From d62920dcd07e947e9dc4228d10fa471bd6a6cb9c Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 16 Sep 2025 16:42:35 -0400
Subject: kern: vm: Implement lazy allocation for vm_map()

Introduce lazy allocation in the vm_map() function. When passing a zero
value to any of the base address fields of the map spec, allocate our
own memory.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 src/sys/include/vm/map.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/sys/include/vm')

diff --git a/src/sys/include/vm/map.h b/src/sys/include/vm/map.h
index 4e0f27e..69d7d73 100644
--- a/src/sys/include/vm/map.h
+++ b/src/sys/include/vm/map.h
@@ -44,6 +44,9 @@
  * @len: Length of mapping (4K aligned)
  * @prot: Memory protection flags (PROT_*)
  *
+ * XXX: If spec->va or spec->pa is a value of zero, an address
+ *      will be assigned and shared by both.
+ *
  * Returns zero on success, otherwise a less than zero value
  * on failure.
  */
-- 
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