ptos: mm: Add high-level page mapping interface

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

service/ptos/head/mm/vm.h

@@ -10,6 +10,10 @@
 #define _MM_VM_H_ 1
 
 #include <ke/bpal.h>
+#include <hal/vas.h>
+#include <hal/mmu.h>
+#include <ptapi/ptmm.h>
+#include <ptdef.h>
 
 /*
  * Virtual memory allocation region. This is outside the
@@ -28,4 +32,39 @@
 #define VMA_TO_PMA(VMA) \
     (UPTR)PTR_NOFFSET(VMA, KeBpalLoadBase())
 
+/*
+ * Represents a virtual memory range
+ *
+ * @VirtualBase:    Virtual address base
+ * @PhysicalBase:   Physical address base
+ * @Length:         Length of memory range
+ */
+typedef struct {
+    UPTR VirtualBase;
+    UPTR PhysicalBase;
+    USIZE Length;
+} MM_RANGE;
+
+/*
+ * Unmap a virtual memory range
+ *
+ * @Vas:        Virtual address space to unmap
+ * @Range:      Range to unmap
+ * @PageSize:   Page size to unmap
+ */
+PT_STATUS MmUnmapRange(MMU_VAS *Vas, const MM_RANGE *Range, MMU_PAGESIZE PageSize);
+
+/*
+ * Map a virtual memory range
+ *
+ * @Vas:        Virtual address space to map within
+ * @Range:      Range to map
+ * @Prot:       Protection flags to map with
+ * @PageSize:   Page size to map
+ */
+PT_STATUS MmMapRange(
+    MMU_VAS *Vas, const MM_RANGE *Range,
+    MM_PROT Prot, MMU_PAGESIZE PageSize
+);
+
 #endif  /* !_MM_VM_H_ */