1 files changed, 197 insertions, 43 deletions

diff --git a/libfdt/fdt_rw.c b/libfdt/fdt_rw.c
index aaafc53..dfe5628 100644
--- a/libfdt/fdt_rw.c
+++ b/libfdt/fdt_rw.c
@@ -2,19 +2,51 @@
  * 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.
+ * libfdt is dual licensed: you can use it either under the terms of
+ * the GPL, or the BSD license, at your option.
  *
- * 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.
+ *  a) This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of the
+ *     License, or (at your option) any later version.
  *
- * 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
+ *     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 General Public License for more details.
+ *
+ *     You should have received a copy of the GNU 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
+ *
+ * Alternatively,
+ *
+ *  b) Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *     2. Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include "libfdt_env.h"
 
@@ -23,25 +55,32 @@
 
 #include "libfdt_internal.h"
 
+static int _blocks_misordered(const void *fdt,
+			      int mem_rsv_size, int struct_size)
+{
+	return (fdt_off_mem_rsvmap(fdt) < ALIGN(sizeof(struct fdt_header), 8))
+		|| (fdt_off_dt_struct(fdt) <
+		    (fdt_off_mem_rsvmap(fdt) + mem_rsv_size))
+		|| (fdt_off_dt_strings(fdt) <
+		    (fdt_off_dt_struct(fdt) + struct_size))
+		|| (fdt_totalsize(fdt) <
+		    (fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt)));
+}
+
 static int rw_check_header(void *fdt)
 {
 	int err;
 
 	if ((err = fdt_check_header(fdt)))
 		return err;
-	if (fdt_version(fdt) < 0x11)
+	if (fdt_version(fdt) < 17)
 		return -FDT_ERR_BADVERSION;
-	if (fdt_off_mem_rsvmap(fdt) < ALIGN(sizeof(struct fdt_header), 8))
-		return -FDT_ERR_BADLAYOUT;
-	if (fdt_off_dt_struct(fdt) <
-	    (fdt_off_mem_rsvmap(fdt) + sizeof(struct fdt_reserve_entry)))
-		return -FDT_ERR_BADLAYOUT;
-	if (fdt_off_dt_strings(fdt) <
-	    (fdt_off_dt_struct(fdt) + fdt_size_dt_struct(fdt)))
-		return -FDT_ERR_BADLAYOUT;
-	if (fdt_totalsize(fdt) <
-	    (fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt)))
+	if (_blocks_misordered(fdt, sizeof(struct fdt_reserve_entry),
+			       fdt_size_dt_struct(fdt)))
 		return -FDT_ERR_BADLAYOUT;
+	if (fdt_version(fdt) > 17)
+		fdt_set_version(fdt, 17);
+
 	return 0;
 }
 
@@ -69,6 +108,19 @@ static int _blob_splice(void *fdt, void *p, int oldlen, int newlen)
 	return 0;
 }
 
+static int _blob_splice_mem_rsv(void *fdt, struct fdt_reserve_entry *p,
+				int oldn, int newn)
+{
+	int delta = (newn - oldn) * sizeof(*p);
+	int err;
+	err = _blob_splice(fdt, p, oldn * sizeof(*p), newn * sizeof(*p));
+	if (err)
+		return err;
+	fdt_set_off_dt_struct(fdt, fdt_off_dt_struct(fdt) + delta);
+	fdt_set_off_dt_strings(fdt, fdt_off_dt_strings(fdt) + delta);
+	return 0;
+}
+
 static int _blob_splice_struct(void *fdt, void *p,
 			       int oldlen, int newlen)
 {
@@ -78,8 +130,8 @@ static int _blob_splice_struct(void *fdt, void *p,
 	if ((err = _blob_splice(fdt, p, oldlen, newlen)))
 		return err;
 
-	fdt_set_header(fdt, size_dt_struct, fdt_size_dt_struct(fdt) + delta);
-	fdt_set_header(fdt, off_dt_strings, fdt_off_dt_strings(fdt) + delta);
+	fdt_set_size_dt_struct(fdt, fdt_size_dt_struct(fdt) + delta);
+	fdt_set_off_dt_strings(fdt, fdt_off_dt_strings(fdt) + delta);
 	return 0;
 }
 
@@ -91,7 +143,7 @@ static int _blob_splice_string(void *fdt, int newlen)
 	if ((err = _blob_splice(fdt, p, 0, newlen)))
 		return err;
 
-	fdt_set_header(fdt, size_dt_strings, fdt_size_dt_strings(fdt) + newlen);
+	fdt_set_size_dt_strings(fdt, fdt_size_dt_strings(fdt) + newlen);
 	return 0;
 }
 
@@ -117,13 +169,47 @@ static int _find_add_string(void *fdt, const char *s)
 	return (new - strtab);
 }
 
+int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size)
+{
+	struct fdt_reserve_entry *re;
+	int err;
+
+	if ((err = rw_check_header(fdt)))
+		return err;
+
+	re = _fdt_mem_rsv_w(fdt, fdt_num_mem_rsv(fdt));
+	err = _blob_splice_mem_rsv(fdt, re, 0, 1);
+	if (err)
+		return err;
+
+	re->address = cpu_to_fdt64(address);
+	re->size = cpu_to_fdt64(size);
+	return 0;
+}
+
+int fdt_del_mem_rsv(void *fdt, int n)
+{
+	struct fdt_reserve_entry *re = _fdt_mem_rsv_w(fdt, n);
+	int err;
+
+	if ((err = rw_check_header(fdt)))
+		return err;
+	if (n >= fdt_num_mem_rsv(fdt))
+		return -FDT_ERR_NOTFOUND;
+
+	err = _blob_splice_mem_rsv(fdt, re, 1, 0);
+	if (err)
+		return err;
+	return 0;
+}
+
 static int _resize_property(void *fdt, int nodeoffset, const char *name, int len,
 			    struct fdt_property **prop)
 {
 	int oldlen;
 	int err;
 
-	*prop = fdt_get_property(fdt, nodeoffset, name, &oldlen);
+	*prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
 	if (! (*prop))
 		return oldlen;
 
@@ -145,7 +231,7 @@ static int _add_property(void *fdt, int nodeoffset, const char *name, int len,
 	int namestroff;
 	int err;
 
-	tag = fdt_next_tag(fdt, nodeoffset, &nextoffset, NULL);
+	tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
 	if (tag != FDT_BEGIN_NODE)
 		return -FDT_ERR_BADOFFSET;
 
@@ -153,7 +239,7 @@ static int _add_property(void *fdt, int nodeoffset, const char *name, int len,
 	if (namestroff < 0)
 		return namestroff;
 
-	*prop = _fdt_offset_ptr(fdt, nextoffset);
+	*prop = _fdt_offset_ptr_w(fdt, nextoffset);
 	proplen = sizeof(**prop) + ALIGN(len, FDT_TAGSIZE);
 
 	err = _blob_splice_struct(fdt, *prop, 0, proplen);
@@ -192,7 +278,7 @@ int fdt_delprop(void *fdt, int nodeoffset, const char *name)
 
 	RW_CHECK_HEADER(fdt);
 
-	prop = fdt_get_property(fdt, nodeoffset, name, &len);
+	prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
 	if (! prop)
 		return len;
 
@@ -219,13 +305,13 @@ int fdt_add_subnode_namelen(void *fdt, int parentoffset,
 		return offset;
 
 	/* Try to place the new node after the parent's properties */
-	fdt_next_tag(fdt, parentoffset, &nextoffset, NULL); /* skip the BEGIN_NODE */
+	fdt_next_tag(fdt, parentoffset, &nextoffset); /* skip the BEGIN_NODE */
 	do {
 		offset = nextoffset;
-		tag = fdt_next_tag(fdt, offset, &nextoffset, NULL);
+		tag = fdt_next_tag(fdt, offset, &nextoffset);
 	} while (tag == FDT_PROP);
 
-	nh = _fdt_offset_ptr(fdt, offset);
+	nh = _fdt_offset_ptr_w(fdt, offset);
 	nodelen = sizeof(*nh) + ALIGN(namelen+1, FDT_TAGSIZE) + FDT_TAGSIZE;
 
 	err = _blob_splice_struct(fdt, nh, 0, nodelen);
@@ -250,44 +336,112 @@ int fdt_del_node(void *fdt, int nodeoffset)
 {
 	int endoffset;
 
+	RW_CHECK_HEADER(fdt);
+
 	endoffset = _fdt_node_end_offset(fdt, nodeoffset);
 	if (endoffset < 0)
 		return endoffset;
 
-	return _blob_splice_struct(fdt, _fdt_offset_ptr(fdt, nodeoffset),
+	return _blob_splice_struct(fdt, _fdt_offset_ptr_w(fdt, nodeoffset),
 				   endoffset - nodeoffset, 0);
 }
 
-int fdt_open_into(void *fdt, void *buf, int bufsize)
+static void _packblocks(const void *fdt, void *buf,
+		       int mem_rsv_size, int struct_size)
+{
+	int mem_rsv_off, struct_off, strings_off;
+
+	mem_rsv_off = ALIGN(sizeof(struct fdt_header), 8);
+	struct_off = mem_rsv_off + mem_rsv_size;
+	strings_off = struct_off + struct_size;
+
+	memmove(buf + mem_rsv_off, fdt + fdt_off_mem_rsvmap(fdt), mem_rsv_size);
+	fdt_set_off_mem_rsvmap(buf, mem_rsv_off);
+
+	memcpy(buf + struct_off, fdt + fdt_off_dt_struct(fdt), struct_size);
+	fdt_set_off_dt_struct(buf, struct_off);
+	fdt_set_size_dt_struct(buf, struct_size);
+
+	memcpy(buf + strings_off, fdt + fdt_off_dt_strings(fdt),
+	       fdt_size_dt_strings(fdt));
+	fdt_set_off_dt_strings(buf, strings_off);
+	fdt_set_size_dt_strings(buf, fdt_size_dt_strings(fdt));
+}
+
+int fdt_open_into(const void *fdt, void *buf, int bufsize)
 {
 	int err;
+	int mem_rsv_size, struct_size;
+	int newsize;
+	void *tmp;
 
-	err = fdt_move(fdt, buf, bufsize);
+	err = fdt_check_header(fdt);
 	if (err)
 		return err;
 
-	fdt = buf;
+	mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
+		* sizeof(struct fdt_reserve_entry);
 
-	fdt_set_header(fdt, totalsize, bufsize);
+	if (fdt_version(fdt) >= 17) {
+		struct_size = fdt_size_dt_struct(fdt);
+	} else {
+		struct_size = 0;
+		while (fdt_next_tag(fdt, struct_size, &struct_size) != FDT_END)
+			;
+	}
 
-	/* FIXME: re-order if necessary */
+	if (!_blocks_misordered(fdt, mem_rsv_size, struct_size)) {
+		/* no further work necessary */
+		err = fdt_move(fdt, buf, bufsize);
+		if (err)
+			return err;
+		fdt_set_version(buf, 17);
+		fdt_set_size_dt_struct(buf, struct_size);
+		fdt_set_totalsize(buf, bufsize);
+		return 0;
+	}
 
-	err = rw_check_header(fdt);
-	if (err)
-		return err;
+	/* Need to reorder */
+	newsize = ALIGN(sizeof(struct fdt_header), 8) + mem_rsv_size
+		+ struct_size + fdt_size_dt_strings(fdt);
+
+	if (bufsize < newsize)
+		return -FDT_ERR_NOSPACE;
+
+	if (((buf + newsize) <= fdt)
+	    || (buf >= (fdt + fdt_totalsize(fdt)))) {
+		tmp = buf;
+	} else {
+		tmp = (void *)fdt + fdt_totalsize(fdt);
+		if ((tmp + newsize) > (buf + bufsize))
+			return -FDT_ERR_NOSPACE;
+	}
+
+	_packblocks(fdt, tmp, mem_rsv_size, struct_size);
+	memmove(buf, tmp, newsize);
+
+	fdt_set_magic(buf, FDT_MAGIC);
+	fdt_set_totalsize(buf, bufsize);
+	fdt_set_version(buf, 17);
+	fdt_set_last_comp_version(buf, 16);
+	fdt_set_boot_cpuid_phys(buf, fdt_boot_cpuid_phys(fdt));
 
 	return 0;
 }
 
 int fdt_pack(void *fdt)
 {
+	int mem_rsv_size;
 	int err;
 
 	err = rw_check_header(fdt);
 	if (err)
 		return err;
 
-	/* FIXME: pack components */
-	fdt_set_header(fdt, totalsize, _blob_data_size(fdt));
+	mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
+		* sizeof(struct fdt_reserve_entry);
+	_packblocks(fdt, fdt, mem_rsv_size, fdt_size_dt_struct(fdt));
+	fdt_set_totalsize(fdt, _blob_data_size(fdt));
+
 	return 0;
 }