1 files changed, 28 insertions, 0 deletions
diff --git a/src/kernel/mem/virt.h b/src/kernel/mem/virt.h
new file mode 100644
index 0000000..98a7a16
--- /dev/null
+++ b/src/kernel/mem/virt.h
@@ -0,0 +1,28 @@
+/* contains utilities for interacting with virtual memory */
+#pragma once
+#include <kernel/types.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+struct virt_iter {
+	void *frag;
+	size_t frag_len;
+	size_t prior; // sum of all prior frag_lens
+	bool error;
+
+	user_ptr _virt;
+	size_t _remaining;
+	struct pagedir *_pages;
+	bool _user;
+	bool _writeable;
+};
+
+void virt_iter_new(
+		struct virt_iter *iter, user_ptr virt, size_t length,
+		struct pagedir *pages, bool user, bool writeable);
+
+bool virt_iter_next(struct virt_iter *);
+
+bool virt_user_cpy(
+		struct pagedir *dest_pages,       user_ptr dest,
+		struct pagedir  *src_pages, const user_ptr src, size_t length);