Dear All, I am trying to port linux to a Cogent CSB 637 board (AT91RM9200). The kernel is loading up but is unable to mount the cramfs root filesystem image from the flash memory. I am using uMon as the bootloader and it seems that the it is not passing the command line arguments to the kernel. In the startlinux script (shell script to start the kernel, attached with this email), the kernel command line is defined as: heap -m 1024 # (note: -s creates a new string; -S appends to an existing string) # (note: the trailing spaces are so that appends work as expected) # pm -s $MALLOC "mem=32M console=ttyS0,38400 " pm -S $MALLOC "ip=$IPADD:$NFSSERVER:$GIPADD:$NETMASK::eth0:off " # # TODO: pick from and/or adapt one of the two following # examples to specify the source of the root filesystem: # # this example uses MTD and flash for the root filesystem pm -S $MALLOC "root=31:0 mtdparts=$TARGET:$ROOTDIR_SIZE@$ROOTDIR_BASE(root)ro " # # Example that tacks on video parameters # (for the CSB625's 640x480 display, in this case) # pm -S $MALLOC "video=pxafb:mode:640x480-16,active,left:1,right:161,hsynclen:1,upper:0,lower:31,vsynclen:32,hsync:0,vsync:0,outputen:1,pixclockpol:0,pixclock:25000 " # # Launch the kernel, pass it the command line call $APPRAMBASE 0 648 $MALLOC exit # But the kernel gets booted with the default command line: Kernel command line: mem=32M console=ttyS0,38400 initrd=0x20410000,3145728 rootw I have also tried to pass the command line by typing it directly after the call $APPRAMBASE, but of no avail. call $APPRAMBASE 0 648 mem=32M console=ttyS0,38400 ip=$IPADD:$NFSSERVER:$GIPADD:$NETMASK::eth0:off root=31:0 mtdparts=$TARGET:$ROOTDIR_SIZE@$ROOTDIR_BASE(root)ro Is it something wrong in the bootloader or some kernel configuration problem? Is it something due to no/wrong ATAGs passed by the bootloader? (I am running a Kernel 2.6.26 image compiled using csb637_defconfig. I have also tried the same with kernels 2.6.10, 2.6.20, 2.6.24 but I still get the same error). Thanks Sourya -- Sourya Roy Electrical Engineering (Class of 2011) Northwestern University Evanston, Illinois souryaroy@xxxxxxxxx ***************************** The startlinux script for your reference: ############################################################################### # GX-Linux Startup Script for both ROMFS and NFS Server Filesystem mounts ############################################################################### # (c)2005 Microcross, Inc. # Last update: 20050607 ############################################################################### # # # Files/Target defined in TFS (Tiny FileSystem) set TARGET flash00 set ROOTDIR romdisk set KERNEL zImage # # DHCPWAIT: echo sleep 1... sleep 1 if $ARG1 seq "nfs" goto BOOTNFS if $IPADD seq DHCP goto DHCPWAIT if $IPADD seq DHCPV goto DHCPWAIT if $IPADD seq DHCPv goto DHCPWAIT echo IP Address OK, $IPADD # # TODO: set this variable # Set if you are going to use a TFTP server set TFTPSERVER 192.168.0.220 ############################################################################### # # # # check for filesystem image in flash tfs base $ROOTDIR ROOTDIR_BASE tfs size $ROOTDIR ROOTDIR_SIZE # # Verify that a seemingly-useful filesystemthe # image is present; abort if it isn't # (delete these two tests if you are using NFS exclusively) if $ROOTDIR_BASE seq \$ROOTDIR_BASE goto NO_FILE if $ROOTDIR_SIZE seq \$ROOTDIR_SIZE goto NO_FILE # # ok, we found what looks like a filesystem in flash, # (based only on the name of the file) # do some math to figure out where it is set ROOTDIR_BASE=$ROOTDIR_BASE-$BOOTROMBASE echo $ROOTDIR: size=$ROOTDIR_SIZE base=$ROOTDIR_BASE # # Check for a kernel tfs base $KERNEL KERNEL_BASE tfs size $KERNEL KERNEL_SIZE # if $KERNEL_BASE seq \$KERNEL_BASE goto GET_KERNEL if $KERNEL_SIZE seq \$KERNEL_SIZE goto GET_KERNEL # # Found a kernel, load it into RAM tfs cp $KERNEL $APPRAMBASE echo $KERNEL: size=$KERNEL_SIZE base=$APPRAMBASE # # GOT_KERNEL: # # allocate memory for the kernel command line # (as a side effect, this command sets $MALLOC) heap -m 1024 # ############################################################################### # if $ARG1 seq "nfs" goto BOOTNFS # ############################################################################### # # (note: -s creates a new string; -S appends to an existing string) # (note: the trailing spaces are so that appends work as expected) # pm -s $MALLOC "mem=32M console=ttyS0,38400 " pm -S $MALLOC "ip=$IPADD:$NFSSERVER:$GIPADD:$NETMASK::eth0:off " # # TODO: pick from and/or adapt one of the two following # examples to specify the source of the root filesystem: # # this example uses MTD and flash for the root filesystem pm -S $MALLOC "root=31:0 mtdparts=$TARGET:$ROOTDIR_SIZE@$ROOTDIR_BASE(root)ro " # # Example that tacks on video parameters # (for the CSB625's 640x480 display, in this case) # pm -S $MALLOC "video=pxafb:mode:640x480-16,active,left:1,right:161,hsynclen:1,upper:0,lower:31,vsynclen:32,hsync:0,vsync:0,outputen:1,pixclockpol:0,pixclock:25000 " # # Launch the kernel, pass it the command line call $APPRAMBASE 0 648 $MALLOC exit # ############################################################################### # # BOOTNFS: # ############################################################################### # # if $ARG2 sne \$ARG2 gosub SET_NFSSERVER if $NFSSERVER seq \$NFSSERVER goto NO_NFSSERVER # if $ARG3 sne \$ARG3 gosub SET_NFSPATH if $NFSPATH seq \$NFSPATH goto NO_NFSPATH goto NFS_BOOT # # SET_NFSSERVER: set NFSSERVER $ARG2 return # # SET_NFSPATH: set NFSPATH $ARG3 return # # # NFS_BOOT: # # (note: -s creates a new string; -S appends to an existing string) # (note: the trailing spaces are so that appends work as expected) # pm -s $MALLOC "mem=32M console=ttyS0,38400 " pm -S $MALLOC "ip=$IPADD:$NFSSERVER:$GIPADD:$NETMASK::eth0:off " # # # This example uses an NFS server for the root filesystem pm -S $MALLOC "root=0:0 nfsroot=$NFSSERVER:$NFSPATH rw " # # Example that tacks on video parameters # (for the CSB625's 640x480 display, in this case) # pm -S $MALLOC "video=pxafb:mode:640x480-16,active,left:1,right:161,hsynclen:1,upper:0,lower:4,vsynclen:32,hsync:0,vsync:0,outputen:1,pixclockpol:0,pixclock:25000 " # # Launch the kernel, pass it the combined command line call $APPRAMBASE $MALLOC exit # ############################################################################### # # # GET_KERNEL: # download kernel from TFTP server tftp $TFTPSERVER get $BOARD/$KERNEL if $TFTPGET seq \$TFTPGET goto NO_KERNEL # echo $KERNEL: size=$TFTPGET base=$APPRAMBASE goto GOT_KERNEL # ############################################################################### # # Error Handling # ############################################################################### # # NO_FILE: echo Cannot find filesystem: $ROOTDIR echo Abort. exit # # NO_KERNEL: echo Cannot find kernel file: $KERNEL echo Abort. exit # # NO_NFSSERVER: echo Cannot find NFS server, check your \$NFSSERVER variable echo "startlinux nfs <NFS-IP-ADDR> <NFS-PATH>" echo Example startlinux nfs 192.168.0.2 /usr/src/gxlinux/rootfs exit # # NO_NFSPATH: echo Cannot find NFS server path, check your \$NFSPATH variable echo "startlinux nfs <NFS-IP-ADDR> <NFS-PATH>" echo Example startlinux nfs 192.168.0.2 /usr/src/gxlinux/rootfs exit -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
