many changes

- boot time memory allocation has changed. the fractal page map has been
  replaced by a single self-mapped page giving 2MiB of ready virtual
  space to play with without needing a fully-initialized memory manager. this
  scheme may be repeated for other purposes
- the page stack has now been totally overhauled to make use of sparse
  allocation and all of the ugly init_*() procedures are gone. long live
  the new interface. also reference counting is a thing now. sort of.
- found a bug in vmt_init_node where insertion did not use the root node as
  the parent in the case of no predecessor node. whoops.

1 files changed, 5 insertions, 1 deletions

diff --git a/api/kernel/memory/range.h b/api/kernel/memory/range.h
index 90b3354..0084bbb 100644
--- a/api/kernel/memory/range.h
+++ b/api/kernel/memory/range.h
@@ -7,10 +7,14 @@ typedef uintptr_t phys_addr_t;
 
 enum memory_range_type
 {
-    UNUSABLE_MEMORY,
+    // types for physical pages
     RESERVED_MEMORY,
     SYSTEM_MEMORY,
     AVAILABLE_MEMORY,
+    // types for firmware pages with unknown backing
+    FIRMWARE_MEMORY,
+    // types for other addresses that are not physical
+    MMIO_MEMORY,
     INVALID_MEMORY = 0xff
 };