[src/trunk]: src/sys/arch/usermode/usermode Implement pmap_copy_page()! That ...

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

details:   https://anonhg.NetBSD.org/src/rev/20e0ce49ba15
branches:  trunk
changeset: 769601:20e0ce49ba15
user:      reinoud <reinoud%NetBSD.org@localhost>
date:      Thu Sep 15 15:34:19 2011 +0000

description:
Implement pmap_copy_page()! That was missing a long time!

diffstat:

 sys/arch/usermode/usermode/pmap.c |  19 +++++++++++++++----
 1 files changed, 15 insertions(+), 4 deletions(-)

diffs (45 lines):

diff -r 74cf377eceef -r 20e0ce49ba15 sys/arch/usermode/usermode/pmap.c
--- a/sys/arch/usermode/usermode/pmap.c Thu Sep 15 15:24:39 2011 +0000
+++ b/sys/arch/usermode/usermode/pmap.c Thu Sep 15 15:34:19 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.69 2011/09/15 15:24:39 reinoud Exp $ */
+/* $NetBSD: pmap.c,v 1.70 2011/09/15 15:34:19 reinoud Exp $ */
 
 /*-
  * Copyright (c) 2011 Reinoud Zandijk <reinoud%NetBSD.org@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.69 2011/09/15 15:24:39 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.70 2011/09/15 15:34:19 reinoud Exp $");
 
 #include "opt_memsize.h"
 #include "opt_kmempages.h"
@@ -1021,13 +1021,24 @@
        memset(blob, 0, PAGE_SIZE);
        num = thunk_pwrite(mem_fh, blob, PAGE_SIZE, pa);
        if (num != PAGE_SIZE)
-               panic("pmap_zero_page couldn't write out\n");
+               panic("%s: couldn't write out\n", __func__);
 }
 
+/* XXX braindead copy page implementation but it works for now */
 void
 pmap_copy_page(paddr_t src, paddr_t dst)
 {
-dprintf_debug("pmap_copy_page not implemented\n");
+       char blob[PAGE_SIZE];
+       int num;
+
+       dprintf_debug("pmap_copy_page: pa src %p, pa dst %p\n",
+               (void *) src, (void *) dst);
+       num = thunk_pread(mem_fh, blob, PAGE_SIZE, src);
+       if (num != PAGE_SIZE)
+               panic("%s: can't read in src\n", __func__);
+       num = thunk_pwrite(mem_fh, blob, PAGE_SIZE, dst);
+       if (num != PAGE_SIZE)
+               panic("%s: couldn't write out dst\n", __func__);
 }
 
 /* change access permissions on a given physical page */