common/aboot.c

   1 /*
   2  * Copyright (c) 2009, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Copyright (c) 2009-2014, The Linux Foundation. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  *     * Redistributions of source code must retain the above copyright
  10  *       notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above copyright
  12  *       notice, this list of conditions and the following disclaimer in the
  13  *       documentation and/or other materials provided with the distribution.
  14  *     * Neither the name of The Linux Foundation nor
  15  *       the names of its contributors may be used to endorse or promote
  16  *       products derived from this software without specific prior written
  17  *       permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22  * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  * NOTE:
  32  *   Although it is very similar, this license text is not identical
  33  *   to the "BSD-3-Clause", therefore, DO NOT MODIFY THIS LICENSE TEXT!
  34  */
  35
  36 void cmd_flash_mmc_sparse_img(const char *arg, void *data, unsigned sz)
  37 {
  38         unsigned int chunk;
  39         unsigned int chunk_data_sz;
  40         uint32_t *fill_buf = NULL;
  41         uint32_t fill_val;
  42         uint32_t chunk_blk_cnt = 0;
  43         sparse_header_t *sparse_header;
  44         chunk_header_t *chunk_header;
  45         uint32_t total_blocks = 0;
  46         unsigned long long ptn = 0;
  47         unsigned long long size = 0;
  48         int index = INVALID_PTN;
  49         int i;
  50         uint8_t lun = 0;
  51
  52         index = partition_get_index(arg);
  53         ptn = partition_get_offset(index);
  54         if(ptn == 0) {
  55                 fastboot_fail("partition table doesn't exist");
  56                 return;
  57         }
  58
  59         size = partition_get_size(index);
  60         if (ROUND_TO_PAGE(sz,511) > size) {
  61                 fastboot_fail("size too large");
  62                 return;
  63         }
  64
  65         lun = partition_get_lun(index);
  66         mmc_set_lun(lun);
  67
  68         /* Read and skip over sparse image header */
  69         sparse_header = (sparse_header_t *) data;
  70         if ((sparse_header->total_blks * sparse_header->blk_sz) > size) {
  71                 fastboot_fail("size too large");
  72                 return;
  73         }
  74
  75         data += sparse_header->file_hdr_sz;
  76         if (sparse_header->file_hdr_sz > sizeof(sparse_header_t))
  77         {
  78                 /*
  79                  * Skip the remaining bytes in a header that is longer than
  80                  * we expected.
  81                  */
  82                 data += (sparse_header->file_hdr_sz - sizeof(sparse_header_t));
  83         }
  84
  85         debug("=== Sparse Image Header ===\n");
  86         debug("magic: 0x%x\n", sparse_header->magic);
  87         debug("major_version: 0x%x\n", sparse_header->major_version);
  88         debug("minor_version: 0x%x\n", sparse_header->minor_version);
  89         debug("file_hdr_sz: %d\n", sparse_header->file_hdr_sz);
  90         debug("chunk_hdr_sz: %d\n", sparse_header->chunk_hdr_sz);
  91         debug("blk_sz: %d\n", sparse_header->blk_sz);
  92         debug("total_blks: %d\n", sparse_header->total_blks);
  93         debug("total_chunks: %d\n", sparse_header->total_chunks);
  94
  95         /* Start processing chunks */
  96         for (chunk=0; chunk<sparse_header->total_chunks; chunk++)
  97         {
  98                 /* Read and skip over chunk header */
  99                 chunk_header = (chunk_header_t *) data;
 100                 data += sizeof(chunk_header_t);
 101
 102                 debug("=== Chunk Header ===\n");
 103                 debug("chunk_type: 0x%x\n", chunk_header->chunk_type);
 104                 debug("chunk_data_sz: 0x%x\n", chunk_header->chunk_sz);
 105                 debug("total_size: 0x%x\n", chunk_header->total_sz);
 106
 107                 if (sparse_header->chunk_hdr_sz > sizeof(chunk_header_t))
 108                 {
 109                         /*
 110                          * Skip the remaining bytes in a header that is longer
 111                          * than we expected.
 112                          */
 113                         data += (sparse_header->chunk_hdr_sz -
 114                                  sizeof(chunk_header_t));
 115                 }
 116
 117                 chunk_data_sz = sparse_header->blk_sz * chunk_header->chunk_sz;
 118                 switch (chunk_header->chunk_type)
 119                 {
 120                         case CHUNK_TYPE_RAW:
 121                         if (chunk_header->total_sz !=
 122                             (sparse_header->chunk_hdr_sz + chunk_data_sz))
 123                         {
 124                                 fastboot_fail(
 125                                         "Bogus chunk size for chunk type Raw");
 126                                 return;
 127                         }
 128
 129                         if (mmc_write(ptn +
 130                                       ((uint64_t)total_blocks *
 131                                                  sparse_header->blk_sz),
 132                                       chunk_data_sz, (unsigned int *)data))
 133                         {
 134                                 fastboot_fail("flash write failure");
 135                                 return;
 136                         }
 137                         total_blocks += chunk_header->chunk_sz;
 138                         data += chunk_data_sz;
 139                         break;
 140
 141                         case CHUNK_TYPE_FILL:
 142                         if (chunk_header->total_sz !=
 143                             (sparse_header->chunk_hdr_sz + sizeof(uint32_t)))
 144                         {
 145                                 fastboot_fail(
 146                                         "Bogus chunk size for chunk type FILL");
 147                                 return;
 148                         }
 149
 150                         fill_buf = (uint32_t *)
 151                                    memalign(CACHE_LINE,
 152                                             ROUNDUP(sparse_header->blk_sz,
 153                                                     CACHE_LINE));
 154                         if (!fill_buf)
 155                         {
 156                                 fastboot_fail(
 157                                         "Malloc failed for: CHUNK_TYPE_FILL");
 158                                 return;
 159                         }
 160
 161                         fill_val = *(uint32_t *)data;
 162                         data = (char *) data + sizeof(uint32_t);
 163                         chunk_blk_cnt = chunk_data_sz / sparse_header->blk_sz;
 164
 165                         for (i = 0; i < (sparse_header->blk_sz / sizeof(fill_val)); i++)
 166                         {
 167                                 fill_buf[i] = fill_val;
 168                         }
 169
 170                         for (i = 0; i < chunk_blk_cnt; i++)
 171                         {
 172                                 if (mmc_write(ptn +
 173                                               ((uint64_t)total_blocks *
 174                                                          sparse_header->blk_sz),
 175                                               sparse_header->blk_sz, fill_buf))
 176                                 {
 177                                         fastboot_fail("flash write failure");
 178                                         free(fill_buf);
 179                                         return;
 180                                 }
 181
 182                                 total_blocks++;
 183                         }
 184
 185                         free(fill_buf);
 186                         break;
 187
 188                         case CHUNK_TYPE_DONT_CARE:
 189                         total_blocks += chunk_header->chunk_sz;
 190                         break;
 191
 192                         case CHUNK_TYPE_CRC:
 193                         if (chunk_header->total_sz !=
 194                             sparse_header->chunk_hdr_sz)
 195                         {
 196                                 fastboot_fail(
 197                                         "Bogus chunk size for chunk type Dont Care");
 198                                 return;
 199                         }
 200                         total_blocks += chunk_header->chunk_sz;
 201                         data += chunk_data_sz;
 202                         break;
 203
 204                         default:
 205                         debug("Unkown chunk type: %x\n",
 206                               chunk_header->chunk_type);
 207                         fastboot_fail("Unknown chunk type");
 208                         return;
 209                 }
 210         }
 211
 212         debug("Wrote %d blocks, expected to write %d blocks\n",
 213               total_blocks, sparse_header->total_blks);
 214
 215         if (total_blocks != sparse_header->total_blks)
 216                 fastboot_fail("sparse image write failure");
 217
 218         fastboot_okay("");
 219         return;
 220 }