) |
| |
| node2 = self.fdt.path_offset('/subnode@1/subsubnode') |
| with self.assertRaises(ValueError) as e: |
| self.fdt.getprop(node2, 'compatible').as_str() |
| self.assertIn('embedded nul', str(e.exception)) |
| |
| # Expand the device tree so we now have room |
| self.fdt.resize(self.fdt.totalsize() + 50) |
| prop = 'prop-unicode' |
| self.fdt.setprop_str(node, prop, TEST_STRING_3) |
| self.assertEquals(TEST_STRING_3, |
| self.fdt.getprop(node, prop).as_str()) |
| |
| def testSetName(self): |
| """Test that we can update a node name""" |
| node = self.fdt.path_offset('/subnode@1') |
| old_val = self.fdt.get_name(node) |
| self.fdt.set_name(node, 'test') |
| self.assertEquals('test', self.fdt.get_name(node)) |
| |
| with self.assertRaises(ValueError) as e: |
| self.fdt.set_name(node, 'some\0name') |
| self.assertIn('embedded nul', str(e.exception)) |
| |
| with self.assertRaises(ValueError) as e: |
| self.fdt.set_name(node, 'name\0') |
| self.assertIn('embedded nul', str(e.exception)) |
| |
| def testAddDeleteNodes(self): |
| """Test that we can add and delete nodes""" |
| node_name = '/subnode@1' |
| self.assertEquals(self.GetSubnodes(node_name), ['subsubnode', 'ss1']) |
| node = self.fdt.path_offset('%s/subsubnode' % node_name) |
| self.assertEquals(self.fdt.del_node(node, 'subsubnode'), 0) |
| self.assertEquals(self.GetSubnodes(node_name), ['ss1']) |
| |
| node = self.fdt.path_offset(node_name) |
| offset = self.fdt.add_subnode(node, 'more') |
| self.assertTrue(offset > 0) |
| self.assertEquals(self.GetSubnodes(node_name), ['more', 'ss1']) |
| |
| |
| class PyLibfdtSwTests(unittest.TestCase): |
| """Test class for pylibfdt sequential-write DT creation |
| """ |
| def assertOk(self, err_code): |
| self.assertEquals(0, err_code) |
| |
| def testCreate(self): |
| # First check the minimum size and also the FdtSw() constructor |
| with self.assertRaisesRegexp(FdtException, get_err(libfdt.NOSPACE)): |
| self.assertEquals(-libfdt.NOSPACE, FdtSw(3)) |
| |
| sw = FdtSw() |
| sw.add_reservemap_entry(TEST_ADDR_1, TEST_SIZE_1) |
| sw.add_reservemap_entry(TEST_ADDR_2, TEST_SIZE_2) |
| sw.finish_reservemap() |
| |
| sw.begin_node('') |
| sw.property_string('compatible', 'test_tree1') |
| sw.property_u32('prop-int', TEST_VALUE_1) |
| |
| sw.property_u32('prop-int', TEST_VALUE_1) |
| sw.property_u64('prop-int64', TEST_VALUE64_1) |
| sw.property_string('prop-str', TEST_STRING_1) |
| sw.property_u32('#address-cells', 1) |
| sw.property_u32('#size-cells', 0) |
| |
| sw.begin_node('subnode@1') |
| sw.property_string('compatible', 'subnode1') |
| sw.property_u32('reg', 1) |
| sw.property_cell('prop-int', TEST_VALUE_1) |
| sw.begin_node('subsubnode') |
| sw.property('compatible', 'subsubnode1\0subsubnode') |
| sw.property_cell('prop-int', TEST_VALUE_1) |
| sw.end_node() |
| sw.begin_node('ss1') |
| sw.end_node() |
| sw.end_node() |
| |
| for i in range(2, 11): |
| with sw.add_node('subnode@%d' % i): |
| sw.property_u32('reg', 2) |
| sw.property_cell('linux,phandle', PHANDLE_1) |
| sw.property_cell('prop-int', TEST_VALUE_2) |
| sw.property_u32('#address-cells', 1) |
| sw.property_u32('#size-cells', 0) |
| with sw.add_node('subsubnode@0'): |
| sw.property_u32('reg', 0) |
| sw.property_cell('phandle', PHANDLE_2) |
| sw.property('compatible', 'subsubnode2\0subsubnode') |
| sw.property_cell('prop-int', TEST_VALUE_2) |
| with sw.add_node('ss2'): |
| pass |
| sw.end_node() |
| |
| fdt = sw.as_fdt() |
| self.assertEqual(2, fdt.num_mem_rsv()) |
| self.assertEqual([TEST_ADDR_1, TEST_SIZE_1], fdt.get_mem_rsv(0)) |
| |
| # Make sure we can add a few more things |
| with sw.add_node('another'): |
| sw.property_u32('reg', 3) |
| |
| # Make sure we can read from the tree too |
| node = sw.path_offset('/subnode@1') |
| self.assertEqual(b'subnode1\0', sw.getprop(node, 'compatible')) |
| |
| # Make sure we did at least two resizes |
| self.assertTrue(len(fdt.as_bytearray()) > FdtSw.INC_SIZE * 2) |
| |
| |
| class PyLibfdtRoTests(unittest.TestCase): |
| """Test class for read-only pylibfdt access functions |
| |
| This just tests a few simple cases. Most of the tests are in |
| PyLibfdtBasicTests. |
| |
| Properties: |
| fdt: Device tree file used for testing |
| """ |
| |
| def setUp(self): |
| """Read in the device tree we use for testing""" |
| self.fdt = libfdt.FdtRo(open('test_tree1.dtb', mode='rb').read()) |
| |
| def testAccess(self): |
| """Basic sanity check for the FdtRo class""" |
| node = self.fdt.path_offset('/subnode@1') |
| self.assertEqual(b'subnode1\0', |
| self.fdt.getprop(node, 'compatible')) |
| node = self.fdt.first_subnode(node) |
| self.assertEqual(b'this is a placeholder string\0string2\0', |
| self.fdt.getprop(node, 'placeholder')) |
| |
| |
| if __name__ == "__main__": |
| unittest.main() |
