Kernel: Major repository refactor.

Rework the repo into Private and Public modules.

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/Private/HALKit/AMD64/HalPageAlloc.cpp b/Private/HALKit/AMD64/HalPageAlloc.cpp
new file mode 100644
index 00000000..ccdfa8b6
--- /dev/null
+++ b/Private/HALKit/AMD64/HalPageAlloc.cpp
@@ -0,0 +1,61 @@
+/*
+ *	========================================================
+ *
+ *	hCore
+ * 	Copyright 2024 Mahrouss Logic, all rights reserved.
+ *
+ * 	========================================================
+ */
+
+#include <HALKit/AMD64/HalPageAlloc.hpp>
+#include <NewKit/Defines.hpp>
+#include <NewKit/Panic.hpp>
+
+// this files handles paging.
+
+static hCore::UIntPtr kPagePtr = 0x0900000;
+static hCore::SizeT kPageCnt = 0UL;
+
+namespace hCore
+{
+    namespace HAL
+    {
+        static auto hal_try_alloc_new_page(SizeT sz, Boolean rw, Boolean user) -> PageTable64*
+        {
+            char *ptr = &(reinterpret_cast<char*>(kPagePtr))[kPageCnt + 1];
+
+            PageTable64 *pte = reinterpret_cast<PageTable64*>(ptr);
+            pte->Rw = rw;
+            pte->User = user;
+            pte->Present = true;
+
+            return pte;
+        }
+
+        auto hal_alloc_page(SizeT sz, Boolean rw, Boolean user) -> PageTable64*
+        {
+            for (SizeT i = 0; i < kPageCnt; ++i)
+            {
+                PageTable64 *pte = (reinterpret_cast<PageTable64*>(&kPagePtr) + i);
+
+                if (!pte->Present) {
+                    pte->User = user;
+                    pte->Rw = rw;
+                    pte->Present = true;
+
+                    return pte;
+                }
+            }
+
+            return hal_try_alloc_new_page(sz, rw, user);
+        }
+
+        auto hal_create_page(Boolean rw, Boolean user) -> UIntPtr
+        {
+            PageTable64 *new_pte = hal_alloc_page(sizeof(PageTable64), rw, user);
+            MUST_PASS(new_pte);
+
+            return reinterpret_cast<UIntPtr>(new_pte);
+        }
+    } // namespace HAL
+} // namespace hCore