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From: Oleksandr Tymoshenko <gonzo@FreeBSD.org>
Date: Thu, 25 Jun 2009 02:15:04 +0000 (UTC)
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Subject: svn commit: r194938 - projects/mips/sys/mips/mips
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Author: gonzo
Date: Thu Jun 25 02:15:04 2009
New Revision: 194938
URL: http://svn.freebsd.org/changeset/base/194938

Log:
  - Invalidate cache in pmap_qenter. Fixes corruption of data
      that comes through pipe (may be other bugs)

Modified:
  projects/mips/sys/mips/mips/pmap.c

Modified: projects/mips/sys/mips/mips/pmap.c
==============================================================================
--- projects/mips/sys/mips/mips/pmap.c	Thu Jun 25 02:14:47 2009	(r194937)
+++ projects/mips/sys/mips/mips/pmap.c	Thu Jun 25 02:15:04 2009	(r194938)
@@ -744,11 +744,14 @@ void
 pmap_qenter(vm_offset_t va, vm_page_t *m, int count)
 {
 	int i;
+	vm_offset_t origva = va;
 
 	for (i = 0; i < count; i++) {
 		pmap_kenter(va, VM_PAGE_TO_PHYS(m[i]));
 		va += PAGE_SIZE;
 	}
+
+	mips_dcache_wbinv_range_index(origva, PAGE_SIZE*count);
 }
 
 /*
@@ -758,6 +761,11 @@ pmap_qenter(vm_offset_t va, vm_page_t *m
 void
 pmap_qremove(vm_offset_t va, int count)
 {
+	/*
+	 * No need to wb/inv caches here, 
+	 *   pmap_kremove will do it for us
+	 */
+
 	while (count-- > 0) {
 		pmap_kremove(va);
 		va += PAGE_SIZE;