[src/trunk]: src/sys/arch/powerpc/ibm4xx In pmap_enter(), sync the instructio...

[simonb <simonb%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/50c8881141c2
branches:  trunk
changeset: 517060:50c8881141c2
user:      simonb <simonb%NetBSD.org@localhost>
date:      Tue Nov 06 04:49:49 2001 +0000

description:
In pmap_enter(), sync the instruction cache if VM_PROT_EXECUTE.  Fixes
problems when executing programs where text is copied to a page without
a dma sync (like NFS data bcopy'd to a buffer cache page).

>From discussion with Jason Thorpe and Eduardo Horvath.

diffstat:

 sys/arch/powerpc/ibm4xx/pmap.c |  7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diffs (21 lines):

diff -r 0113236b23a6 -r 50c8881141c2 sys/arch/powerpc/ibm4xx/pmap.c
--- a/sys/arch/powerpc/ibm4xx/pmap.c    Tue Nov 06 03:18:53 2001 +0000
+++ b/sys/arch/powerpc/ibm4xx/pmap.c    Tue Nov 06 04:49:49 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.5 2001/09/11 04:35:43 eeh Exp $     */
+/*     $NetBSD: pmap.c,v 1.6 2001/11/06 04:49:49 simonb Exp $  */
 
 /*
  * Copyright 2001 Wasabi Systems, Inc.
@@ -935,6 +935,11 @@
                ppc4xx_tlb_enter(pm->pm_ctx, va, tte);
        }
        splx(s);
+
+       /* Flush the real memory from the instruction cache. */
+       if ((prot & VM_PROT_EXECUTE) && (tte & TTE_I) == 0)
+               __syncicache((void *)pa, PAGE_SIZE);
+
        return 0;
 }