kernel/amd64: pmap: Add support for creating VAS

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/include/vm/pmap.h b/sys/include/vm/pmap.h
index fcef35d..6e37a00 100644
--- a/sys/include/vm/pmap.h
+++ b/sys/include/vm/pmap.h
@@ -53,6 +53,8 @@
 #define PMAP_WRITABLE __BIT(0)      /* Writable */
 #define PMAP_EXEC     __BIT(1)      /* Executable */
 
+#define is_vas_valid(vas) (vas.top_level != 0)
+
 /*
  * vm_ctx - Per core virtual memory context
  */
@@ -63,6 +65,8 @@ struct vm_ctx {
     struct spinlock dynalloc_lock;
 };
 
+struct vas pmap_create_vas(struct vm_ctx *);
+
 /*
  * Read virtual address space descriptor
  * and return it.