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SAMA5D4-EK kernel config can now boot from a ROMFS file system

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This commit is contained in:
Gregory Nutt
2014-09-09 13:51:13 -06:00
parent b18ff36433
commit f397eeaec4
7 changed files with 1176 additions and 31 deletions
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configs/sama5d4-ek/Kconfig
+32
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@@ -286,6 +286,38 @@ config SAMA5D4EK_HSMCI1_MOUNT_MOUNTPOINT
endif # SAMA5D4EK_HSMCI1_MOUNT
config SAMA5D4EK_ROMFS_MOUNT
bool "ROMFS boot mount"
default n
depends on FS_ROMFS
---help---
By selecting this option, you an build mount a ROMFS file system as
part of the system boot operation. NOTE that the board logic
contains no a priori ROMFS file system. In order to use this option,
you must provide the file nuttx/configs/sama5d4-ek/include/boot_romfsimg.h.
You might use logic in the tool at apps/tools/mkromfsimg.sh to create
this header file.
if SAMA5D4EK_ROMFS_MOUNT
config SAMA5D4EK_ROMFS_ROMDISK_MINOR
int "ROM disk minor device number"
default 0
config SAMA5D4EK_ROMFS_ROMDISK_DEVNAME
string "ROM disk block device"
default "/dev/ram0"
config SAMA5D4EK_ROMFS_ROMDISK_SECTSIZE
int "ROM disk sector size"
default 512
config SAMA5D4EK_ROMFS_MOUNT_MOUNTPOINT
string "ROMFS mount point"
default "/bin"
endif # SAMA5D4EK_ROMFS_MOUNT
if INPUT_MXT
config SAMA5D4EK_MXT_I2CFREQUENCY
configs/sama5d4-ek/README.txt
+98 -21
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@@ -3702,7 +3702,7 @@ Configurations
CONFIG_SAMA5_DDRCS_PGHEAP=n : Don't try to set up the page allocator
Memory Management
CONFIG_GRAN=n : Disable the granule allocator
CONFIG_GRAN=n : Disable the granule allocator
CONFIG_MM_PGALLOC=n : Disable the page allocator
4. A system call interface is enabled and the ELF test programs interface with the base RTOS code system calls. This eliminates the need for symbol tables to link with the base RTOS (symbol tables are still used, however, to interface with the common C library instaniation). Relevant configuration settings:
@@ -3776,17 +3776,69 @@ Configurations
CONFIG_MM_KERNEL_HEAP=y : Enable a kernel heap
CONFIG_MM_KERNEL_HEAPSIZE=8192 : (temporary.. will change)
4. Board initialization is performed performed before the application
4. By default, this configuration is setup to boot from an SD card.
Unfortunately, there some issues when using the SD card that prevent
this from working properly (see STATUS below). And alternative is to
use a built-in ROMFS file system that does not suffer from the
(assumed) HSMCI bug.
So why isn't this the default configuration? Because it does not
build out-of-the-box. You have to take special steps in the build
process as described below.
Assuming that you will want to reconfigure to use the ROMFS (rather than debugging HSCMI), you will need to disable all of these settings:
System Type->ATSAMA5 Peripheral Support
CONFIG_SAMA5_HSMCI0=n : Disable HSMCI0 support
CONFIG_SAMA5_XDMAC0=n : XDMAC0 is no longer needed
System Type
CONFIG_SAMA5_PIO_IRQ=n : PIO interrupts are no longer needed
Device Drivers -> MMC/SD Driver Support
CONFIG_MMCSD=n : Disable MMC/SD support
File System
CONFIG_FS_FAT=n : FAT file system no longer needed
Board Selection
CONFIG_SAMA5D4EK_HSMCI0_MOUNT=y : Don't mount HSMCI0 at boot
And then enable these features in order to use the ROMFS boot file
system:
File System
CONFIG_FS_ROMFS=y : Enable the ROMFS file system
Board Selection
CONFIG_SAMA5D4EK_ROMFS_MOUNT=y : Mount the ROMFS file system at boot
CONFIG_SAMA5D4EK_ROMFS_MOUNT_MOUNTPOINT="/bin"
CONFIG_SAMA5D4EK_ROMFS_ROMDISK_DEVNAME="/dev/ram0"
CONFIG_SAMA5D4EK_ROMFS_ROMDISK_MINOR=0
CONFIG_SAMA5D4EK_ROMFS_ROMDISK_SECTSIZE=512
Then you will need to follow some special build instructions below
in order to build and install the ROMFS file system image.
UPDATE: The ROMFS configuration is pre-configured in the the
file nuttx/configs/sama5d4-ek/knsh/defconfig.ROMFS
5. Board initialization is performed performed before the application
is started:
RTOS Features -> RTOS Hooks
CONFIG_BOARD_INITITIALIZE=y
The board initialization will mount the FAT filesystem on an SD card
inserted int the HSMCI0 slot (full size). The SAMA4D4-EK provides
two SD memory card slots: (1) a full size SD card slot (J10), and
(2) a microSD memory card slot (J11). The full size SD card slot
connects via HSMCI0; the microSD connects vi HSMCI1. See the relevant
In the special ROMFS boot configuration, you need to do nothing
additional: The board initialization will mount the ROMFS file
system at boot time.
In the default configuration, however, the board initialization
will instead mount the FAT filesystem on an SD card inserted in
the HSMCI0 slot (full size). The SAMA4D4-EK provides two SD
memory card slots: (1) a full size SD card slot (J10), and (2) a
microSD memory card slot (J11). The full size SD card slot connects
via HSMCI0; the microSD connects vi HSMCI1. See the relevant
configuration settings above in the paragraph entitled "HSMCI Card
Slots" above.
@@ -3809,21 +3861,46 @@ Configurations
CONFIG_SAMA5D4EK_HSMCI0_MOUNT_FSTYPE="vfat"
CONFIG_SAMA5D4EK_HSMCI0_MOUNT_MOUNTPOINT="/bin"
5. General build directions:
6a. General build directions (boot from SD card):
$ cd nuttx/tools : Go to the tools sub-directory
$ ./configure.sh sama5d4-ek/kernel : Establish this configuration
$ cd .. : Back to the NuttX build directory
: Edit setenv.sh to use the correct path
$ . ./setenv.sh : Set up the PATH variable
$ make : Build the kerne with a dummy ROMFS image
: This should create the nuttx ELF
$ make export : Create the kernel export package
: You should have a file like
: nuttx-export-*.zip
$ cd apps/ : Go to the apps/ directory
$ tools/mkimport.sh -x <zip-file> : Use the full path to nuttx-export-*.zip
$ make import : This will build the file system.
You will then need to copy the files from apps/bin to an SD card to
create the the bootable SD card.
6b. General build directions (boot from ROMFS image):
$ cd nuttx/tools : Go to the tools sub-directory
$ ./configure.sh sama5d4-ek/kernel : Establish this configuration
$ cd .. : Back to the NuttX build directory
: Edit setenv.sh to use the correct path
$ . ./setenv.sh : Set up the PATH variable
$ touch configs/sama5d4-ek/include/boot_romfsimg.h
$ make : Build the kernel with a dummy ROMFS image
: This should create the nuttx ELF
$ make export : Create the kernel export package
: You should have a file like
: nuttx-export-*.zip
$ cd apps/ : Go to the apps/ directory
$ tools/mkimport.sh -x <zip-file> : Use the full path to nuttx-export-*.zip
$ make import : This will build the file system
$ tools/mkromfsimg.sh : Create the real ROMFS image
$ mv boot_romfsimg.h ../nuttx/configs/sama5d4-ek/include/boot_romfsimg.h
$ cd nuttx/ : Rebuild the system with the correct
$ make clean_context all : ROMFS file system
$ cd nuttx/tools : Go to the tools sub-directory
$ ./configure.sh sama5d4-ek/kernel : Establish this configuration
$ cd .. : Back to the NuttX build directory
: Edit setenv.sh to use the correct path
$ . ./setenv.sh : Set up the PATH variable
$ make : Build the kernel
: This should create the nuttx ELF
$ make export : Create the kernel export package
: You should have a file like nuttx-export-*.zip
$ cd apps/ : Go to the apps/ directory
$ tools/mkimport.sh -x <zip-file> : Use the full path to nuttx-export-*.zip
$ make import : This will build the file system
STATUS:
2014-9-4: The kernel works up to the point where the nsh 'init'
configs/sama5d4-ek/include/.gitignore
Executable
+1
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@@ -0,0 +1 @@
/boot_romfsimg.h
configs/sama5d4-ek/knsh/defconfig
+3 -9
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@@ -180,7 +180,7 @@ CONFIG_ARCH_CHIP_ATSAMA5D44=y
# CONFIG_SAMA5_WDT is not set
CONFIG_SAMA5_RTC=y
# CONFIG_SAMA5_ICM is not set
CONFIG_SAMA5_HSMC=y
# CONFIG_SAMA5_HSMC is not set
# CONFIG_SAMA5_SMD is not set
# CONFIG_SAMA5_SAIC is not set
# CONFIG_SAMA5_UART0 is not set
@@ -477,13 +477,7 @@ CONFIG_DEV_RANDOM=y
# CONFIG_ARCH_HAVE_PWM_PULSECOUNT is not set
# CONFIG_PWM is not set
CONFIG_ARCH_HAVE_I2CRESET=y
CONFIG_I2C=y
# CONFIG_I2C_SLAVE is not set
CONFIG_I2C_TRANSFER=y
CONFIG_I2C_WRITEREAD=y
# CONFIG_I2C_POLLED is not set
# CONFIG_I2C_TRACE is not set
CONFIG_I2C_RESET=y
# CONFIG_I2C is not set
# CONFIG_SPI is not set
# CONFIG_I2S is not set
CONFIG_RTC=y
@@ -492,7 +486,7 @@ CONFIG_RTC_DATETIME=y
# CONFIG_WATCHDOG is not set
# CONFIG_TIMER is not set
# CONFIG_ANALOG is not set
CONFIG_AUDIO_DEVICES=y
# CONFIG_AUDIO_DEVICES is not set
# CONFIG_VIDEO_DEVICES is not set
# CONFIG_BCH is not set
# CONFIG_INPUT is not set
configs/sama5d4-ek/knsh/defconfig.ROMFS
+999
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File diff suppressed because it is too large Load Diff
configs/sama5d4-ek/src/sam_bringup.c
+36 -1
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@@ -50,14 +50,23 @@
# include <apps/usbmonitor.h>
#endif
#include <nuttx/fs/ramdisk.h>
#include <nuttx/binfmt/elf.h>
#include "sama5d4-ek.h"
#ifdef HAVE_ROMFS
# include <arch/board/boot_romfsimg.h>
#endif
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
#define NSECTORS(n) \
(((n)+CONFIG_SAMA5D4EK_ROMFS_ROMDISK_SECTSIZE-1) / \
CONFIG_SAMA5D4EK_ROMFS_ROMDISK_SECTSIZE)
/* Debug ********************************************************************/
#ifdef CONFIG_BOARD_INITIALIZE
@@ -86,7 +95,7 @@ int sam_bringup(void)
{
#if defined(HAVE_NAND) || defined(HAVE_AT25) || defined(HAVE_HSMCI) || \
defined(HAVE_USBHOST) || defined(HAVE_USBMONITOR) || defined(HAVE_WM8904) || \
defined(HAVE_AUTOMOUNTER) || defined(HAVE_ELF)
defined(HAVE_AUTOMOUNTER) || defined(HAVE_ELF) || defined(HAVE_ROMFS)
int ret;
#endif
@@ -178,6 +187,32 @@ int sam_bringup(void)
sam_automount_initialize();
#endif
#ifdef HAVE_ROMFS
/* Create a ROM disk for the /etc filesystem */
ret = romdisk_register(CONFIG_SAMA5D4EK_ROMFS_ROMDISK_MINOR, romfs_img,
NSECTORS(romfs_img_len),
CONFIG_SAMA5D4EK_ROMFS_ROMDISK_SECTSIZE);
if (ret < 0)
{
message("ERROR: romdisk_register failed: %d\n", -ret);
}
else
{
/* Mount the file system */
ret = mount(CONFIG_SAMA5D4EK_ROMFS_ROMDISK_DEVNAME,
CONFIG_SAMA5D4EK_ROMFS_MOUNT_MOUNTPOINT,
"romfs", MS_RDONLY, NULL);
if (ret < 0)
{
message("ERROR: mount(%s,%s,romfs) failed: %d\n",
CONFIG_SAMA5D4EK_ROMFS_ROMDISK_DEVNAME,
CONFIG_SAMA5D4EK_ROMFS_MOUNT_MOUNTPOINT, errno);
}
}
#endif
#ifdef HAVE_USBHOST
/* Initialize USB host operation. sam_usbhost_initialize() starts a thread
* will monitor for USB connection and disconnection events.
configs/sama5d4-ek/src/sama5d4-ek.h
+7
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@@ -69,6 +69,7 @@
#define HAVE_AUDIO_NULL 1
#define HAVE_PMIC 1
#define HAVE_ELF 1
#define HAVE_ROMFS 1
/* HSMCI */
/* Can't support MMC/SD if the card interface(s) are not enable */
@@ -462,6 +463,12 @@
# undef HAVE_ELF
#endif
/* ROMFS */
#ifndef CONFIG_FS_ROMFS
# undef HAVE_ROMFS
#endif
/* LEDs *****************************************************************************/
/* There are 3 LEDs on the SAMA5D4-EK:
*