Initial memory manager initialization code

xtoskrnl/mm/amd64/init.c

@@ -0,0 +1,104 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/mm/amd64/init.c
+ * DESCRIPTION:     Architecture specific Memory Manager initialization routines
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtos.h>
+
+
+/**
+ * Gets the address of the PDE (Page Directory Entry), that maps given address.
+ *
+ * @param Address
+ *        Specifies the address to find the PDE for.
+ *
+ * @return This routine returns the address of the PDE.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PMMPTE
+MmpGetPdeAddress(PVOID Address)
+{
+    ULONGLONG Offset;
+
+    Offset = ((((ULONGLONG)Address & (((ULONGLONG)1 << 48) - 1)) >> MM_PDI_SHIFT) << MM_PTE_SHIFT);
+    return (PMMPTE)(MM_PDE_BASE + Offset);
+}
+
+/**
+ * Gets the address of the PPE (Page Directory Pointer Table Entry), that maps given address.
+ *
+ * @param Address
+ *        Specifies the address to find the PPE for.
+ *
+ * @return This routine returns the address of the PPE.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PMMPTE
+MmpGetPpeAddress(PVOID Address)
+{
+    ULONGLONG Offset;
+
+    Offset = ((((ULONGLONG)Address & (((ULONGLONG)1 << 48) - 1)) >> MM_PPI_SHIFT) << MM_PTE_SHIFT);
+    return (PMMPTE)(MM_PPE_BASE + Offset);
+}
+
+/**
+ * Gets the address of the PTE (Page Table Entry), that maps given address.
+ *
+ * @param Address
+ *        Specifies the address to find the PTE for.
+ *
+ * @return This routine returns the address of the PTE.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PMMPTE
+MmpGetPteAddress(PVOID Address)
+{
+    ULONGLONG Offset;
+
+    Offset = ((((ULONGLONG)Address & (((ULONGLONG)1 << 48) - 1)) >> MM_PTI_SHIFT) << MM_PTE_SHIFT);
+    return (PMMPTE)(MM_PTE_BASE + Offset);
+}
+
+/**
+ * Gets the address of the PXE (Extended Page Entry), that maps given address.
+ *
+ * @param Address
+ *        Specifies the address to find the PXE for.
+ *
+ * @return This routine returns the address of the PXE.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PMMPTE
+MmpGetPxeAddress(PVOID Address)
+{
+    ULONGLONG Offset;
+
+    Offset = (((ULONGLONG)Address >> MM_PXI_SHIFT) & (MM_PXE_PER_PAGE - 1));
+    return (PMMPTE)(MM_PXE_BASE + Offset);
+}
+
+/**
+ * Performs architecture specific initialization of the XTOS Memory Manager.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+MmpInitializeArchitecture()
+{
+    UNIMPLEMENTED;
+}