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hle: kernel: KMemoryManager: Add CalculateManagementOverheadSize.

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This commit is contained in:
bunnei 2021-02-18 17:55:46 -08:00
parent 43a29b5803
commit a439867f2c
2 changed files with 26 additions and 0 deletions
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12
src/core/hle/kernel/k_memory_manager.cpp
View File

@ -173,4 +173,16 @@ ResultCode KMemoryManager::Free(KPageLinkedList& page_list, std::size_t num_page
return RESULT_SUCCESS;
}
std::size_t KMemoryManager::Impl::CalculateManagementOverheadSize(std::size_t region_size) {
const std::size_t ref_count_size = (region_size / PageSize) * sizeof(u16);
const std::size_t optimize_map_size =
(Common::AlignUp((region_size / PageSize), Common::BitSize<u64>()) /
Common::BitSize<u64>()) *
sizeof(u64);
const std::size_t manager_meta_size =
Common::AlignUp(optimize_map_size + ref_count_size, PageSize);
const std::size_t page_heap_size = KPageHeap::CalculateManagementOverheadSize(region_size);
return manager_meta_size + page_heap_size;
}
} // namespace Kernel

14
src/core/hle/kernel/k_memory_manager.h
View File

@ -60,6 +60,10 @@ public:
static constexpr std::size_t MaxManagerCount = 10;
public:
static std::size_t CalculateManagementOverheadSize(std::size_t region_size) {
return Impl::CalculateManagementOverheadSize(region_size);
}
static constexpr u32 EncodeOption(Pool pool, Direction dir) {
return (static_cast<u32>(pool) << static_cast<u32>(Pool::Shift)) |
(static_cast<u32>(dir) << static_cast<u32>(Direction::Shift));
@ -89,6 +93,16 @@ private:
KPageHeap heap;
Pool pool{};
public:
static std::size_t CalculateManagementOverheadSize(std::size_t region_size);
static constexpr std::size_t CalculateOptimizedProcessOverheadSize(
std::size_t region_size) {
return (Common::AlignUp((region_size / PageSize), Common::BitSize<u64>()) /
Common::BitSize<u64>()) *
sizeof(u64);
}
public:
Impl() = default;