pmap_map9
Map a physical memory range into kernel virtual address (kva) space
Usage
#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);
Overview
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.