pio_andw_rmw(D3X)pio_andw_rmw(D3X)NAMEpio_andw_rmw - word I/O-bus read-modify-write cycle routines
SYNOPSIS
pio_andw_rmw(piomap_t *piomap, iopaddr_t pioaddr, unsigned long mask);
DESCRIPTIONpio_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)
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