tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Arm Statistical Profiling Extensions (SPE) support
4 * Copyright (c) 2017-2018, Arm Ltd.
5 */
6
7#ifndef INCLUDE__ARM_SPE_PKT_DECODER_H__
8#define INCLUDE__ARM_SPE_PKT_DECODER_H__
9
10#include <stddef.h>
11#include <stdint.h>
12
13#define ARM_SPE_PKT_DESC_MAX 256
14
15#define ARM_SPE_NEED_MORE_BYTES -1
16#define ARM_SPE_BAD_PACKET -2
17
18#define ARM_SPE_PKT_MAX_SZ 16
19
20enum arm_spe_pkt_type {
21 ARM_SPE_BAD,
22 ARM_SPE_PAD,
23 ARM_SPE_END,
24 ARM_SPE_TIMESTAMP,
25 ARM_SPE_ADDRESS,
26 ARM_SPE_COUNTER,
27 ARM_SPE_CONTEXT,
28 ARM_SPE_OP_TYPE,
29 ARM_SPE_EVENTS,
30 ARM_SPE_DATA_SOURCE,
31};
32
33struct arm_spe_pkt {
34 enum arm_spe_pkt_type type;
35 unsigned char index;
36 uint64_t payload;
37};
38
39#define SPE_ADDR_PKT_HDR_INDEX_INS (0x0)
40#define SPE_ADDR_PKT_HDR_INDEX_BRANCH (0x1)
41#define SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT (0x2)
42#define SPE_ADDR_PKT_HDR_INDEX_DATA_PHYS (0x3)
43
44#define SPE_ADDR_PKT_NS BIT(7)
45#define SPE_ADDR_PKT_CH BIT(6)
46#define SPE_ADDR_PKT_EL_OFFSET (5)
47#define SPE_ADDR_PKT_EL_MASK (0x3 << SPE_ADDR_PKT_EL_OFFSET)
48#define SPE_ADDR_PKT_EL0 (0)
49#define SPE_ADDR_PKT_EL1 (1)
50#define SPE_ADDR_PKT_EL2 (2)
51#define SPE_ADDR_PKT_EL3 (3)
52
53const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
54
55int arm_spe_get_packet(const unsigned char *buf, size_t len,
56 struct arm_spe_pkt *packet);
57
58int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf, size_t len);
59#endif