143 lines
3.0 KiB
C
143 lines
3.0 KiB
C
/*
|
|
* libfdt - Flat Device Tree manipulation
|
|
* 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
|
|
* 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 "config.h"
|
|
#if CONFIG_OF_LIBFDT
|
|
|
|
#include "libfdt_env.h"
|
|
|
|
#include <fdt.h>
|
|
#include <libfdt.h>
|
|
|
|
#include "libfdt_internal.h"
|
|
|
|
int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
|
|
const void *val, int len)
|
|
{
|
|
void *propval;
|
|
int proplen;
|
|
|
|
propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
|
|
if (! propval)
|
|
return proplen;
|
|
|
|
if (proplen != len)
|
|
return -FDT_ERR_NOSPACE;
|
|
|
|
memcpy(propval, val, len);
|
|
return 0;
|
|
}
|
|
|
|
static void nop_region(void *start, int len)
|
|
{
|
|
uint32_t *p;
|
|
|
|
for (p = start; (void *)p < (start + len); p++)
|
|
*p = cpu_to_fdt32(FDT_NOP);
|
|
}
|
|
|
|
int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
|
|
{
|
|
struct fdt_property *prop;
|
|
int len;
|
|
|
|
prop = fdt_get_property(fdt, nodeoffset, name, &len);
|
|
if (! prop)
|
|
return len;
|
|
|
|
nop_region(prop, len + sizeof(*prop));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int _fdt_node_end_offset(void *fdt, int nodeoffset)
|
|
{
|
|
int level = 0;
|
|
uint32_t tag;
|
|
int offset, nextoffset;
|
|
|
|
tag = fdt_next_tag(fdt, nodeoffset, &nextoffset, NULL);
|
|
if (tag != FDT_BEGIN_NODE)
|
|
return -FDT_ERR_BADOFFSET;
|
|
do {
|
|
offset = nextoffset;
|
|
tag = fdt_next_tag(fdt, offset, &nextoffset, NULL);
|
|
|
|
switch (tag) {
|
|
case FDT_END:
|
|
return offset;
|
|
|
|
case FDT_BEGIN_NODE:
|
|
level++;
|
|
break;
|
|
|
|
case FDT_END_NODE:
|
|
level--;
|
|
break;
|
|
|
|
case FDT_PROP:
|
|
case FDT_NOP:
|
|
break;
|
|
|
|
default:
|
|
return -FDT_ERR_BADSTRUCTURE;
|
|
}
|
|
} while (level >= 0);
|
|
|
|
return nextoffset;
|
|
}
|
|
|
|
int fdt_nop_node(void *fdt, int nodeoffset)
|
|
{
|
|
int endoffset;
|
|
|
|
endoffset = _fdt_node_end_offset(fdt, nodeoffset);
|
|
if (endoffset < 0)
|
|
return endoffset;
|
|
|
|
nop_region(fdt_offset_ptr(fdt, nodeoffset, 0), endoffset - nodeoffset);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Replace a reserve map entry in the nth slot.
|
|
*/
|
|
int fdt_replace_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size)
|
|
{
|
|
struct fdt_reserve_entry *re;
|
|
int used;
|
|
int total;
|
|
int err;
|
|
|
|
err = fdt_num_reservemap(fdt, &used, &total);
|
|
if (err != 0)
|
|
return err;
|
|
|
|
if (n >= total)
|
|
return -FDT_ERR_NOSPACE;
|
|
re = (struct fdt_reserve_entry *)
|
|
(fdt + fdt_off_mem_rsvmap(fdt) +
|
|
(n * sizeof(struct fdt_reserve_entry)));
|
|
re->address = cpu_to_fdt64(addr);
|
|
re->size = cpu_to_fdt64(size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_OF_LIBFDT */
|