1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright(C) 2020 Linaro Limited. All rights reserved.
  4 * Author: Mike Leach <mike.leach@linaro.org>
  5 */
  6
  7#include "coresight-config.h"
  8
  9/* ETMv4 includes and features */
 10#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X)
 11#include "coresight-etm4x-cfg.h"
 12
 13/* preload configurations and features */
 14
 15/* preload in features for ETMv4 */
 16
 17/* strobe feature */
 18static struct cscfg_parameter_desc strobe_params[] = {
 19	{
 20		.name = "window",
 21		.value = 5000,
 22	},
 23	{
 24		.name = "period",
 25		.value = 10000,
 26	},
 27};
 28
 29static struct cscfg_regval_desc strobe_regs[] = {
 30	/* resource selectors */
 31	{
 32		.type = CS_CFG_REG_TYPE_RESOURCE,
 33		.offset = TRCRSCTLRn(2),
 34		.hw_info = ETM4_CFG_RES_SEL,
 35		.val32 = 0x20001,
 36	},
 37	{
 38		.type = CS_CFG_REG_TYPE_RESOURCE,
 39		.offset = TRCRSCTLRn(3),
 40		.hw_info = ETM4_CFG_RES_SEQ,
 41		.val32 = 0x20002,
 42	},
 43	/* strobe window counter 0 - reload from param 0 */
 44	{
 45		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_SAVE,
 46		.offset = TRCCNTVRn(0),
 47		.hw_info = ETM4_CFG_RES_CTR,
 48	},
 49	{
 50		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_PARAM,
 51		.offset = TRCCNTRLDVRn(0),
 52		.hw_info = ETM4_CFG_RES_CTR,
 53		.val32 = 0,
 54	},
 55	{
 56		.type = CS_CFG_REG_TYPE_RESOURCE,
 57		.offset = TRCCNTCTLRn(0),
 58		.hw_info = ETM4_CFG_RES_CTR,
 59		.val32 = 0x10001,
 60	},
 61	/* strobe period counter 1 - reload from param 1 */
 62	{
 63		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_SAVE,
 64		.offset = TRCCNTVRn(1),
 65		.hw_info = ETM4_CFG_RES_CTR,
 66	},
 67	{
 68		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_PARAM,
 69		.offset = TRCCNTRLDVRn(1),
 70		.hw_info = ETM4_CFG_RES_CTR,
 71		.val32 = 1,
 72	},
 73	{
 74		.type = CS_CFG_REG_TYPE_RESOURCE,
 75		.offset = TRCCNTCTLRn(1),
 76		.hw_info = ETM4_CFG_RES_CTR,
 77		.val32 = 0x8102,
 78	},
 79	/* sequencer */
 80	{
 81		.type = CS_CFG_REG_TYPE_RESOURCE,
 82		.offset = TRCSEQEVRn(0),
 83		.hw_info = ETM4_CFG_RES_SEQ,
 84		.val32 = 0x0081,
 85	},
 86	{
 87		.type = CS_CFG_REG_TYPE_RESOURCE,
 88		.offset = TRCSEQEVRn(1),
 89		.hw_info = ETM4_CFG_RES_SEQ,
 90		.val32 = 0x0000,
 91	},
 92	/* view-inst */
 93	{
 94		.type = CS_CFG_REG_TYPE_STD | CS_CFG_REG_TYPE_VAL_MASK,
 95		.offset = TRCVICTLR,
 96		.val32 = 0x0003,
 97		.mask32 = 0x0003,
 98	},
 99	/* end of regs */
100};
101
102struct cscfg_feature_desc strobe_etm4x = {
103	.name = "strobing",
104	.description = "Generate periodic trace capture windows.\n"
105		       "parameter \'window\': a number of CPU cycles (W)\n"
106		       "parameter \'period\': trace enabled for W cycles every period x W cycles\n",
107	.match_flags = CS_CFG_MATCH_CLASS_SRC_ETM4,
108	.nr_params = ARRAY_SIZE(strobe_params),
109	.params_desc = strobe_params,
110	.nr_regs = ARRAY_SIZE(strobe_regs),
111	.regs_desc = strobe_regs,
112};
113
114/* create an autofdo configuration */
115
116/* we will provide 9 sets of preset parameter values */
117#define AFDO_NR_PRESETS	9
118/* the total number of parameters in used features */
119#define AFDO_NR_PARAMS	ARRAY_SIZE(strobe_params)
120
121static const char *afdo_ref_names[] = {
122	"strobing",
123};
124
125/*
126 * set of presets leaves strobing window constant while varying period to allow
127 * experimentation with mark / space ratios for various workloads
128 */
129static u64 afdo_presets[AFDO_NR_PRESETS][AFDO_NR_PARAMS] = {
130	{ 5000, 2 },
131	{ 5000, 4 },
132	{ 5000, 8 },
133	{ 5000, 16 },
134	{ 5000, 64 },
135	{ 5000, 128 },
136	{ 5000, 512 },
137	{ 5000, 1024 },
138	{ 5000, 4096 },
139};
140
141struct cscfg_config_desc afdo_etm4x = {
142	.name = "autofdo",
143	.description = "Setup ETMs with strobing for autofdo\n"
144	"Supplied presets allow experimentation with mark-space ratio for various loads\n",
145	.nr_feat_refs = ARRAY_SIZE(afdo_ref_names),
146	.feat_ref_names = afdo_ref_names,
147	.nr_presets = AFDO_NR_PRESETS,
148	.nr_total_params = AFDO_NR_PARAMS,
149	.presets = &afdo_presets[0][0],
150};
151
152/* end of ETM4x configurations */
153#endif	/* IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) */