117 lines
4.1 KiB
C
117 lines
4.1 KiB
C
/****************************************************************************
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* apps/graphics/traveler/trv_romfs.c
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* Mount the ROMFS demo world
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#ifdef CONFIG_GRAPHICS_TRAVELER_ROMFSDEMO
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#include <sys/mount.h>
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#include <sys/types.h>
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#include <sys/boardctl.h>
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#include <stdio.h>
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#include <nuttx/drivers/ramdisk.h>
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#include "trv_romfs.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_FS_ROMFS
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# error You must select CONFIG_FS_ROMFS in your configuration file
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#endif
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#ifdef CONFIG_DISABLE_MOUNTPOINT
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# error You must not disable mountpoints via CONFIG_DISABLE_MOUNTPOINT
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#endif
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#ifndef CONFIG_BOARDCTL_ROMDISK
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# error You must select CONFIG_BOARDCTL_ROMDISK in your configuration file
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#endif
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/* Describe the ROMFS file system */
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#define SECTORSIZE 512
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#define NSECTORS(b) (((b)+SECTORSIZE-1)/SECTORSIZE)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: trv_mount_world
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*
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* Description:
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* Mount the demo world as a ROMFS file system mounted at 'mountpoint'
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*
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****************************************************************************/
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int trv_mount_world(int minor, FAR const char *mountpoint)
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{
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struct boardioc_romdisk_s desc;
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char devpath[16];
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int ret;
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/* Create a ROM disk for the ROMFS filesystem */
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desc.minor = minor; /* Minor device number of the RAM disk. */
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desc.nsectors = NSECTORS(trv_romfs_img_len); /* The number of sectors in the RAM disk */
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desc.sectsize = SECTORSIZE; /* The size of one sector in bytes */
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desc.image = trv_romfs_img; /* File system image */
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ret = boardctl(BOARDIOC_ROMDISK, (uintptr_t)&desc);
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if (ret < 0)
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{
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return ret;
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}
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/* Get the ROM disk device name */
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snprintf(devpath, 16, "/dev/ram%d", minor);
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/* Mount the file system */
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ret = mount(devpath, mountpoint, "romfs", MS_RDONLY, NULL);
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return ret;
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}
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#endif /* CONFIG_GRAPHICS_TRAVELER_ROMFSDEMO */
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