| PMAP_MAP(9) | Kernel Developer's Manual | PMAP_MAP(9) |
pmap_map — map a
physical memory range into kernel virtual address (KVA) space
#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);
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.
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.
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.
This manual page was written by Bruce M Simpson <bms@spc.org>.
| July 21, 2003 | Debian |