stuff

kernel/include/kernel/vas.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <zinnia/mem.h>
+#include <zinnia/status.h>
+#include <kernel/mutex.h>
+#include <kernel/pmap.h>
+#include <kernel/vmo.h>
+
+// Virtual address space.
+struct vas {
+    // Architecture-specific virtual memory map implementation.
+    struct pmap pmap;
+};
+
+// Try to create a new, empty virtual address space.
+zn_status_t vma_new(struct vas** out);
+
+// Delete a virtual address space.
+void vma_delete(struct vas* vm);
+
+zn_status_t vma_map_vmo(
+    struct vas* vm,
+    struct vmo* vmo,
+    uintptr_t addr,
+    size_t len,
+    enum zn_vm_flags flags,
+    uintptr_t vmo_offset
+);
+
+// Remove any mappings in the given address range.
+zn_status_t vma_unmap(struct vas* vm, uintptr_t vaddr, size_t size);
+
+// Change the protection of an existing mapping.
+zn_status_t vma_protect(struct vas* vm, uintptr_t vaddr, size_t size, enum zn_vm_flags flags);
+
+// Try to handle a page fault.
+bool vma_page_fault(struct vas* vm, uintptr_t vaddr, enum zn_vm_flags access_type);
+
+extern struct vas kernel_vas;