Module Name: src
Committed By: jmcneill
Date: Wed Jan 30 11:52:54 UTC 2013
Modified Files:
src/sys/arch/arm/broadcom: bcm2835_rng.c
Log Message:
discard initial numbers from rng, broadcom says they are "less random"
To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/arch/arm/broadcom/bcm2835_rng.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/broadcom/bcm2835_rng.c
diff -u src/sys/arch/arm/broadcom/bcm2835_rng.c:1.1 src/sys/arch/arm/broadcom/bcm2835_rng.c:1.2
--- src/sys/arch/arm/broadcom/bcm2835_rng.c:1.1 Fri Jan 25 00:04:06 2013
+++ src/sys/arch/arm/broadcom/bcm2835_rng.c Wed Jan 30 11:52:54 2013
@@ -1,4 +1,4 @@
-/* $NetBSD: bcm2835_rng.c,v 1.1 2013/01/25 00:04:06 jmcneill Exp $ */
+/* $NetBSD: bcm2835_rng.c,v 1.2 2013/01/30 11:52:54 jmcneill Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bcm2835_rng.c,v 1.1 2013/01/25 00:04:06 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bcm2835_rng.c,v 1.2 2013/01/30 11:52:54 jmcneill Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -109,6 +109,9 @@ bcmrng_attach(device_t parent, device_t
callout_init(&sc->sc_tick, CALLOUT_MPSAFE);
callout_setfunc(&sc->sc_tick, bcmrng_tick, sc);
+ /* discard initial numbers, broadcom says they are "less random" */
+ bus_space_write_4(sc->sc_iot, sc->sc_ioh, RNG_STATUS, 0x40000);
+
/* enable rng */
ctrl = bus_space_read_4(sc->sc_iot, sc->sc_ioh, RNG_CTRL);
ctrl |= RNG_CTRL_EN;
