stos: vmm: Initialize virtual memory manager

Signed-off-by: Chloe M. <chloe@mensia.org>
2026-06-22 23:27:26 +00:00
parent 32a1463b92
commit eb8861e641
3 changed files with 44 additions and 0 deletions
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description:  Virtual memory manager
+ * Author:       Chloe M.
+ */
+
+#include <mm/vmm.h>
+#include <hal/mmu.h>
+#include <ex/trace.h>
+
+#define DTRACE(Fmt, ...) \
+    TRACE("[ VMM ]: " Fmt, ##__VA_ARGS__)
+
+static MMU_VAS KernelVas;
+
+VOID
+MmInitVmm(VOID)
+{
+    MMU_VAS OldVas;
+    ST_STATUS Status;
+
+    DTRACE("breeding kvas from bootstrap instance...\n");
+    HalMmuReadVas(&OldVas);
+    Status = HalMmuForkVas(&OldVas, &KernelVas);
+
+    if (Status != STATUS_SUCCESS) {
+        /* TODO: Panic here */
+        return;
+    }
+
+    HalMmuWriteVas(&KernelVas);
+    DTRACE("ah!~... [ok @ %p]\n", VAS_BASE(&KernelVas));
+}