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  1. /***************************************************************************
  2. * Copyright (C) 2008 by Spencer Oliver *
  3. * spen@spen-soft.co.uk *
  4. * *
  5. * Copyright (C) 2008 by David T.L. Wong *
  6. * *
  7. * This program is free software; you can redistribute it and/or modify *
  8. * it under the terms of the GNU General Public License as published by *
  9. * the Free Software Foundation; either version 2 of the License, or *
  10. * (at your option) any later version. *
  11. * *
  12. * This program is distributed in the hope that it will be useful, *
  13. * but WITHOUT ANY WARRANTY; without even the implied warranty of *
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
  15. * GNU General Public License for more details. *
  16. * *
  17. * You should have received a copy of the GNU General Public License *
  18. * along with this program; if not, write to the *
  19. * Free Software Foundation, Inc., *
  20. * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
  21. ***************************************************************************/
  22. #ifndef MIPS_EJTAG
  23. #define MIPS_EJTAG
  24. #include <jtag/jtag.h>
  25. /* tap instructions */
  26. #define EJTAG_INST_IDCODE 0x01
  27. #define EJTAG_INST_IMPCODE 0x03
  28. #define EJTAG_INST_ADDRESS 0x08
  29. #define EJTAG_INST_DATA 0x09
  30. #define EJTAG_INST_CONTROL 0x0A
  31. #define EJTAG_INST_ALL 0x0B
  32. #define EJTAG_INST_EJTAGBOOT 0x0C
  33. #define EJTAG_INST_NORMALBOOT 0x0D
  34. #define EJTAG_INST_FASTDATA 0x0E
  35. #define EJTAG_INST_TCBCONTROLA 0x10
  36. #define EJTAG_INST_TCBCONTROLB 0x11
  37. #define EJTAG_INST_TCBDATA 0x12
  38. #define EJTAG_INST_BYPASS 0xFF
  39. /* ejtag control register bits ECR */
  40. #define EJTAG_CTRL_TOF (1 << 1)
  41. #define EJTAG_CTRL_TIF (1 << 2)
  42. #define EJTAG_CTRL_BRKST (1 << 3)
  43. #define EJTAG_CTRL_DLOCK (1 << 5)
  44. #define EJTAG_CTRL_DRWN (1 << 9)
  45. #define EJTAG_CTRL_DERR (1 << 10)
  46. #define EJTAG_CTRL_DSTRT (1 << 11)
  47. #define EJTAG_CTRL_JTAGBRK (1 << 12)
  48. #define EJTAG_CTRL_SETDEV (1 << 14)
  49. #define EJTAG_CTRL_PROBEN (1 << 15)
  50. #define EJTAG_CTRL_PRRST (1 << 16)
  51. #define EJTAG_CTRL_DMAACC (1 << 17)
  52. #define EJTAG_CTRL_PRACC (1 << 18)
  53. #define EJTAG_CTRL_PRNW (1 << 19)
  54. #define EJTAG_CTRL_PERRST (1 << 20)
  55. #define EJTAG_CTRL_SYNC (1 << 23)
  56. #define EJTAG_CTRL_DNM (1 << 28)
  57. #define EJTAG_CTRL_ROCC (1 << 31)
  58. /* Debug Register (CP0 Register 23, Select 0) */
  59. #define EJTAG_DEBUG_DSS (1 << 0)
  60. #define EJTAG_DEBUG_DBP (1 << 1)
  61. #define EJTAG_DEBUG_DDBL (1 << 2)
  62. #define EJTAG_DEBUG_DDBS (1 << 3)
  63. #define EJTAG_DEBUG_DIB (1 << 4)
  64. #define EJTAG_DEBUG_DINT (1 << 5)
  65. #define EJTAG_DEBUG_OFFLINE (1 << 7)
  66. #define EJTAG_DEBUG_SST (1 << 8)
  67. #define EJTAG_DEBUG_NOSST (1 << 9)
  68. #define EJTAG_DEBUG_DDBLIMPR (1 << 18)
  69. #define EJTAG_DEBUG_DDBSIMPR (1 << 19)
  70. #define EJTAG_DEBUG_IEXI (1 << 20)
  71. #define EJTAG_DEBUG_DBUSEP (1 << 21)
  72. #define EJTAG_DEBUG_CACHEEP (1 << 22)
  73. #define EJTAG_DEBUG_MCHECKP (1 << 23)
  74. #define EJTAG_DEBUG_IBUSEP (1 << 24)
  75. #define EJTAG_DEBUG_COUNTDM (1 << 25)
  76. #define EJTAG_DEBUG_HALT (1 << 26)
  77. #define EJTAG_DEBUG_DOZE (1 << 27)
  78. #define EJTAG_DEBUG_LSNM (1 << 28)
  79. #define EJTAG_DEBUG_NODCR (1 << 29)
  80. #define EJTAG_DEBUG_DM (1 << 30)
  81. #define EJTAG_DEBUG_DBD (1 << 31)
  82. /* implementaion register bits */
  83. #define EJTAG_IMP_R3K (1 << 28)
  84. #define EJTAG_IMP_DINT (1 << 24)
  85. #define EJTAG_IMP_NODMA (1 << 14)
  86. #define EJTAG_IMP_MIPS16 (1 << 16)
  87. #define EJTAG_DCR_MIPS64 (1 << 0)
  88. /* Debug Control Register DCR */
  89. #define EJTAG_DCR 0xFF300000
  90. #define EJTAG_DCR_ENM (1 << 29)
  91. #define EJTAG_DCR_DB (1 << 17)
  92. #define EJTAG_DCR_IB (1 << 16)
  93. #define EJTAG_DCR_INTE (1 << 4)
  94. /* breakpoint support */
  95. #define EJTAG_IBS 0xFF301000
  96. #define EJTAG_IBA1 0xFF301100
  97. #define EJTAG_DBS 0xFF302000
  98. #define EJTAG_DBA1 0xFF302100
  99. #define EJTAG_DBCn_NOSB (1 << 13)
  100. #define EJTAG_DBCn_NOLB (1 << 12)
  101. #define EJTAG_DBCn_BLM_MASK 0xff
  102. #define EJTAG_DBCn_BLM_SHIFT 4
  103. #define EJTAG_DBCn_BE (1 << 0)
  104. struct mips_ejtag
  105. {
  106. struct jtag_tap *tap;
  107. uint32_t impcode;
  108. uint32_t idcode;
  109. uint32_t ejtag_ctrl;
  110. };
  111. int mips_ejtag_set_instr(struct mips_ejtag *ejtag_info,
  112. int new_instr, void *delete_me_and_submit_patch);
  113. int mips_ejtag_enter_debug(struct mips_ejtag *ejtag_info);
  114. int mips_ejtag_exit_debug(struct mips_ejtag *ejtag_info);
  115. int mips_ejtag_get_impcode(struct mips_ejtag *ejtag_info, uint32_t *impcode);
  116. int mips_ejtag_get_idcode(struct mips_ejtag *ejtag_info, uint32_t *idcode);
  117. int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data);
  118. int mips_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, int write, uint32_t *data);
  119. int mips_ejtag_init(struct mips_ejtag *ejtag_info);
  120. int mips_ejtag_config_step(struct mips_ejtag *ejtag_info, int enable_step);
  121. int mips_ejtag_read_debug(struct mips_ejtag *ejtag_info, uint32_t* debug_reg);
  122. #endif /* MIPS_EJTAG */