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ROMFS for STM32F4 Discovery board

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This commit is contained in:
Tomasz Wozniak 2017-09-28 11:36:40 +02:00
parent 8ad1e72536
commit 9972897a0a
5 changed files with 243 additions and 0 deletions
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22
configs/stm32f4discovery/Kconfig
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@ -12,6 +12,28 @@ config STM32F4DISBB
Select if you are using the STM32F4DIS-BB base board with the
STM32F4Discovery.
config STM32_ROMFS
bool "Automount baked-in ROMFS image"
default n
depends on FS_ROMFS
---help---
Select STM32_ROMFS_IMAGEFILE, STM32_ROMFS_DEV_MINOR, STM32_ROMFS_MOUNTPOINT
config STM32_ROMFS_DEV_MINOR
int "Minor for the block device backing the data"
depends on STM32_ROMFS
default 64
config STM32_ROMFS_MOUNTPOINT
string "Mountpoint of the custom romfs image"
depends on STM32_ROMFS
default "/rom"
config STM32_ROMFS_IMAGEFILE
string "ROMFS image file to include into build"
depends on STM32_ROMFS
default "../../../rom.img"
config STM32F4DISCO_USBHOST_STACKSIZE
int "USB host waiter stack size"
default 1024

4
configs/stm32f4discovery/src/Makefile
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@ -156,6 +156,10 @@ ifeq ($(CONFIG_TIMER),y)
CSRCS += stm32_timer.c
endif
ifeq ($(CONFIG_STM32_ROMFS),y)
CSRCS += stm32_romfs_initialize.c
endif
ifeq ($(CONFIG_BOARDCTL_UNIQUEID),y)
CSRCS += stm32_uid.c
endif

10
configs/stm32f4discovery/src/stm32_bringup.c
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@ -52,6 +52,7 @@
#include <nuttx/binfmt/elf.h>
#include "stm32.h"
#include "stm32_romfs.h"
#ifdef CONFIG_STM32_OTGFS
# include "stm32_usbhost.h"
@ -287,6 +288,15 @@ int stm32_bringup(void)
}
#endif
#ifdef CONFIG_STM32_ROMFS
ret = stm32_romfs_initialize();
if (ret < 0)
{
serr("ERROR: Failed to mount romfs at %s: %d\n",
STM32_ROMFS_MOUNTPOINT, ret);
}
#endif
#ifdef CONFIG_SENSORS_XEN1210
ret = xen1210_archinitialize(0);
if (ret < 0)

62
configs/stm32f4discovery/src/stm32_romfs.h Normal file
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@ -0,0 +1,62 @@
/****************************************************************************
* configs/stm32f4discovery/src/stm32_romfs.h
*
* Copyright (C) 2017 Tomasz Wozniak. All rights reserved.
* Author: Tomasz Wozniak <t.wozniak@samsung.com>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
****************************************************************************/
#ifndef __CONFIGS_STM32F4DISCOVERY_SRC_STM32_ROMFS_H
#define __CONFIGS_STM32F4DISCOVERY_SRC_STM32_ROMFS_H
#ifdef CONFIG_STM32_ROMFS
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define ROMFS_SECTOR_SIZE 64
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: stm32_romfs_initialize
*
* Description:
* Registers built-in ROMFS image as block device and mounts it.
*
* Returned Value:
* 0 on success, <0 on error.
****************************************************************************/
int stm32_romfs_initialize(void);
#endif /* CONFIG_STM32_ROMFS */
#endif /* __CONFIGS_STM32F4DISCOVERY_SRC_STM32_ROMFS_H */

145
configs/stm32f4discovery/src/stm32_romfs_initialize.c Normal file
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@ -0,0 +1,145 @@
/*****************************************************************************
* configs/stm32f4discovery/src/stm32_romfs_initialize.c
* This file provides contents of an optional ROMFS volume, mounted at boot.
*
* Copyright (C) 2017 Tomasz Wozniak. All rights reserved.
* Author: Tomasz Wozniak <t.wozniak@samsung.com>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
****************************************************************************/
/*****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/drivers/ramdisk.h>
#include "stm32_romfs.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_STM32_ROMFS
#error "CONFIG_STM32_ROMFS must be defined"
#else
#ifndef CONFIG_STM32_ROMFS_IMAGEFILE
#error "CONFIG_STM32_ROMFS_IMAGEFILE must be defined"
#endif
#ifndef CONFIG_STM32_ROMFS_DEV_MINOR
#error "CONFIG_STM32_ROMFS_DEV_MINOR must be defined"
#endif
#ifndef CONFIG_STM32_ROMFS_MOUNTPOINT
#error "CONFIG_STM32_ROMFS_MOUNTPOINT must be defined"
#endif
#define NSECTORS(size) (((size) + ROMFS_SECTOR_SIZE - 1)/ROMFS_SECTOR_SIZE)
#define STR2(m) #m
#define STR(m) STR2(m)
#define MKMOUNT_DEVNAME(m) "/dev/ram" STR(m)
#define MOUNT_DEVNAME MKMOUNT_DEVNAME(CONFIG_STM32_ROMFS_DEV_MINOR)
/****************************************************************************
* Private Data
****************************************************************************/
__asm__ (
".section .rodata\n"
".balign 16\n"
".globl romfs_data_begin\n"
"romfs_data_begin:\n"
".incbin " STR(CONFIG_STM32_ROMFS_IMAGEFILE) "\n"\
\
".balign " STR(ROMFS_SECTOR_SIZE) "\n"
".globl romfs_data_end\n"
"romfs_data_end:\n"
".globl romfs_data_size\n"
"romfs_data_size:\n"
".word romfs_data_end - romfs_data_begin\n");
extern const char romfs_data_begin;
extern const char romfs_data_end;
extern const int romfs_data_size;
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_romfs_initialize
*
* Description:
* Registers the aboveincluded binary file as block device.
* Then mounts the block device as ROMFS filesystems.
*
* Returned Value:
* 0 on success, <0 on error.
*
* Assumptions/Limitations:
* Memory addresses [&romfs_data_begin .. &romfs_data_begin) should contain
* ROMFS volume data, as included in the assembly snippet above (l. 84).
*
****************************************************************************/
int stm32_romfs_initialize(void)
{
int ret;
/* Create a ROM disk for the /etc filesystem */
long int romfs_data_len = &romfs_data_end - &romfs_data_begin;
ret = romdisk_register(CONFIG_STM32_ROMFS_DEV_MINOR, &romfs_data_begin,
NSECTORS(romfs_data_len), ROMFS_SECTOR_SIZE);
if (ret < 0)
{
ferr("ERROR: romdisk_register failed: %d\n", -ret);
return -1;
}
/* Mount the file system */
finfo("Mounting ROMFS filesystem at target=%s with source=%s\n",
CONFIG_STM32_ROMFS_MOUNTPOINT, MOUNT_DEVNAME);
ret = mount(MOUNT_DEVNAME, CONFIG_STM32_ROMFS_MOUNTPOINT,
"romfs", MS_RDONLY, NULL);
if (ret < 0)
{
ferr("ERROR: mount(%s,%s,romfs) failed: %d\n",
MOUNT_DEVNAME, CONFIG_STM32_ROMFS_MOUNTPOINT, errno);
return -1;
}
return 0;
}
#endif /* CONFIG_STM32_ROMFS */