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-rw-r--r--src/core/hle/kernel/k_page_group.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/core/hle/kernel/k_page_group.h b/src/core/hle/kernel/k_page_group.h
index 968753992..316f172f2 100644
--- a/src/core/hle/kernel/k_page_group.h
+++ b/src/core/hle/kernel/k_page_group.h
@@ -5,6 +5,7 @@
#include <list>
+#include "common/alignment.h"
#include "common/assert.h"
#include "common/common_types.h"
#include "core/hle/kernel/memory_types.h"
@@ -12,6 +13,89 @@
namespace Kernel {
+class KPageGroup;
+
+class KBlockInfo {
+private:
+ friend class KPageGroup;
+
+public:
+ constexpr KBlockInfo() = default;
+
+ constexpr void Initialize(PAddr addr, size_t np) {
+ ASSERT(Common::IsAligned(addr, PageSize));
+ ASSERT(static_cast<u32>(np) == np);
+
+ m_page_index = static_cast<u32>(addr) / PageSize;
+ m_num_pages = static_cast<u32>(np);
+ }
+
+ constexpr PAddr GetAddress() const {
+ return m_page_index * PageSize;
+ }
+ constexpr size_t GetNumPages() const {
+ return m_num_pages;
+ }
+ constexpr size_t GetSize() const {
+ return this->GetNumPages() * PageSize;
+ }
+ constexpr PAddr GetEndAddress() const {
+ return (m_page_index + m_num_pages) * PageSize;
+ }
+ constexpr PAddr GetLastAddress() const {
+ return this->GetEndAddress() - 1;
+ }
+
+ constexpr KBlockInfo* GetNext() const {
+ return m_next;
+ }
+
+ constexpr bool IsEquivalentTo(const KBlockInfo& rhs) const {
+ return m_page_index == rhs.m_page_index && m_num_pages == rhs.m_num_pages;
+ }
+
+ constexpr bool operator==(const KBlockInfo& rhs) const {
+ return this->IsEquivalentTo(rhs);
+ }
+
+ constexpr bool operator!=(const KBlockInfo& rhs) const {
+ return !(*this == rhs);
+ }
+
+ constexpr bool IsStrictlyBefore(PAddr addr) const {
+ const PAddr end = this->GetEndAddress();
+
+ if (m_page_index != 0 && end == 0) {
+ return false;
+ }
+
+ return end < addr;
+ }
+
+ constexpr bool operator<(PAddr addr) const {
+ return this->IsStrictlyBefore(addr);
+ }
+
+ constexpr bool TryConcatenate(PAddr addr, size_t np) {
+ if (addr != 0 && addr == this->GetEndAddress()) {
+ m_num_pages += static_cast<u32>(np);
+ return true;
+ }
+ return false;
+ }
+
+private:
+ constexpr void SetNext(KBlockInfo* next) {
+ m_next = next;
+ }
+
+private:
+ KBlockInfo* m_next{};
+ u32 m_page_index{};
+ u32 m_num_pages{};
+};
+static_assert(sizeof(KBlockInfo) <= 0x10);
+
class KPageGroup final {
public:
class Node final {
@@ -92,6 +176,8 @@ public:
return nodes.empty();
}
+ void Finalize() {}
+
private:
std::list<Node> nodes;
};