033089f290
Elements of size 8, 16, 32, and 64 bits are supported. The new
/bits/ syntax was selected so as to not pollute the reserved
keyword space with uint8/uint16/... type names.
With this patch the following property assignment:
property = /bits/ 16 <0x1234 0x5678 0x0 0xffff>;
is equivalent to:
property = <0x12345678 0x0000ffff>;
It is now also possible to directly specify a 64 bit literal in a
cell list, also known as an array using:
property = /bits/ 64 <0xdeadbeef00000000>;
It is an error to attempt to store a literal into an element that is
too small to hold the literal, and the compiler will generate an
error when it detects this. For instance:
property = /bits/ 8 <256>;
Will fail to compile. It is also an error to attempt to place a
reference in a non 32-bit element.
The documentation has been changed to reflect that the cell list
is now an array of elements that can be of sizes other than the
default 32-bit cell size.
The sized_cells test tests the creation and access of 8, 16, 32,
and 64-bit sized elements. It also tests that the creation of two
properties, one with 16 bit elements and one with 32 bit elements
result in the same property contents.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*
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* libfdt - Flat Device Tree manipulation
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* Testcase for variable sized cells in dtc
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* Copyright (C) 2006 David Gibson, IBM Corporation.
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* Copyright (C) 2011 The Chromium Authors. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <fdt.h>
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#include <libfdt.h>
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#include "tests.h"
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#include "testdata.h"
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static void check_compare_properties(void *fdt,
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char const *name_one,
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char const *name_two)
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{
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const void *propval;
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int proplen;
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propval = fdt_getprop(fdt, 0, name_one, &proplen);
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if (!propval)
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FAIL("fdt_getprop(\"%s\"): %s",
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name_one,
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fdt_strerror(proplen));
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check_getprop(fdt, 0, name_two, proplen, propval);
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}
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int main(int argc, char *argv[])
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{
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void *fdt;
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uint8_t expected_8[6] = {TEST_CHAR1,
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TEST_CHAR2,
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TEST_CHAR3,
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TEST_CHAR4,
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TEST_CHAR5,
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TEST_VALUE_1 >> 24};
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uint16_t expected_16[6];
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uint32_t expected_32[6];
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uint64_t expected_64[6];
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int i;
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for (i = 0; i < 5; ++i) {
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expected_16[i] = cpu_to_fdt16(expected_8[i]);
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expected_32[i] = cpu_to_fdt32(expected_8[i]);
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expected_64[i] = cpu_to_fdt64(expected_8[i]);
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}
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expected_16[5] = cpu_to_fdt16(TEST_VALUE_1 >> 16);
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expected_32[5] = cpu_to_fdt32(TEST_VALUE_1);
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expected_64[5] = cpu_to_fdt64(TEST_ADDR_1);
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test_init(argc, argv);
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fdt = load_blob_arg(argc, argv);
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check_getprop(fdt, 0, "cells-8b", sizeof(expected_8), expected_8);
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check_getprop(fdt, 0, "cells-16b", sizeof(expected_16), expected_16);
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check_getprop(fdt, 0, "cells-32b", sizeof(expected_32), expected_32);
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check_getprop(fdt, 0, "cells-64b", sizeof(expected_64), expected_64);
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check_compare_properties(fdt, "cells-one-16b", "cells-one-32b");
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PASS();
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}
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