lock(2) [bsd man page]

LOCK(2) 							System Calls Manual							   LOCK(2)

NAME

       lock - lock a process in primary memory (2BSD)

SYNOPSIS

       lock(flag)
       int flag

DESCRIPTION

       If  the	flag  argument is non-zero, the process executing this call will not be swapped unless it is required to grow.	If the argument is
       zero, the process is unlocked.  This call may only be executed by the super-user.

ERRORS

       [EPERM]	      The caller is not the super-user.

BUGS

       Locked processes interfere with the compaction of primary memory and can cause deadlock.  This system call is not  considered  a  permanent
       part of the system.

       Lock is unique to the PDP-11 and 2BSD; its use is discouraged.

3rd Berkeley Distribution					 January 22, 1987							   LOCK(2)

PHYS(2) 							System Calls Manual							   PHYS(2)

NAME

       phys - allow a process to access physical addresses (2BSD)

SYNOPSIS

       phys(segreg, size, physaddr)
       unsigned int segreg, size, physaddr;

DESCRIPTION

       The  argument  segreg specifies a process virtual (data-space) address range of 8K bytes starting at virtual address segregx8K bytes.  This
       address range is mapped into physical address physaddrx64 bytes.  Only the first sizex64 bytes of this mapping is addressable.  If size	is
       zero, any previous mapping of this virtual address range is nullified.  For example, the call

	    phys(7, 1, 0177775);

       will  map  virtual  addresses  0160000-0160077  into physical addresses 017777500-017777577.  In particular, virtual address 0160060 is the
       PDP-11 console located at physical address 017777560.

       This call may only be executed by the super-user.

ERRORS

       [EPERM]	      The process's effective user ID is not the super-user.

       [EINVAL]       Segreg is less than 0 or greater than 7.

       [EINVAL]       Size is less than 0 or greater than 128.

SEE ALSO

       PDP-11 segmentation hardware

BUGS

       On systems with ENABLE/34(tm) memory mapping boards, phys cannot be used to map in the I/O page.

       This system call is very dangerous.  It is not considered a permanent part of the system.

       Phys is unique to the PDP-11 and 2BSD; its use is discouraged.

3rd Berkeley Distribution					 January 22, 1987							   PHYS(2)