[src/trunk]: src/external/cddl/osnet/dev/fbt/x86 Use x86_patch_window_{open, c...

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

details:   https://anonhg.NetBSD.org/src/rev/1cf59106a802
branches:  trunk
changeset: 461015:1cf59106a802
user:      maxv <maxv%NetBSD.org@localhost>
date:      Wed Nov 13 10:13:41 2019 +0000

description:
Use x86_patch_window_{open,close}. This also fixes a bug: the CR0/PSL
reloads were inverted.

diffstat:

 external/cddl/osnet/dev/fbt/x86/fbt_isa.c |  21 ++++-----------------
 1 files changed, 4 insertions(+), 17 deletions(-)

diffs (41 lines):

diff -r 7a56fd17c4cc -r 1cf59106a802 external/cddl/osnet/dev/fbt/x86/fbt_isa.c
--- a/external/cddl/osnet/dev/fbt/x86/fbt_isa.c Wed Nov 13 10:06:38 2019 +0000
+++ b/external/cddl/osnet/dev/fbt/x86/fbt_isa.c Wed Nov 13 10:13:41 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fbt_isa.c,v 1.1 2018/05/28 23:47:39 chs Exp $  */
+/*     $NetBSD: fbt_isa.c,v 1.2 2019/11/13 10:13:41 maxv Exp $ */
 
 /*
  * CDDL HEADER START
@@ -175,28 +175,15 @@
 void
 fbt_patch_tracepoint(fbt_probe_t *fbt, fbt_patchval_t val)
 {
-       u_long psl;
-       u_long cr0;
+       u_long psl, cr0;
 
-       /* Disable interrupts. */
-       psl = x86_read_psl();
-       x86_disable_intr();
-
-       /* Disable write protection in supervisor mode. */
-       cr0 = rcr0();
-       lcr0(cr0 & ~CR0_WP);
+       x86_patch_window_open(&psl, &cr0);
 
        for (; fbt != NULL; fbt = fbt->fbtp_next) {
                *fbt->fbtp_patchpoint = val;
        }
 
-       /* Write back and invalidate cache, flush pipelines. */
-       wbinvd();
-       x86_flush();
-       x86_write_psl(psl);
-
-       /* Re-enable write protection. */
-       lcr0(cr0);
+       x86_patch_window_close(psl, cr0);
 }
 #endif