void
init_gnttab(void)
{
struct gnttab_setup_table setup;
unsigned long frames[NR_GRANT_FRAMES];
int i;
#ifdef GNT_DEBUG
memset(inuse, 1, sizeof(inuse));
#endif
for (i = NR_RESERVED_ENTRIES; i < NR_GRANT_ENTRIES; i++)
put_free_entry(i);
if (!xen_feature(XENFEAT_auto_translated_physmap)) {
setup.dom = DOMID_SELF;
setup.nr_frames = NR_GRANT_FRAMES;
set_xen_guest_handle(setup.frame_list, frames);
HYPERVISOR_grant_table_op(GNTTABOP_setup_table, &setup, 1);
gnttab_table = map_frames(frames, NR_GRANT_FRAMES);
}
else {
struct xen_add_to_physmap xatp;
i = NR_GRANT_FRAMES - 1;
/* map_frames works differently if p2m is autotranslated,
* in that gnttab_table are just mapped with vaddrs that are the same as
* paddrs by mini-os itself, and provided to Xen for p2m mapping */
gnttab_table = map_frames(NULL, NR_GRANT_FRAMES);
for(i = NR_GRANT_FRAMES - 1; i >= 0; i--) {
xatp.domid = DOMID_SELF;
xatp.idx = i;
xatp.space = XENMAPSPACE_grant_table;
xatp.gpfn =
virt_to_pfn((unsigned long)gnttab_table + (i << PAGE_SHIFT));
if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp) != 0) {
printk("grant table add_to_physmap failed\n");
break;
}
}
}
printk("gnttab_table mapped at %p.\n", gnttab_table);
}
/* Initialise grant tables and map machine frames to a VA */
CAMLprim value
caml_gnttab_init(value unit)
{
struct gnttab_setup_table setup;
unsigned long frames[NR_GRANT_FRAMES];
setup.dom = DOMID_SELF;
setup.nr_frames = NR_GRANT_FRAMES;
set_xen_guest_handle(setup.frame_list, frames);
HYPERVISOR_grant_table_op(GNTTABOP_setup_table, &setup, 1);
gnttab_table = map_frames(frames, NR_GRANT_FRAMES);
printk("gnttab_table mapped at %p\n", gnttab_table);
return Val_unit;
}
void
init_gnttab(void)
{
struct gnttab_setup_table setup;
unsigned long frames[NR_GRANT_FRAMES];
int i;
#ifdef GNT_DEBUG
memset(inuse, 1, sizeof(inuse));
#endif
for (i = NR_RESERVED_ENTRIES; i < NR_GRANT_ENTRIES; i++)
put_free_entry(i);
setup.dom = DOMID_SELF;
setup.nr_frames = NR_GRANT_FRAMES;
set_xen_guest_handle(setup.frame_list, frames);
HYPERVISOR_grant_table_op(GNTTABOP_setup_table, &setup, 1);
gnttab_table = map_frames(frames, NR_GRANT_FRAMES);
printk("gnttab_table mapped at %p.\n", gnttab_table);
}
