Put in place the infrastructure for improved UP and SMP TLB management.

In particular, replace the unused field pmap::pm_flag by pmap::pm_active,
which is a bit mask representing which processors have the pmap activated.
(Thus, it is a simple Boolean on UPs.)

Also, eliminate an unnecessary memory reference from cpu_switch()
in swtch.s.

Assisted by:	John S. Dyson <dyson@iquest.net>
Tested by:	Luoqi Chen <luoqi@watermarkgroup.com>,
		Poul-Henning Kamp <phk@critter.freebsd.dk>

9 files changed, 174 insertions, 69 deletions

diff --git a/sys/amd64/amd64/cpu_switch.S b/sys/amd64/amd64/cpu_switch.S
index f09c049..7e97a09 100644
--- a/sys/amd64/amd64/cpu_switch.S
+++ b/sys/amd64/amd64/cpu_switch.S
@@ -33,7 +33,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: swtch.s,v 1.76 1999/03/18 04:22:23 jlemon Exp $
+ *	$Id: swtch.s,v 1.77 1999/03/20 18:44:13 alc Exp $
  */
 
 #include "npx.h"
@@ -460,18 +460,25 @@ ENTRY(cpu_switch)
 	movb	%al, P_LASTCPU(%ecx)
 	movb	$0xff, P_ONCPU(%ecx)		/* "leave" the cpu */
 #endif /* SMP */
+	movl	P_VMSPACE(%ecx), %edx
+#ifdef SMP
+	movl	_cpuid, %eax
+#else
+	xorl	%eax, %eax
+#endif /* SMP */
+	btrl	%eax, VM_PMAP+PM_ACTIVE(%edx)
 
-	movl	P_ADDR(%ecx),%ecx
+	movl	P_ADDR(%ecx),%edx
 
 	movl	(%esp),%eax			/* Hardware registers */
-	movl	%eax,PCB_EIP(%ecx)
-	movl	%ebx,PCB_EBX(%ecx)
-	movl	%esp,PCB_ESP(%ecx)
-	movl	%ebp,PCB_EBP(%ecx)
-	movl	%esi,PCB_ESI(%ecx)
-	movl	%edi,PCB_EDI(%ecx)
-	movl	%fs,PCB_FS(%ecx)
-	movl	%gs,PCB_GS(%ecx)
+	movl	%eax,PCB_EIP(%edx)
+	movl	%ebx,PCB_EBX(%edx)
+	movl	%esp,PCB_ESP(%edx)
+	movl	%ebp,PCB_EBP(%edx)
+	movl	%esi,PCB_ESI(%edx)
+	movl	%edi,PCB_EDI(%edx)
+	movl	%fs,PCB_FS(%edx)
+	movl	%gs,PCB_GS(%edx)
 
 #ifdef SMP
 	movl	_mp_lock, %eax
@@ -481,16 +488,15 @@ ENTRY(cpu_switch)
 	je	badsw4				/* yes, bad medicine! */
 #endif /* DIAGNOSTIC */
 	andl	$COUNT_FIELD, %eax		/* clear CPU portion */
-	movl	%eax, PCB_MPNEST(%ecx)		/* store it */
+	movl	%eax, PCB_MPNEST(%edx)		/* store it */
 #endif /* SMP */
 
 #if NNPX > 0
 	/* have we used fp, and need a save? */
-	movl	_curproc,%eax
-	cmpl	%eax,_npxproc
+	cmpl	%ecx,_npxproc
 	jne	1f
-	addl	$PCB_SAVEFPU,%ecx		/* h/w bugs make saving complicated */
-	pushl	%ecx
+	addl	$PCB_SAVEFPU,%edx		/* h/w bugs make saving complicated */
+	pushl	%edx
 	call	_npxsave			/* do it in a big C function */
 	popl	%eax
 1:
@@ -678,6 +684,13 @@ swtch_com:
 	ltr	%si
 3:
 #endif /* VM86 */
+	movl	P_VMSPACE(%ecx), %ebx
+#ifdef SMP
+	movl	_cpuid, %eax
+#else
+	xorl	%eax, %eax
+#endif
+	btsl	%eax, VM_PMAP+PM_ACTIVE(%ebx)
 
 	/* restore context */
 	movl	PCB_EBX(%edx),%ebx
diff --git a/sys/amd64/amd64/genassym.c b/sys/amd64/amd64/genassym.c
index 25ea72f..539f3e2 100644
--- a/sys/amd64/amd64/genassym.c
+++ b/sys/amd64/amd64/genassym.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)genassym.c	5.11 (Berkeley) 5/10/91
- *	$Id: genassym.c,v 1.63 1999/02/22 15:13:34 bde Exp $
+ *	$Id: genassym.c,v 1.64 1999/02/28 10:53:28 bde Exp $
  */
 
 #include "opt_vm86.h"
@@ -84,6 +84,7 @@ main()
 	printf("#define\tP_BACK %#x\n", OS(proc, p_procq.tqe_prev));
 	printf("#define\tP_VMSPACE %#x\n", OS(proc, p_vmspace));
 	printf("#define\tVM_PMAP %#x\n", OS(vmspace, vm_pmap));
+	printf("#define\tPM_ACTIVE %#x\n", OS(pmap, pm_active));
 	printf("#define\tP_ADDR %#x\n", OS(proc, p_addr));
 	printf("#define\tP_PRI %#x\n", OS(proc, p_priority));
 	printf("#define\tP_RTPRIO_TYPE %#x\n", OS(proc, p_rtprio.type));
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 92d56ef..ec6c00c 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -39,7 +39,7 @@
  * SUCH DAMAGE.
  *
  *	from:	@(#)pmap.c	7.7 (Berkeley)	5/12/91
- *	$Id: pmap.c,v 1.224 1999/03/05 08:05:44 alc Exp $
+ *	$Id: pmap.c,v 1.225 1999/03/13 07:31:29 alc Exp $
  */
 
 /*
@@ -329,8 +329,8 @@ pmap_bootstrap(firstaddr, loadaddr)
 	kernel_pmap = &kernel_pmap_store;
 
 	kernel_pmap->pm_pdir = (pd_entry_t *) (KERNBASE + (u_int)IdlePTD);
-
 	kernel_pmap->pm_count = 1;
+	kernel_pmap->pm_active = -1;	/* don't allow deactivation */
 	TAILQ_INIT(&kernel_pmap->pm_pvlist);
 	nkpt = NKPT;
 
@@ -734,6 +734,34 @@ invltlb_1pg( vm_offset_t va) {
 	}
 }
 
+static __inline void
+pmap_TLB_invalidate(pmap_t pmap, vm_offset_t va)
+{
+#if defined(SMP)
+	if (pmap->pm_active & (1 << cpuid))
+		cpu_invlpg((void *)va);
+	if (pmap->pm_active & other_cpus)
+		smp_invltlb();
+#else
+	if (pmap->pm_active)
+		invltlb_1pg(va);
+#endif
+}
+
+static __inline void
+pmap_TLB_invalidate_all(pmap_t pmap)
+{
+#if defined(SMP)
+	if (pmap->pm_active & (1 << cpuid))
+		cpu_invltlb();
+	if (pmap->pm_active & other_cpus)
+		smp_invltlb();
+#else
+	if (pmap->pm_active)
+		invltlb();
+#endif
+}
+
 static unsigned *
 get_ptbase(pmap)
 	pmap_t pmap;
@@ -1196,8 +1224,8 @@ pmap_pinit0(pmap)
 	pmap->pm_pdir =
 		(pd_entry_t *)kmem_alloc_pageable(kernel_map, PAGE_SIZE);
 	pmap_kenter((vm_offset_t) pmap->pm_pdir, (vm_offset_t) IdlePTD);
-	pmap->pm_flags = 0;
 	pmap->pm_count = 1;
+	pmap->pm_active = 0;
 	pmap->pm_ptphint = NULL;
 	TAILQ_INIT(&pmap->pm_pvlist);
 	bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
@@ -1260,8 +1288,8 @@ pmap_pinit(pmap)
 	*(unsigned *) (pmap->pm_pdir + PTDPTDI) =
 		VM_PAGE_TO_PHYS(ptdpg) | PG_V | PG_RW | PG_A | PG_M;
 
-	pmap->pm_flags = 0;
 	pmap->pm_count = 1;
+	pmap->pm_active = 0;
 	pmap->pm_ptphint = NULL;
 	TAILQ_INIT(&pmap->pm_pvlist);
 	bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
@@ -3391,11 +3419,18 @@ pmap_mincore(pmap, addr)
 void
 pmap_activate(struct proc *p)
 {
+	pmap_t	pmap;
+
+	pmap = vmspace_pmap(p->p_vmspace);
+#if defined(SMP)
+	pmap->pm_active |= 1 << cpuid;
+#else
+	pmap->pm_active |= 1;
+#endif
 #if defined(SWTCH_OPTIM_STATS)
 	tlb_flush_count++;
 #endif
-	load_cr3(p->p_addr->u_pcb.pcb_cr3 =
-		vtophys(vmspace_pmap(p->p_vmspace)->pm_pdir));
+	load_cr3(p->p_addr->u_pcb.pcb_cr3 = vtophys(pmap->pm_pdir));
 }
 
 vm_offset_t
diff --git a/sys/amd64/amd64/swtch.s b/sys/amd64/amd64/swtch.s
index f09c049..7e97a09 100644
--- a/sys/amd64/amd64/swtch.s
+++ b/sys/amd64/amd64/swtch.s
@@ -33,7 +33,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: swtch.s,v 1.76 1999/03/18 04:22:23 jlemon Exp $
+ *	$Id: swtch.s,v 1.77 1999/03/20 18:44:13 alc Exp $
  */
 
 #include "npx.h"
@@ -460,18 +460,25 @@ ENTRY(cpu_switch)
 	movb	%al, P_LASTCPU(%ecx)
 	movb	$0xff, P_ONCPU(%ecx)		/* "leave" the cpu */
 #endif /* SMP */
+	movl	P_VMSPACE(%ecx), %edx
+#ifdef SMP
+	movl	_cpuid, %eax
+#else
+	xorl	%eax, %eax
+#endif /* SMP */
+	btrl	%eax, VM_PMAP+PM_ACTIVE(%edx)
 
-	movl	P_ADDR(%ecx),%ecx
+	movl	P_ADDR(%ecx),%edx
 
 	movl	(%esp),%eax			/* Hardware registers */
-	movl	%eax,PCB_EIP(%ecx)
-	movl	%ebx,PCB_EBX(%ecx)
-	movl	%esp,PCB_ESP(%ecx)
-	movl	%ebp,PCB_EBP(%ecx)
-	movl	%esi,PCB_ESI(%ecx)
-	movl	%edi,PCB_EDI(%ecx)
-	movl	%fs,PCB_FS(%ecx)
-	movl	%gs,PCB_GS(%ecx)
+	movl	%eax,PCB_EIP(%edx)
+	movl	%ebx,PCB_EBX(%edx)
+	movl	%esp,PCB_ESP(%edx)
+	movl	%ebp,PCB_EBP(%edx)
+	movl	%esi,PCB_ESI(%edx)
+	movl	%edi,PCB_EDI(%edx)
+	movl	%fs,PCB_FS(%edx)
+	movl	%gs,PCB_GS(%edx)
 
 #ifdef SMP
 	movl	_mp_lock, %eax
@@ -481,16 +488,15 @@ ENTRY(cpu_switch)
 	je	badsw4				/* yes, bad medicine! */
 #endif /* DIAGNOSTIC */
 	andl	$COUNT_FIELD, %eax		/* clear CPU portion */
-	movl	%eax, PCB_MPNEST(%ecx)		/* store it */
+	movl	%eax, PCB_MPNEST(%edx)		/* store it */
 #endif /* SMP */
 
 #if NNPX > 0
 	/* have we used fp, and need a save? */
-	movl	_curproc,%eax
-	cmpl	%eax,_npxproc
+	cmpl	%ecx,_npxproc
 	jne	1f
-	addl	$PCB_SAVEFPU,%ecx		/* h/w bugs make saving complicated */
-	pushl	%ecx
+	addl	$PCB_SAVEFPU,%edx		/* h/w bugs make saving complicated */
+	pushl	%edx
 	call	_npxsave			/* do it in a big C function */
 	popl	%eax
 1:
@@ -678,6 +684,13 @@ swtch_com:
 	ltr	%si
 3:
 #endif /* VM86 */
+	movl	P_VMSPACE(%ecx), %ebx
+#ifdef SMP
+	movl	_cpuid, %eax
+#else
+	xorl	%eax, %eax
+#endif
+	btsl	%eax, VM_PMAP+PM_ACTIVE(%ebx)
 
 	/* restore context */
 	movl	PCB_EBX(%edx),%ebx
diff --git a/sys/amd64/include/pmap.h b/sys/amd64/include/pmap.h
index 79350a5..f6cd46f 100644
--- a/sys/amd64/include/pmap.h
+++ b/sys/amd64/include/pmap.h
@@ -42,7 +42,7 @@
  *
  *	from: hp300: @(#)pmap.h	7.2 (Berkeley) 12/16/90
  *	from: @(#)pmap.h	7.4 (Berkeley) 5/12/91
- * 	$Id: pmap.h,v 1.58 1999/03/02 16:20:39 dg Exp $
+ * 	$Id: pmap.h,v 1.59 1999/03/11 18:28:46 dg Exp $
  */
 
 #ifndef _MACHINE_PMAP_H_
@@ -199,16 +199,13 @@ struct pmap {
 	vm_object_t		pm_pteobj;	/* Container for pte's */
 	TAILQ_HEAD(,pv_entry)	pm_pvlist;	/* list of mappings in pmap */
 	int			pm_count;	/* reference count */
-	int			pm_flags;	/* pmap flags */
+	int			pm_active;	/* active on cpus */
 	struct pmap_statistics	pm_stats;	/* pmap statistics */
 	struct	vm_page		*pm_ptphint;	/* pmap ptp hint */
 };
 
 #define pmap_resident_count(pmap) (pmap)->pm_stats.resident_count
 
-#define PM_FLAG_LOCKED	0x1
-#define PM_FLAG_WANTED	0x2
-
 typedef struct pmap	*pmap_t;
 
 #ifdef KERNEL
diff --git a/sys/i386/i386/genassym.c b/sys/i386/i386/genassym.c
index 25ea72f..539f3e2 100644
--- a/sys/i386/i386/genassym.c
+++ b/sys/i386/i386/genassym.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)genassym.c	5.11 (Berkeley) 5/10/91
- *	$Id: genassym.c,v 1.63 1999/02/22 15:13:34 bde Exp $
+ *	$Id: genassym.c,v 1.64 1999/02/28 10:53:28 bde Exp $
  */
 
 #include "opt_vm86.h"
@@ -84,6 +84,7 @@ main()
 	printf("#define\tP_BACK %#x\n", OS(proc, p_procq.tqe_prev));
 	printf("#define\tP_VMSPACE %#x\n", OS(proc, p_vmspace));
 	printf("#define\tVM_PMAP %#x\n", OS(vmspace, vm_pmap));
+	printf("#define\tPM_ACTIVE %#x\n", OS(pmap, pm_active));
 	printf("#define\tP_ADDR %#x\n", OS(proc, p_addr));
 	printf("#define\tP_PRI %#x\n", OS(proc, p_priority));
 	printf("#define\tP_RTPRIO_TYPE %#x\n", OS(proc, p_rtprio.type));
diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c
index 92d56ef..ec6c00c 100644
--- a/sys/i386/i386/pmap.c
+++ b/sys/i386/i386/pmap.c
@@ -39,7 +39,7 @@
  * SUCH DAMAGE.
  *
  *	from:	@(#)pmap.c	7.7 (Berkeley)	5/12/91
- *	$Id: pmap.c,v 1.224 1999/03/05 08:05:44 alc Exp $
+ *	$Id: pmap.c,v 1.225 1999/03/13 07:31:29 alc Exp $
  */
 
 /*
@@ -329,8 +329,8 @@ pmap_bootstrap(firstaddr, loadaddr)
 	kernel_pmap = &kernel_pmap_store;
 
 	kernel_pmap->pm_pdir = (pd_entry_t *) (KERNBASE + (u_int)IdlePTD);
-
 	kernel_pmap->pm_count = 1;
+	kernel_pmap->pm_active = -1;	/* don't allow deactivation */
 	TAILQ_INIT(&kernel_pmap->pm_pvlist);
 	nkpt = NKPT;
 
@@ -734,6 +734,34 @@ invltlb_1pg( vm_offset_t va) {
 	}
 }
 
+static __inline void
+pmap_TLB_invalidate(pmap_t pmap, vm_offset_t va)
+{
+#if defined(SMP)
+	if (pmap->pm_active & (1 << cpuid))
+		cpu_invlpg((void *)va);
+	if (pmap->pm_active & other_cpus)
+		smp_invltlb();
+#else
+	if (pmap->pm_active)
+		invltlb_1pg(va);
+#endif
+}
+
+static __inline void
+pmap_TLB_invalidate_all(pmap_t pmap)
+{
+#if defined(SMP)
+	if (pmap->pm_active & (1 << cpuid))
+		cpu_invltlb();
+	if (pmap->pm_active & other_cpus)
+		smp_invltlb();
+#else
+	if (pmap->pm_active)
+		invltlb();
+#endif
+}
+
 static unsigned *
 get_ptbase(pmap)
 	pmap_t pmap;
@@ -1196,8 +1224,8 @@ pmap_pinit0(pmap)
 	pmap->pm_pdir =
 		(pd_entry_t *)kmem_alloc_pageable(kernel_map, PAGE_SIZE);
 	pmap_kenter((vm_offset_t) pmap->pm_pdir, (vm_offset_t) IdlePTD);
-	pmap->pm_flags = 0;
 	pmap->pm_count = 1;
+	pmap->pm_active = 0;
 	pmap->pm_ptphint = NULL;
 	TAILQ_INIT(&pmap->pm_pvlist);
 	bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
@@ -1260,8 +1288,8 @@ pmap_pinit(pmap)
 	*(unsigned *) (pmap->pm_pdir + PTDPTDI) =
 		VM_PAGE_TO_PHYS(ptdpg) | PG_V | PG_RW | PG_A | PG_M;
 
-	pmap->pm_flags = 0;
 	pmap->pm_count = 1;
+	pmap->pm_active = 0;
 	pmap->pm_ptphint = NULL;
 	TAILQ_INIT(&pmap->pm_pvlist);
 	bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
@@ -3391,11 +3419,18 @@ pmap_mincore(pmap, addr)
 void
 pmap_activate(struct proc *p)
 {
+	pmap_t	pmap;
+
+	pmap = vmspace_pmap(p->p_vmspace);
+#if defined(SMP)
+	pmap->pm_active |= 1 << cpuid;
+#else
+	pmap->pm_active |= 1;
+#endif
 #if defined(SWTCH_OPTIM_STATS)
 	tlb_flush_count++;
 #endif
-	load_cr3(p->p_addr->u_pcb.pcb_cr3 =
-		vtophys(vmspace_pmap(p->p_vmspace)->pm_pdir));
+	load_cr3(p->p_addr->u_pcb.pcb_cr3 = vtophys(pmap->pm_pdir));
 }
 
 vm_offset_t
diff --git a/sys/i386/i386/swtch.s b/sys/i386/i386/swtch.s
index f09c049..7e97a09 100644
--- a/sys/i386/i386/swtch.s
+++ b/sys/i386/i386/swtch.s
@@ -33,7 +33,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: swtch.s,v 1.76 1999/03/18 04:22:23 jlemon Exp $
+ *	$Id: swtch.s,v 1.77 1999/03/20 18:44:13 alc Exp $
  */
 
 #include "npx.h"
@@ -460,18 +460,25 @@ ENTRY(cpu_switch)
 	movb	%al, P_LASTCPU(%ecx)
 	movb	$0xff, P_ONCPU(%ecx)		/* "leave" the cpu */
 #endif /* SMP */
+	movl	P_VMSPACE(%ecx), %edx
+#ifdef SMP
+	movl	_cpuid, %eax
+#else
+	xorl	%eax, %eax
+#endif /* SMP */
+	btrl	%eax, VM_PMAP+PM_ACTIVE(%edx)
 
-	movl	P_ADDR(%ecx),%ecx
+	movl	P_ADDR(%ecx),%edx
 
 	movl	(%esp),%eax			/* Hardware registers */
-	movl	%eax,PCB_EIP(%ecx)
-	movl	%ebx,PCB_EBX(%ecx)
-	movl	%esp,PCB_ESP(%ecx)
-	movl	%ebp,PCB_EBP(%ecx)
-	movl	%esi,PCB_ESI(%ecx)
-	movl	%edi,PCB_EDI(%ecx)
-	movl	%fs,PCB_FS(%ecx)
-	movl	%gs,PCB_GS(%ecx)
+	movl	%eax,PCB_EIP(%edx)
+	movl	%ebx,PCB_EBX(%edx)
+	movl	%esp,PCB_ESP(%edx)
+	movl	%ebp,PCB_EBP(%edx)
+	movl	%esi,PCB_ESI(%edx)
+	movl	%edi,PCB_EDI(%edx)
+	movl	%fs,PCB_FS(%edx)
+	movl	%gs,PCB_GS(%edx)
 
 #ifdef SMP
 	movl	_mp_lock, %eax
@@ -481,16 +488,15 @@ ENTRY(cpu_switch)
 	je	badsw4				/* yes, bad medicine! */
 #endif /* DIAGNOSTIC */
 	andl	$COUNT_FIELD, %eax		/* clear CPU portion */
-	movl	%eax, PCB_MPNEST(%ecx)		/* store it */
+	movl	%eax, PCB_MPNEST(%edx)		/* store it */
 #endif /* SMP */
 
 #if NNPX > 0
 	/* have we used fp, and need a save? */
-	movl	_curproc,%eax
-	cmpl	%eax,_npxproc
+	cmpl	%ecx,_npxproc
 	jne	1f
-	addl	$PCB_SAVEFPU,%ecx		/* h/w bugs make saving complicated */
-	pushl	%ecx
+	addl	$PCB_SAVEFPU,%edx		/* h/w bugs make saving complicated */
+	pushl	%edx
 	call	_npxsave			/* do it in a big C function */
 	popl	%eax
 1:
@@ -678,6 +684,13 @@ swtch_com:
 	ltr	%si
 3:
 #endif /* VM86 */
+	movl	P_VMSPACE(%ecx), %ebx
+#ifdef SMP
+	movl	_cpuid, %eax
+#else
+	xorl	%eax, %eax
+#endif
+	btsl	%eax, VM_PMAP+PM_ACTIVE(%ebx)
 
 	/* restore context */
 	movl	PCB_EBX(%edx),%ebx
diff --git a/sys/i386/include/pmap.h b/sys/i386/include/pmap.h
index 79350a5..f6cd46f 100644
--- a/sys/i386/include/pmap.h
+++ b/sys/i386/include/pmap.h
@@ -42,7 +42,7 @@
  *
  *	from: hp300: @(#)pmap.h	7.2 (Berkeley) 12/16/90
  *	from: @(#)pmap.h	7.4 (Berkeley) 5/12/91
- * 	$Id: pmap.h,v 1.58 1999/03/02 16:20:39 dg Exp $
+ * 	$Id: pmap.h,v 1.59 1999/03/11 18:28:46 dg Exp $
  */
 
 #ifndef _MACHINE_PMAP_H_
@@ -199,16 +199,13 @@ struct pmap {
 	vm_object_t		pm_pteobj;	/* Container for pte's */
 	TAILQ_HEAD(,pv_entry)	pm_pvlist;	/* list of mappings in pmap */
 	int			pm_count;	/* reference count */
-	int			pm_flags;	/* pmap flags */
+	int			pm_active;	/* active on cpus */
 	struct pmap_statistics	pm_stats;	/* pmap statistics */
 	struct	vm_page		*pm_ptphint;	/* pmap ptp hint */
 };
 
 #define pmap_resident_count(pmap) (pmap)->pm_stats.resident_count
 
-#define PM_FLAG_LOCKED	0x1
-#define PM_FLAG_WANTED	0x2
-
 typedef struct pmap	*pmap_t;
 
 #ifdef KERNEL