Split out pmap_map_delete on arm64

This will be used when supporting some extensions, e.g. Branch Target
Identification (BTI).

Sponsored by:	Arm Ltd

(cherry picked from commit 020edaea2ab05c9cea7d83872f28a4e5e65407e2)

2 files changed, 13 insertions, 1 deletions

diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c
index edd34bcd5e68..037f1d5a805f 100644
--- a/sys/arm64/arm64/pmap.c
+++ b/sys/arm64/arm64/pmap.c
@@ -3295,6 +3295,18 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
 }
 
 /*
+ *	Remove the given range of addresses as part of a logical unmap
+ *	operation. This has the effect of calling pmap_remove(), but
+ *	also clears any metadata that should persist for the lifetime
+ *	of a logical mapping.
+ */
+void
+pmap_map_delete(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
+{
+	pmap_remove(pmap, sva, eva);
+}
+
+/*
  *	Routine:	pmap_remove_all
  *	Function:
  *		Removes this physical page from
diff --git a/sys/arm64/include/pmap.h b/sys/arm64/include/pmap.h
index 95e43eada9cc..7305b8d32e87 100644
--- a/sys/arm64/include/pmap.h
+++ b/sys/arm64/include/pmap.h
@@ -177,7 +177,7 @@ int	pmap_pinit_stage(pmap_t, enum pmap_stage, int);
 bool	pmap_ps_enabled(pmap_t pmap);
 uint64_t pmap_to_ttbr0(pmap_t pmap);
 void	pmap_disable_promotion(vm_offset_t sva, vm_size_t size);
-#define	pmap_map_delete(pmap, sva, eva)	pmap_remove(pmap, sva, eva)
+void	pmap_map_delete(pmap_t, vm_offset_t, vm_offset_t);
 
 void	*pmap_mapdev(vm_offset_t, vm_size_t);
 void	*pmap_mapbios(vm_paddr_t, vm_size_t);