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kern: start KPageTable(Impl) refactor, use array-with-levels for KPageTableImpl
This commit is contained in:
Michael Scire
SciresM
parent
7aa0bed869
commit
02e837d82e
3 changed files with 205 additions and 230 deletions
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@ -33,103 +33,98 @@ namespace ams::kern::arch::arm64 {
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return m_table;
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}
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bool KPageTableImpl::ExtractL3Entry(TraversalEntry *out_entry, TraversalContext *out_context, const L3PageTableEntry *l3_entry, KProcessAddress virt_addr) const {
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/* Set the L3 entry. */
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out_context->l3_entry = l3_entry;
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if (l3_entry->IsBlock()) {
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/* Set the output entry. */
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out_entry->phys_addr = l3_entry->GetBlock() + (virt_addr & (L3BlockSize - 1));
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if (l3_entry->IsContiguous()) {
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out_entry->block_size = L3ContiguousBlockSize;
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} else {
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out_entry->block_size = L3BlockSize;
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}
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out_entry->sw_reserved_bits = l3_entry->GetSoftwareReservedBits();
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out_entry->attr = 0;
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return true;
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} else {
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out_entry->phys_addr = Null<KPhysicalAddress>;
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out_entry->block_size = L3BlockSize;
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out_entry->sw_reserved_bits = 0;
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out_entry->attr = 0;
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return false;
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}
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}
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bool KPageTableImpl::ExtractL2Entry(TraversalEntry *out_entry, TraversalContext *out_context, const L2PageTableEntry *l2_entry, KProcessAddress virt_addr) const {
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/* Set the L2 entry. */
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out_context->l2_entry = l2_entry;
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if (l2_entry->IsBlock()) {
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/* Set the output entry. */
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out_entry->phys_addr = l2_entry->GetBlock() + (virt_addr & (L2BlockSize - 1));
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if (l2_entry->IsContiguous()) {
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out_entry->block_size = L2ContiguousBlockSize;
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} else {
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out_entry->block_size = L2BlockSize;
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}
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out_entry->sw_reserved_bits = l2_entry->GetSoftwareReservedBits();
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out_entry->attr = 0;
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/* Set the output context. */
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out_context->l3_entry = nullptr;
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return true;
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} else if (l2_entry->IsTable()) {
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return this->ExtractL3Entry(out_entry, out_context, this->GetL3EntryFromTable(GetPageTableVirtualAddress(l2_entry->GetTable()), virt_addr), virt_addr);
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} else {
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out_entry->phys_addr = Null<KPhysicalAddress>;
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out_entry->block_size = L2BlockSize;
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out_entry->sw_reserved_bits = 0;
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out_entry->attr = 0;
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out_context->l3_entry = nullptr;
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return false;
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}
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}
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bool KPageTableImpl::ExtractL1Entry(TraversalEntry *out_entry, TraversalContext *out_context, const L1PageTableEntry *l1_entry, KProcessAddress virt_addr) const {
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/* Set the L1 entry. */
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out_context->l1_entry = l1_entry;
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if (l1_entry->IsBlock()) {
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/* Set the output entry. */
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out_entry->phys_addr = l1_entry->GetBlock() + (virt_addr & (L1BlockSize - 1));
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if (l1_entry->IsContiguous()) {
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out_entry->block_size = L1ContiguousBlockSize;
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} else {
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out_entry->block_size = L1BlockSize;
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}
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out_entry->sw_reserved_bits = l1_entry->GetSoftwareReservedBits();
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/* Set the output context. */
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out_context->l2_entry = nullptr;
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out_context->l3_entry = nullptr;
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return true;
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} else if (l1_entry->IsTable()) {
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return this->ExtractL2Entry(out_entry, out_context, this->GetL2EntryFromTable(GetPageTableVirtualAddress(l1_entry->GetTable()), virt_addr), virt_addr);
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} else {
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out_entry->phys_addr = Null<KPhysicalAddress>;
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out_entry->block_size = L1BlockSize;
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out_entry->sw_reserved_bits = 0;
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out_entry->attr = 0;
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out_context->l2_entry = nullptr;
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out_context->l3_entry = nullptr;
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return false;
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}
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}
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// bool KPageTableImpl::ExtractL3Entry(TraversalEntry *out_entry, TraversalContext *out_context, const L3PageTableEntry *l3_entry, KProcessAddress virt_addr) const {
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// /* Set the L3 entry. */
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// out_context->l3_entry = l3_entry;
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//
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// if (l3_entry->IsBlock()) {
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// /* Set the output entry. */
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// out_entry->phys_addr = l3_entry->GetBlock() + (virt_addr & (L3BlockSize - 1));
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// if (l3_entry->IsContiguous()) {
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// out_entry->block_size = L3ContiguousBlockSize;
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// } else {
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// out_entry->block_size = L3BlockSize;
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// }
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// out_entry->sw_reserved_bits = l3_entry->GetSoftwareReservedBits();
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// out_entry->attr = 0;
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//
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// return true;
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// } else {
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// out_entry->phys_addr = Null<KPhysicalAddress>;
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// out_entry->block_size = L3BlockSize;
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// out_entry->sw_reserved_bits = 0;
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// out_entry->attr = 0;
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// return false;
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// }
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// }
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//
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// bool KPageTableImpl::ExtractL2Entry(TraversalEntry *out_entry, TraversalContext *out_context, const L2PageTableEntry *l2_entry, KProcessAddress virt_addr) const {
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// /* Set the L2 entry. */
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// out_context->l2_entry = l2_entry;
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//
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// if (l2_entry->IsBlock()) {
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// /* Set the output entry. */
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// out_entry->phys_addr = l2_entry->GetBlock() + (virt_addr & (L2BlockSize - 1));
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// if (l2_entry->IsContiguous()) {
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// out_entry->block_size = L2ContiguousBlockSize;
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// } else {
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// out_entry->block_size = L2BlockSize;
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// }
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// out_entry->sw_reserved_bits = l2_entry->GetSoftwareReservedBits();
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// out_entry->attr = 0;
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//
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// /* Set the output context. */
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// out_context->l3_entry = nullptr;
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// return true;
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// } else if (l2_entry->IsTable()) {
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// return this->ExtractL3Entry(out_entry, out_context, this->GetL3EntryFromTable(GetPageTableVirtualAddress(l2_entry->GetTable()), virt_addr), virt_addr);
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// } else {
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// out_entry->phys_addr = Null<KPhysicalAddress>;
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// out_entry->block_size = L2BlockSize;
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// out_entry->sw_reserved_bits = 0;
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// out_entry->attr = 0;
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//
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// out_context->l3_entry = nullptr;
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// return false;
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// }
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// }
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//
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// bool KPageTableImpl::ExtractL1Entry(TraversalEntry *out_entry, TraversalContext *out_context, const L1PageTableEntry *l1_entry, KProcessAddress virt_addr) const {
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// /* Set the L1 entry. */
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// out_context->level_entries[EntryLevel_L1] = l1_entry;
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//
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// if (l1_entry->IsBlock()) {
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// /* Set the output entry. */
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// out_entry->phys_addr = l1_entry->GetBlock() + (virt_addr & (L1BlockSize - 1));
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// if (l1_entry->IsContiguous()) {
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// out_entry->block_size = L1ContiguousBlockSize;
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// } else {
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// out_entry->block_size = L1BlockSize;
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// }
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// out_entry->sw_reserved_bits = l1_entry->GetSoftwareReservedBits();
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//
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// /* Set the output context. */
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// out_context->l2_entry = nullptr;
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// out_context->l3_entry = nullptr;
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// return true;
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// } else if (l1_entry->IsTable()) {
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// return this->ExtractL2Entry(out_entry, out_context, this->GetL2EntryFromTable(GetPageTableVirtualAddress(l1_entry->GetTable()), virt_addr), virt_addr);
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// } else {
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// out_entry->phys_addr = Null<KPhysicalAddress>;
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// out_entry->block_size = L1BlockSize;
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// out_entry->sw_reserved_bits = 0;
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// out_entry->attr = 0;
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//
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// out_context->l2_entry = nullptr;
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// out_context->l3_entry = nullptr;
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// return false;
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// }
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// }
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bool KPageTableImpl::BeginTraversal(TraversalEntry *out_entry, TraversalContext *out_context, KProcessAddress address) const {
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/* Setup invalid defaults. */
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out_entry->phys_addr = Null<KPhysicalAddress>;
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out_entry->block_size = L1BlockSize;
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out_entry->sw_reserved_bits = 0;
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out_entry->attr = 0;
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out_context->l1_entry = m_table + m_num_entries;
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out_context->l2_entry = nullptr;
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out_context->l3_entry = nullptr;
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*out_entry = {};
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*out_context = {};
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/* Validate that we can read the actual entry. */
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const size_t l0_index = GetL0Index(address);
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@ -146,125 +141,79 @@ namespace ams::kern::arch::arm64 {
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}
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}
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/* Extract the entry. */
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const bool valid = this->ExtractL1Entry(out_entry, out_context, this->GetL1Entry(address), address);
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/* Get the L1 entry, and check if it's a table. */
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out_context->level_entries[EntryLevel_L1] = this->GetL1Entry(address);
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if (out_context->level_entries[EntryLevel_L1]->IsMappedTable()) {
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/* Get the L2 entry, and check if it's a table. */
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out_context->level_entries[EntryLevel_L2] = this->GetL2EntryFromTable(GetPageTableVirtualAddress(out_context->level_entries[EntryLevel_L1]->GetTable()), address);
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if (out_context->level_entries[EntryLevel_L2]->IsMappedTable()) {
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/* Get the L3 entry. */
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out_context->level_entries[EntryLevel_L3] = this->GetL3EntryFromTable(GetPageTableVirtualAddress(out_context->level_entries[EntryLevel_L2]->GetTable()), address);
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/* Update the context for next traversal. */
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switch (out_entry->block_size) {
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case L1ContiguousBlockSize:
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out_context->l1_entry += (L1ContiguousBlockSize / L1BlockSize) - GetContiguousL1Offset(address) / L1BlockSize;
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break;
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case L1BlockSize:
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out_context->l1_entry += 1;
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break;
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case L2ContiguousBlockSize:
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out_context->l1_entry += 1;
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out_context->l2_entry += (L2ContiguousBlockSize / L2BlockSize) - GetContiguousL2Offset(address) / L2BlockSize;
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break;
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case L2BlockSize:
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out_context->l1_entry += 1;
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out_context->l2_entry += 1;
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break;
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case L3ContiguousBlockSize:
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out_context->l1_entry += 1;
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out_context->l2_entry += 1;
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out_context->l3_entry += (L3ContiguousBlockSize / L3BlockSize) - GetContiguousL3Offset(address) / L3BlockSize;
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break;
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case L3BlockSize:
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out_context->l1_entry += 1;
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out_context->l2_entry += 1;
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out_context->l3_entry += 1;
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break;
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MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
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/* It's either a page or not. */
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out_context->level = EntryLevel_L3;
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} else {
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/* Not a L2 table, so possibly an L2 block. */
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out_context->level = EntryLevel_L2;
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}
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} else {
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/* Not a L1 table, so possibly an L1 block. */
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out_context->level = EntryLevel_L1;
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}
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return valid;
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/* Determine other fields. */
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const auto *pte = out_context->level_entries[out_context->level];
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out_context->is_contiguous = pte->IsContiguous();
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out_entry->sw_reserved_bits = pte->GetSoftwareReservedBits();
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out_entry->attr = 0;
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out_entry->phys_addr = this->GetBlock(pte, out_context->level) + this->GetOffset(address, out_context->level);
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out_entry->block_size = static_cast<size_t>(1) << (PageBits + LevelBits * out_context->level + 4 * out_context->is_contiguous);
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return out_context->level == EntryLevel_L3 ? pte->IsPage() : pte->IsBlock();
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}
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bool KPageTableImpl::ContinueTraversal(TraversalEntry *out_entry, TraversalContext *context) const {
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bool valid = false;
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/* Advance entry. */
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/* Check if we're not at the end of an L3 table. */
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if (!util::IsAligned(reinterpret_cast<uintptr_t>(context->l3_entry), PageSize)) {
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valid = this->ExtractL3Entry(out_entry, context, context->l3_entry, Null<KProcessAddress>);
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auto *cur_pte = context->level_entries[context->level];
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auto *next_pte = reinterpret_cast<PageTableEntry *>(context->is_contiguous ? util::AlignDown(reinterpret_cast<uintptr_t>(cur_pte), 0x10 * sizeof(PageTableEntry)) + 0x10 * sizeof(PageTableEntry) : reinterpret_cast<uintptr_t>(cur_pte) + sizeof(PageTableEntry));
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switch (out_entry->block_size) {
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case L3ContiguousBlockSize:
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context->l3_entry += (L3ContiguousBlockSize / L3BlockSize);
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break;
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case L3BlockSize:
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context->l3_entry += 1;
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break;
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MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
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}
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} else if (!util::IsAligned(reinterpret_cast<uintptr_t>(context->l2_entry), PageSize)) {
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/* We're not at the end of an L2 table. */
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valid = this->ExtractL2Entry(out_entry, context, context->l2_entry, Null<KProcessAddress>);
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/* Set the pte. */
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context->level_entries[context->level] = next_pte;
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switch (out_entry->block_size) {
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case L2ContiguousBlockSize:
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context->l2_entry += (L2ContiguousBlockSize / L2BlockSize);
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break;
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case L2BlockSize:
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context->l2_entry += 1;
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break;
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case L3ContiguousBlockSize:
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context->l2_entry += 1;
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context->l3_entry += (L3ContiguousBlockSize / L3BlockSize);
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break;
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case L3BlockSize:
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context->l2_entry += 1;
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context->l3_entry += 1;
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break;
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MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
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}
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} else {
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/* We need to update the l1 entry. */
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const size_t l1_index = context->l1_entry - m_table;
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if (l1_index < m_num_entries) {
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valid = this->ExtractL1Entry(out_entry, context, context->l1_entry, Null<KProcessAddress>);
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} else {
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/* Invalid, end traversal. */
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out_entry->phys_addr = Null<KPhysicalAddress>;
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out_entry->block_size = L1BlockSize;
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out_entry->sw_reserved_bits = 0;
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out_entry->attr = 0;
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context->l1_entry = m_table + m_num_entries;
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context->l2_entry = nullptr;
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context->l3_entry = nullptr;
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/* Advance appropriately. */
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while (context->level < EntryLevel_L1 && util::IsAligned(reinterpret_cast<uintptr_t>(context->level_entries[context->level]), PageSize)) {
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/* Advance the above table by one entry. */
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context->level_entries[context->level + 1]++;
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context->level = static_cast<EntryLevel>(util::ToUnderlying(context->level) + 1);
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}
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/* Check if we've hit the end of the L1 table. */
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if (context->level == EntryLevel_L1) {
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if (context->level_entries[EntryLevel_L1] - static_cast<const PageTableEntry *>(m_table) >= m_num_entries) {
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*context = {};
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*out_entry = {};
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return false;
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}
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switch (out_entry->block_size) {
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case L1ContiguousBlockSize:
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context->l1_entry += (L1ContiguousBlockSize / L1BlockSize);
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break;
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case L1BlockSize:
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context->l1_entry += 1;
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break;
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case L2ContiguousBlockSize:
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context->l1_entry += 1;
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context->l2_entry += (L2ContiguousBlockSize / L2BlockSize);
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break;
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case L2BlockSize:
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context->l1_entry += 1;
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context->l2_entry += 1;
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break;
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case L3ContiguousBlockSize:
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context->l1_entry += 1;
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context->l2_entry += 1;
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context->l3_entry += (L3ContiguousBlockSize / L3BlockSize);
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break;
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case L3BlockSize:
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context->l1_entry += 1;
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context->l2_entry += 1;
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context->l3_entry += 1;
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break;
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MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
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}
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}
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return valid;
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/* We may have advanced to a new table, and if we have we should descend. */
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while (context->level > EntryLevel_L3 && context->level_entries[context->level]->IsMappedTable()) {
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context->level_entries[context->level - 1] = GetPointer<PageTableEntry>(GetPageTableVirtualAddress(context->level_entries[context->level]->GetTable()));
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context->level = static_cast<EntryLevel>(util::ToUnderlying(context->level) - 1);
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}
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const auto *pte = context->level_entries[context->level];
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context->is_contiguous = pte->IsContiguous();
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out_entry->sw_reserved_bits = pte->GetSoftwareReservedBits();
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out_entry->attr = 0;
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out_entry->phys_addr = this->GetBlock(pte, context->level);
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out_entry->block_size = static_cast<size_t>(1) << (PageBits + LevelBits * context->level + 4 * context->is_contiguous);
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return context->level == EntryLevel_L3 ? pte->IsPage() : pte->IsBlock();
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}
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bool KPageTableImpl::GetPhysicalAddress(KPhysicalAddress *out, KProcessAddress address) const {
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@ -283,32 +232,27 @@ namespace ams::kern::arch::arm64 {
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}
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}
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/* Try to get from l1 table. */
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const L1PageTableEntry *l1_entry = this->GetL1Entry(address);
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if (l1_entry->IsBlock()) {
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*out = l1_entry->GetBlock() + GetL1Offset(address);
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return true;
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} else if (!l1_entry->IsTable()) {
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return false;
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/* Get the L1 entry, and check if it's a table. */
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const PageTableEntry *pte = this->GetL1Entry(address);
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EntryLevel level = EntryLevel_L1;
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if (pte->IsMappedTable()) {
|
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/* Get the L2 entry, and check if it's a table. */
|
||||
pte = this->GetL2EntryFromTable(GetPageTableVirtualAddress(pte->GetTable()), address);
|
||||
level = EntryLevel_L2;
|
||||
if (pte->IsMappedTable()) {
|
||||
pte = this->GetL3EntryFromTable(GetPageTableVirtualAddress(pte->GetTable()), address);
|
||||
level = EntryLevel_L3;
|
||||
}
|
||||
}
|
||||
|
||||
/* 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;
|
||||
const bool is_block = level == EntryLevel_L3 ? pte->IsPage() : pte->IsBlock();
|
||||
if (is_block) {
|
||||
*out = this->GetBlock(pte, level) + this->GetOffset(address, level);
|
||||
} else {
|
||||
*out = Null<KPhysicalAddress>;
|
||||
}
|
||||
|
||||
/* 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;
|
||||
return is_block;
|
||||
}
|
||||
|
||||
void KPageTableImpl::Dump(uintptr_t start, size_t size) const {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue