Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/*
2 * SPDX-License-Identifier: GPL-2.0
3 *
4 * Copyright(C) 2015-2018 Linaro Limited.
5 *
6 * Author: Tor Jeremiassen <tor@ti.com>
7 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
8 */
9
10#ifndef INCLUDE__CS_ETM_DECODER_H__
11#define INCLUDE__CS_ETM_DECODER_H__
12
13#include <linux/types.h>
14#include <stdio.h>
15
16struct cs_etm_decoder;
17
18struct cs_etm_buffer {
19 const unsigned char *buf;
20 size_t len;
21 u64 offset;
22 u64 ref_timestamp;
23};
24
25enum cs_etm_sample_type {
26 CS_ETM_EMPTY,
27 CS_ETM_RANGE,
28 CS_ETM_DISCONTINUITY,
29 CS_ETM_EXCEPTION,
30 CS_ETM_EXCEPTION_RET,
31};
32
33enum cs_etm_isa {
34 CS_ETM_ISA_UNKNOWN,
35 CS_ETM_ISA_A64,
36 CS_ETM_ISA_A32,
37 CS_ETM_ISA_T32,
38};
39
40struct cs_etm_packet {
41 enum cs_etm_sample_type sample_type;
42 enum cs_etm_isa isa;
43 u64 start_addr;
44 u64 end_addr;
45 u32 instr_count;
46 u8 last_instr_taken_branch;
47 u8 last_instr_size;
48 int cpu;
49};
50
51struct cs_etm_queue;
52
53typedef u32 (*cs_etm_mem_cb_type)(struct cs_etm_queue *, u64,
54 size_t, u8 *);
55
56struct cs_etmv3_trace_params {
57 u32 reg_ctrl;
58 u32 reg_trc_id;
59 u32 reg_ccer;
60 u32 reg_idr;
61};
62
63struct cs_etmv4_trace_params {
64 u32 reg_idr0;
65 u32 reg_idr1;
66 u32 reg_idr2;
67 u32 reg_idr8;
68 u32 reg_configr;
69 u32 reg_traceidr;
70};
71
72struct cs_etm_trace_params {
73 int protocol;
74 union {
75 struct cs_etmv3_trace_params etmv3;
76 struct cs_etmv4_trace_params etmv4;
77 };
78};
79
80struct cs_etm_decoder_params {
81 int operation;
82 void (*packet_printer)(const char *msg);
83 cs_etm_mem_cb_type mem_acc_cb;
84 u8 formatted;
85 u8 fsyncs;
86 u8 hsyncs;
87 u8 frame_aligned;
88 void *data;
89};
90
91/*
92 * The following enums are indexed starting with 1 to align with the
93 * open source coresight trace decoder library.
94 */
95enum {
96 CS_ETM_PROTO_ETMV3 = 1,
97 CS_ETM_PROTO_ETMV4i,
98 CS_ETM_PROTO_ETMV4d,
99 CS_ETM_PROTO_PTM,
100};
101
102enum {
103 CS_ETM_OPERATION_PRINT = 1,
104 CS_ETM_OPERATION_DECODE,
105};
106
107int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
108 u64 indx, const u8 *buf,
109 size_t len, size_t *consumed);
110
111struct cs_etm_decoder *
112cs_etm_decoder__new(int num_cpu,
113 struct cs_etm_decoder_params *d_params,
114 struct cs_etm_trace_params t_params[]);
115
116void cs_etm_decoder__free(struct cs_etm_decoder *decoder);
117
118int cs_etm_decoder__add_mem_access_cb(struct cs_etm_decoder *decoder,
119 u64 start, u64 end,
120 cs_etm_mem_cb_type cb_func);
121
122int cs_etm_decoder__get_packet(struct cs_etm_decoder *decoder,
123 struct cs_etm_packet *packet);
124
125int cs_etm_decoder__reset(struct cs_etm_decoder *decoder);
126
127#endif /* INCLUDE__CS_ETM_DECODER_H__ */