pio_andb_rmw(D3X)pio_andb_rmw(D3X)NAMEpio_andb_rmw - byte I/O-bus read-modify-write cycle routines
SYNOPSIS
pio_andb_rmw(piomap_t *piomap, iopaddr_t iopaddr, unsigned char mask);
DESCRIPTIONpio_andb_rmw performs an atomic I/O-bus read-modify-write operation. This
function reads a byte from the address given by the iopaddr argument. The
function then ANDs the byte, with the mask specified by mask, and writes
the result to the address, iopaddr. 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_andh_rmw(D3X), pio_andw_rmw(D3X)
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