There have been a lot of questions about RAM Disks and I am aware of ramfs and tmpfs which allow the use of ram as a block device. However my interest is in using a fixed memory address range as a block device.
This arises from the necessity to use non-volatile RAM available in my system. I have 6GB of RAM available, and 8GB of non-volatile RAM present. The output of /proc/iomem gives me the following
100000000-17fffffff : System RAM
180000000-37fffffff : reserved
Here the region from 6GB to 14GB corresponds to the Non-volatile RAM region which is marked by the E820 BIOS memory map as reserved. My main intention is to use this NVRAM as a block device in linux. This is useful for testing NVRAM systems. Is there any linux command already present which would allow me to use this region as a block device, or do I have to write my own kernel device driver to facilitate the same?