Author: br
Date: Mon Jan 26 10:31:17 2015
New Revision: 277745
URL: https://svnweb.freebsd.org/changeset/base/277745
Log:
Add a generic way for hooking PMC interrupt.
Added:
head/sys/arm/arm/pmu.c (contents, props changed)
Modified:
head/sys/boot/fdt/dts/arm/am335x.dtsi
Added: head/sys/arm/arm/pmu.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/arm/pmu.c Mon Jan 26 10:31:17 2015 (r277745)
@@ -0,0 +1,157 @@
+/*-
+ * Copyright (c) 2015 Ruslan Bukin <b...@bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * 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.
+ */
+
+/*
+ * Performance Monitoring Unit
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "opt_hwpmc_hooks.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/rman.h>
+#include <sys/timeet.h>
+#include <sys/timetc.h>
+#include <sys/pmc.h>
+#include <sys/pmckern.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+#include <machine/cpu.h>
+#include <machine/intr.h>
+
+struct pmu_softc {
+ struct resource *res[1];
+ device_t dev;
+ void *ih;
+};
+
+static struct ofw_compat_data compat_data[] = {
+ {"arm,cortex-a17-pmu", 1},
+ {"arm,cortex-a15-pmu", 1},
+ {"arm,cortex-a12-pmu", 1},
+ {"arm,cortex-a9-pmu", 1},
+ {"arm,cortex-a8-pmu", 1},
+ {"arm,cortex-a7-pmu", 1},
+ {"arm,cortex-a5-pmu", 1},
+ {"arm,arm11mpcore-pmu", 1},
+ {"arm,arm1176-pmu", 1},
+ {"arm,arm1136-pmu", 1},
+ {"qcom,krait-pmu", 1},
+ {NULL, 0}
+};
+
+static struct resource_spec pmu_spec[] = {
+ { SYS_RES_IRQ, 0, RF_ACTIVE },
+ { -1, 0 }
+};
+
+static int
+pmu_intr(void *arg)
+{
+ struct trapframe *tf;
+
+ tf = arg;
+
+#ifdef HWPMC_HOOKS
+ if (pmc_intr)
+ (*pmc_intr)(PCPU_GET(cpuid), tf);
+#endif
+
+ return (FILTER_HANDLED);
+}
+
+static int
+pmu_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
+ device_set_desc(dev, "Performance Monitoring Unit");
+ return (BUS_PROBE_DEFAULT);
+ }
+
+ return (ENXIO);
+}
+
+static int
+pmu_attach(device_t dev)
+{
+ struct pmu_softc *sc;
+ int err;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ if (bus_alloc_resources(dev, pmu_spec, sc->res)) {
+ device_printf(dev, "could not allocate resources\n");
+ return (ENXIO);
+ }
+
+ /* Setup interrupt handler */
+ err = bus_setup_intr(dev, sc->res[0], INTR_MPSAFE | INTR_TYPE_MISC,
+ pmu_intr, NULL, NULL, &sc->ih);
+ if (err) {
+ device_printf(dev, "Unable to setup interrupt handler.\n");
+ return (ENXIO);
+ }
+
+ return (0);
+}
+
+static device_method_t pmu_methods[] = {
+ DEVMETHOD(device_probe, pmu_probe),
+ DEVMETHOD(device_attach, pmu_attach),
+ { 0, 0 }
+};
+
+static driver_t pmu_driver = {
+ "pmu",
+ pmu_methods,
+ sizeof(struct pmu_softc),
+};
+
+static devclass_t pmu_devclass;
+
+DRIVER_MODULE(pmu, simplebus, pmu_driver, pmu_devclass, 0, 0);
Modified: head/sys/boot/fdt/dts/arm/am335x.dtsi
==============================================================================
--- head/sys/boot/fdt/dts/arm/am335x.dtsi Mon Jan 26 10:25:26 2015
(r277744)
+++ head/sys/boot/fdt/dts/arm/am335x.dtsi Mon Jan 26 10:31:17 2015
(r277745)
@@ -47,6 +47,11 @@
reg = < 0x48200000 0x1000 >;
};
+ pmu {
+ compatible = "arm,cortex-a8-pmu";
+ interrupts = <3>;
+ };
+
scm@44e10000 {
compatible = "ti,scm";
reg = < 0x44e10000 0x2000 >;
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