drivers/hwtracing/coresight/coresight-catu.h

   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);
  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