Decouple pool initialization and validation from allocation logic

xtoskrnl/mm/amd64/pool.cc

@@ -0,0 +1,34 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/mm/amd64/pool.cc
+ * DESCRIPTION:     AMD64 Memory Manager pool manager
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtos.hh>
+
+
+/**
+ * Maps the PTE for the base of the non-paged pool.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+MM::Pool::MapNonPagedPool(VOID)
+{
+    PMMMEMORY_LAYOUT MemoryLayout;
+
+    /* Retrieve memory layout */
+    MemoryLayout = MM::Manager::GetMemoryLayout();
+
+    /* Map PPE and PDE for whole non-paged pool */
+    MM::Pte::MapPPE(MemoryLayout->NonPagedPoolStart, MemoryLayout->NonPagedExpansionPoolEnd, MM::Pte::GetValidPte());
+    MM::Pte::MapPDE(MemoryLayout->NonPagedPoolStart, MemoryLayout->NonPagedExpansionPoolEnd, MM::Pte::GetValidPte());
+
+    /* Map PTE only for the base of the non-paged pool */
+    MM::Pte::MapPTE(MemoryLayout->NonPagedPoolStart, (PCHAR)MemoryLayout->NonPagedPoolEnd - 1, MM::Pte::GetValidPte());
+}