Copyright (c) 2003 Bruce M Simpson <firstname.lastname@example.org> All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documenta...
NAMEpmap_map - map a physical memory range into kernel virtual address (KVA) space
SYNOPSISIn sys/param.h In vm/vm.h In vm/pmap.h Ft vm_offset_t Fo pmap_map Fa vm_offset_t *virt vm_paddr_t start vm_paddr_t end int prot Fc
DESCRIPTIONThe Fn pmap_map function maps a range of physical addresses into kernel virtual address (KVA) space, from Fa start to Fa end , with protection bits Fa prot .
The value passed in Fa *virt is treated as a hint for the virtual address of the beginning of the mapping.
IMPLEMENTATION NOTESThe Fa 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 Fa *virt unchanged.
RETURN VALUESThe Fn pmap_map function returns the virtual address of the beginning of the mapping, if the mapping was successfully made; Fa *virt will also be updated with the first usable address after the mapped region.
If the function is unsuccessful, NULL is returned.