Did you check to see if your flash banks are unlocked? Chetan Anantharaman Motorola Labs
-----Original Message----- From: [EMAIL PROTECTED] [mailto:linuxppc-embedded-bounces+w16155=email.mot.com at ozlabs.org] On Behalf Of Ben Warren Sent: Saturday, July 01, 2006 4:14 PM To: linuxppc-embedded at ozlabs.org Subject: JFFS2 FS is read-only (not what I want) Hello, When I boot from a JFFS2 file system on my eval board, the file system is effectively read-only, and I can't figure out why. I'm pretty sure the kernel's configured for R/W MTD block access. Any help is greatly appreciated. The hardware in use is: Freescale MPC8349EMDS eval board. 8MB Q-flash with 64 uniform 128k sectors Here are the symptoms: # du -s 265492 . <-- only 265k of data # df Filesystem 1k-blocks Used Available Use% Mounted on /dev/mtdblock4 2048 2048 0 100% / # mount /dev/mtdblock4 on / type jffs2 (rw) /proc on /proc type proc (rw) Here's what the kernel spits out at boot-up: *** physmap flash device: 800000 at fe000000 phys_mapped_flash: Found 1 x16 devices at 0x0 in 16-bit bank Command set type 1 Intel/Sharp Extended Query Table at 0x0031 Using buffer write method cfi_cmdset_0001: Erase suspend on write enabled cmdlinepart partition parsing not available RedBoot partition parsing not available Using physmap partition definition Creating 6 MTD partitions on "phys_mapped_flash": 0x00000000-0x00040000 : "u-boot" 0x00040000-0x00080000 : "env" 0x00080000-0x00280000 : "kernel" <-- kernel boots from here 0x00280000-0x00480000 : "initrd" <-- no initrd, this is empty 0x00480000-0x00680000 : "jffs2" <-- 2MB partition 0x00680000-0x00800000 : "user" <-- empty *** I created the MTD partitions in a u-boot image that was pulled from the GIT tree about a week ago, and my kernel is 2.6.17-based. I wrote some board init code that sets the MTD physical mappings. Here are the MTD and JFFS2 parts of my .config file: *** # Memory Technology Devices (MTD) # CONFIG_MTD=y # CONFIG_MTD_DEBUG is not set # CONFIG_MTD_CONCAT is not set CONFIG_MTD_PARTITIONS=y # CONFIG_MTD_REDBOOT_PARTS is not set # CONFIG_MTD_CMDLINE_PARTS is not set # # User Modules And Translation Layers # CONFIG_MTD_CHAR=y CONFIG_MTD_BLOCK=y # CONFIG_FTL is not set # CONFIG_NFTL is not set # CONFIG_INFTL is not set # CONFIG_RFD_FTL is not set # # RAM/ROM/Flash chip drivers # CONFIG_MTD_CFI=y # CONFIG_MTD_JEDECPROBE is not set CONFIG_MTD_GEN_PROBE=y # CONFIG_MTD_CFI_ADV_OPTIONS is not set CONFIG_MTD_MAP_BANK_WIDTH_1=y CONFIG_MTD_MAP_BANK_WIDTH_2=y CONFIG_MTD_MAP_BANK_WIDTH_4=y # CONFIG_MTD_MAP_BANK_WIDTH_8 is not set # CONFIG_MTD_MAP_BANK_WIDTH_16 is not set # CONFIG_MTD_MAP_BANK_WIDTH_32 is not set CONFIG_MTD_CFI_I1=y CONFIG_MTD_CFI_I2=y # CONFIG_MTD_CFI_I4 is not set # CONFIG_MTD_CFI_I8 is not set CONFIG_MTD_CFI_INTELEXT=y # CONFIG_MTD_CFI_AMDSTD is not set CONFIG_MTD_CFI_STAA=y CONFIG_MTD_CFI_UTIL=y # CONFIG_MTD_RAM is not set # CONFIG_MTD_ROM is not set # CONFIG_MTD_ABSENT is not set # CONFIG_MTD_OBSOLETE_CHIPS is not set # # Mapping drivers for chip access # # CONFIG_MTD_COMPLEX_MAPPINGS is not set CONFIG_MTD_PHYSMAP=y CONFIG_MTD_PHYSMAP_START=0xFE000000 CONFIG_MTD_PHYSMAP_LEN=0x800000 CONFIG_MTD_PHYSMAP_BANKWIDTH=2 # CONFIG_MTD_PLATRAM is not set # CONFIG_JFFS_FS is not set CONFIG_JFFS2_FS=y CONFIG_JFFS2_FS_DEBUG=0 # CONFIG_JFFS2_FS_WRITEBUFFER is not set # CONFIG_JFFS2_SUMMARY is not set # CONFIG_JFFS2_COMPRESSION_OPTIONS is not set CONFIG_JFFS2_ZLIB=y CONFIG_JFFS2_RTIME=y # CONFIG_JFFS2_RUBIN is not set *** The file system is the SELF that is included with DENX's ELDK, and built as at: http://www.denx.de/wiki/view/DULG/RootFileSystemDesignAndBuilding I used the following command to create the file system image, that was then loaded at address 0xfe480000 via U-boot: > mkfs.jffs2 -U -d rootfs -D rootfs_device.tab -b -e 0x20000 -o jffs2.img I modified the table to name my serial devices /dev/ttyS0 and /dev/ttyS1 thanks for the help. Sorry if this is too verbose or includes the wrong information. regards, Ben _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded at ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
