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
Thepmap_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
AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>.