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/*
* Performance counter support for e6500 family processors.
*
* Author: Priyanka Jain, Priyanka.Jain@freescale.com
* Based on e500-pmu.c
* Copyright 2013 Freescale Semiconductor, Inc.
* Copyright 2008-2009 Paul Mackerras, IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/string.h>
#include <linux/perf_event.h>
#include <asm/reg.h>
#include <asm/cputable.h>
/*
* Map of generic hardware event types to hardware events
* Zero if unsupported
*/
static int e6500_generic_events[] = {
[PERF_COUNT_HW_CPU_CYCLES] = 1,
[PERF_COUNT_HW_INSTRUCTIONS] = 2,
[PERF_COUNT_HW_CACHE_MISSES] = 221,
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 12,
[PERF_COUNT_HW_BRANCH_MISSES] = 15,
};
#define C(x) PERF_COUNT_HW_CACHE_##x
/*
* Table of generalized cache-related events.
* 0 means not supported, -1 means nonsensical, other values
* are event codes.
*/
static int e6500_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
[C(L1D)] = {
/*RESULT_ACCESS RESULT_MISS */
[C(OP_READ)] = { 27, 222 },
[C(OP_WRITE)] = { 28, 223 },
[C(OP_PREFETCH)] = { 29, 0 },
},
[C(L1I)] = {
/*RESULT_ACCESS RESULT_MISS */
[C(OP_READ)] = { 2, 254 },
[C(OP_WRITE)] = { -1, -1 },
[C(OP_PREFETCH)] = { 37, 0 },
},
/*
* Assuming LL means L2, it's not a good match for this model.
* It does not have separate read/write events (but it does have
* separate instruction/data events).
*/
[C(LL)] = {
/*RESULT_ACCESS RESULT_MISS */
[C(OP_READ)] = { 0, 0 },
[C(OP_WRITE)] = { 0, 0 },
[C(OP_PREFETCH)] = { 0, 0 },
},
/*
* There are data/instruction MMU misses, but that's a miss on
* the chip's internal level-one TLB which is probably not
* what the user wants. Instead, unified level-two TLB misses
* are reported here.
*/
[C(DTLB)] = {
/*RESULT_ACCESS RESULT_MISS */
[C(OP_READ)] = { 26, 66 },
[C(OP_WRITE)] = { -1, -1 },
[C(OP_PREFETCH)] = { -1, -1 },
},
[C(BPU)] = {
/*RESULT_ACCESS RESULT_MISS */
[C(OP_READ)] = { 12, 15 },
[C(OP_WRITE)] = { -1, -1 },
[C(OP_PREFETCH)] = { -1, -1 },
},
[C(NODE)] = {
/* RESULT_ACCESS RESULT_MISS */
[C(OP_READ)] = { -1, -1 },
[C(OP_WRITE)] = { -1, -1 },
[C(OP_PREFETCH)] = { -1, -1 },
},
};
static int num_events = 512;
/* Upper half of event id is PMLCb, for threshold events */
static u64 e6500_xlate_event(u64 event_id)
{
u32 event_low = (u32)event_id;
if (event_low >= num_events ||
(event_id & (FSL_EMB_EVENT_THRESHMUL | FSL_EMB_EVENT_THRESH)))
return 0;
return FSL_EMB_EVENT_VALID;
}
static struct fsl_emb_pmu e6500_pmu = {
.name = "e6500 family",
.n_counter = 6,
.n_restricted = 0,
.xlate_event = e6500_xlate_event,
.n_generic = ARRAY_SIZE(e6500_generic_events),
.generic_events = e6500_generic_events,
.cache_events = &e6500_cache_events,
};
static int init_e6500_pmu(void)
{
if (!cur_cpu_spec->oprofile_cpu_type ||
strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc/e6500"))
return -ENODEV;
return register_fsl_emb_pmu(&e6500_pmu);
}
early_initcall(init_e6500_pmu);
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