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/*
* libfdt - Flat Device Tree manipulation
* Tests if two given dtbs are structurally equal (including order)
* Copyright (C) 2007 David Gibson, IBM Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <limits.h>
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
static int notequal; /* = 0 */
static int ignore_memrsv; /* = 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 int mem_rsv_cmp(const void *p1, const void *p2)
{
const struct fdt_reserve_entry *re1 = p1;
const struct fdt_reserve_entry *re2 = p2;
if (fdt64_to_cpu(re1->address) < fdt64_to_cpu(re2->address))
return -1;
else if (fdt64_to_cpu(re1->address) > fdt64_to_cpu(re2->address))
return 1;
if (fdt64_to_cpu(re1->size) < fdt64_to_cpu(re2->size))
return -1;
else if (fdt64_to_cpu(re1->size) > fdt64_to_cpu(re2->size))
return 1;
return 0;
}
static void compare_mem_rsv(void *fdt1, 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");
qsort((char *)fdt1 + fdt_off_mem_rsvmap(fdt1), fdt_num_mem_rsv(fdt1),
sizeof(struct fdt_reserve_entry), mem_rsv_cmp);
qsort((char *)fdt2 + fdt_off_mem_rsvmap(fdt2), fdt_num_mem_rsv(fdt2),
sizeof(struct fdt_reserve_entry), mem_rsv_cmp);
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_properties(const void *fdt1, int offset1,
const void *fdt2, int offset2)
{
int offset = offset1;
/* Check the properties */
for (offset = fdt_first_property_offset(fdt1, offset1);
offset >= 0;
offset = fdt_next_property_offset(fdt1, offset)) {
const char *name;
int len1, len2;
const void *data1, *data2;
int i;
data1 = fdt_getprop_by_offset(fdt1, offset, &name, &len1);
if (!data1)
FAIL("fdt_getprop_by_offset(): %s\n",
fdt_strerror(len1));
verbose_printf("Property '%s'\n", name);
data2 = fdt_getprop(fdt2, offset2, name, &len2);
if (!data2) {
if (len2 == -FDT_ERR_NOTFOUND)
MISMATCH("Property '%s' missing\n", name);
else
FAIL("fdt_get_property(): %s\n",
fdt_strerror(len2));
}
verbose_printf("len1=%d data1=", len1);
for (i = 0; i < len1; i++)
verbose_printf(" %02x", ((const char *)data1)[i]);
verbose_printf("\nlen2=%d data2=", len2);
for (i = 0; i < len1; i++)
verbose_printf(" %02x", ((const char *)data2)[i]);
verbose_printf("\n");
if (len1 != len2)
MISMATCH("Property '%s' mismatched length %d vs. %d\n",
name, len1, len2);
else if (memcmp(data1, data2, len1) != 0)
MISMATCH("Property '%s' mismatched value\n", name);
}
}
static void compare_node(const void *fdt1, int offset1,
const void *fdt2, int offset2);
static void compare_subnodes(const void *fdt1, int offset1,
const void *fdt2, int offset2,
int recurse)
{
int coffset1, coffset2, depth;
for (depth = 0, coffset1 = offset1;
(coffset1 >= 0) && (depth >= 0);
coffset1 = fdt_next_node(fdt1, coffset1, &depth))
if (depth == 1) {
const char *name = fdt_get_name(fdt1, coffset1, NULL);
verbose_printf("Subnode %s\n", name);
coffset2 = fdt_subnode_offset(fdt2, offset2, name);
if (coffset2 == -FDT_ERR_NOTFOUND)
MISMATCH("Subnode %s missing\n", name);
else if (coffset2 < 0)
FAIL("fdt_subnode_offset(): %s\n",
fdt_strerror(coffset2));
if (recurse)
compare_node(fdt1, coffset1, fdt2, coffset2);
}
}
static void compare_node(const void *fdt1, int offset1,
const void *fdt2, int offset2)
{
int err;
char path1[PATH_MAX], path2[PATH_MAX];
CHECK(fdt_get_path(fdt1, offset1, path1, sizeof(path1)));
CHECK(fdt_get_path(fdt2, offset2, path2, sizeof(path2)));
if (!streq(path1, path2))
TEST_BUG("Path mismatch %s vs. %s\n", path1, path2);
verbose_printf("Checking %s\n", path1);
compare_properties(fdt1, offset1, fdt2, offset2);
compare_properties(fdt2, offset2, fdt1, offset1);
compare_subnodes(fdt1, offset1, fdt2, offset2, 1);
compare_subnodes(fdt2, offset2, fdt1, offset1, 0);
}
static void badargs(char **argv)
{
CONFIG("Usage: %s [-n] [-m] <dtb file> <dtb file>", argv[0]);
}
int main(int argc, char *argv[])
{
void *fdt1, *fdt2;
uint32_t cpuid1, cpuid2;
char **args;
int argsleft;
test_init(argc, argv);
args = &argv[1];
argsleft = argc - 1;
while (argsleft > 2) {
if (streq(args[0], "-n"))
notequal = 1;
else if (streq(args[0], "-m"))
ignore_memrsv = 1;
else
badargs(argv);
args++;
argsleft--;
}
if (argsleft != 2)
badargs(argv);
fdt1 = load_blob(args[0]);
fdt2 = load_blob(args[1]);
if (!ignore_memrsv)
compare_mem_rsv(fdt1, fdt2);
compare_node(fdt1, 0, fdt2, 0);
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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