stos: hal: Add virtual address space helpers

Signed-off-by: Chloe M. <chloe@mensia.org>
2026-06-22 21:46:51 +00:00
parent 53aea637b0
commit 532e46c62f
3 changed files with 93 additions and 0 deletions
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description:  AMD64 MMU management
+ * Author:       Chloe M.
+ */
+
+#include <hal/mmu.h>
+#include <machine/vas.h>
+#include <stdef.h>
+
+VOID
+HalMmuReadVas(MMU_VAS *Result)
+{
+    if (Result == NULL) {
+        return;
+    }
+
+    ASMV(
+        "mov %%cr3, %0"
+        : "=r" (Result->Cr3)
+        :
+        : "memory"
+    );
+}
+
+VOID
+HalMmuWriteVas(MMU_VAS *Vas)
+{
+    if (Vas == NULL) {
+        return;
+    }
+
+    ASMV(
+        "mov %0, %%cr3"
+        :
+        : "r" (Vas->Cr3)
+        : "memory"
+    );
+}