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Date:      Tue, 25 Oct 2016 18:01:19 +0000 (UTC)
From:      Andrew Turner <andrew@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r307944 - in head/sys/arm/ti: . am335x
Message-ID:  <201610251801.u9PI1Jq1093353@repo.freebsd.org>
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Author: andrew
Date: Tue Oct 25 18:01:19 2016
New Revision: 307944
URL: https://svnweb.freebsd.org/changeset/base/307944

Log:
  Add MULTIDELAY support to the am335x dmtimer. This will be useful for
  testing Cortex-A8 support in GENERIC.
  
  Sponsored by:	ABT Systems Ltd

Modified:
  head/sys/arm/ti/am335x/am335x_dmtimer.c
  head/sys/arm/ti/ti_machdep.c

Modified: head/sys/arm/ti/am335x/am335x_dmtimer.c
==============================================================================
--- head/sys/arm/ti/am335x/am335x_dmtimer.c	Tue Oct 25 17:57:31 2016	(r307943)
+++ head/sys/arm/ti/am335x/am335x_dmtimer.c	Tue Oct 25 18:01:19 2016	(r307944)
@@ -38,6 +38,10 @@ __FBSDID("$FreeBSD$");
 #include <sys/timetc.h>
 #include <machine/bus.h>
 
+#ifdef MULTIDELAY
+#include <machine/machdep.h> /* For arm_set_delay */
+#endif
+
 #include <dev/ofw/openfirm.h>
 #include <dev/ofw/ofw_bus.h>
 #include <dev/ofw/ofw_bus_subr.h>
@@ -67,6 +71,8 @@ struct am335x_dmtimer_softc {
 static struct am335x_dmtimer_softc *am335x_dmtimer_et_sc = NULL;
 static struct am335x_dmtimer_softc *am335x_dmtimer_tc_sc = NULL;
 
+static void am335x_dmtimer_delay(int, void *);
+
 /*
  * We use dmtimer2 for eventtimer and dmtimer3 for timecounter.
  */
@@ -235,6 +241,10 @@ am335x_dmtimer_tc_init(struct am335x_dmt
 	am335x_dmtimer_tc_sc = sc;
 	tc_init(&sc->func.tc);
 
+#ifdef MULTIDELAY
+	arm_set_delay(am335x_dmtimer_delay, sc);
+#endif
+
 	return (0);
 }
 
@@ -328,23 +338,13 @@ static devclass_t am335x_dmtimer_devclas
 DRIVER_MODULE(am335x_dmtimer, simplebus, am335x_dmtimer_driver, am335x_dmtimer_devclass, 0, 0);
 MODULE_DEPEND(am335x_dmtimer, am335x_prcm, 1, 1, 1);
 
-void
-DELAY(int usec)
+static void
+am335x_dmtimer_delay(int usec, void *arg)
 {
-	struct am335x_dmtimer_softc *sc;
+	struct am335x_dmtimer_softc *sc = arg;
 	int32_t counts;
 	uint32_t first, last;
 
-	sc = am335x_dmtimer_tc_sc;
-
-	if (sc == NULL) {
-		for (; usec > 0; usec--)
-			for (counts = 200; counts > 0; counts--)
-				/* Prevent gcc from optimizing  out the loop */
-				cpufunc_nullop();
-		return;
-	}
-
 	/* Get the number of times to count */
 	counts = (usec + 1) * (sc->sysclk_freq / 1000000);
 
@@ -361,3 +361,19 @@ DELAY(int usec)
 	}
 }
 
+#ifndef MULTIDELAY
+void
+DELAY(int usec)
+{
+	int32_t counts;
+
+	if (am335x_dmtimer_tc_sc == NULL) {
+		for (; usec > 0; usec--)
+			for (counts = 200; counts > 0; counts--)
+				/* Prevent gcc from optimizing  out the loop */
+				cpufunc_nullop();
+		return;
+	} else
+		am335x_dmtimer_delay(usec, am335x_dmtimer_tc_sc);
+}
+#endif

Modified: head/sys/arm/ti/ti_machdep.c
==============================================================================
--- head/sys/arm/ti/ti_machdep.c	Tue Oct 25 17:57:31 2016	(r307943)
+++ head/sys/arm/ti/ti_machdep.c	Tue Oct 25 18:01:19 2016	(r307944)
@@ -124,5 +124,5 @@ static platform_method_t am335x_methods[
 	PLATFORMMETHOD_END,
 };
 
-FDT_PLATFORM_DEF(am335x, "am335x", 0, "ti,am335x", 0);
+FDT_PLATFORM_DEF(am335x, "am335x", 0, "ti,am335x", 200);
 #endif

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