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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.