EmbeddedPkg: Apply uncrustify changes

[mirror_edk2.git] / EmbeddedPkg / Library / FdtLib / fdt_sw.c

/*\r
 * libfdt - Flat Device Tree manipulation\r
 * Copyright (C) 2006 David Gibson, IBM Corporation.\r
 *\r
 * libfdt is dual licensed: you can use it either under the terms of\r
 * the GPL, or the BSD license, at your option.\r
 *\r
 *  a) This library is free software; you can redistribute it and/or\r
 *     modify it under the terms of the GNU General Public License as\r
 *     published by the Free Software Foundation; either version 2 of the\r
 *     License, or (at your option) any later version.\r
 *\r
 *     This library is distributed in the hope that it will be useful,\r
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of\r
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
 *     GNU General Public License for more details.\r
 *\r
 *     You should have received a copy of the GNU General Public\r
 *     License along with this library; if not, write to the Free\r
 *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,\r
 *     MA 02110-1301 USA\r
 *\r
 * Alternatively,\r
 *\r
 *  b) Redistribution and use in source and binary forms, with or\r
 *     without modification, are permitted provided that the following\r
 *     conditions are met:\r
 *\r
 *     1. Redistributions of source code must retain the above\r
 *        copyright notice, this list of conditions and the following\r
 *        disclaimer.\r
 *     2. Redistributions in binary form must reproduce the above\r
 *        copyright notice, this list of conditions and the following\r
 *        disclaimer in the documentation and/or other materials\r
 *        provided with the distribution.\r
 *\r
 *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND\r
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,\r
 *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\r
 *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r
 *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR\r
 *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\r
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\r
 *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r
 *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR\r
 *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,\r
 *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
 */\r
#include "libfdt_env.h"\r
\r
#include <fdt.h>\r
#include <libfdt.h>\r
\r
#include "libfdt_internal.h"\r
\r
static int\r
_fdt_sw_check_header (\r
  void  *fdt\r
  )\r
{\r
  if (fdt_magic (fdt) != FDT_SW_MAGIC) {\r
    return -FDT_ERR_BADMAGIC;\r
  }\r
\r
  /* FIXME: should check more details about the header state */\r
  return 0;\r
}\r
\r
#define FDT_SW_CHECK_HEADER(fdt) \\r
        { \\r
                int err; \\r
                if ((err = _fdt_sw_check_header(fdt)) != 0) \\r
                        return err; \\r
        }\r
\r
static void *\r
_fdt_grab_space (\r
  void    *fdt,\r
  size_t  len\r
  )\r
{\r
  int  offset = fdt_size_dt_struct (fdt);\r
  int  spaceleft;\r
\r
  spaceleft = fdt_totalsize (fdt) - fdt_off_dt_struct (fdt)\r
              - fdt_size_dt_strings (fdt);\r
\r
  if ((offset + len < offset) || (offset + len > spaceleft)) {\r
    return NULL;\r
  }\r
\r
  fdt_set_size_dt_struct (fdt, offset + len);\r
  return _fdt_offset_ptr_w (fdt, offset);\r
}\r
\r
int\r
fdt_create (\r
  void  *buf,\r
  int   bufsize\r
  )\r
{\r
  void  *fdt = buf;\r
\r
  if (bufsize < sizeof (struct fdt_header)) {\r
    return -FDT_ERR_NOSPACE;\r
  }\r
\r
  memset (buf, 0, bufsize);\r
\r
  fdt_set_magic (fdt, FDT_SW_MAGIC);\r
  fdt_set_version (fdt, FDT_LAST_SUPPORTED_VERSION);\r
  fdt_set_last_comp_version (fdt, FDT_FIRST_SUPPORTED_VERSION);\r
  fdt_set_totalsize (fdt, bufsize);\r
\r
  fdt_set_off_mem_rsvmap (\r
    fdt,\r
    FDT_ALIGN (\r
      sizeof (struct fdt_header),\r
      sizeof (struct fdt_reserve_entry)\r
      )\r
    );\r
  fdt_set_off_dt_struct (fdt, fdt_off_mem_rsvmap (fdt));\r
  fdt_set_off_dt_strings (fdt, bufsize);\r
\r
  return 0;\r
}\r
\r
int\r
fdt_resize (\r
  void  *fdt,\r
  void  *buf,\r
  int   bufsize\r
  )\r
{\r
  size_t  headsize, tailsize;\r
  char    *oldtail, *newtail;\r
\r
  FDT_SW_CHECK_HEADER (fdt);\r
\r
  headsize = fdt_off_dt_struct (fdt);\r
  tailsize = fdt_size_dt_strings (fdt);\r
\r
  if ((headsize + tailsize) > bufsize) {\r
    return -FDT_ERR_NOSPACE;\r
  }\r
\r
  oldtail = (char *)fdt + fdt_totalsize (fdt) - tailsize;\r
  newtail = (char *)buf + bufsize - tailsize;\r
\r
  /* Two cases to avoid clobbering data if the old and new\r
   * buffers partially overlap */\r
  if (buf <= fdt) {\r
    memmove (buf, fdt, headsize);\r
    memmove (newtail, oldtail, tailsize);\r
  } else {\r
    memmove (newtail, oldtail, tailsize);\r
    memmove (buf, fdt, headsize);\r
  }\r
\r
  fdt_set_off_dt_strings (buf, bufsize);\r
  fdt_set_totalsize (buf, bufsize);\r
\r
  return 0;\r
}\r
\r
int\r
fdt_add_reservemap_entry (\r
  void      *fdt,\r
  uint64_t  addr,\r
  uint64_t  size\r
  )\r
{\r
  struct fdt_reserve_entry  *re;\r
  int                       offset;\r
\r
  FDT_SW_CHECK_HEADER (fdt);\r
\r
  if (fdt_size_dt_struct (fdt)) {\r
    return -FDT_ERR_BADSTATE;\r
  }\r
\r
  offset = fdt_off_dt_struct (fdt);\r
  if ((offset + sizeof (*re)) > fdt_totalsize (fdt)) {\r
    return -FDT_ERR_NOSPACE;\r
  }\r
\r
  re          = (struct fdt_reserve_entry *)((char *)fdt + offset);\r
  re->address = cpu_to_fdt64 (addr);\r
  re->size    = cpu_to_fdt64 (size);\r
\r
  fdt_set_off_dt_struct (fdt, offset + sizeof (*re));\r
\r
  return 0;\r
}\r
\r
int\r
fdt_finish_reservemap (\r
  void  *fdt\r
  )\r
{\r
  return fdt_add_reservemap_entry (fdt, 0, 0);\r
}\r
\r
int\r
fdt_begin_node (\r
  void        *fdt,\r
  const char  *name\r
  )\r
{\r
  struct fdt_node_header  *nh;\r
  int                     namelen = strlen (name) + 1;\r
\r
  FDT_SW_CHECK_HEADER (fdt);\r
\r
  nh = _fdt_grab_space (fdt, sizeof (*nh) + FDT_TAGALIGN (namelen));\r
  if (!nh) {\r
    return -FDT_ERR_NOSPACE;\r
  }\r
\r
  nh->tag = cpu_to_fdt32 (FDT_BEGIN_NODE);\r
  memcpy (nh->name, name, namelen);\r
  return 0;\r
}\r
\r
int\r
fdt_end_node (\r
  void  *fdt\r
  )\r
{\r
  fdt32_t  *en;\r
\r
  FDT_SW_CHECK_HEADER (fdt);\r
\r
  en = _fdt_grab_space (fdt, FDT_TAGSIZE);\r
  if (!en) {\r
    return -FDT_ERR_NOSPACE;\r
  }\r
\r
  *en = cpu_to_fdt32 (FDT_END_NODE);\r
  return 0;\r
}\r
\r
static int\r
_fdt_find_add_string (\r
  void        *fdt,\r
  const char  *s\r
  )\r
{\r
  char        *strtab = (char *)fdt + fdt_totalsize (fdt);\r
  const char  *p;\r
  int         strtabsize = fdt_size_dt_strings (fdt);\r
  int         len = strlen (s) + 1;\r
  int         struct_top, offset;\r
\r
  p = _fdt_find_string (strtab - strtabsize, strtabsize, s);\r
  if (p) {\r
    return p - strtab;\r
  }\r
\r
  /* Add it */\r
  offset     = -strtabsize - len;\r
  struct_top = fdt_off_dt_struct (fdt) + fdt_size_dt_struct (fdt);\r
  if (fdt_totalsize (fdt) + offset < struct_top) {\r
    return 0;             /* no more room :( */\r
  }\r
\r
  memcpy (strtab + offset, s, len);\r
  fdt_set_size_dt_strings (fdt, strtabsize + len);\r
  return offset;\r
}\r
\r
int\r
fdt_property_placeholder (\r
  void        *fdt,\r
  const char  *name,\r
  int         len,\r
  void        **valp\r
  )\r
{\r
  struct fdt_property  *prop;\r
  int                  nameoff;\r
\r
  FDT_SW_CHECK_HEADER (fdt);\r
\r
  nameoff = _fdt_find_add_string (fdt, name);\r
  if (nameoff == 0) {\r
    return -FDT_ERR_NOSPACE;\r
  }\r
\r
  prop = _fdt_grab_space (fdt, sizeof (*prop) + FDT_TAGALIGN (len));\r
  if (!prop) {\r
    return -FDT_ERR_NOSPACE;\r
  }\r
\r
  prop->tag     = cpu_to_fdt32 (FDT_PROP);\r
  prop->nameoff = cpu_to_fdt32 (nameoff);\r
  prop->len     = cpu_to_fdt32 (len);\r
  *valp         = prop->data;\r
  return 0;\r
}\r
\r
int\r
fdt_property (\r
  void        *fdt,\r
  const char  *name,\r
  const void  *val,\r
  int         len\r
  )\r
{\r
  void  *ptr;\r
  int   ret;\r
\r
  ret = fdt_property_placeholder (fdt, name, len, &ptr);\r
  if (ret) {\r
    return ret;\r
  }\r
\r
  memcpy (ptr, val, len);\r
  return 0;\r
}\r
\r
int\r
fdt_finish (\r
  void  *fdt\r
  )\r
{\r
  char      *p = (char *)fdt;\r
  fdt32_t   *end;\r
  int       oldstroffset, newstroffset;\r
  uint32_t  tag;\r
  int       offset, nextoffset;\r
\r
  FDT_SW_CHECK_HEADER (fdt);\r
\r
  /* Add terminator */\r
  end = _fdt_grab_space (fdt, sizeof (*end));\r
  if (!end) {\r
    return -FDT_ERR_NOSPACE;\r
  }\r
\r
  *end = cpu_to_fdt32 (FDT_END);\r
\r
  /* Relocate the string table */\r
  oldstroffset = fdt_totalsize (fdt) - fdt_size_dt_strings (fdt);\r
  newstroffset = fdt_off_dt_struct (fdt) + fdt_size_dt_struct (fdt);\r
  memmove (p + newstroffset, p + oldstroffset, fdt_size_dt_strings (fdt));\r
  fdt_set_off_dt_strings (fdt, newstroffset);\r
\r
  /* Walk the structure, correcting string offsets */\r
  offset = 0;\r
  while ((tag = fdt_next_tag (fdt, offset, &nextoffset)) != FDT_END) {\r
    if (tag == FDT_PROP) {\r
      struct fdt_property  *prop =\r
        _fdt_offset_ptr_w (fdt, offset);\r
      int  nameoff;\r
\r
      nameoff       = fdt32_to_cpu (prop->nameoff);\r
      nameoff      += fdt_size_dt_strings (fdt);\r
      prop->nameoff = cpu_to_fdt32 (nameoff);\r
    }\r
\r
    offset = nextoffset;\r
  }\r
\r
  if (nextoffset < 0) {\r
    return nextoffset;\r
  }\r
\r
  /* Finally, adjust the header */\r
  fdt_set_totalsize (fdt, newstroffset + fdt_size_dt_strings (fdt));\r
  fdt_set_magic (fdt, FDT_MAGIC);\r
  return 0;\r
}\r