/* $NetBSD: tprof_armv7.c,v 1.1 2018/07/15 23:50:53 jmcneill Exp $ */

/* $NetBSD: tprof_armv7.c,v 1.1 2018/07/15 23:50:53 jmcneill Exp $ */

/*-
* Copyright (c) 2018 Jared McNeill <[email protected]>
* 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 ``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 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.
*/

#include <sys/cdefs.h>
#include <sys/types.h>

#include <err.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

#include <dev/tprof/tprof_ioctl.h>
#include "../tprof.h"

struct pmu_event {
uint16_t event;
const char *name;
};

struct pmu_event_table {
const char *name;
struct pmu_event *events;
u_int nevents;
struct pmu_event_table *next;
};

/*
* Common event numbers, from ARM ARM.
*/
static struct pmu_event pmu_armv7_common_events[] = {
{ 0x00, "SW_INCR" },
{ 0x01, "L1I_CACHE_REFILL" },
{ 0x02, "L1I_TLB_REFILL" },
{ 0x03, "L1D_CACHE_REFILL" },
{ 0x04, "L1D_CACHE" },
{ 0x05, "L1D_TLB_REFILL" },
{ 0x06, "LD_RETIRED" },
{ 0x07, "ST_RETIRED" },
{ 0x08, "INST_RETIRED" },
{ 0x09, "EXC_TAKEN" },
{ 0x0a, "EXC_RETURN" },
{ 0x0b, "CID_WRITE_RETIRED" },
{ 0x0c, "PC_WRITE_RETIRED" },
{ 0x0d, "BR_IMMED_RETIRED" },
{ 0x0e, "BR_RETURN_RETIRED" },
{ 0x0f, "UNALIGNED_LDST_RETIRED" },
{ 0x10, "BR_MIS_PRED" },
{ 0x11, "CPU_CYCLES" },
{ 0x12, "BR_PRED" },
{ 0x13, "MEM_ACCESS" },
{ 0x14, "L1I_CACHE" },
{ 0x15, "L1D_CACHE_WB" },
{ 0x16, "L2D_CACHE" },
{ 0x17, "L2D_CACHE_REFILL" },
{ 0x18, "L2D_CACHE_WB" },
{ 0x19, "BUS_ACCESS" },
{ 0x1a, "MEMORY_ERROR" },
{ 0x1b, "INST_SPEC" },
{ 0x1c, "TTBR_WRITE_RETIRED" },
{ 0x1d, "BUS_CYCLES" },
};

static struct pmu_event_table pmu_armv7 = {
.name = "ARMv7 common architectural and microarchitectural events",
.events = pmu_armv7_common_events,
.nevents = __arraycount(pmu_armv7_common_events),
.next = NULL
};

static struct pmu_event_table *events = NULL;

int
tprof_event_init(uint32_t ident)
{
if (ident != TPROF_IDENT_ARMV7_GENERIC)
return -1;

events = &pmu_armv7;

return 0;
}

static void
tprof_event_list_table(struct pmu_event_table *tbl)
{
u_int n;

printf("%s:\n", tbl->name);
for (n = 0; n < tbl->nevents; n++) {
printf("\t%s\n", tbl->events[n].name);
}

if (tbl->next)
tprof_event_list_table(tbl->next);
}

void
tprof_event_list(void)
{
tprof_event_list_table(events);
}

static void
tprof_event_lookup_table(const char *name, struct tprof_param *param,
struct pmu_event_table *tbl)
{
u_int n;

for (n = 0; n < tbl->nevents; n++) {
if (strcmp(tbl->events[n].name, name) == 0) {
param->p_event = tbl->events[n].event;
param->p_unit = 0;
return;
}
}

if (tbl->next)
tprof_event_lookup_table(name, param, tbl->next);
else
errx(EXIT_FAILURE, "event '%s' unknown", name);
}

void
tprof_event_lookup(const char *name, struct tprof_param *param)
{
tprof_event_lookup_table(name, param, events);
}