MEM(4) OpenBSD Programmer's Manual (Zaurus) MEM(4)NAME
mem, kmem - memory files
DESCRIPTION
The special file /dev/mem is an interface to the physical memory of the
computer. Byte offsets in this file are interpreted as physical memory
addresses. Reading and writing this file is equivalent to reading and
writing memory itself. Only offsets within the bounds of /dev/mem are
allowed.
Kernel virtual memory is accessed through the interface /dev/kmem in the
same manner as /dev/mem. Only kernel virtual addresses that are
currently mapped to memory are allowed.
On zaurus, physical memory is contiguous. The kernel virtual memory
begins at address 0xc0000000.
Writeability of these devices is controlled by the system securelevel(7).
FILES
/dev/mem
/dev/kmem
SEE ALSOsecurelevel(7)HISTORY
The /dev/mem and /dev/kmem files appeared in Version 6 AT&T UNIX.
OpenBSD 4.9 May 31, 2007 OpenBSD 4.9