freebsd-dev/sys/mips/cavium/octeon_pmc.c
2012-03-24 06:28:15 +00:00

131 lines
3.6 KiB
C

/*-
* Copyright (c) 2012 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, 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <sys/smp.h>
#include <sys/pmc.h>
#include <sys/pmckern.h>
#include <machine/bus.h>
#include <machine/intr_machdep.h>
#include <contrib/octeon-sdk/cvmx.h>
#include <mips/cavium/octeon_irq.h>
struct octeon_pmc_softc {
struct rman irq_rman;
struct resource *octeon_pmc_irq;
};
static void octeon_pmc_identify(driver_t *, device_t);
static int octeon_pmc_probe(device_t);
static int octeon_pmc_attach(device_t);
static int octeon_pmc_intr(void *);
static void
octeon_pmc_identify(driver_t *drv, device_t parent)
{
if (octeon_has_feature(OCTEON_FEATURE_USB))
BUS_ADD_CHILD(parent, 0, "pmc", 0);
}
static int
octeon_pmc_probe(device_t dev)
{
if (device_get_unit(dev) != 0)
return (ENXIO);
device_set_desc(dev, "Cavium Octeon Performance Counters");
return (0);
}
static int
octeon_pmc_attach(device_t dev)
{
struct octeon_pmc_softc *sc;
int error;
int rid;
sc = device_get_softc(dev);
rid = 0;
sc->octeon_pmc_irq = bus_alloc_resource(dev,
SYS_RES_IRQ, &rid, OCTEON_PMC_IRQ,
OCTEON_PMC_IRQ, 1, RF_ACTIVE);
if (sc->octeon_pmc_irq == NULL) {
device_printf(dev, "could not allocate irq%d\n", OCTEON_PMC_IRQ);
return (ENXIO);
}
error = bus_setup_intr(dev, sc->octeon_pmc_irq,
INTR_TYPE_MISC, octeon_pmc_intr, NULL, sc, NULL);
if (error != 0) {
device_printf(dev, "bus_setup_intr failed: %d\n", error);
return (error);
}
return (0);
}
static int
octeon_pmc_intr(void *arg)
{
struct trapframe *tf = PCPU_GET(curthread)->td_intr_frame;
if (pmc_intr)
(*pmc_intr)(PCPU_GET(cpuid), tf);
return (FILTER_HANDLED);
}
static device_method_t octeon_pmc_methods[] = {
DEVMETHOD(device_identify, octeon_pmc_identify),
DEVMETHOD(device_probe, octeon_pmc_probe),
DEVMETHOD(device_attach, octeon_pmc_attach),
{ 0, 0 }
};
static driver_t octeon_pmc_driver = {
"pmc",
octeon_pmc_methods,
sizeof(struct octeon_pmc_softc),
};
static devclass_t octeon_pmc_devclass;
DRIVER_MODULE(octeon_pmc, nexus, octeon_pmc_driver, octeon_pmc_devclass, 0, 0);