pio_wbadaddr(D3X)pio_wbadaddr(D3X)NAMEpio_wbadaddr - test for valid output bus address
pio_wbadaddr_val - test for valid output bus address and write value
SYNOPSIS
#include <sys/types.h>
#include <sys/ddi.h>
#include <sys/pio.h>
int pio_wbadaddr(piomap_t *piomap, iopaddr_t iopaddr, int size);
int pio_wbadaddr_val (piomap_t *piomap, iopaddr_t iopaddr, int size, int val);
Arguments
piomap
A PIO map returned from pio_mapalloc(D3X).
iopaddr
The I/O bus address to be probed.
size The size in bytes to use in probing the I/O bus: 1, 2, or 4.
val A value to be written to iopaddr (cast to int when size is 1 or 2).
DESCRIPTION
Typically these functions are called from a I/O bus device driver's
init(D2) or edtinit(D2) function to determine whether a device is present
in the system.
Call pio_wbadaddr to determine whether you can write to location iopaddr.
The value written to the test location is binary zero of the specified
size.
Call pio_wbadaddr_val when you also want to specify the data to be
written.
Use pio_badaddr(D3X) to test a bus address for input only.
NOTES
If an invalid size is passed a system panic results.
It is possible that the pio_wbadaddr_val(D3X) function may change or be
removed in the future.
These routines may not be called from an interrupt handler, or routines
that may be called from an interrupt handler.
Return Values
Both functions return 0 when the address is writeable, and 1 when it is
not.
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pio_wbadaddr(D3X)pio_wbadaddr(D3X)
See Also
pio_badaddr(D3X), pio_bcopyout(D3X), pio_mapalloc(D3X).
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