// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
/*
* libfdt - Flat Device Tree manipulation
* Copyright (C) 2006 David Gibson, IBM Corporation.
*/
#include "libfdt_env.h"
#include <fdt.h>
#include <libfdt.h>
#include "libfdt_internal.h"
static int fdt_nodename_eq_(const void *fdt, int offset,
const char *s, int len)
{
int olen;
const char *p = fdt_get_name(fdt, offset, &olen);
if (!p || olen < len)
/* short match */
return 0;
if (memcmp(p, s, len) != 0)
return 0;
if (p[len] == '\0')
return 1;
else if (!memchr(s, '@', len) && (p[len] == '@'))
return 1;
else
return 0;
}
const char *fdt_get_string(const void *fdt, int stroffset, int *lenp)
{
int32_t totalsize;
uint32_t absoffset;
size_t len;
int err;
const char *s, *n;
if (can_assume(VALID_INPUT)) {
s = (const char *)fdt + fdt_off_dt_strings(fdt) + stroffset;
if (lenp)
*lenp = strlen(s);
return s;
}
totalsize = fdt_ro_probe_(fdt);
err = totalsize;
if (totalsize < 0)
goto fail;
err = -FDT_ERR_BADOFFSET;
absoffset = stroffset + fdt_off_dt_strings(fdt);
if (absoffset >= totalsize)
goto fail;
len = totalsize - absoffset;
if (fdt_magic(fdt) == FDT_MAGIC) {
if (stroffset < 0)
goto fail;
if (can_assume(LATEST) || fdt_version(fdt) >= 17) {
if (stroffset >= fdt_size_dt_strings(fdt))
goto fail;
if ((fdt_size_dt_strings(fdt) - stroffset) < len)
len = fdt_size_dt_strings(fdt) - stroffset;
}
} else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
if ((stroffset >= 0)
|| (stroffset < -fdt_size_dt_strings(fdt)))
goto fail;
if ((-stroffset) < len)
len = -stroffset;
} else {
err = -FDT_ERR_INTERNAL;
goto fail;
}
s = (const char *)fdt + absoffset;
n = memchr(s, '\0', len);
if (!n) {
/* missing terminating NULL */
err = -FDT_ERR_TRUNCATED;
goto fail;
}
if (lenp)
*lenp = n - s;
return s;
fail:
if (lenp)
*lenp = err;
return NULL;
}
const char *fdt_string(const void *fdt, int stroffset)
{
return fdt_get_string(fdt, stroffset, NULL);
}
static int fdt_string_eq_(const void *fdt, int stroffset,
const char *s, int len)
{
int slen;
const char *p = fdt_get_string(fdt, stroffset, &slen);
return p && (slen == len) && (memcmp(p, s, len) == 0);
}
int fdt_find_max_phandle(const void *fdt, uint32_t *phandle)
{
uint32_t max = 0;
int offset = -1;
while (true) {
uint32_t value;
offset = fdt_next_node(fdt, offset, NULL);
if (offset < 0) {
if (offset == -FDT_ERR_NOTFOUND)
break;
return offset;
}
value = fdt_get_phandle(fdt, offset);
if (value > max)
max = value;
}
if (phandle)
*phandle = max;
return 0;
}
int fdt_generate_phandle(const void *fdt, uint32_t *phandle)
{
uint32_t max;
int err;
err = fdt_find_max_phandle(fdt, &max);
if (err < 0)
return err;
if (max == FDT_MAX_PHANDLE)
return -FDT_ERR_NOPHANDLES;
if (phandle)
*phandle = max + 1;
return 0;
}
static const struct fdt_reserve_entry *fdt_mem_rsv(const