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* libfdt - Flat Device Tree manipulation
* Testcase common utility functions
* Copyright (C) 2006 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
* 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
#define _GNU_SOURCE /* for strsignal() in glibc. FreeBSD has it either way */
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <limits.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
#include <libfdt.h>
#include "tests.h"
int verbose_test = 1;
char *test_name;
void __attribute__((weak)) cleanup(void)
static void sigint_handler(int signum, siginfo_t *si, void *uc)
fprintf(stderr, "%s: %s (pid=%d)\n", test_name,
strsignal(signum), getpid());
void test_init(int argc, char *argv[])
int err;
struct sigaction sa_int = {
.sa_sigaction = sigint_handler,
test_name = argv[0];
err = sigaction(SIGINT, &sa_int, NULL);
if (err)
FAIL("Can't install SIGINT handler");
if (getenv("QUIET_TEST"))
verbose_test = 0;
verbose_printf("Starting testcase \"%s\", pid %d\n",
test_name, getpid());
void check_mem_rsv(void *fdt, int n, uint64_t addr, uint64_t size)
int err;
uint64_t addr_v, size_v;
err = fdt_get_mem_rsv(fdt, n, &addr_v, &size_v);
if (err < 0)
FAIL("fdt_get_mem_rsv(%d): %s", n, fdt_strerror(err));
if ((addr_v != addr) || (size_v != size))
FAIL("fdt_get_mem_rsv() returned (0x%llx,0x%llx) "
"instead of (0x%llx,0x%llx)",
(unsigned long long)addr_v, (unsigned long long)size_v,
(unsigned long long)addr, (unsigned long long)size);
void check_property(void *fdt, int nodeoffset, const char *name,
int len, const void *val)
const struct fdt_property *prop;
int retlen;
uint32_t tag, nameoff, proplen;
const char *propname;
verbose_printf("Checking property \"%s\"...", name);
prop = fdt_get_property(fdt, nodeoffset, name, &retlen);
verbose_printf("pointer %p\n", prop);
if (! prop)
FAIL("Error retreiving \"%s\" pointer: %s", name,
tag = fdt32_to_cpu(prop->tag);
nameoff = fdt32_to_cpu(prop->nameoff);
proplen = fdt32_to_cpu(prop->len);
if (tag != FDT_PROP)
FAIL("Incorrect tag 0x%08x on property \"%s\"", tag, name);
propname = fdt_string(fdt, nameoff);
if (!propname || !streq(propname, name))
FAIL("Property name mismatch \"%s\" instead of \"%s\"",
propname, name);
if (proplen != retlen)
FAIL("Length retrieved for \"%s\" by fdt_get_property()"
" differs from stored length (%d != %d)",
name, retlen, proplen);
if (proplen != len)
FAIL("Size mismatch on property \"%s\": %d insead of %d",
name, proplen, len);
if (memcmp(val, prop->data, len) != 0)
FAIL("Data mismatch on property \"%s\"", name);
const void *check_getprop(void *fdt, int nodeoffset, const char *name,
int len, const void *val)
const void *propval;
int proplen;
propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
if (! propval)
FAIL("fdt_getprop(\"%s\"): %s", name, fdt_strerror(proplen));
if (proplen != len)
FAIL("Size mismatch on property \"%s\": %d insead of %d",
name, proplen, len);
if (memcmp(val, propval, len) != 0)
FAIL("Data mismatch on property \"%s\"", name);
return propval;
int nodename_eq(const char *s1, const char *s2)
int len = strlen(s2);
len = strlen(s2);
if (strncmp(s1, s2, len) != 0)
return 0;
if (s1[len] == '\0')
return 1;
else if (!memchr(s2, '@', len) && (s1[len] == '@'))
return 1;
return 0;
#define CHUNKSIZE 128
void *load_blob(const char *filename)
char *blob;
int ret = utilfdt_read_err(filename, &blob);
if (ret)
CONFIG("Couldn't open blob from \"%s\": %s", filename,
return blob;
void *load_blob_arg(int argc, char *argv[])
if (argc != 2)
CONFIG("Usage: %s <dtb file>", argv[0]);
return load_blob(argv[1]);
void save_blob(const char *filename, void *fdt)
int ret = utilfdt_write_err(filename, fdt);
if (ret)
CONFIG("Couldn't write blob to \"%s\": %s", filename,
void *open_blob_rw(void *blob)
int err;
void *buf = blob;
err = fdt_open_into(blob, buf, fdt_totalsize(blob));
if (err == -FDT_ERR_NOSPACE) {
/* Ran out of space converting to v17 */
int newsize = fdt_totalsize(blob) + 8;
buf = xmalloc(newsize);
err = fdt_open_into(blob, buf, newsize);
if (err)
FAIL("fdt_open_into(): %s", fdt_strerror(err));
return buf;