5e78bbb74a
This will allow us to add an ACPI attachment. Submitted by: Greg V <greg@unrelenting.technology> (earlier version) Sponsored by: Innovate UK
162 lines
4.0 KiB
C
162 lines
4.0 KiB
C
/*-
|
|
* Copyright (c) 2015 Ruslan Bukin <br@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 <machine/bus.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include "pmu.h"
|
|
|
|
/* CCNT */
|
|
#if defined(__arm__) && (__ARM_ARCH > 6)
|
|
int pmu_attched = 0;
|
|
uint32_t ccnt_hi[MAXCPU];
|
|
#endif
|
|
|
|
#define PMU_OVSR_C 0x80000000 /* Cycle Counter */
|
|
#define PMU_IESR_C 0x80000000 /* Cycle Counter */
|
|
|
|
static int
|
|
pmu_intr(void *arg)
|
|
{
|
|
#ifdef HWPMC_HOOKS
|
|
struct trapframe *tf;
|
|
#endif
|
|
uint32_t r;
|
|
#if defined(__arm__) && (__ARM_ARCH > 6)
|
|
u_int cpu;
|
|
|
|
cpu = PCPU_GET(cpuid);
|
|
|
|
r = cp15_pmovsr_get();
|
|
if (r & PMU_OVSR_C) {
|
|
atomic_add_32(&ccnt_hi[cpu], 1);
|
|
/* Clear the event. */
|
|
r &= ~PMU_OVSR_C;
|
|
cp15_pmovsr_set(PMU_OVSR_C);
|
|
}
|
|
#else
|
|
r = 1;
|
|
#endif
|
|
|
|
#ifdef HWPMC_HOOKS
|
|
/* Only call into the HWPMC framework if we know there is work. */
|
|
if (r != 0 && pmc_intr) {
|
|
tf = arg;
|
|
(*pmc_intr)(tf);
|
|
}
|
|
#endif
|
|
|
|
return (FILTER_HANDLED);
|
|
}
|
|
|
|
int
|
|
pmu_attach(device_t dev)
|
|
{
|
|
struct pmu_softc *sc;
|
|
#if defined(__arm__) && (__ARM_ARCH > 6)
|
|
uint32_t iesr;
|
|
#endif
|
|
int err, i;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->dev = dev;
|
|
|
|
for (i = 0; i < MAX_RLEN; i++) {
|
|
if (sc->irq[i].res == NULL)
|
|
break;
|
|
err = bus_setup_intr(dev, sc->irq[i].res,
|
|
INTR_MPSAFE | INTR_TYPE_MISC, pmu_intr, NULL, NULL,
|
|
&sc->irq[i].ih);
|
|
if (err != 0) {
|
|
device_printf(dev,
|
|
"Unable to setup interrupt handler.\n");
|
|
goto fail;
|
|
}
|
|
if (sc->irq[i].cpuid != -1) {
|
|
err = bus_bind_intr(dev, sc->irq[i].res,
|
|
sc->irq[i].cpuid);
|
|
if (err != 0) {
|
|
device_printf(sc->dev,
|
|
"Unable to bind interrupt.\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if defined(__arm__) && (__ARM_ARCH > 6)
|
|
/* Initialize to 0. */
|
|
for (i = 0; i < MAXCPU; i++)
|
|
ccnt_hi[i] = 0;
|
|
|
|
/* Enable the interrupt to fire on overflow. */
|
|
iesr = cp15_pminten_get();
|
|
iesr |= PMU_IESR_C;
|
|
cp15_pminten_set(iesr);
|
|
|
|
/* Need this for getcyclecount() fast path. */
|
|
pmu_attched |= 1;
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
for (i = 1; i < MAX_RLEN; i++) {
|
|
if (sc->irq[i].ih != NULL)
|
|
bus_teardown_intr(dev, sc->irq[i].res, sc->irq[i].ih);
|
|
if (sc->irq[i].res != NULL)
|
|
bus_release_resource(dev, SYS_RES_IRQ, i,
|
|
sc->irq[i].res);
|
|
}
|
|
return(err);
|
|
}
|
|
|