Questions on newbus...

[M. Warner Losh]

In message: <200305160121.h4G1LkPS036046 at spoon.beta.com>
            "Brian J. McGovern" <mcgovern at beta.com> writes:
: Now, I haven't done a lot of testing with the actual hardware (I haven't
: updated the initialization code yet), but I'm assuming that these 
: bus_space_read() calls should give me physical address locations... In 4.x
: (and earlier), the routines for allocating the resources would provide both
: physical and virtual addresses. 

Use bus_space_read() and you'll be fine.

: If I'm on track, how would I then properly convert these physical addresses
: to usable virtual addresses?

You don't have to worry abou tit.

: If I'm off track (and I somehow expect I am), can someone take a few minutes
: and coach me on how to read the PCI configuration registers, and get my
: two memory windows mapped so I can start bit-banging the hardware? :)

	res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
				 0ul, ~0ul, size, RF_ACTIVE);
	bt = rman_get_bustag(res);
	bh = rman_get_bushandle(res);

(you do this a second time for the other window).

	reg = bus_space_read_4(bt, bh, SOME_REGISTER);
	reg |= SR_ENABLE;
	bus_space_write_4(bt, bh, SOME_REGISTER, reg);

Warner