pio_andw_rmw(D3X)

NAME
     pio_andw_rmw - word I/O-bus read-modify-write cycle routines

SYNOPSIS
     pio_andw_rmw(piomap_t *piomap, iopaddr_t pioaddr, unsigned long mask);

DESCRIPTION
     pio_andw_rmw perform an atomic I/O-bus read-modify-write operation. This
     function reads a word from the address given by the pioaddr argument. The
     function then ANDs the word with the mask specified by mask, and writes
     the result to the address, pioaddr. To prevent any other I/O-bus cycles
     during this operation, this function locks the I/O bus. piomap is the PIO
     map returned from pio_mapalloc(D3X).

   Note
     The address must be correctly aligned for the given transfer.

   See Also
     pio_orb_rmw(D3X), pio_andb_rmw(D3X), pio_andh_rmw(D3X)