2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * Performance Monitoring Unit
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include "opt_hwpmc_hooks.h"
39 #include "opt_platform.h"
41 #include <sys/param.h>
42 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/module.h>
46 #include <sys/malloc.h>
48 #include <sys/timeet.h>
49 #include <sys/timetc.h>
51 #include <sys/pmckern.h>
54 #include <dev/ofw/openfirm.h>
55 #include <dev/ofw/ofw_bus.h>
56 #include <dev/ofw/ofw_bus_subr.h>
59 #include <machine/bus.h>
60 #include <machine/cpu.h>
61 #include <machine/intr.h>
70 struct resource *res[MAX_RLEN];
75 static struct resource_spec pmu_spec[] = {
76 { SYS_RES_IRQ, 0, RF_ACTIVE },
77 /* We don't currently handle pmu events, other than on cpu 0 */
79 { SYS_RES_IRQ, 1, RF_ACTIVE | RF_OPTIONAL },
80 { SYS_RES_IRQ, 2, RF_ACTIVE | RF_OPTIONAL },
81 { SYS_RES_IRQ, 3, RF_ACTIVE | RF_OPTIONAL },
82 { SYS_RES_IRQ, 4, RF_ACTIVE | RF_OPTIONAL },
83 { SYS_RES_IRQ, 5, RF_ACTIVE | RF_OPTIONAL },
84 { SYS_RES_IRQ, 6, RF_ACTIVE | RF_OPTIONAL },
85 { SYS_RES_IRQ, 7, RF_ACTIVE | RF_OPTIONAL },
93 uint32_t ccnt_hi[MAXCPU];
96 #define PMU_OVSR_C 0x80000000 /* Cycle Counter */
97 #define PMU_IESR_C 0x80000000 /* Cycle Counter */
103 struct trapframe *tf;
106 #if defined(__arm__) && (__ARM_ARCH > 6)
109 cpu = PCPU_GET(cpuid);
111 r = cp15_pmovsr_get();
112 if (r & PMU_OVSR_C) {
113 atomic_add_32(&ccnt_hi[cpu], 1);
114 /* Clear the event. */
116 cp15_pmovsr_set(PMU_OVSR_C);
123 /* Only call into the HWPMC framework if we know there is work. */
124 if (r != 0 && pmc_intr) {
130 return (FILTER_HANDLED);
134 pmu_attach(device_t dev)
136 struct pmu_softc *sc;
137 #if defined(__arm__) && (__ARM_ARCH > 6)
143 sc = device_get_softc(dev);
146 if (bus_alloc_resources(dev, pmu_spec, sc->res)) {
147 device_printf(dev, "could not allocate resources\n");
151 /* Setup interrupt handler */
152 for (i = 0; i < MAX_RLEN; i++) {
153 if (sc->res[i] == NULL)
156 err = bus_setup_intr(dev, sc->res[i], INTR_MPSAFE | INTR_TYPE_MISC,
157 pmu_intr, NULL, NULL, &sc->ih[i]);
159 device_printf(dev, "Unable to setup interrupt handler.\n");
164 #if defined(__arm__) && (__ARM_ARCH > 6)
165 /* Initialize to 0. */
166 for (i = 0; i < MAXCPU; i++)
169 /* Enable the interrupt to fire on overflow. */
170 iesr = cp15_pminten_get();
172 cp15_pminten_set(iesr);
174 /* Need this for getcyclecount() fast path. */
182 static struct ofw_compat_data compat_data[] = {
183 {"arm,armv8-pmuv3", 1},
184 {"arm,cortex-a17-pmu", 1},
185 {"arm,cortex-a15-pmu", 1},
186 {"arm,cortex-a12-pmu", 1},
187 {"arm,cortex-a9-pmu", 1},
188 {"arm,cortex-a8-pmu", 1},
189 {"arm,cortex-a7-pmu", 1},
190 {"arm,cortex-a5-pmu", 1},
191 {"arm,arm11mpcore-pmu", 1},
192 {"arm,arm1176-pmu", 1},
193 {"arm,arm1136-pmu", 1},
194 {"qcom,krait-pmu", 1},
199 pmu_fdt_probe(device_t dev)
202 if (!ofw_bus_status_okay(dev))
205 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
206 device_set_desc(dev, "Performance Monitoring Unit");
207 return (BUS_PROBE_DEFAULT);
213 static device_method_t pmu_fdt_methods[] = {
214 DEVMETHOD(device_probe, pmu_fdt_probe),
215 DEVMETHOD(device_attach, pmu_attach),
219 static driver_t pmu_fdt_driver = {
222 sizeof(struct pmu_softc),
225 static devclass_t pmu_fdt_devclass;
227 DRIVER_MODULE(pmu, simplebus, pmu_fdt_driver, pmu_fdt_devclass, 0, 0);