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kern: Implement new PageTable operations/PhysicalMemory reference semantics

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This commit is contained in:
Michael Scire
2022-10-11 22:37:43 -07:00
committed by SciresM
parent 5ee7d8a5ed
commit 7f2cbba543
8 changed files with 91 additions and 155 deletions
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18
libraries/libmesosphere/include/mesosphere/kern_k_memory_manager.hpp
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@@ -200,7 +200,7 @@ namespace ams::kern {
NOINLINE KPhysicalAddress AllocateAndOpenContinuous(size_t num_pages, size_t align_pages, u32 option);
NOINLINE Result AllocateAndOpen(KPageGroup *out, size_t num_pages, u32 option);
NOINLINE Result AllocateAndOpenForProcess(KPageGroup *out, size_t num_pages, u32 option, u64 process_id, u8 fill_pattern);
NOINLINE Result AllocateForProcess(KPageGroup *out, size_t num_pages, u32 option, u64 process_id, u8 fill_pattern);
Pool GetPool(KPhysicalAddress address) const {
return this->GetManager(address).GetPool();
@@ -222,6 +222,22 @@ namespace ams::kern {
}
}
void OpenFirst(KPhysicalAddress address, size_t num_pages) {
/* Repeatedly open references until we've done so for all pages. */
while (num_pages) {
auto &manager = this->GetManager(address);
const size_t cur_pages = std::min(num_pages, manager.GetPageOffsetToEnd(address));
{
KScopedLightLock lk(m_pool_locks[manager.GetPool()]);
manager.OpenFirst(address, cur_pages);
}
num_pages -= cur_pages;
address += cur_pages * PageSize;
}
}
void Close(KPhysicalAddress address, size_t num_pages) {
/* Repeatedly close references until we've done so for all pages. */
while (num_pages) {