Qualcomm EDL ram dump functionality

#define SD_PATH                  "/mmc1/"
#define SD_RAM_DUMP_PATH SD_PATH "ram_dump/"

void boot_ram_dumps_to_sd_card( bl_shared_data_type *bl_shared_data )
{
  do /* dummy while loop which executes only once and used to break on error */
  {
    /* Poll the hotplug device */
    boot_hotplug_poll_and_mount_first_fat(HOTPLUG_TYPE_MMC, HOTPLUG_ITER_EXTERNAL_DEVICES_ONLY);

    /* Return if cookie file doesn't exit.*/
    if((boot_ram_dump_check_rdcookie(SD_RAM_DUMP_PATH) < 0)  &&
       (boot_ram_dump_check_rdcookie(SD_PATH) < 0))
        break;

#ifdef FEATURE_DLOAD_MEM_DEBUG
    /*only perform memory debug operations when it's supported*/
    if(dload_mem_debug_supported())
    {
    /* Initialize the debug memory regions array */
      dload_mem_debug_init();
    }
#endif

    /*Store the ramdumps to sd card without deletion*/
    boot_process_sd_dumps();

    /* reset target if reset cookie present */
    boot_ramdump_reset();
  } while(0);

  /* At the end of sd card ram dump, if we are in raw ram dump mode, reset the device
     so we don't enter sahara */
  if((boot_shared_imem_cookie_ptr != NULL) &&
     (boot_shared_imem_cookie_ptr->uefi_ram_dump_magic == BOOT_RAW_RAM_DUMP_MAGIC_NUM))
  {
      mmu_flush_cache();
      boot_hw_reset(BOOT_WARM_RESET_TYPE);
  }
}

static int boot_ram_dump_check_rdcookie(const char *path)
{
    uint32 str_size = 0;
    int fd;

    str_size = strlcpy(cookiefilepath, path, MAX_FILE_NAME);
    BL_VERIFY((str_size < MAX_FILE_NAME), BL_ERR_SBL);

    str_size = strlcpy(cookiefilename, path, MAX_FILE_NAME);
    BL_VERIFY((str_size < MAX_FILE_NAME), BL_ERR_SBL);

    str_size = strlcat(cookiefilename, "rdcookie.txt", MAX_FILE_NAME);
    BL_VERIFY((str_size < MAX_FILE_NAME), BL_ERR_SBL);

    fd = boot_efs_open(cookiefilename, O_RDONLY);

    if (fd >= 0)
    {
        boot_efs_close(fd);
    }

    return fd;
}