trusty (9) pmap_map.9freebsd.gz

Provided by: freebsd-manpages_9.2+1-1_all bug

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>.