static void put_l2_table(arch_aspace_t *aspace, uint32_t l1_index, paddr_t l2_pa)
{
DEBUG_ASSERT(aspace);
/* check if any l1 entry points to this l2 table */
for (uint i = 0; i < L1E_PER_PAGE; i++) {
uint32_t tt_entry = aspace->tt_virt[ROUNDDOWN(l1_index, L1E_PER_PAGE) + i];
if ((tt_entry & MMU_MEMORY_L1_DESCRIPTOR_MASK)
== MMU_MEMORY_L1_DESCRIPTOR_PAGE_TABLE) {
return;
}
}
/* we can free this l2 table */
vm_page_t *page = paddr_to_vm_page(l2_pa);
if (!page)
panic("bad page table paddr 0x%lx\n", l2_pa);
/* verify that it is in our page list */
DEBUG_ASSERT(list_in_list(&page->node));
list_delete(&page->node);
LTRACEF("freeing pagetable at 0x%lx\n", l2_pa);
pmm_free_page(page);
}
static void dt_entry_list_delete(struct dt_entry_node *dt_node_member)
{
if (list_in_list(&dt_node_member->node)) {
list_delete(&dt_node_member->node);
free(dt_node_member->dt_entry_m);
free(dt_node_member);
}
}
void PagerSource::SwapRequest(page_request_t* old, page_request_t* new_req) {
Guard<fbl::Mutex> guard{&mtx_};
ASSERT(!closed_);
if (list_in_list(&old->node)) {
list_replace_node(&old->node, &new_req->node);
} else if (old == active_request_) {
active_request_ = new_req;
}
}
void timer_delete(timer_list_t *timer)
{
enter_critical_section();
if (list_in_list(&timer->node)) {
list_delete(&timer->node);
}
exit_critical_section();
}
void PagerSource::ClearAsyncRequest(page_request_t* request) {
Guard<fbl::Mutex> guard{&mtx_};
ASSERT(!closed_);
if (request == active_request_) {
// Condition on whether or not we atually cancel the packet, to make sure
// we don't race with a call to PagerSource::Free.
if (port_->CancelQueued(&packet_)) {
OnPacketFreedLocked();
}
} else if (list_in_list(&request->node)) {
list_delete(&request->node);
}
}
bool timer_pending(const timer_list_t *timer)
{
return list_in_list(&timer->node);
}
