- Add watchdog driver for Cavium Octeon. At the moment only

    UP systems are supported.

3 files changed, 308 insertions, 0 deletions

diff --git a/sys/mips/cavium/files.octeon1 b/sys/mips/cavium/files.octeon1
index 9bd8837..de2273a 100644
--- a/sys/mips/cavium/files.octeon1
+++ b/sys/mips/cavium/files.octeon1
@@ -16,6 +16,8 @@ mips/mips/intr_machdep.c			standard
 mips/mips/tick.c				standard
 
 mips/cavium/octeon_rnd.c			optional random
+mips/cavium/octeon_wdog.c			optional octeon_wdog
+mips/cavium/octeon_nmi.S			optional octeon_wdog
 
 mips/cavium/cryptocteon/cavium_crypto.c		optional cryptocteon
 mips/cavium/cryptocteon/cryptocteon.c		optional cryptocteon
diff --git a/sys/mips/cavium/octeon_nmi.S b/sys/mips/cavium/octeon_nmi.S
new file mode 100644
index 0000000..6e37623
--- /dev/null
+++ b/sys/mips/cavium/octeon_nmi.S
@@ -0,0 +1,47 @@
+/*-
+ * Copyright (c) 2010 Oleksandr Tymoshenko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <machine/asm.h>
+
+.set noreorder
+ 
+/*
+ * Only first 128 bytes of handler is used
+ */
+NESTED_NOPROFILE(octeon_wdog_nmi_handler, 32, ra)
+        .set    push
+        .set    noat
+        PTR_LA  k0, _C_LABEL(octeon_wdog_nmi)
+	jr	k0
+	nop
+1:
+	nop
+	j 1b
+	nop
+        .set    at
+END(octeon_wdog_nmi_handler)
diff --git a/sys/mips/cavium/octeon_wdog.c b/sys/mips/cavium/octeon_wdog.c
new file mode 100644
index 0000000..23354e6
--- /dev/null
+++ b/sys/mips/cavium/octeon_wdog.c
@@ -0,0 +1,259 @@
+/*-
+ * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Watchdog driver for Cavium Octeon
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/watchdog.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/sysctl.h>
+#include <sys/rman.h>
+#include <sys/smp.h>
+
+#include <contrib/octeon-sdk/cvmx.h>
+#include <contrib/octeon-sdk/cvmx-interrupt.h>
+
+#define	DEFAULT_TIMER_VAL	65535
+
+struct octeon_wdog_softc {
+	device_t dev;
+	/* XXX: replace with repscive CVMX_ constant */
+	struct resource *irq_res[16];
+	void *intr_hdl[16];
+	int armed;
+	int debug;
+};
+
+extern void octeon_wdog_nmi_handler(void);
+void octeon_wdog_nmi(void);
+
+static void octeon_watchdog_arm_core(int core, unsigned long timer_val);
+static void octeon_watchdog_disarm_core(int core);
+static int octeon_wdog_attach(device_t dev);
+static void octeon_wdog_identify(driver_t *drv, device_t parent);
+static int octeon_wdog_intr(void *);;
+static int octeon_wdog_probe(device_t dev);
+static void octeon_wdog_setup(struct octeon_wdog_softc *sc, int cpu);
+static void octeon_wdog_sysctl(device_t dev);
+static void octeon_wdog_watchdog_fn(void *private, u_int cmd, int *error);
+
+void
+octeon_wdog_nmi()
+{
+
+	/* XXX: Add something useful here */
+	printf("NMI detected\n");
+
+	/* 
+	 * This is the end 
+	 * Beautiful friend 
+	 *
+	 * Just wait for Soft Reset to come and take us
+	 */
+	for (;;)
+		;
+}
+
+static void 
+octeon_watchdog_arm_core(int core, unsigned long timer_val)
+{
+	cvmx_ciu_wdogx_t ciu_wdog;
+
+	/* Poke it! */
+	cvmx_write_csr(CVMX_CIU_PP_POKEX(core), 1);
+
+	ciu_wdog.u64 = 0;
+	ciu_wdog.s.len = timer_val;
+	ciu_wdog.s.mode = 3;
+	cvmx_write_csr(CVMX_CIU_WDOGX(core), ciu_wdog.u64);
+}
+
+static void 
+octeon_watchdog_disarm_core(int core)
+{
+
+	cvmx_write_csr(CVMX_CIU_WDOGX(core), 0);
+}
+
+
+
+static void
+octeon_wdog_watchdog_fn(void *private, u_int cmd, int *error)
+{
+	struct octeon_wdog_softc *sc = private;
+	uint64_t timer_val = 0;
+
+	cmd &= WD_INTERVAL;
+	if (sc->debug)
+		device_printf(sc->dev, "octeon_wdog_watchdog_fn: cmd: %x\n", cmd);
+	if (cmd > 0) {
+		if (sc->debug)
+			device_printf(sc->dev, "octeon_wdog_watchdog_fn: programming timer: %jx\n", (uintmax_t) timer_val);
+		/* 
+		 * XXX: This should be done for every core and with value 
+		 * calculated based on CPU frquency
+		 */
+		octeon_watchdog_arm_core(cvmx_get_core_num(), DEFAULT_TIMER_VAL);
+		sc->armed = 1;
+		*error = 0;
+	} else {
+		if (sc->debug)
+			device_printf(sc->dev, "octeon_wdog_watchdog_fn: disarming\n");
+		if (sc->armed) {
+			sc->armed = 0;
+		 	/* XXX: This should be done for every core */
+			octeon_watchdog_disarm_core(cvmx_get_core_num());
+		}
+	}
+}
+
+static void
+octeon_wdog_sysctl(device_t dev)
+{
+	struct octeon_wdog_softc *sc = device_get_softc(dev);
+
+        struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
+        struct sysctl_oid *tree = device_get_sysctl_tree(sc->dev);
+
+        SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
+                "debug", CTLFLAG_RW, &sc->debug, 0,
+                "enable watchdog debugging");
+        SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
+                "armed", CTLFLAG_RD, &sc->armed, 0,
+                "whether the watchdog is armed");
+}
+
+static void
+octeon_wdog_setup(struct octeon_wdog_softc *sc, int cpu)
+{
+	int core, rid, err;
+
+	/* XXX: map cpu id to core here ? */
+	core = cvmx_get_core_num();
+
+	/* Interrupt part */
+	rid = 0;
+	sc->irq_res[core] =
+		bus_alloc_resource(sc->dev, SYS_RES_IRQ, &rid,
+			CVMX_IRQ_WDOG0+core, 
+			CVMX_IRQ_WDOG0+core, 1, RF_ACTIVE);
+	if (!(sc->irq_res[core]))
+		goto error;
+
+	err = bus_setup_intr(sc->dev, sc->irq_res[core], INTR_TYPE_MISC,
+	    octeon_wdog_intr, NULL, sc, &sc->intr_hdl[core]);
+	if (err)
+		goto error;
+
+	/* XXX: pin interrupt handler to the respective core */
+
+	/* Disarm by default */
+	octeon_watchdog_disarm_core(core);
+
+	return;
+
+error:
+	panic("failed to setup watchdog interrupt for core %d", core);
+}
+
+
+static int
+octeon_wdog_intr(void *sc)
+{
+
+	/* Poke it! */
+	cvmx_write_csr(CVMX_CIU_PP_POKEX(cvmx_get_core_num()), 1);
+
+	return (FILTER_HANDLED);
+}
+
+static int
+octeon_wdog_probe(device_t dev)
+{
+
+	device_set_desc(dev, "Cavium Octeon watchdog timer");
+	return (0);
+}
+
+static int
+octeon_wdog_attach(device_t dev)
+{
+	struct octeon_wdog_softc *sc = device_get_softc(dev);
+	int i;
+	uint64_t *nmi_handler = (uint64_t*)octeon_wdog_nmi_handler;
+	
+	/* Initialise */
+	sc->armed = 0;
+	sc->debug = 0;
+
+	sc->dev = dev;
+	EVENTHANDLER_REGISTER(watchdog_list, octeon_wdog_watchdog_fn, sc, 0);
+	octeon_wdog_sysctl(dev);
+
+	for (i = 0; i < 16; i++) {
+		cvmx_write_csr(CVMX_MIO_BOOT_LOC_ADR, i * 8);
+		cvmx_write_csr(CVMX_MIO_BOOT_LOC_DAT, nmi_handler[i]);
+        }
+
+	cvmx_write_csr(CVMX_MIO_BOOT_LOC_CFGX(0), 0x81fc0000);
+
+	/* XXX: This should be done for every core */
+	octeon_wdog_setup(sc, cvmx_get_core_num());
+	return (0);
+}
+
+static void
+octeon_wdog_identify(driver_t *drv, device_t parent)
+{
+
+	BUS_ADD_CHILD(parent, 0, "octeon_wdog", 0);
+}
+
+static device_method_t octeon_wdog_methods[] = {
+	DEVMETHOD(device_identify, octeon_wdog_identify),
+
+	DEVMETHOD(device_probe, octeon_wdog_probe),
+	DEVMETHOD(device_attach, octeon_wdog_attach),
+	{0, 0},
+};
+
+static driver_t octeon_wdog_driver = {
+	"octeon_wdog",
+	octeon_wdog_methods,
+	sizeof(struct octeon_wdog_softc),
+};
+static devclass_t octeon_wdog_devclass;
+
+DRIVER_MODULE(octeon_wdog, ciu, octeon_wdog_driver, octeon_wdog_devclass, 0, 0);