1 files changed, 447 insertions, 0 deletions

diff --git a/arch/powerpc/boot/libfdt/fdt_rw.c b/arch/powerpc/boot/libfdt/fdt_rw.c
new file mode 100644
index 000000000000..6673f8ec962a
--- /dev/null
+++ b/arch/powerpc/boot/libfdt/fdt_rw.c
@@ -0,0 +1,447 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ * libfdt is dual licensed: you can use it either under the terms of
+ * the GPL, or the BSD license, at your option.
+ *
+ *  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.
+ *
+ *     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"
+
+#include <fdt.h>
+#include <libfdt.h>
+
+#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) < 17)
+                return -FDT_ERR_BADVERSION;
+        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;
+}
+
+#define RW_CHECK_HEADER(fdt) \
+        { \
+                int err; \
+                if ((err = rw_check_header(fdt)) != 0) \
+                        return err; \
+        }
+
+static inline int _blob_data_size(void *fdt)
+{
+        return fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt);
+}
+
+static int _blob_splice(void *fdt, void *p, int oldlen, int newlen)
+{
+        void *end = fdt + _blob_data_size(fdt);
+
+        if (((p + oldlen) < p) || ((p + oldlen) > end))
+                return -FDT_ERR_BADOFFSET;
+        if ((end - oldlen + newlen) > (fdt + fdt_totalsize(fdt)))
+                return -FDT_ERR_NOSPACE;
+        memmove(p + newlen, p + oldlen, end - p - oldlen);
+        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)
+{
+        int delta = newlen - oldlen;
+        int err;
+
+        if ((err = _blob_splice(fdt, p, oldlen, newlen)))
+                return err;
+
+        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;
+}
+
+static int _blob_splice_string(void *fdt, int newlen)
+{
+        void *p = fdt + fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt);
+        int err;
+
+        if ((err = _blob_splice(fdt, p, 0, newlen)))
+                return err;
+
+        fdt_set_size_dt_strings(fdt, fdt_size_dt_strings(fdt) + newlen);
+        return 0;
+}
+
+static int _find_add_string(void *fdt, const char *s)
+{
+        char *strtab = (char *)fdt + fdt_off_dt_strings(fdt);
+        const char *p;
+        char *new;
+        int len = strlen(s) + 1;
+        int err;
+
+        p = _fdt_find_string(strtab, fdt_size_dt_strings(fdt), s);
+        if (p)
+                /* found it */
+                return (p - strtab);
+
+        new = strtab + fdt_size_dt_strings(fdt);
+        err = _blob_splice_string(fdt, len);
+        if (err)
+                return err;
+
+        memcpy(new, s, len);
+        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_w(fdt, nodeoffset, name, &oldlen);
+        if (! (*prop))
+                return oldlen;
+
+        if ((err = _blob_splice_struct(fdt, (*prop)->data,
+                                       ALIGN(oldlen, FDT_TAGSIZE),
+                                       ALIGN(len, FDT_TAGSIZE))))
+                return err;
+
+        (*prop)->len = cpu_to_fdt32(len);
+        return 0;
+}
+
+static int _add_property(void *fdt, int nodeoffset, const char *name, int len,
+                         struct fdt_property **prop)
+{
+        uint32_t tag;
+        int proplen;
+        int nextoffset;
+        int namestroff;
+        int err;
+
+        tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
+        if (tag != FDT_BEGIN_NODE)
+                return -FDT_ERR_BADOFFSET;
+
+        namestroff = _find_add_string(fdt, name);
+        if (namestroff < 0)
+                return namestroff;
+
+        *prop = _fdt_offset_ptr_w(fdt, nextoffset);
+        proplen = sizeof(**prop) + ALIGN(len, FDT_TAGSIZE);
+
+        err = _blob_splice_struct(fdt, *prop, 0, proplen);
+        if (err)
+                return err;
+
+        (*prop)->tag = cpu_to_fdt32(FDT_PROP);
+        (*prop)->nameoff = cpu_to_fdt32(namestroff);
+        (*prop)->len = cpu_to_fdt32(len);
+        return 0;
+}
+
+int fdt_setprop(void *fdt, int nodeoffset, const char *name,
+                const void *val, int len)
+{
+        struct fdt_property *prop;
+        int err;
+
+        if ((err = rw_check_header(fdt)))
+                return err;
+
+        err = _resize_property(fdt, nodeoffset, name, len, &prop);
+        if (err == -FDT_ERR_NOTFOUND)
+                err = _add_property(fdt, nodeoffset, name, len, &prop);
+        if (err)
+                return err;
+
+        memcpy(prop->data, val, len);
+        return 0;
+}
+
+int fdt_delprop(void *fdt, int nodeoffset, const char *name)
+{
+        struct fdt_property *prop;
+        int len, proplen;
+
+        RW_CHECK_HEADER(fdt);
+
+        prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
+        if (! prop)
+                return len;
+
+        proplen = sizeof(*prop) + ALIGN(len, FDT_TAGSIZE);
+        return _blob_splice_struct(fdt, prop, proplen, 0);
+}
+
+int fdt_add_subnode_namelen(void *fdt, int parentoffset,
+                            const char *name, int namelen)
+{
+        struct fdt_node_header *nh;
+        int offset, nextoffset;
+        int nodelen;
+        int err;
+        uint32_t tag;
+        uint32_t *endtag;
+
+        RW_CHECK_HEADER(fdt);
+
+        offset = fdt_subnode_offset_namelen(fdt, parentoffset, name, namelen);
+        if (offset >= 0)
+                return -FDT_ERR_EXISTS;
+        else if (offset != -FDT_ERR_NOTFOUND)
+                return offset;
+
+        /* Try to place the new node after the parent's properties */
+        fdt_next_tag(fdt, parentoffset, &nextoffset); /* skip the BEGIN_NODE */
+        do {
+                offset = nextoffset;
+                tag = fdt_next_tag(fdt, offset, &nextoffset);
+        } while (tag == FDT_PROP);
+
+        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);
+        if (err)
+                return err;
+
+        nh->tag = cpu_to_fdt32(FDT_BEGIN_NODE);
+        memset(nh->name, 0, ALIGN(namelen+1, FDT_TAGSIZE));
+        memcpy(nh->name, name, namelen);
+        endtag = (uint32_t *)((void *)nh + nodelen - FDT_TAGSIZE);
+        *endtag = cpu_to_fdt32(FDT_END_NODE);
+
+        return offset;
+}
+
+int fdt_add_subnode(void *fdt, int parentoffset, const char *name)
+{
+        return fdt_add_subnode_namelen(fdt, parentoffset, name, strlen(name));
+}
+
+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_w(fdt, nodeoffset),
+                                   endoffset - nodeoffset, 0);
+}
+
+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);
+
+        memmove(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);
+
+        memmove(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_check_header(fdt);
+        if (err)
+                return err;
+
+        mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
+                * sizeof(struct fdt_reserve_entry);
+
+        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)
+                        ;
+        }
+
+        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;
+        }
+
+        /* 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;
+
+        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;
+}