mmap()

[Hans Petter Selasky]

On Wed, Dec 08, 2004 at 01:05:04AM -0800, John-Mark Gurney wrote:
> Kamal R. Prasad wrote this message on Wed, Dec 08, 2004 at 10:45 +0530:
> > Wilko Bulte wrote:
> > 
> > >On Tue, Dec 07, 2004 at 02:19:19PM -0800, John-Mark Gurney wrote..
> > >
> > >>Kamal R. Prasad wrote this message on Tue, Dec 07, 2004 at 22:21 +0530:
> > >>
> > >>>There was a bug in my  interface routine which probably resulted in too 
> > >>>many calls.
> > >>>Something like *paddr=vtophys(base) instead of 
> > >>>*paddr=vtophys(base+offset) should result in lots of calls to the 
> > >>>interface.
> > >>>
> > >>Just remeber that vtophys is not a supported interface in HEAD, (if it
> > >>still works, it will probably be removed shortly).. Also, vtophys only
> > >>works on limited archs, like i386 and alpha...
> > >
> > >s/limited/some/
> >
> > So what would be the equivalent supported interface in HEAD?
> 
> bus_dma(9)  It's a bit more complicated though...

Why is there not a simple interface to it? I'd suggest something like: 

void *
xxx_alloc_mem(u_int32_t size, u_int8_t align_power);

u_int32_t
xxx_vtophys(void *ptr, u_int32_t size);

void
xxx_free_mem(void *ptr, u_int32_t size);

Yours
-HPS