src/target/mips_ejtag.h

   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
  23 #ifndef MIPS_EJTAG
  24 #define MIPS_EJTAG
  25
  26 #include <jtag/jtag.h>
  27
  28 /* tap instructions */
  29 #define EJTAG_INST_IDCODE               0x01
  30 #define EJTAG_INST_IMPCODE              0x03
  31 #define EJTAG_INST_ADDRESS              0x08
  32 #define EJTAG_INST_DATA                 0x09
  33 #define EJTAG_INST_CONTROL              0x0A
  34 #define EJTAG_INST_ALL                  0x0B
  35 #define EJTAG_INST_EJTAGBOOT    0x0C
  36 #define EJTAG_INST_NORMALBOOT   0x0D
  37 #define EJTAG_INST_FASTDATA             0x0E
  38 #define EJTAG_INST_TCBCONTROLA  0x10
  39 #define EJTAG_INST_TCBCONTROLB  0x11
  40 #define EJTAG_INST_TCBDATA              0x12
  41 #define EJTAG_INST_BYPASS               0xFF
  42
  43 /* microchip PIC32MX specific instructions */
  44 #define MTAP_SW_MTAP                    0x04
  45 #define MTAP_SW_ETAP                    0x05
  46 #define MTAP_COMMAND                    0x07
  47
  48 /* microchip specific cmds */
  49 #define MCHP_ASERT_RST                  0xd1
  50 #define MCHP_DE_ASSERT_RST              0xd0
  51 #define MCHP_ERASE                              0xfc
  52 #define MCHP_STATUS                             0x00
  53
  54 /* ejtag control register bits ECR */
  55 #define EJTAG_CTRL_TOF                  (1 << 1)
  56 #define EJTAG_CTRL_TIF                  (1 << 2)
  57 #define EJTAG_CTRL_BRKST                (1 << 3)
  58 #define EJTAG_CTRL_DLOCK                (1 << 5)
  59 #define EJTAG_CTRL_DRWN                 (1 << 9)
  60 #define EJTAG_CTRL_DERR                 (1 << 10)
  61 #define EJTAG_CTRL_DSTRT                (1 << 11)
  62 #define EJTAG_CTRL_JTAGBRK              (1 << 12)
  63 #define EJTAG_CTRL_SETDEV               (1 << 14)
  64 #define EJTAG_CTRL_PROBEN               (1 << 15)
  65 #define EJTAG_CTRL_PRRST                (1 << 16)
  66 #define EJTAG_CTRL_DMAACC               (1 << 17)
  67 #define EJTAG_CTRL_PRACC                (1 << 18)
  68 #define EJTAG_CTRL_PRNW                 (1 << 19)
  69 #define EJTAG_CTRL_PERRST               (1 << 20)
  70 #define EJTAG_CTRL_SYNC                 (1 << 23)
  71 #define EJTAG_CTRL_DNM                  (1 << 28)
  72 #define EJTAG_CTRL_ROCC                 (1 << 31)
  73
  74 /* Debug Register (CP0 Register 23, Select 0) */
  75
  76 #define EJTAG_DEBUG_DSS                 (1 << 0)
  77 #define EJTAG_DEBUG_DBP                 (1 << 1)
  78 #define EJTAG_DEBUG_DDBL                (1 << 2)
  79 #define EJTAG_DEBUG_DDBS                (1 << 3)
  80 #define EJTAG_DEBUG_DIB                 (1 << 4)
  81 #define EJTAG_DEBUG_DINT                (1 << 5)
  82 #define EJTAG_DEBUG_OFFLINE             (1 << 7)
  83 #define EJTAG_DEBUG_SST                 (1 << 8)
  84 #define EJTAG_DEBUG_NOSST               (1 << 9)
  85 #define EJTAG_DEBUG_DDBLIMPR    (1 << 18)
  86 #define EJTAG_DEBUG_DDBSIMPR    (1 << 19)
  87 #define EJTAG_DEBUG_IEXI                (1 << 20)
  88 #define EJTAG_DEBUG_DBUSEP              (1 << 21)
  89 #define EJTAG_DEBUG_CACHEEP             (1 << 22)
  90 #define EJTAG_DEBUG_MCHECKP             (1 << 23)
  91 #define EJTAG_DEBUG_IBUSEP              (1 << 24)
  92 #define EJTAG_DEBUG_COUNTDM             (1 << 25)
  93 #define EJTAG_DEBUG_HALT                (1 << 26)
  94 #define EJTAG_DEBUG_DOZE                (1 << 27)
  95 #define EJTAG_DEBUG_LSNM                (1 << 28)
  96 #define EJTAG_DEBUG_NODCR               (1 << 29)
  97 #define EJTAG_DEBUG_DM                  (1 << 30)
  98 #define EJTAG_DEBUG_DBD                 (1 << 31)
  99
 100 /* implementaion register bits */
 101 #define EJTAG_IMP_R3K                   (1 << 28)
 102 #define EJTAG_IMP_DINT                  (1 << 24)
 103 #define EJTAG_IMP_NODMA                 (1 << 14)
 104 #define EJTAG_IMP_MIPS16                (1 << 16)
 105 #define EJTAG_DCR_MIPS64                (1 << 0)
 106
 107 /* Debug Control Register DCR */
 108 #define EJTAG_DCR                               0xFF300000
 109 #define EJTAG_DCR_ENM                   (1 << 29)
 110 #define EJTAG_DCR_DB                    (1 << 17)
 111 #define EJTAG_DCR_IB                    (1 << 16)
 112 #define EJTAG_DCR_INTE                  (1 << 4)
 113
 114 /* breakpoint support */
 115 #define EJTAG_IBS                               0xFF301000
 116 #define EJTAG_IBA1                              0xFF301100
 117 #define EJTAG_DBS                               0xFF302000
 118 #define EJTAG_DBA1                              0xFF302100
 119 #define EJTAG_DBCn_NOSB                 (1 << 13)
 120 #define EJTAG_DBCn_NOLB                 (1 << 12)
 121 #define EJTAG_DBCn_BLM_MASK             0xff
 122 #define EJTAG_DBCn_BLM_SHIFT    4
 123 #define EJTAG_DBCn_BE                   (1 << 0)
 124
 125 struct mips_ejtag {
 126         struct jtag_tap *tap;
 127         uint32_t impcode;
 128         uint32_t idcode;
 129         uint32_t ejtag_ctrl;
 130         int fast_access_save;
 131 };
 132
 133 void mips_ejtag_set_instr(struct mips_ejtag *ejtag_info,
 134                 int new_instr);
 135 int mips_ejtag_enter_debug(struct mips_ejtag *ejtag_info);
 136 int mips_ejtag_exit_debug(struct mips_ejtag *ejtag_info);
 137 int mips_ejtag_get_idcode(struct mips_ejtag *ejtag_info, uint32_t *idcode);
 138 void mips_ejtag_drscan_32_out(struct mips_ejtag *ejtag_info, uint32_t data);
 139 int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data);
 140 void mips_ejtag_drscan_8_out(struct mips_ejtag *ejtag_info, uint8_t data);
 141 int mips_ejtag_drscan_8(struct mips_ejtag *ejtag_info, uint32_t *data);
 142 int mips_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, int write_t, uint32_t *data);
 143
 144 int mips_ejtag_init(struct mips_ejtag *ejtag_info);
 145 int mips_ejtag_config_step(struct mips_ejtag *ejtag_info, int enable_step);
 146 int mips_ejtag_read_debug(struct mips_ejtag *ejtag_info, uint32_t* debug_reg);
 147
 148 static inline void mips_le_to_h_u32(jtag_callback_data_t arg)
 149 {
 150         uint8_t *in = (uint8_t *)arg;
 151         *((uint32_t *)arg) = le_to_h_u32(in);
 152 }
 153
 154 #endif /* MIPS_EJTAG */