[src/trunk]: src/sys/arch/x68k/dev Add rnd(9) entropy source from keyboard.

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

details:   https://anonhg.NetBSD.org/src/rev/15ac567c64f4
branches:  trunk
changeset: 368122:15ac567c64f4
user:      tsutsui <tsutsui%NetBSD.org@localhost>
date:      Sat Jun 25 00:58:36 2022 +0000

description:
Add rnd(9) entropy source from keyboard.

diffstat:

 sys/arch/x68k/dev/kbd.c |  11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diffs (53 lines):

diff -r 0722a98ac098 -r 15ac567c64f4 sys/arch/x68k/dev/kbd.c
--- a/sys/arch/x68k/dev/kbd.c   Fri Jun 24 23:44:18 2022 +0000
+++ b/sys/arch/x68k/dev/kbd.c   Sat Jun 25 00:58:36 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kbd.c,v 1.42 2022/06/24 23:44:18 tsutsui Exp $ */
+/*     $NetBSD: kbd.c,v 1.43 2022/06/25 00:58:36 tsutsui Exp $ */
 
 /*
  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kbd.c,v 1.42 2022/06/24 23:44:18 tsutsui Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kbd.c,v 1.43 2022/06/25 00:58:36 tsutsui Exp $");
 
 #include "ite.h"
 #include "bell.h"
@@ -51,6 +51,7 @@
 #include <sys/bus.h>
 #include <sys/intr.h>
 #include <sys/mutex.h>
+#include <sys/rndsource.h>
 
 #include <arch/x68k/dev/intiovar.h>
 #include <arch/x68k/dev/mfp.h>
@@ -71,6 +72,7 @@
        struct evvar sc_events; /* event queue state */
        void *sc_softintr_cookie;
        kmutex_t sc_lock;
+       krndsource_t sc_rndsource;
 };
 
 void   kbdenable(int);
@@ -141,6 +143,9 @@
        sc->sc_softintr_cookie = softint_establish(SOFTINT_SERIAL,
            kbdsoftint, sc);
 
+       rnd_attach_source(&sc->sc_rndsource, device_xname(self),
+           RND_TYPE_TTY, RND_FLAG_DEFAULT);
+
        kbdenable(1);
        sc->sc_event_mode = 0;
        sc->sc_events.ev_io = 0;
@@ -338,6 +343,8 @@
 
        c = mfp_get_udr();
 
+       rnd_add_uint32(&sc->sc_rndsource, (st << 8) | c);
+
        if ((st & MFP_RSR_BF) == 0)
                return 0;       /* intr caused by an err -- no char received */