hwcpin(D3X)

NAME
     hwcpin - copy data from I/O devices using 16-bit reads

SYNOPSIS
     #include "sys/types.h"
     #include <sys/systm.h>

     hwcpin(volatile unsigned short *from, caddr_t to, int num_bytes);

DESCRIPTION
     hwcpin efficiently copies data from device memory to main memory using
     16-bit reads only.

     hwcpin is similar to bcopy(D3) in that it does not verify the
     accessibility of the memory before attempting the transfer.  However,
     bcopy attempts to optimize for speed, and can generate 32-bit and 64-bit
     reads.

     When the device is mapped using a PIO map created with pio_mapalloc(D3X),
     use pio_bcopyin(D3X), which allows you to specify the transfer unit size.

   Return Values
     None

   See Also
     bcopy(D3), hwcpout(D3X), pio_bcopyin(D3X).