RFS on NVRAM (RTEMS 4.10.1)

[Chris Johns]

On 31/01/12 7:13 PM, VIRAL SHAH wrote:
>
> Hi All,
>
> When we try to mount the RFS on a NVRAM having non 0xFF data it crashes. We cannot see any error on MMI but the CPU gives bus exception indicating the software is trying to write to a write protected location.
>
>
> We use the below configuration and have 256KB of NVRAM(actually SRAM).
>
> const rtems_nvdisk_config rtems_nvdisk_configuration[] =
> {
>    {
>      block_size:         NVRAMDISK_BLOCK_SIZE, //512
>      device_count:       1,
>      devices:&rtems_nv_heap_device_descriptor[0],
>      flags:              0,
>      info_level:         0
>    }
> };
>
> If we manually intialize the NVRAM first with 0XFF and then mount RFS it works without any problem. Can anyone please guide us how to fix this problem?
>

What commands do you use to set up the NVRAM disk ?

The RFS defaults to 0xff so if you are erasing and formatting the disk 
correctly this would point to an initialisation type bug.

Chris