Expose pmap_prefer parameters.

This enables future uvm_map code to make intelligent decisions.

Code is not called at the moment.

2 files changed, 31 insertions, 2 deletions

diff --git a/sys/arch/sh/include/pmap.h b/sys/arch/sh/include/pmap.h
index 55f5b7ff697..954f9b607c8 100644
--- a/sys/arch/sh/include/pmap.h
+++ b/sys/arch/sh/include/pmap.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pmap.h,v 1.9 2010/12/26 15:41:00 miod Exp $	*/
+/*	$OpenBSD: pmap.h,v 1.10 2011/04/28 20:40:36 ariane Exp $	*/
 /*	$NetBSD: pmap.h,v 1.28 2006/04/10 23:12:11 uwe Exp $	*/
 
 /*-
@@ -81,6 +81,13 @@ pmap_remove_all(struct pmap *pmap)
 #ifdef SH4
 #define	PMAP_PREFER(pa, va)		pmap_prefer((pa), (va))
 vaddr_t	pmap_prefer(vaddr_t, vaddr_t);
+vaddr_t	pmap_prefer_align(void);
+vaddr_t	pmap_prefer_offset(vaddr_t);
+
+/* pmap prefer alignment */
+#define PMAP_PREFER_ALIGN()		pmap_prefer_align()
+/* pmap prefer offset in alignment */
+#define PMAP_PREFER_OFFSET(of)		pmap_prefer_offset(of)
 #endif /* SH4 */
 
 #define	__HAVE_PMAP_DIRECT
diff --git a/sys/arch/sh/sh/pmap.c b/sys/arch/sh/sh/pmap.c
index 3adb1cd3305..cbfaf6875f8 100644
--- a/sys/arch/sh/sh/pmap.c
+++ b/sys/arch/sh/sh/pmap.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pmap.c,v 1.17 2010/12/14 20:24:25 jasper Exp $	*/
+/*	$OpenBSD: pmap.c,v 1.18 2011/04/28 20:40:36 ariane Exp $	*/
 /*	$NetBSD: pmap.c,v 1.55 2006/08/07 23:19:36 tsutsui Exp $	*/
 
 /*-
@@ -903,6 +903,28 @@ pmap_prefer(vaddr_t foff, vaddr_t va)
 
 	return va;
 }
+
+/*
+ * pmap_prefer_align()
+ *
+ * Return virtual cache alignment.
+ */
+vaddr_t
+pmap_prefer_align(void)
+{
+	return SH_HAS_VIRTUAL_ALIAS ? sh_cache_prefer_mask + 1 : 0;
+}
+
+/*
+ * pmap_prefer_offset(vaddr_t of)
+ *
+ * Calculate offset in virtual cache.
+ */
+vaddr_t
+pmap_prefer_offset(vaddr_t of)
+{
+	return of & (SH_HAS_VIRTUAL_ALIAS ? sh_cache_prefer_mask : 0);
+}
 #endif /* SH4 */
 
 /*