SQ_REMAP(9) Memory Management SQ_REMAP(9)NAME
sq_remap - Map a physical address through the Store Queues
SYNOPSIS
unsigned long sq_remap(unsigned long phys, unsigned int size, const char * name, pgprot_t prot);
ARGUMENTS
phys
Physical address of mapping.
size
Length of mapping.
name
User invoking mapping.
prot
Protection bits.
DESCRIPTION
Remaps the physical address phys through the next available store queue address of size length. name is logged at boot time as well as
through the sysfs interface.
AUTHOR
Paul Mundt <lethal@linux-sh.org>
Author.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SQ_REMAP(9)
Check Out this Related Man Page
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)
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