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nova: add support to specify dma mapping flag

This commit is contained in:
Alexander Boettcher 2013-01-25 16:26:23 +01:00 committed by Norman Feske
parent 5380c09c6f
commit 1c2f76cd2a
1 changed files with 11 additions and 3 deletions
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14
base-nova/include/nova/syscall-generic.h
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@ -472,11 +472,13 @@ namespace Nova {
bool append_item(Crd crd, mword_t sel_hotspot,
bool kern_pd = false,
bool update_guest_pt = false,
bool translate_map = false)
bool translate_map = false,
bool dma_mem = false)
{
/* transfer items start at the end of the UTCB */
items += 1 << 16;
Item *item = reinterpret_cast<Item *>(this) + (PAGE_SIZE_BYTE / sizeof(struct Item)) - (items >> 16);
Item *item = reinterpret_cast<Item *>(this);
item += (PAGE_SIZE_BYTE / sizeof(struct Item)) - (items >> 16);
/* check that there is enough space left on UTCB */
if (msg + msg_words() >= reinterpret_cast<mword_t *>(item)) {
@ -490,7 +492,13 @@ namespace Nova {
/* update guest page table */
unsigned g = update_guest_pt ? (1 << 10) : 0;
item->hotspot = crd.hotspot(sel_hotspot) | g | h | (translate_map ? 2 : 1);
/* mark memory dma able */
unsigned d = dma_mem ? (1 << 9) : 0;
/* set type of delegation, either 'map' or 'translate and map' */
unsigned m = translate_map ? 2 : 1;
item->hotspot = crd.hotspot(sel_hotspot) | g | h | d | m;
item->crd = crd.value();
return true;