MirOS Manual: kmem(4), mem(4)

MEM(4)                 BSD Programmer's Manual (SPARC)                  MEM(4)

NAME

     mem, kmem - memory files

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 0xf8000000.

     Writeability of these devices is controlled by the system securelevel(7).

FILES

     /dev/mem
     /dev/kmem

SEE ALSO

     securelevel(7)

HISTORY

     The /dev/mem and /dev/kmem files appeared in Version 6 AT&T UNIX.

MirOS BSD #10-current            June 5, 1993                                1

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