actually the TS-NVRAM2 is paged or linear depending on how you
initialize the board.
Look at the Software tab:
http://www.embeddedarm.com/products/board-detail.php?product=TS-NVRAM2#
Look at page 8 of:
http://www.embeddedarm.com/documentation/ts-nvram2-manual.pdf
jason wrote:
>
>
> Hello Frank,
>
> Thanks for the tip. Howver, TS-NVRAM2 is a paged RAM, not linear.
>
> Jason
>
> --- On *Mon, 11/17/08, Frank /<>/* wrote:
>
> From: Frank <>
> Subject: Re: [ts-7000] TS-NVRAM2 ram drive
> To:
> Date: Monday, November 17, 2008, 5:36 PM
>
> Hi Jason,
>
> The key is the slram or phram kernel modules. You didn't mention
> which board and kernel you're using, so you'll have to fit what I
> say here into your configuration.
>
> The short version is:
>
> modprobe slram map=VRAM,0xec800000 ,+0x100000
>
> Where the 2nd parm is the address of the NVRAM, and the third is the
> length.
>
> I have the 2M RAM of the TS-DIO64 configured as a NV RAM disk on my
> TS-7800. That configuration is using a 2.6 kernel, and at the time
> I had to compile the kernel modules from the source.
>
> Here's a overly commented shell script I use to configure the RAM as
> a disk. As I mentioned above, you'll have to pick and choose the
> pieces relative to your configuration, but hopefully this can get
> you started.
>
> Good luck!
>
> -Frank
> Holland, PA
>
> ============ ========= ========= ========= ====
> # Setting up a permanent RAM disk
> # TS-DIO64 on a TS-7800
>
> export PATH=$PATH:/ initrd/usr/ bin
>
> # Set ISA Bus
> peekpoke 32 0xe8000030 0x55555555
> peekpoke 32 0xe8000034 0x55555555
> peekpoke 32 0xe8000038 0x55555555
> peekpoke 32 0xe800003c 0x55555555
>
> # Check for DIO-64 - Must be 0xA4
> id=`peekpoke 8 0xee000100`
>
> # Enable RAM @ 0xec800000
> peekpoke 8 0xee000102 0x10
>
> # NAND Driver must be loaded first
> modprobe ts7800
>
> # Load slram module
> modprobe slram map=VRAM,0xec800000 ,+0x100000
>
> # Check for module load
> dmesg
>
> # Output of dmesg should be something like this
> # slram: devname=VRAM, devstart=0xec800000 , devlength=0x100000
> # slram: Registered device VRAM from 3874816KiB to 3875840KiB
> # slram: Mapped from 0xc8a00000 to 0xc8b00000
>
> # Check the new device name
> cat /proc/mtd
>
> # Output of the above command should be something like this
> # dev: size erasesize name
> # mtd0: 20000000 00020000 "whole chip"
> # mtd1: 00400000 00020000 "kernel"
> # mtd2: 00400000 00020000 "initrd"
> # mtd3: 1f7e0000 00020000 "rootfs"
> # mtd4: 00100000 00004000 "VRAM" <-- This is the new device
>
> # Let udev make the new devices
> # May need to check if udev is running first
> # /etc/init.d/ udev start
>
> # Output should be something like this.
> # Starting the hotplug events dispatcher: udevd.
> # Synthesizing the initial hotplug events...done.
> # Waiting for /dev to be fully populated... done.
>
> # Make a mount point (bbr = Battery Backed RAM)
> mp=/opt/bbr
>
> if [ ! -d $mp ]
> then
> mkdir $mp
> fi
>
> # Make the filesystem
> # Do this only the first time!!!!!!!! !
> # or if the -fs flag is passed on the command line
> if [ $# -eq 2 ]
> then
> if [ "$1" = "-fs" ]
> then
> echo "Making filesystem on /dev/mtdblock4. .."
> mkfs /dev/mtdblock4 -t ext2
> fi
> fi
>
> # Mount the filesystem
> mount /dev/mtdblock4 $mp -t ext2
>
> ============ ========= ========= ========= ===
>
> jason95014 wrote:
>
>> Hello,
>>
>> Does anyone know if there is a driver written?
>> Or, is there a way to configure the kernel to use it as RAM drive?
>>
>> Thanks in advance.
>>
>> Jason
>>
>
>
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