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pmap_map.9freebsd

BSD mandoc

NAME

pmap_map - map a physical memory range into kernel virtual address (KVA) space

SYNOPSIS

In 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  

DESCRIPTION

The 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 NOTES

The 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 VALUES

The 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.

SEE ALSO

pmap(9)

AUTHORS

This manual page was written by An Bruce M Simpson Aq bms@spc.org .