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-rw-r--r--src/core/hle/kernel/k_page_table.cpp77
-rw-r--r--src/core/hle/kernel/k_page_table.h6
2 files changed, 83 insertions, 0 deletions
diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp
index 02d93b12e..0a932334f 100644
--- a/src/core/hle/kernel/k_page_table.cpp
+++ b/src/core/hle/kernel/k_page_table.cpp
@@ -486,6 +486,58 @@ VAddr KPageTable::FindFreeArea(VAddr region_start, std::size_t region_num_pages,
return address;
}
+ResultCode KPageTable::MakePageGroup(KPageLinkedList& pg, VAddr addr, size_t num_pages) {
+ ASSERT(this->IsLockedByCurrentThread());
+
+ const size_t size = num_pages * PageSize;
+
+ // We're making a new group, not adding to an existing one.
+ R_UNLESS(pg.Empty(), ResultInvalidCurrentMemory);
+
+ // Begin traversal.
+ Common::PageTable::TraversalContext context;
+ Common::PageTable::TraversalEntry next_entry;
+ R_UNLESS(page_table_impl.BeginTraversal(next_entry, context, addr), ResultInvalidCurrentMemory);
+
+ // Prepare tracking variables.
+ PAddr cur_addr = next_entry.phys_addr;
+ size_t cur_size = next_entry.block_size - (cur_addr & (next_entry.block_size - 1));
+ size_t tot_size = cur_size;
+
+ // Iterate, adding to group as we go.
+ const auto& memory_layout = system.Kernel().MemoryLayout();
+ while (tot_size < size) {
+ R_UNLESS(page_table_impl.ContinueTraversal(next_entry, context),
+ ResultInvalidCurrentMemory);
+
+ if (next_entry.phys_addr != (cur_addr + cur_size)) {
+ const size_t cur_pages = cur_size / PageSize;
+
+ R_UNLESS(IsHeapPhysicalAddress(memory_layout, cur_addr), ResultInvalidCurrentMemory);
+ R_TRY(pg.AddBlock(cur_addr, cur_pages));
+
+ cur_addr = next_entry.phys_addr;
+ cur_size = next_entry.block_size;
+ } else {
+ cur_size += next_entry.block_size;
+ }
+
+ tot_size += next_entry.block_size;
+ }
+
+ // Ensure we add the right amount for the last block.
+ if (tot_size > size) {
+ cur_size -= (tot_size - size);
+ }
+
+ // Add the last block.
+ const size_t cur_pages = cur_size / PageSize;
+ R_UNLESS(IsHeapPhysicalAddress(memory_layout, cur_addr), ResultInvalidCurrentMemory);
+ R_TRY(pg.AddBlock(cur_addr, cur_pages));
+
+ return ResultSuccess;
+}
+
ResultCode KPageTable::UnmapProcessMemory(VAddr dst_addr, std::size_t size,
KPageTable& src_page_table, VAddr src_addr) {
KScopedLightLock lk(general_lock);
@@ -1223,6 +1275,31 @@ ResultCode KPageTable::UnmapPages(VAddr address, std::size_t num_pages, KMemoryS
return ResultSuccess;
}
+ResultCode KPageTable::MakeAndOpenPageGroup(KPageLinkedList* out, VAddr address, size_t num_pages,
+ KMemoryState state_mask, KMemoryState state,
+ KMemoryPermission perm_mask, KMemoryPermission perm,
+ KMemoryAttribute attr_mask, KMemoryAttribute attr) {
+ // Ensure that the page group isn't null.
+ ASSERT(out != nullptr);
+
+ // Make sure that the region we're mapping is valid for the table.
+ const size_t size = num_pages * PageSize;
+ R_UNLESS(this->Contains(address, size), ResultInvalidCurrentMemory);
+
+ // Lock the table.
+ KScopedLightLock lk(general_lock);
+
+ // Check if state allows us to create the group.
+ R_TRY(this->CheckMemoryState(address, size, state_mask | KMemoryState::FlagReferenceCounted,
+ state | KMemoryState::FlagReferenceCounted, perm_mask, perm,
+ attr_mask, attr));
+
+ // Create a new page group for the region.
+ R_TRY(this->MakePageGroup(*out, address, num_pages));
+
+ return ResultSuccess;
+}
+
ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size,
Svc::MemoryPermission svc_perm) {
const size_t num_pages = size / PageSize;
diff --git a/src/core/hle/kernel/k_page_table.h b/src/core/hle/kernel/k_page_table.h
index 2ae7affa0..b61a39145 100644
--- a/src/core/hle/kernel/k_page_table.h
+++ b/src/core/hle/kernel/k_page_table.h
@@ -72,6 +72,10 @@ public:
ResultCode UnlockForDeviceAddressSpace(VAddr addr, std::size_t size);
ResultCode LockForCodeMemory(VAddr addr, std::size_t size);
ResultCode UnlockForCodeMemory(VAddr addr, std::size_t size);
+ ResultCode MakeAndOpenPageGroup(KPageLinkedList* out, VAddr address, size_t num_pages,
+ KMemoryState state_mask, KMemoryState state,
+ KMemoryPermission perm_mask, KMemoryPermission perm,
+ KMemoryAttribute attr_mask, KMemoryAttribute attr);
Common::PageTable& PageTableImpl() {
return page_table_impl;
@@ -160,6 +164,8 @@ private:
attr_mask, attr, ignore_attr);
}
+ ResultCode MakePageGroup(KPageLinkedList& pg, VAddr addr, size_t num_pages);
+
bool IsLockedByCurrentThread() const {
return general_lock.IsLockedByCurrentThread();
}