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   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2018 by Square, Inc.                                    *
   5  *   Steven Stallion <stallion@squareup.com>                               *
   6  *   James Zhao <hjz@squareup.com>                                         *
   7  ***************************************************************************/
   8
   9 #ifndef OPENOCD_TARGET_ESIRISC_JTAG_H
  10 #define OPENOCD_TARGET_ESIRISC_JTAG_H
  11
  12 #include <helper/types.h>
  13 #include <jtag/jtag.h>
  14
  15 /* TAP Instructions */
  16 #define INSTR_IDCODE                    0x8
  17 #define INSTR_DEBUG                             0x9
  18 #define INSTR_BYPASS                    0xf
  19 #define INSTR_LENGTH                    4
  20
  21 /* eSi-Debug Commands */
  22 #define DEBUG_NOP                               0x00
  23 #define DEBUG_READ_BYTE                 0x10
  24 #define DEBUG_READ_HWORD                0x20
  25 #define DEBUG_READ_WORD                 0x30
  26 #define DEBUG_WRITE_BYTE                0x60
  27 #define DEBUG_WRITE_HWORD               0x70
  28 #define DEBUG_WRITE_WORD                0x80
  29 #define DEBUG_READ_REG                  0xb0
  30 #define DEBUG_WRITE_REG                 0xc0
  31 #define DEBUG_READ_CSR                  0xd0
  32 #define DEBUG_WRITE_CSR                 0xe0
  33 #define DEBUG_ENABLE_DEBUG              0xf0
  34 #define DEBUG_DISABLE_DEBUG             0xf2
  35 #define DEBUG_ASSERT_RESET              0xf4
  36 #define DEBUG_DEASSERT_RESET    0xf6
  37 #define DEBUG_BREAK                             0xf8
  38 #define DEBUG_CONTINUE                  0xfa
  39 #define DEBUG_FLUSH_CACHES              0xfc
  40
  41 /* Exception IDs */
  42 #define EID_OVERFLOW                    0x3d
  43 #define EID_CANT_DEBUG                  0x3e
  44 #define EID_NONE                                0x3f
  45
  46 /* Byte Stuffing */
  47 #define STUFF_MARKER                    0x55
  48 #define PAD_BYTE                                0xaa
  49
  50 struct esirisc_jtag {
  51         struct jtag_tap *tap;
  52         uint8_t status;
  53 };
  54
  55 bool esirisc_jtag_is_debug_active(struct esirisc_jtag *jtag_info);
  56 bool esirisc_jtag_is_stopped(struct esirisc_jtag *jtag_info);
  57 uint8_t esirisc_jtag_get_eid(struct esirisc_jtag *jtag_info);
  58
  59 int esirisc_jtag_read_byte(struct esirisc_jtag *jtag_info,
  60                 uint32_t address, uint8_t *data);
  61 int esirisc_jtag_read_hword(struct esirisc_jtag *jtag_info,
  62                 uint32_t address, uint16_t *data);
  63 int esirisc_jtag_read_word(struct esirisc_jtag *jtag_info,
  64                 uint32_t address, uint32_t *data);
  65
  66 int esirisc_jtag_write_byte(struct esirisc_jtag *jtag_info,
  67                 uint32_t address, uint8_t data);
  68 int esirisc_jtag_write_hword(struct esirisc_jtag *jtag_info,
  69                 uint32_t address, uint16_t data);
  70 int esirisc_jtag_write_word(struct esirisc_jtag *jtag_info,
  71                 uint32_t address, uint32_t data);
  72
  73 int esirisc_jtag_read_reg(struct esirisc_jtag *jtag_info,
  74                 uint8_t reg, uint32_t *data);
  75 int esirisc_jtag_write_reg(struct esirisc_jtag *jtag_info,
  76                 uint8_t reg, uint32_t data);
  77
  78 int esirisc_jtag_read_csr(struct esirisc_jtag *jtag_info,
  79                 uint8_t bank, uint8_t csr, uint32_t *data);
  80 int esirisc_jtag_write_csr(struct esirisc_jtag *jtag_info,
  81                 uint8_t bank, uint8_t csr, uint32_t data);
  82
  83 int esirisc_jtag_enable_debug(struct esirisc_jtag *jtag_info);
  84 int esirisc_jtag_disable_debug(struct esirisc_jtag *jtag_info);
  85
  86 int esirisc_jtag_assert_reset(struct esirisc_jtag *jtag_info);
  87 int esirisc_jtag_deassert_reset(struct esirisc_jtag *jtag_info);
  88
  89 int esirisc_jtag_break(struct esirisc_jtag *jtag_info);
  90 int esirisc_jtag_continue(struct esirisc_jtag *jtag_info);
  91
  92 int esirisc_jtag_flush_caches(struct esirisc_jtag *jtag_info);
  93
  94 #endif /* OPENOCD_TARGET_ESIRISC_JTAG_H */