1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2018 Arm Limited. All rights reserved.
4 *
5 * Author: Suzuki K Poulose <suzuki.poulose@arm.com>
6 */
7
8 #ifndef _CORESIGHT_CATU_H
9 #define _CORESIGHT_CATU_H
10
11 #include "coresight-priv.h"
12
13 /* Register offset from base */
14 #define CATU_CONTROL 0x000
15 #define CATU_MODE 0x004
16 #define CATU_AXICTRL 0x008
17 #define CATU_IRQEN 0x00c
18 #define CATU_SLADDRLO 0x020
19 #define CATU_SLADDRHI 0x024
20 #define CATU_INADDRLO 0x028
21 #define CATU_INADDRHI 0x02c
22 #define CATU_STATUS 0x100
23 #define CATU_DEVARCH 0xfbc
24
25 #define CATU_CONTROL_ENABLE 0
26
27 #define CATU_MODE_PASS_THROUGH 0U
28 #define CATU_MODE_TRANSLATE 1U
29
30 #define CATU_AXICTRL_ARCACHE_SHIFT 4
31 #define CATU_AXICTRL_ARCACHE_MASK 0xf
32 #define CATU_AXICTRL_ARPROT_MASK 0x3
33 #define CATU_AXICTRL_ARCACHE(arcache) \
34 (((arcache) & CATU_AXICTRL_ARCACHE_MASK) << CATU_AXICTRL_ARCACHE_SHIFT)
35
36 #define CATU_AXICTRL_VAL(arcache, arprot) \
37 (CATU_AXICTRL_ARCACHE(arcache) | ((arprot) & CATU_AXICTRL_ARPROT_MASK))
38
39 #define AXI3_AxCACHE_WB_READ_ALLOC 0x7
40 /*
41 * AXI - ARPROT bits:
42 * See AMBA AXI & ACE Protocol specification (ARM IHI 0022E)
43 * sectionA4.7 Access Permissions.
44 *
45 * Bit 0: 0 - Unprivileged access, 1 - Privileged access
46 * Bit 1: 0 - Secure access, 1 - Non-secure access.
47 * Bit 2: 0 - Data access, 1 - instruction access.
48 *
49 * CATU AXICTRL:ARPROT[2] is res0 as we always access data.
50 */
51 #define CATU_OS_ARPROT 0x2
52
53 #define CATU_OS_AXICTRL \
54 CATU_AXICTRL_VAL(AXI3_AxCACHE_WB_READ_ALLOC, CATU_OS_ARPROT)
55
56 #define CATU_STATUS_READY 8
57 #define CATU_STATUS_ADRERR 0
58 #define CATU_STATUS_AXIERR 4
59
60 #define CATU_IRQEN_ON 0x1
61 #define CATU_IRQEN_OFF 0x0
62
63 struct catu_drvdata {
64 void __iomem *base;
65 struct coresight_device *csdev;
66 int irq;
67 };
68
69 #define CATU_REG32(name, offset) \
70 static inline u32 \
71 catu_read_##name(struct catu_drvdata *drvdata) \
72 { \
73 return coresight_read_reg_pair(drvdata->base, offset, -1); \
74 } \
75 static inline void \
76 catu_write_##name(struct catu_drvdata *drvdata, u32 val) \
77 { \
78 coresight_write_reg_pair(drvdata->base, val, offset, -1); \
79 }
80
81 #define CATU_REG_PAIR(name, lo_off, hi_off) \
82 static inline u64 \
83 catu_read_##name(struct catu_drvdata *drvdata) \
84 { \
85 return coresight_read_reg_pair(drvdata->base, lo_off, hi_off); \
86 } \
87 static inline void \
88 catu_write_##name(struct catu_drvdata *drvdata, u64 val) \
89 { \
90 coresight_write_reg_pair(drvdata->base, val, lo_off, hi_off); \
91 }
92
93 CATU_REG32(control, CATU_CONTROL);
94 CATU_REG32(mode, CATU_MODE);
95 CATU_REG32(irqen, CATU_IRQEN);
96 CATU_REG32(axictrl, CATU_AXICTRL);
CATU_REG_PAIR(sladdr,CATU_SLADDRLO,CATU_SLADDRHI)97 CATU_REG_PAIR(sladdr, CATU_SLADDRLO, CATU_SLADDRHI)
98 CATU_REG_PAIR(inaddr, CATU_INADDRLO, CATU_INADDRHI)
99
100 static inline bool coresight_is_catu_device(struct coresight_device *csdev)
101 {
102 if (!IS_ENABLED(CONFIG_CORESIGHT_CATU))
103 return false;
104 if (csdev->type != CORESIGHT_DEV_TYPE_HELPER)
105 return false;
106 if (csdev->subtype.helper_subtype != CORESIGHT_DEV_SUBTYPE_HELPER_CATU)
107 return false;
108 return true;
109 }
110
111 #endif
112
