/* mmap: only for xsd_kva */
paddr_t
xenevtmmap(dev_t dev, off_t off, int prot)
{
if (minor(dev) == DEV_XSD) {
/* only one page, so off is always 0 */
if (off != 0)
return -1;
return x86_btop(
xpmap_mtop((paddr_t)xen_start_info.store_mfn << PAGE_SHIFT));
}
return -1;
}
paddr_t
mmmmap(dev_t dev, off_t off, int prot)
{
/*
* /dev/mem is the only one that makes sense through this
* interface. For /dev/kmem any physaddr we return here
* could be transient and hence incorrect or invalid at
* a later time. /dev/null just doesn't make any sense
* and /dev/zero is a hack that is handled via the default
* pager in mmap().
*/
if (minor(dev) != DEV_MEM)
return (-1);
if (check_pa_acc(off, prot) != 0)
return (-1);
return (x86_btop(off));
}
