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kern: switch->nx, implement sleep manager init

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This commit is contained in:
Michael Scire 2020-02-14 19:58:57 -08:00
parent 20b5268e90
commit 2c496e94d5
31 changed files with 378 additions and 59 deletions
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46
libraries/libmesosphere/source/arch/arm64/kern_k_page_table_impl.cpp
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@ -20,11 +20,55 @@ namespace ams::kern::arch::arm64 {
void KPageTableImpl::InitializeForKernel(void *tb, KVirtualAddress start, KVirtualAddress end) {
this->table = static_cast<L1PageTableEntry *>(tb);
this->is_kernel = true;
this->num_entries = util::AlignUp(end - start, AddressSpaceSize) / AddressSpaceSize;
this->num_entries = util::AlignUp(end - start, L1BlockSize) / L1BlockSize;
}
L1PageTableEntry *KPageTableImpl::Finalize() {
return this->table;
}
bool KPageTableImpl::GetPhysicalAddress(KPhysicalAddress *out, KProcessAddress address) const {
/* Validate that we can read the actual entry. */
const size_t l0_index = GetL0Index(address);
const size_t l1_index = GetL1Index(address);
if (this->is_kernel) {
/* Kernel entries must be accessed via TTBR1. */
if ((l0_index != MaxPageTableEntries - 1) || (l1_index < MaxPageTableEntries - this->num_entries)) {
return false;
}
} else {
/* User entries must be accessed with TTBR0. */
if ((l0_index != 0) || l1_index >= this->num_entries) {
return false;
}
}
/* Try to get from l1 table. */
const L1PageTableEntry *l1_entry = this->GetL1Entry(address);
if (l1_entry->IsBlock()) {
*out = l1_entry->GetBlock() + GetL1Offset(address);
return true;
} else if (!l1_entry->IsTable()) {
return false;
}
/* Try to get from l2 table. */
const L2PageTableEntry *l2_entry = this->GetL2Entry(l1_entry, address);
if (l2_entry->IsBlock()) {
*out = l2_entry->GetBlock() + GetL2Offset(address);
return true;
} else if (!l2_entry->IsTable()) {
return false;
}
/* Try to get from l3 table. */
const L3PageTableEntry *l3_entry = this->GetL3Entry(l2_entry, address);
if (l3_entry->IsBlock()) {
*out = l3_entry->GetBlock() + GetL3Offset(address);
return true;
}
return false;
}
}