From 15d7825a5f77eea2647e578771fa0533edc0863d Mon Sep 17 00:00:00 2001
From: alc <alc@FreeBSD.org>
Date: Mon, 19 Jul 2004 05:39:49 +0000
Subject: Add partial pmap locking.

Tested by: marcel@
---
 sys/ia64/ia64/pmap.c    | 13 +++++++++++++
 sys/ia64/include/pmap.h | 14 ++++++++++++++
 2 files changed, 27 insertions(+)

(limited to 'sys/ia64')

diff --git a/sys/ia64/ia64/pmap.c b/sys/ia64/ia64/pmap.c
index f1f8149..95abc4e 100644
--- a/sys/ia64/ia64/pmap.c
+++ b/sys/ia64/ia64/pmap.c
@@ -445,6 +445,7 @@ pmap_bootstrap()
 	/*
 	 * Initialize the kernel pmap (which is statically allocated).
 	 */
+	PMAP_LOCK_INIT(kernel_pmap);
 	for (i = 0; i < 5; i++)
 		kernel_pmap->pm_rid[i] = 0;
 	kernel_pmap->pm_active = 1;
@@ -698,6 +699,7 @@ pmap_pinit(struct pmap *pmap)
 {
 	int i;
 
+	PMAP_LOCK_INIT(pmap);
 	for (i = 0; i < 5; i++)
 		pmap->pm_rid[i] = pmap_allocate_rid();
 	pmap->pm_active = 0;
@@ -722,6 +724,7 @@ pmap_release(pmap_t pmap)
 	for (i = 0; i < 5; i++)
 		if (pmap->pm_rid[i])
 			pmap_free_rid(pmap->pm_rid[i]);
+	PMAP_LOCK_DESTROY(pmap);
 }
 
 /*
@@ -1339,6 +1342,7 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
 		return;
 
 	vm_page_lock_queues();
+	PMAP_LOCK(pmap);
 	oldpmap = pmap_install(pmap);
 
 	/*
@@ -1374,6 +1378,7 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
 
 out:
 	pmap_install(oldpmap);
+	PMAP_UNLOCK(pmap);
 	vm_page_unlock_queues();
 }
 
@@ -1414,6 +1419,7 @@ pmap_remove_all(vm_page_t m)
 		pmap_t pmap = pv->pv_pmap;
 		vm_offset_t va = pv->pv_va;
 
+		PMAP_LOCK(pmap);
 		oldpmap = pmap_install(pmap);
 		pte = pmap_find_vhpt(va);
 		KASSERT(pte != NULL, ("pte"));
@@ -1422,6 +1428,7 @@ pmap_remove_all(vm_page_t m)
 		pmap_remove_pte(pmap, pte, va, pv, 1);
 		pmap_invalidate_page(pmap, va);
 		pmap_install(oldpmap);
+		PMAP_UNLOCK(pmap);
 	}
 
 	vm_page_flag_clear(m, PG_WRITEABLE);
@@ -1458,6 +1465,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
 		panic("pmap_protect: unaligned addresses");
 
 	vm_page_lock_queues();
+	PMAP_LOCK(pmap);
 	oldpmap = pmap_install(pmap);
 	while (sva < eva) {
 		/* 
@@ -1491,6 +1499,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
 		sva += PAGE_SIZE;
 	}
 	pmap_install(oldpmap);
+	PMAP_UNLOCK(pmap);
 	vm_page_unlock_queues();
 }
 
@@ -1704,6 +1713,7 @@ pmap_change_wiring(pmap, va, wired)
 	if (pmap == NULL)
 		return;
 
+	PMAP_LOCK(pmap);
 	oldpmap = pmap_install(pmap);
 
 	pte = pmap_find_vhpt(va);
@@ -1720,6 +1730,7 @@ pmap_change_wiring(pmap, va, wired)
 	pmap_pte_set_w(pte, wired);
 
 	pmap_install(oldpmap);
+	PMAP_UNLOCK(pmap);
 }
 
 
@@ -1854,6 +1865,7 @@ pmap_remove_pages(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
 #endif
 
 	vm_page_lock_queues();
+	PMAP_LOCK(pmap);
 	for (pv = TAILQ_FIRST(&pmap->pm_pvlist);
 		pv;
 		pv = npv) {
@@ -1874,6 +1886,7 @@ pmap_remove_pages(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
 	}
 
 	pmap_invalidate_all(pmap);
+	PMAP_UNLOCK(pmap);
 	vm_page_unlock_queues();
 }
 
diff --git a/sys/ia64/include/pmap.h b/sys/ia64/include/pmap.h
index af2610e..dbb0b2c 100644
--- a/sys/ia64/include/pmap.h
+++ b/sys/ia64/include/pmap.h
@@ -46,6 +46,8 @@
 #define	_MACHINE_PMAP_H_
 
 #include <sys/queue.h>
+#include <sys/_lock.h>
+#include <sys/_mutex.h>
 #include <machine/pte.h>
 
 #ifdef _KERNEL
@@ -70,6 +72,7 @@ struct md_page {
 };
 
 struct pmap {
+	struct mtx		pm_mtx;
 	TAILQ_HEAD(,pv_entry)	pm_pvlist;	/* list of mappings in pmap */
 	u_int32_t		pm_rid[5];	/* base RID for pmap */
 	int			pm_active;	/* active flag */
@@ -81,6 +84,17 @@ typedef struct pmap	*pmap_t;
 #ifdef _KERNEL
 extern struct pmap	kernel_pmap_store;
 #define kernel_pmap	(&kernel_pmap_store)
+
+#define	PMAP_LOCK(pmap)		mtx_lock(&(pmap)->pm_mtx)
+#define	PMAP_LOCK_ASSERT(pmap, type) \
+				mtx_assert(&(pmap)->pm_mtx, (type))
+#define	PMAP_LOCK_DESTROY(pmap)	mtx_destroy(&(pmap)->pm_mtx)
+#define	PMAP_LOCK_INIT(pmap)	mtx_init(&(pmap)->pm_mtx, "pmap", \
+				    NULL, MTX_DEF)
+#define	PMAP_LOCKED(pmap)	mtx_owned(&(pmap)->pm_mtx)
+#define	PMAP_MTX(pmap)		(&(pmap)->pm_mtx)
+#define	PMAP_TRYLOCK(pmap)	mtx_trylock(&(pmap)->pm_mtx)
+#define	PMAP_UNLOCK(pmap)	mtx_unlock(&(pmap)->pm_mtx)
 #endif
 
 /*
-- 
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