NAME
mem,
kmem —
Sun main
memory access driver
DESCRIPTION
The 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. An error will be returned if an attempt is made to reference an
offset outside of
/dev/mem.
Kernel virtual memory is accessed via the file
/dev/kmem in
the same manner as
/dev/mem. Only kernel virtual addresses
that are currently mapped to memory are allowed.
SPARC
On the SPARC, physical memory may be discontiguous; kernel virtual memory begins
at
0xf0000000
.
FILES
- /dev/mem
-
- /dev/kmem
-
HISTORY
The files
mem and
kmem appeared in
Version 6 AT&T UNIX.