Implement local sfbuf_map and sfbuf_unmap for MIPS32.

The pre-rework behaviour was not to keep the cached mappings around after
the sfbuf was used but instead to recycle said mappings.

PR:		kern/193400

1 files changed, 19 insertions, 0 deletions

diff --git a/sys/mips/include/sf_buf.h b/sys/mips/include/sf_buf.h
index 76fb993..01ecd23 100644
--- a/sys/mips/include/sf_buf.h
+++ b/sys/mips/include/sf_buf.h
@@ -48,4 +48,23 @@ sf_buf_page(struct sf_buf *sf)
 }
 
 #endif /* __mips_n64 */
+
+#ifndef	__mips_n64	/* in 32 bit mode we manage our own mappings */
+
+static inline void
+sf_buf_map(struct sf_buf *sf, int flags)
+{
+
+	pmap_qenter(sf->kva, &sf->m, 1);
+}
+
+static inline int
+sf_buf_unmap(struct sf_buf *sf)
+{
+	pmap_qremove(sf->kva, 1);
+	return (1);
+}
+
+#endif	/* ! __mips_n64 */
+
 #endif /* !_MACHINE_SF_BUF_H_ */