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.

AUTHORS

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