[src/trunk]: src/sys/arch/sparc64/dev Initialize IOMMU control and status reg...

[palle <palle%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/416916d79911
branches:  trunk
changeset: 801943:416916d79911
user:      palle <palle%NetBSD.org@localhost>
date:      Sun Aug 24 19:09:43 2014 +0000

description:
Initialize IOMMU control and status register properly - from OpenBSD - ok mrg@

diffstat:

 sys/arch/sparc64/dev/iommu.c    |  12 +++++++++---
 sys/arch/sparc64/dev/iommureg.h |   7 ++++++-
 2 files changed, 15 insertions(+), 4 deletions(-)

diffs (54 lines):

diff -r 25fc4bf0ff43 -r 416916d79911 sys/arch/sparc64/dev/iommu.c
--- a/sys/arch/sparc64/dev/iommu.c      Sun Aug 24 19:06:14 2014 +0000
+++ b/sys/arch/sparc64/dev/iommu.c      Sun Aug 24 19:09:43 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: iommu.c,v 1.107 2012/03/25 03:51:33 mrg Exp $  */
+/*     $NetBSD: iommu.c,v 1.108 2014/08/24 19:09:43 palle Exp $        */
 
 /*
  * Copyright (c) 1999, 2000 Matthew R. Green
@@ -59,7 +59,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: iommu.c,v 1.107 2012/03/25 03:51:33 mrg Exp $");
+__KERNEL_RCSID(0, "$NetBSD: iommu.c,v 1.108 2014/08/24 19:09:43 palle Exp $");
 
 #include "opt_ddb.h"
 
@@ -134,7 +134,13 @@
         * be hard-wired, so we read the start and size from the PROM and
         * just use those values.
         */
-       is->is_cr = IOMMUCR_EN;
+       if (strncmp(name, "pyro", 4) == 0) {
+               is->is_cr = IOMMUREG_READ(is, iommu_cr);
+               is->is_cr &= ~IOMMUCR_FIRE_BE;
+               is->is_cr |= (IOMMUCR_FIRE_SE | IOMMUCR_FIRE_CM_EN |
+                   IOMMUCR_FIRE_TE);
+       } else 
+               is->is_cr = IOMMUCR_EN;
        is->is_tsbsize = tsbsize;
        if (iovabase == -1) {
                is->is_dvmabase = IOTSB_VSTART(is->is_tsbsize);
diff -r 25fc4bf0ff43 -r 416916d79911 sys/arch/sparc64/dev/iommureg.h
--- a/sys/arch/sparc64/dev/iommureg.h   Sun Aug 24 19:06:14 2014 +0000
+++ b/sys/arch/sparc64/dev/iommureg.h   Sun Aug 24 19:09:43 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: iommureg.h,v 1.19 2011/03/20 20:42:06 mrg Exp $        */
+/*     $NetBSD: iommureg.h,v 1.20 2014/08/24 19:09:43 palle Exp $      */
 
 /*
  * Copyright (c) 1992, 1993
@@ -110,6 +110,11 @@
 #define IOMMUCR_DE             0x000000000000000002LL  /* Diag enable */
 #define IOMMUCR_EN             0x000000000000000001LL  /* Enable IOMMU */
 
+#define IOMMUCR_FIRE_SE                0x000000000000000400LL  /* Snoop enable */
+#define IOMMUCR_FIRE_CM_EN     0x000000000000000300LL  /* Cache mode enable */
+#define IOMMUCR_FIRE_BE                0x000000000000000002LL  /* Bypass enable */
+#define IOMMUCR_FIRE_TE                0x000000000000000001LL  /* Translation enabled */
+
 /*
  * IOMMU stuff
  */