Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright(C) 2015 Linaro Limited. All rights reserved.
4 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
5 */
6
7#ifndef _LINUX_CORESIGHT_PMU_H
8#define _LINUX_CORESIGHT_PMU_H
9
10#define CORESIGHT_ETM_PMU_NAME "cs_etm"
11#define CORESIGHT_ETM_PMU_SEED 0x10
12
13/*
14 * Below are the definition of bit offsets for perf option, and works as
15 * arbitrary values for all ETM versions.
16 *
17 * Most of them are orignally from ETMv3.5/PTM's ETMCR config, therefore,
18 * ETMv3.5/PTM doesn't define ETMCR config bits with prefix "ETM3_" and
19 * directly use below macros as config bits.
20 */
21#define ETM_OPT_BRANCH_BROADCAST 8
22#define ETM_OPT_CYCACC 12
23#define ETM_OPT_CTXTID 14
24#define ETM_OPT_CTXTID2 15
25#define ETM_OPT_TS 28
26#define ETM_OPT_RETSTK 29
27
28/* ETMv4 CONFIGR programming bits for the ETM OPTs */
29#define ETM4_CFG_BIT_BB 3
30#define ETM4_CFG_BIT_CYCACC 4
31#define ETM4_CFG_BIT_CTXTID 6
32#define ETM4_CFG_BIT_VMID 7
33#define ETM4_CFG_BIT_TS 11
34#define ETM4_CFG_BIT_RETSTK 12
35#define ETM4_CFG_BIT_VMID_OPT 15
36
37static inline int coresight_get_trace_id(int cpu)
38{
39 /*
40 * A trace ID of value 0 is invalid, so let's start at some
41 * random value that fits in 7 bits and go from there. Since
42 * the common convention is to have data trace IDs be I(N) + 1,
43 * set instruction trace IDs as a function of the CPU number.
44 */
45 return (CORESIGHT_ETM_PMU_SEED + (cpu * 2));
46}
47
48#endif