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hle: kernel: k_page_table: Implement MakeAndOpenPageGroup & MakePageGroup.

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bunnei 2022-03-26 01:25:52 -07:00
parent c975a51ae7
commit 5b667f5e52
2 changed files with 83 additions and 0 deletions
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77
src/core/hle/kernel/k_page_table.cpp
View file

@ -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;

6
src/core/hle/kernel/k_page_table.h
View file

@ -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();
}