src: Fix encoding of MMAP flags for generic_bs_mmap

[Repository Conversion <srcmastr%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/82b0394d89c4
branches:  trunk
changeset: 317999:82b0394d89c4
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Apr 09 22:26:15 2018 +0000
description:
Fix encoding of MMAP flags for generic_bs_mmap

diffstat:

 sys/arch/aarch64/aarch64/bus_space.c |  12 ++++++++----
 sys/arch/aarch64/include/pmap.h      |  10 +++++-----
 2 files changed, 13 insertions(+), 9 deletions(-)

diffs (57 lines):

diff -r b0d3dd6c0383 -r 82b0394d89c4 sys/arch/aarch64/aarch64/bus_space.c
--- a/sys/arch/aarch64/aarch64/bus_space.c      Mon Apr 09 20:17:33 2018 +0000
+++ b/sys/arch/aarch64/aarch64/bus_space.c      Mon Apr 09 22:26:15 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: bus_space.c,v 1.2 2018/04/01 04:35:03 ryo Exp $ */
+/* $NetBSD: bus_space.c,v 1.3 2018/04/09 22:26:15 jmcneill Exp $ */
 
 /*
  * Copyright (c) 2017 Ryo Shimizu <ryo%nerv.org@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: bus_space.c,v 1.2 2018/04/01 04:35:03 ryo Exp $");
+__KERNEL_RCSID(1, "$NetBSD: bus_space.c,v 1.3 2018/04/09 22:26:15 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -615,8 +615,12 @@
 {
        paddr_t bus_flags = 0;
 
-       if ((flags & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE)) != 0)
-               bus_flags |= AARCH64_MMAP_WRITEBACK;
+       if ((flags & BUS_SPACE_MAP_CACHEABLE) != 0)
+               bus_flags |= (AARCH64_MMAP_WRITEBACK << AARCH64_MMAP_FLAG_SHIFT);
+       else if ((flags & BUS_SPACE_MAP_PREFETCHABLE) != 0)
+               bus_flags |= (AARCH64_MMAP_WRITECOMBINE << AARCH64_MMAP_FLAG_SHIFT);
+       else
+               bus_flags |= (AARCH64_MMAP_DEVICE << AARCH64_MMAP_FLAG_SHIFT);
 
        return (atop(bpa + (offset << ((struct bus_space *)t)->bs_stride)) |
            bus_flags);
diff -r b0d3dd6c0383 -r 82b0394d89c4 sys/arch/aarch64/include/pmap.h
--- a/sys/arch/aarch64/include/pmap.h   Mon Apr 09 20:17:33 2018 +0000
+++ b/sys/arch/aarch64/include/pmap.h   Mon Apr 09 22:26:15 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.h,v 1.2 2018/04/01 04:35:03 ryo Exp $ */
+/* $NetBSD: pmap.h,v 1.3 2018/04/09 22:26:16 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -150,10 +150,10 @@
 /* mmap cookie and flags */
 #define AARCH64_MMAP_FLAG_SHIFT                (64 - PGSHIFT)
 #define AARCH64_MMAP_FLAG_MASK         0xf
-#define AARCH64_MMAP_WRITEBACK         0
-#define AARCH64_MMAP_NOCACHE           1
-#define AARCH64_MMAP_WRITECOMBINE      2
-#define AARCH64_MMAP_DEVICE            3
+#define AARCH64_MMAP_WRITEBACK         0UL
+#define AARCH64_MMAP_NOCACHE           1UL
+#define AARCH64_MMAP_WRITECOMBINE      2UL
+#define AARCH64_MMAP_DEVICE            3UL
 
 #define ARM_MMAP_WRITECOMBINE          AARCH64_MMAP_WRITECOMBINE
 #define ARM_MMAP_WRITEBACK             AARCH64_MMAP_WRITEBACK