From: kettenis <kettenis@openbsd.org>
Date: Sat, 12 Jul 2008 13:08:04 +0000 (+0000)
Subject: Perform IOMMU cache flushes on Oberon.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=51fdb79fd4ed39cf89e666e26493b649b3515def;p=openbsd

Perform IOMMU cache flushes on Oberon.
---

diff --git a/sys/arch/sparc64/dev/iommu.c b/sys/arch/sparc64/dev/iommu.c
index c9ef4eb2210..50da7b37b2a 100644
--- a/sys/arch/sparc64/dev/iommu.c
+++ b/sys/arch/sparc64/dev/iommu.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: iommu.c,v 1.49 2007/12/15 18:08:07 deraadt Exp $	*/
+/*	$OpenBSD: iommu.c,v 1.50 2008/07/12 13:08:04 kettenis Exp $	*/
 /*	$NetBSD: iommu.c,v 1.47 2002/02/08 20:03:45 eeh Exp $	*/
 
 /*
@@ -263,6 +263,9 @@ iommu_reset(struct iommu_state *is)
 		if (sb->sb_flush)
 			printf(", STC%d enabled", i);
 	}
+
+	if (is->is_flags & IOMMU_FLUSH_CACHE)
+		IOMMUREG_WRITE(is, iommu_cache_invalidate, -1ULL);
 }
 
 /*
@@ -1807,7 +1810,7 @@ iommu_iomap_load_map(struct iommu_state *is, struct iommu_map_state *ims,
 	struct iommu_page_map *ipm = &ims->ims_map;
 	struct iommu_page_entry *e;
 	struct strbuf_ctl *sb = ims->ims_sb;
-	int i;
+	int i, slot;
 
 	if (sb->sb_flush == NULL)
 		flags &= ~BUS_DMA_STREAMING;
@@ -1820,6 +1823,14 @@ iommu_iomap_load_map(struct iommu_state *is, struct iommu_map_state *ims,
 	for (i = 0, e = ipm->ipm_map; i < ipm->ipm_pagecnt; ++i, ++e) {
 		e->ipe_va = vmaddr;
 		iommu_enter(is, sb, e->ipe_va, e->ipe_pa, flags);
+
+		/* Flush cache if necessary. */
+		slot = IOTSBSLOT(e->ipe_va, is->is_tsbsize);
+		if (is->is_flags & IOMMU_FLUSH_CACHE &&
+		    (i == (ipm->ipm_pagecnt - 1) || (slot % 8) == 7))
+			IOMMUREG_WRITE(is, iommu_cache_flush,
+			    is->is_ptsb + slot * 8);
+
 		vmaddr += PAGE_SIZE;
 	}
 
@@ -1835,11 +1846,19 @@ iommu_iomap_unload_map(struct iommu_state *is, struct iommu_map_state *ims)
 	struct iommu_page_map *ipm = &ims->ims_map;
 	struct iommu_page_entry *e;
 	struct strbuf_ctl *sb = ims->ims_sb;
-	int i;
+	int i, slot;
 
-	for (i = 0, e = ipm->ipm_map; i < ipm->ipm_pagecnt; ++i, ++e)
+	for (i = 0, e = ipm->ipm_map; i < ipm->ipm_pagecnt; ++i, ++e) {
 		iommu_remove(is, sb, e->ipe_va);
 
+		/* Flush cache if necessary. */
+		slot = IOTSBSLOT(e->ipe_va, is->is_tsbsize);
+		if (is->is_flags & IOMMU_FLUSH_CACHE &&
+		    (i == (ipm->ipm_pagecnt - 1) || (slot % 8) == 7))
+			IOMMUREG_WRITE(is, iommu_cache_flush,
+			    is->is_ptsb + slot * 8);
+	}
+
 	return (0);
 }
 
diff --git a/sys/arch/sparc64/dev/iommureg.h b/sys/arch/sparc64/dev/iommureg.h
index 53cc1de104a..153c058cf36 100644
--- a/sys/arch/sparc64/dev/iommureg.h
+++ b/sys/arch/sparc64/dev/iommureg.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: iommureg.h,v 1.15 2007/05/29 09:53:59 sobrado Exp $	*/
+/*	$OpenBSD: iommureg.h,v 1.16 2008/07/12 13:08:04 kettenis Exp $	*/
 /*	$NetBSD: iommureg.h,v 1.6 2001/07/20 00:07:13 eeh Exp $	*/
 
 /*
@@ -54,6 +54,11 @@ struct iommureg {
 	volatile u_int64_t	iommu_cr;	/* IOMMU control register */
 	volatile u_int64_t	iommu_tsb;	/* IOMMU TSB base register */
 	volatile u_int64_t	iommu_flush;	/* IOMMU flush register */
+	volatile u_int64_t	iommu_ctxflush;
+	volatile u_int64_t	iommu_reserved[28];
+	volatile u_int64_t	iommu_cache_flush;
+	volatile u_int64_t	iommu_cache_invalidate;
+	volatile u_int64_t	iommu_reserved2[30];
 };
 
 /* streaming buffer registers */
@@ -94,7 +99,7 @@ struct iommu_strbuf {
 #define IOTTE_STREAM	0x1000000000000000LL	/* Is page streamable? */
 #define	IOTTE_LOCAL	0x0800000000000000LL	/* Accesses to same bus segment? */
 #define	IOTTE_CONTEXT	0x07ff800000000000LL	/* context number */
-#define IOTTE_PAMASK	0x000007ffffffe000LL	/* Let's assume this is correct (bits 42..13) */
+#define IOTTE_PAMASK	0x00007fffffffe000LL	/* Let's assume this is correct (bits 42..13) */
 #define IOTTE_C		0x0000000000000010LL	/* Accesses to cacheable space */
 #define IOTTE_W		0x0000000000000002LL	/* Writeable */
 #define IOTTE_SOFTWARE	0x0000000000001f80LL	/* For software use (bits 12..7) */
diff --git a/sys/arch/sparc64/dev/iommuvar.h b/sys/arch/sparc64/dev/iommuvar.h
index 390f2d697bb..99d233b82de 100644
--- a/sys/arch/sparc64/dev/iommuvar.h
+++ b/sys/arch/sparc64/dev/iommuvar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: iommuvar.h,v 1.12 2008/03/09 19:27:56 kettenis Exp $	*/
+/*	$OpenBSD: iommuvar.h,v 1.13 2008/07/12 13:08:04 kettenis Exp $	*/
 /*	$NetBSD: iommuvar.h,v 1.9 2001/10/07 20:30:41 eeh Exp $	*/
 
 /*
@@ -110,6 +110,8 @@ struct iommu_state {
 	int64_t			is_cr;		/* Control register value */
 	struct mutex		is_mtx;
 	struct extent		*is_dvmamap;	/* DVMA map for this instance */
+	int			is_flags;
+#define IOMMU_FLUSH_CACHE	0x00000001
 
 	struct strbuf_ctl	*is_sb[2];	/* Streaming buffers if any */
 
diff --git a/sys/arch/sparc64/dev/psychoreg.h b/sys/arch/sparc64/dev/psychoreg.h
index 94e297588da..93a01382129 100644
--- a/sys/arch/sparc64/dev/psychoreg.h
+++ b/sys/arch/sparc64/dev/psychoreg.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: psychoreg.h,v 1.11 2006/02/06 17:19:31 jmc Exp $	*/
+/*	$OpenBSD: psychoreg.h,v 1.12 2008/07/12 13:08:04 kettenis Exp $	*/
 /*	$NetBSD: psychoreg.h,v 1.6.4.2 2001/09/13 01:14:40 thorpej Exp $ */
 
 /*
@@ -85,7 +85,7 @@ struct psychoreg {
 
 	struct iommureg psy_iommu;							/* 1fe.0000.0200,0210 */
 
-	u_int64_t	pad3[317];
+	u_int64_t	pad3[256];
 
 	u_int64_t	pcia_slot0_int;		/* PCI bus a slot 0 irq map reg */	/* 1fe.0000.0c00 */
 	u_int64_t	pcia_slot1_int;		/* PCI bus a slot 1 irq map reg */	/* 1fe.0000.0c08 */
diff --git a/sys/arch/sparc64/dev/pyro.c b/sys/arch/sparc64/dev/pyro.c
index dad704e0491..5570e623027 100644
--- a/sys/arch/sparc64/dev/pyro.c
+++ b/sys/arch/sparc64/dev/pyro.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pyro.c,v 1.13 2008/07/12 12:21:04 kettenis Exp $	*/
+/*	$OpenBSD: pyro.c,v 1.14 2008/07/12 13:08:04 kettenis Exp $	*/
 
 /*
  * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
@@ -240,6 +240,10 @@ pyro_init_iommu(struct pyro_softc *sc, struct pyro_pbm *pbm)
 		panic("couldn't malloc iommu name");
 	snprintf(name, 32, "%s dvma", sc->sc_dv.dv_xname);
 
+	/* On Oberon, we need to flush the cache. */
+	if (sc->sc_oberon)
+		is->is_flags |= IOMMU_FLUSH_CACHE;
+
 	iommu_init(name, is, tsbsize, iobase);
 }
 
diff --git a/sys/arch/sparc64/dev/schizoreg.h b/sys/arch/sparc64/dev/schizoreg.h
index ef4d5dabcf1..af4344e8026 100644
--- a/sys/arch/sparc64/dev/schizoreg.h
+++ b/sys/arch/sparc64/dev/schizoreg.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: schizoreg.h,v 1.19 2008/02/10 12:53:01 kettenis Exp $	*/
+/*	$OpenBSD: schizoreg.h,v 1.20 2008/07/12 13:08:04 kettenis Exp $	*/
 
 /*
  * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
@@ -27,9 +27,8 @@
  */
 struct schizo_pbm_regs {
 	volatile u_int64_t	_unused1[64];		/* 0x0000 - 0x01ff */
-	struct iommureg		iommu;			/* 0x0200 - 0x0217 */
-	volatile u_int64_t	iommu_ctxflush;		/* 0x0218 - 0x021f */
-	volatile u_int64_t	_unused2[444];
+	struct iommureg		iommu;			/* 0x0200 - 0x03ff */
+	volatile u_int64_t	_unused2[384];
 	volatile u_int64_t	imap[64];
 	volatile u_int64_t	_unused3[64];
 	volatile u_int64_t	iclr[64];