+#define EJTAG_VERSION_20 0
+#define EJTAG_VERSION_25 1
+#define EJTAG_VERSION_26 2
+#define EJTAG_VERSION_31 3
+#define EJTAG_VERSION_41 4
+#define EJTAG_VERSION_51 5
+
+struct mips_ejtag {
+ struct jtag_tap *tap;
+ uint32_t impcode;
+ uint32_t idcode;
+ uint32_t ejtag_ctrl;
+ int fast_access_save;
+ uint32_t config_regs; /* number of config registers read */
+ uint32_t config[4]; /* cp0 config to config3 */
+
+ uint32_t reg8;
+ uint32_t reg9;
+ unsigned scan_delay;
+ int mode;
+ uint32_t pa_ctrl;
+ uint32_t pa_addr;
+ unsigned int ejtag_version;
+ uint32_t isa;
+ uint32_t endianness;
+
+ /* Memory-Mapped Registers. This addresses are not same on different
+ * EJTAG versions. */
+ uint32_t debug_caps;
+ uint32_t ejtag_ibs_addr; /* Instruction Address Break Status */
+ uint32_t ejtag_iba0_addr; /* IAB channel 0 */
+ uint32_t ejtag_ibc_offs; /* IAB Control offset */
+ uint32_t ejtag_ibm_offs; /* IAB Mask offset */
+ uint32_t ejtag_ibasid_offs; /* IAB ASID (4Kc) */
+
+ uint32_t ejtag_dbs_addr; /* Data Address Break Status Register */
+ uint32_t ejtag_dba0_addr; /* DAB channel 0 */
+ uint32_t ejtag_dbc_offs; /* DAB Control offset */
+ uint32_t ejtag_dbm_offs; /* DAB Mask offset */
+ uint32_t ejtag_dbv_offs; /* DAB Value offset */
+ uint32_t ejtag_dbasid_offs; /* DAB ASID (4Kc) */
+
+ uint32_t ejtag_iba_step_size;
+ uint32_t ejtag_dba_step_size; /* size of step till next *DBAn register. */
+};
+
+void mips_ejtag_set_instr(struct mips_ejtag *ejtag_info, uint32_t new_instr);
+int mips_ejtag_enter_debug(struct mips_ejtag *ejtag_info);
+int mips_ejtag_exit_debug(struct mips_ejtag *ejtag_info);
+int mips_ejtag_get_idcode(struct mips_ejtag *ejtag_info);
+void mips_ejtag_add_scan_96(struct mips_ejtag *ejtag_info,
+ uint32_t ctrl, uint32_t data, uint8_t *in_scan_buf);
+void mips_ejtag_drscan_32_out(struct mips_ejtag *ejtag_info, uint32_t data);
+int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data);
+void mips_ejtag_drscan_8_out(struct mips_ejtag *ejtag_info, uint8_t data);
+int mips_ejtag_drscan_8(struct mips_ejtag *ejtag_info, uint8_t *data);
+int mips_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, int write_t, uint32_t *data);
+
+int mips_ejtag_init(struct mips_ejtag *ejtag_info);
+int mips_ejtag_config_step(struct mips_ejtag *ejtag_info, int enable_step);
+
+static inline void mips_le_to_h_u32(jtag_callback_data_t arg)