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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
* libfdt - Flat Device Tree manipulation
* Tests if two given dtbs are structurally equal (including order)
* Copyright (C) 2007 David Gibson, IBM Corporation.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
static int notequal; /* = 0 */
#define MISMATCH(fmt, ...) \
do { \
if (notequal) \
PASS(); \
else \
FAIL(fmt, ##__VA_ARGS__); \
} while (0)
#define MATCH() \
do { \
if (!notequal) \
PASS(); \
else \
FAIL("Trees match which shouldn't"); \
} while (0)
#define CHECK(code) \
{ \
err = (code); \
if (err) \
FAIL(#code ": %s", fdt_strerror(err)); \
}
static void compare_mem_rsv(const void *fdt1, const void *fdt2)
{
int i;
uint64_t addr1, size1, addr2, size2;
int err;
if (fdt_num_mem_rsv(fdt1) != fdt_num_mem_rsv(fdt2))
MISMATCH("Trees have different number of reserve entries");
for (i = 0; i < fdt_num_mem_rsv(fdt1); i++) {
CHECK(fdt_get_mem_rsv(fdt1, i, &addr1, &size1));
CHECK(fdt_get_mem_rsv(fdt2, i, &addr2, &size2));
if ((addr1 != addr2) || (size1 != size2))
MISMATCH("Mismatch in reserve entry %d: "
"(0x%llx, 0x%llx) != (0x%llx, 0x%llx)", i,
(unsigned long long)addr1,
(unsigned long long)size1,
(unsigned long long)addr2,
(unsigned long long)size2);
}
}
static void compare_structure(const void *fdt1, const void *fdt2)
{
int nextoffset1 = 0, nextoffset2 = 0;
int offset1, offset2;
uint32_t tag1, tag2;
const char *name1, *name2;
int err;
const struct fdt_property *prop1, *prop2;
int len1, len2;
while (1) {
do {
offset1 = nextoffset1;
tag1 = fdt_next_tag(fdt1, offset1, &nextoffset1);
} while (tag1 == FDT_NOP);
do {
offset2 = nextoffset2;
tag2 = fdt_next_tag(fdt2, offset2, &nextoffset2);
} while (tag2 == FDT_NOP);
if (tag1 != tag2)
MISMATCH("Tag mismatch (%d != %d) at (%d, %d)",
tag1, tag2, offset1, offset2);
switch (tag1) {
case FDT_BEGIN_NODE:
name1 = fdt_get_name(fdt1, offset1, &err);
if (!name1)
FAIL("fdt_get_name(fdt1, %d, ..): %s",
offset1, fdt_strerror(err));
name2 = fdt_get_name(fdt2, offset2, NULL);
if (!name2)
FAIL("fdt_get_name(fdt2, %d, ..): %s",
offset2, fdt_strerror(err));
if (!streq(name1, name2))
MISMATCH("Name mismatch (\"%s\" != \"%s\") at (%d, %d)",
name1, name2, offset1, offset2);
break;
case FDT_PROP:
prop1 = fdt_offset_ptr(fdt1, offset1, sizeof(*prop1));
if (!prop1)
FAIL("Could get fdt1 property at %d", offset1);
prop2 = fdt_offset_ptr(fdt2, offset2, sizeof(*prop2));
if (!prop2)
FAIL("Could get fdt2 property at %d", offset2);
name1 = fdt_string(fdt1, fdt32_to_cpu(prop1->nameoff));
name2 = fdt_string(fdt2, fdt32_to_cpu(prop2->nameoff));
if (!streq(name1, name2))
MISMATCH("Property name mismatch \"%s\" != \"%s\" "
"at (%d, %d)", name1, name2, offset1, offset2);
len1 = fdt32_to_cpu(prop1->len);
len2 = fdt32_to_cpu(prop2->len);
if (len1 != len2)
MISMATCH("Property length mismatch %u != %u "
"at (%d, %d)", len1, len2, offset1, offset2);
if (memcmp(prop1->data, prop2->data, len1) != 0)
MISMATCH("Property value mismatch at (%d, %d)",
offset1, offset2);
break;
case FDT_END:
return;
}
}
}
int main(int argc, char *argv[])
{
void *fdt1, *fdt2;
uint32_t cpuid1, cpuid2;
test_init(argc, argv);
if ((argc != 3)
&& ((argc != 4) || !streq(argv[1], "-n")))
CONFIG("Usage: %s [-n] <dtb file> <dtb file>", argv[0]);
if (argc == 4)
notequal = 1;
fdt1 = load_blob(argv[argc-2]);
fdt2 = load_blob(argv[argc-1]);
compare_mem_rsv(fdt1, fdt2);
compare_structure(fdt1, fdt2);
cpuid1 = fdt_boot_cpuid_phys(fdt1);
cpuid2 = fdt_boot_cpuid_phys(fdt2);
if (cpuid1 != cpuid2)
MISMATCH("boot_cpuid_phys mismatch 0x%x != 0x%x",
cpuid1, cpuid2);
MATCH();
}
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