PMAP_MAP(9) FreeBSD Kernel Developer's Manual PMAP_MAP(9)
NAME
pmap_map - map a physical memory range into kernel virtual address (KVA)
space
SYNOPSIS
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/pmap.h>
vm_offset_t
pmap_map(vm_offset_t *virt, vm_paddr_t start, vm_paddr_t end, int prot);
DESCRIPTION
The pmap_map() function maps a range of physical addresses into kernel
virtual address (KVA) space, from start to end, with protection bits
prot.
The value passed in *virt is treated as a hint for the virtual address of
the beginning of the mapping.
IMPLEMENTATION NOTES
The prot argument is currently ignored by machine-dependent
implementations.
Architectures which can support a direct mapped physical to virtual
region can return the appropriate address within that region, leaving
*virt unchanged.
RETURN VALUES
The pmap_map() function returns the virtual address of the beginning of
the mapping, if the mapping was successfully made; *virt will also be
updated with the first usable address after the mapped region.
If the function is unsuccessful, NULL is returned.
SEE ALSO
pmap(9)
AUTHORS
This manual page was written by Bruce M Simpson <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 July 21, 2003 FreeBSD 14.1-RELEASE-p8