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kern: implement page group unmapping

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This commit is contained in:
Michael Scire 2020-02-18 01:04:44 -08:00
parent 25b0baae59
commit 154422562a
11 changed files with 654 additions and 12 deletions
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39
libraries/libmesosphere/source/kern_k_page_table_base.cpp
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@ -337,6 +337,11 @@ namespace ams::kern {
return ResultSuccess();
}
bool KPageTableBase::IsValidPageGroup(const KPageGroup &pg, KProcessAddress addr, size_t num_pages) const {
/* TODO */
return true;
}
Result KPageTableBase::MapPages(KProcessAddress *out_addr, size_t num_pages, size_t alignment, KPhysicalAddress phys_addr, bool is_pa_valid, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm) {
MESOSPHERE_ASSERT(util::IsAligned(alignment, PageSize) && alignment >= PageSize);
@ -382,6 +387,8 @@ namespace ams::kern {
}
Result KPageTableBase::MapPageGroup(KProcessAddress *out_addr, const KPageGroup &pg, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm) {
MESOSPHERE_ASSERT(!this->IsLockedByCurrentThread());
/* Ensure this is a valid map request. */
const size_t num_pages = pg.GetNumPages();
R_UNLESS(this->Contains(region_start, region_num_pages * PageSize, state), svc::ResultInvalidCurrentMemory());
@ -416,7 +423,37 @@ namespace ams::kern {
}
Result KPageTableBase::UnmapPageGroup(KProcessAddress address, const KPageGroup &pg, KMemoryState state) {
MESOSPHERE_TODO_IMPLEMENT();
MESOSPHERE_ASSERT(!this->IsLockedByCurrentThread());
/* Ensure this is a valid unmap request. */
const size_t num_pages = pg.GetNumPages();
const size_t size = num_pages * PageSize;
R_UNLESS(this->Contains(address, size, state), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Check if state allows us to unmap. */
R_TRY(this->CheckMemoryState(address, size, KMemoryState_All, state, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
/* Check that the page group is valid. */
R_UNLESS(this->IsValidPageGroup(pg, address, size), svc::ResultInvalidCurrentMemory());
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform unmapping operation. */
const KPageProperties properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), address, num_pages, Null<KPhysicalAddress>, false, properties, OperationType_Unmap, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, address, num_pages, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None);
return ResultSuccess();
}
}