From f3fe5e8d39fc9bbcffb346d0b7329445140a1e93 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 18 Nov 2025 00:43:20 -0500
Subject: kern/amd64: mmu: Add mu_pmap_forkvas() helper

The mu_pmap_forkvas() function copies the current virtual address with
the user porition zeroed.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/inc/mu/mmu.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'sys/inc/mu/mmu.h')

diff --git a/sys/inc/mu/mmu.h b/sys/inc/mu/mmu.h
index ce52376..945e375 100644
--- a/sys/inc/mu/mmu.h
+++ b/sys/inc/mu/mmu.h
@@ -34,6 +34,12 @@
 #include <sys/cdefs.h>
 #include <md/vas.h>    /* shared */
 
+/*
+ * Copy the current VAS leaving the user-side
+ * zeroed
+ */
+__strong int mu_pmap_forkvas(struct mmu_vas *result);
+
 /*
  * Read the currently in-use virtual address space
  * structure
-- 
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