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 ⟨bms@spc.org⟩.