From 9ca174a51dbb454bb10f71b3dc112a850a9f2623 Mon Sep 17 00:00:00 2001
From: thorpej <thorpej@NetBSD.org>
Date: Fri, 2 Jan 1998 22:57:56 +0000
Subject: [PATCH] Implement pmap_activate().

---
 sys/arch/sparc/include/pmap.h |  7 +++---
 sys/arch/sparc/sparc/pmap.c   | 40 ++++++++++++++++++++++++++++++++++-
 2 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/sys/arch/sparc/include/pmap.h b/sys/arch/sparc/include/pmap.h
index 042e12bf3b25..d14ef36ba286 100644
--- a/sys/arch/sparc/include/pmap.h
+++ b/sys/arch/sparc/include/pmap.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: pmap.h,v 1.30 1997/08/04 20:00:47 pk Exp $ */
+/*	$NetBSD: pmap.h,v 1.31 1998/01/02 22:57:59 thorpej Exp $ */
 
 /*
  * Copyright (c) 1996
@@ -239,14 +239,15 @@ int             pmap_dumpmmu __P((int (*)__P((dev_t, daddr_t, caddr_t, size_t)),
 #define	pmap_resident_count(pmap)	pmap_count_ptes(pmap)
 #define	managed(pa)	((unsigned)((pa) - vm_first_phys) < vm_num_phys)
 
-#define PMAP_ACTIVATE(pmap, pcb, iscurproc)
-#define PMAP_DEACTIVATE(pmap, pcb)
 #define PMAP_PREFER(fo, ap)		pmap_prefer((fo), (ap))
 
 #define PMAP_EXCLUDE_DECLS	/* tells MI pmap.h *not* to include decls */
 
 /* FUNCTION DECLARATIONS FOR COMMON PMAP MODULE */
 
+struct proc;
+void		pmap_activate __P((struct proc *));
+void		pmap_deactivate __P((struct proc *));
 void		pmap_bootstrap __P((int nmmu, int nctx, int nregion));
 int		pmap_count_ptes __P((struct pmap *));
 void		pmap_prefer __P((vm_offset_t, vm_offset_t *));
diff --git a/sys/arch/sparc/sparc/pmap.c b/sys/arch/sparc/sparc/pmap.c
index b561a573396a..9f6b198b64e6 100644
--- a/sys/arch/sparc/sparc/pmap.c
+++ b/sys/arch/sparc/sparc/pmap.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: pmap.c,v 1.103 1997/11/19 23:19:13 pk Exp $ */
+/*	$NetBSD: pmap.c,v 1.104 1998/01/02 22:57:56 thorpej Exp $ */
 
 /*
  * Copyright (c) 1996
@@ -6441,6 +6441,44 @@ pmap_redzone()
 	pmap_remove(pmap_kernel(), KERNBASE, KERNBASE+NBPG);
 }
 
+/*
+ * Activate the address space for the specified process.  If the
+ * process is the current process, load the new MMU context.
+ */
+void
+pmap_activate(p)
+	struct proc *p;
+{
+	pmap_t pmap = p->p_vmspace->vm_map.pmap;
+	int s;
+
+	/*
+	 * This is essentially the same thing that happens in cpu_switch()
+	 * when the newly selected process is about to run, except that we
+	 * have to make sure to clean the register windows before we set
+	 * the new context.
+	 */
+
+	s = splpmap();
+	if (p == curproc) {
+		write_user_windows();
+		if (pmap->pm_ctx == NULL)
+			ctx_alloc(pmap);	/* performs setcontext() */
+		else
+			setcontext(pmap->pm_ctxnum);
+	}
+	splx(s);
+}
+
+/*
+ * Deactivate the address space of the specified process.
+ */
+void
+pmap_deactivate(p)
+	struct proc *p;
+{
+}
+
 #ifdef DEBUG
 /*
  * Check consistency of a pmap (time consuming!).