Fix the message buffer mapping. This actually allows to increase

the message buffer size in <sys/msgbuf.h>.

Reviewed by:	davidg,joerg
Submitted by:	bde

4 files changed, 66 insertions, 68 deletions

diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index 2cf8d5f..049c86d 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -35,7 +35,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)machdep.c	7.4 (Berkeley) 6/3/91
- *	$Id: machdep.c,v 1.208 1996/10/20 18:35:32 phk Exp $
+ *	$Id: machdep.c,v 1.209 1996/10/31 00:57:25 julian Exp $
  */
 
 #include "npx.h"
@@ -203,17 +203,6 @@ cpu_startup(dummy)
 		bootverbose++;
 
 	/*
-	 * Initialize error message buffer (at end of core).
-	 */
-
-	/* avail_end was pre-decremented in init386() to compensate */
-	for (i = 0; i < btoc(sizeof (struct msgbuf)); i++)
-		pmap_enter(pmap_kernel(), (vm_offset_t)msgbufp,
-			   avail_end + i * PAGE_SIZE,
-			   VM_PROT_ALL, TRUE);
-	msgbufmapped = 1;
-
-	/*
 	 * Good {morning,afternoon,evening,night}.
 	 */
 	printf(version);
@@ -987,6 +976,7 @@ init386(first)
 	struct region_descriptor r_gdt, r_idt;
 	int	pagesinbase, pagesinext;
 	int	target_page, pa_indx;
+	int	off;
 
 	proc0.p_addr = proc0paddr;
 
@@ -1308,6 +1298,12 @@ init386(first)
 
 	/* now running on new page tables, configured,and u/iom is accessible */
 
+	/* Map the message buffer. */
+	for (off = 0; off < round_page(sizeof(struct msgbuf)); off += PAGE_SIZE)
+		pmap_enter(kernel_pmap, (vm_offset_t)msgbufp + off,
+			   avail_end + off, VM_PROT_ALL, TRUE);
+	msgbufmapped = 1;
+
 	/* make a initial tss so microp can get interrupt stack on syscall! */
 	proc0.p_addr->u_pcb.pcb_tss.tss_esp0 = (int) kstack + UPAGES*PAGE_SIZE;
 	proc0.p_addr->u_pcb.pcb_tss.tss_ss0 = GSEL(GDATA_SEL, SEL_KPL) ;
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 23de085..0ab922c 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 1.128 1996/10/23 05:31:54 dyson Exp $
+ *	$Id: pmap.c,v 1.129 1996/11/03 03:40:47 dyson Exp $
  */
 
 /*
@@ -214,6 +214,24 @@ static vm_offset_t pdstack[PDSTACKMAX];
 static int pdstackptr;
 
 /*
+ *	Routine:	pmap_pte
+ *	Function:
+ *		Extract the page table entry associated
+ *		with the given map/virtual_address pair.
+ */
+
+PMAP_INLINE unsigned *
+pmap_pte(pmap, va)
+	register pmap_t pmap;
+	vm_offset_t va;
+{
+	if (pmap && *pmap_pde(pmap, va)) {
+		return get_ptbase(pmap) + i386_btop(va);
+	}
+	return (0);
+}
+
+/*
  *	Bootstrap the system enough to run with virtual memory.
  *
  *	On the i386 this is called after mapping has already been enabled
@@ -281,14 +299,17 @@ pmap_bootstrap(firstaddr, loadaddr)
 	SYSMAP(caddr_t, CMAP2, CADDR2, 1)
 
 	/*
-	 * ptmmap is used for reading arbitrary physical pages via /dev/mem.
+	 * ptvmmap is used for reading arbitrary physical pages via /dev/mem.
+	 * XXX ptmmap is not used.
 	 */
 	SYSMAP(caddr_t, ptmmap, ptvmmap, 1)
 
 	/*
-	 * msgbufmap is used to map the system message buffer.
+	 * msgbufp is used to map the system message buffer.
+	 * XXX msgbufmap is not used.
 	 */
-	SYSMAP(struct msgbuf *, msgbufmap, msgbufp, 1)
+	SYSMAP(struct msgbuf *, msgbufmap, msgbufp,
+	       atop(round_page(sizeof(struct msgbuf))))
 
 	/*
 	 * ptemap is used for pmap_pte_quick
@@ -455,24 +476,6 @@ get_ptbase(pmap)
 }
 
 /*
- *	Routine:	pmap_pte
- *	Function:
- *		Extract the page table entry associated
- *		with the given map/virtual_address pair.
- */
-
-PMAP_INLINE unsigned *
-pmap_pte(pmap, va)
-	register pmap_t pmap;
-	vm_offset_t va;
-{
-	if (pmap && *pmap_pde(pmap, va)) {
-		return get_ptbase(pmap) + i386_btop(va);
-	}
-	return (0);
-}
-
-/*
  * Super fast pmap_pte routine best used when scanning
  * the pv lists.  This eliminates many coarse-grained
  * invltlb calls.  Note that many of the pv list
diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c
index 2cf8d5f..049c86d 100644
--- a/sys/i386/i386/machdep.c
+++ b/sys/i386/i386/machdep.c
@@ -35,7 +35,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)machdep.c	7.4 (Berkeley) 6/3/91
- *	$Id: machdep.c,v 1.208 1996/10/20 18:35:32 phk Exp $
+ *	$Id: machdep.c,v 1.209 1996/10/31 00:57:25 julian Exp $
  */
 
 #include "npx.h"
@@ -203,17 +203,6 @@ cpu_startup(dummy)
 		bootverbose++;
 
 	/*
-	 * Initialize error message buffer (at end of core).
-	 */
-
-	/* avail_end was pre-decremented in init386() to compensate */
-	for (i = 0; i < btoc(sizeof (struct msgbuf)); i++)
-		pmap_enter(pmap_kernel(), (vm_offset_t)msgbufp,
-			   avail_end + i * PAGE_SIZE,
-			   VM_PROT_ALL, TRUE);
-	msgbufmapped = 1;
-
-	/*
 	 * Good {morning,afternoon,evening,night}.
 	 */
 	printf(version);
@@ -987,6 +976,7 @@ init386(first)
 	struct region_descriptor r_gdt, r_idt;
 	int	pagesinbase, pagesinext;
 	int	target_page, pa_indx;
+	int	off;
 
 	proc0.p_addr = proc0paddr;
 
@@ -1308,6 +1298,12 @@ init386(first)
 
 	/* now running on new page tables, configured,and u/iom is accessible */
 
+	/* Map the message buffer. */
+	for (off = 0; off < round_page(sizeof(struct msgbuf)); off += PAGE_SIZE)
+		pmap_enter(kernel_pmap, (vm_offset_t)msgbufp + off,
+			   avail_end + off, VM_PROT_ALL, TRUE);
+	msgbufmapped = 1;
+
 	/* make a initial tss so microp can get interrupt stack on syscall! */
 	proc0.p_addr->u_pcb.pcb_tss.tss_esp0 = (int) kstack + UPAGES*PAGE_SIZE;
 	proc0.p_addr->u_pcb.pcb_tss.tss_ss0 = GSEL(GDATA_SEL, SEL_KPL) ;
diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c
index 23de085..0ab922c 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 1.128 1996/10/23 05:31:54 dyson Exp $
+ *	$Id: pmap.c,v 1.129 1996/11/03 03:40:47 dyson Exp $
  */
 
 /*
@@ -214,6 +214,24 @@ static vm_offset_t pdstack[PDSTACKMAX];
 static int pdstackptr;
 
 /*
+ *	Routine:	pmap_pte
+ *	Function:
+ *		Extract the page table entry associated
+ *		with the given map/virtual_address pair.
+ */
+
+PMAP_INLINE unsigned *
+pmap_pte(pmap, va)
+	register pmap_t pmap;
+	vm_offset_t va;
+{
+	if (pmap && *pmap_pde(pmap, va)) {
+		return get_ptbase(pmap) + i386_btop(va);
+	}
+	return (0);
+}
+
+/*
  *	Bootstrap the system enough to run with virtual memory.
  *
  *	On the i386 this is called after mapping has already been enabled
@@ -281,14 +299,17 @@ pmap_bootstrap(firstaddr, loadaddr)
 	SYSMAP(caddr_t, CMAP2, CADDR2, 1)
 
 	/*
-	 * ptmmap is used for reading arbitrary physical pages via /dev/mem.
+	 * ptvmmap is used for reading arbitrary physical pages via /dev/mem.
+	 * XXX ptmmap is not used.
 	 */
 	SYSMAP(caddr_t, ptmmap, ptvmmap, 1)
 
 	/*
-	 * msgbufmap is used to map the system message buffer.
+	 * msgbufp is used to map the system message buffer.
+	 * XXX msgbufmap is not used.
 	 */
-	SYSMAP(struct msgbuf *, msgbufmap, msgbufp, 1)
+	SYSMAP(struct msgbuf *, msgbufmap, msgbufp,
+	       atop(round_page(sizeof(struct msgbuf))))
 
 	/*
 	 * ptemap is used for pmap_pte_quick
@@ -455,24 +476,6 @@ get_ptbase(pmap)
 }
 
 /*
- *	Routine:	pmap_pte
- *	Function:
- *		Extract the page table entry associated
- *		with the given map/virtual_address pair.
- */
-
-PMAP_INLINE unsigned *
-pmap_pte(pmap, va)
-	register pmap_t pmap;
-	vm_offset_t va;
-{
-	if (pmap && *pmap_pde(pmap, va)) {
-		return get_ptbase(pmap) + i386_btop(va);
-	}
-	return (0);
-}
-
-/*
  * Super fast pmap_pte routine best used when scanning
  * the pv lists.  This eliminates many coarse-grained
  * invltlb calls.  Note that many of the pv list