ptos/amd64+hal: Add page mapping interface

Signed-off-by: Chloe M <chloe@mensia.org>

service/ptos/head/hal/mmu.h

@@ -9,9 +9,19 @@
 #ifndef _HAL_MMU_H_
 #define _HAL_MMU_H_ 1
 
+#include <ptapi/ptmm.h>
+#include <ptapi/status.h>
 #include <hal/vas.h>
 #include <ptdef.h>
 
+/*
+ * Represents valid page sizes that can be mapped
+ * with.
+ */
+typedef enum {
+    PAGESIZE_4K
+} MMU_PAGESIZE;
+
 /*
  * Read the current virtual address space into an
  * MMU_VAS descriptor.
@@ -28,4 +38,18 @@ VOID HalMmuReadVas(MMU_VAS *Result);
  */
 VOID HalMmuWriteVas(const MMU_VAS *Vas);
 
+/*
+ * Map a single page of memory
+ *
+ * @Vas:            Virtual address space to map within
+ * @VirtualBase:    Virtual address base to map
+ * @Prot:           Protection flags
+ * @PageSize:       Pagesize to map as
+ */
+PT_STATUS HalMmuMapPage(
+    MMU_VAS *Vas, UPTR VirtualBase,
+    UPTR PhysicalBase, MM_PROT Prot,
+    MMU_PAGESIZE PageSize
+);
+
 #endif  /* !_HAL_MMU_H_ */