#endif
 
 #include "arm11.h"
+#include "arm11_dbgtap.h"
 #include "armv4_5.h"
 #include "arm_simulator.h"
 #include "time_support.h"
 
 
 int arm11_register_commands(struct command_context_s *cmd_ctx);
 
-/* internals */
-
-void arm11_setup_field                 (arm11_common_t * arm11, int num_bits, void * in_data, void * out_data, scan_field_t * field);
-void arm11_add_IR                              (arm11_common_t * arm11, uint8_t instr, tap_state_t state);
-int arm11_add_debug_SCAN_N             (arm11_common_t * arm11, uint8_t chain, tap_state_t state);
-void arm11_add_debug_INST              (arm11_common_t * arm11, uint32_t inst, uint8_t * flag, tap_state_t state);
-int arm11_read_DSCR                            (arm11_common_t * arm11, uint32_t *dscr);
-int arm11_write_DSCR                   (arm11_common_t * arm11, uint32_t dscr);
-
-enum target_debug_reason arm11_get_DSCR_debug_reason(uint32_t dscr);
-
-int arm11_run_instr_data_prepare                       (arm11_common_t * arm11);
-int arm11_run_instr_data_finish                                (arm11_common_t * arm11);
-int arm11_run_instr_no_data                                    (arm11_common_t * arm11, uint32_t * opcode, size_t count);
-int arm11_run_instr_no_data1                           (arm11_common_t * arm11, uint32_t opcode);
-int arm11_run_instr_data_to_core                       (arm11_common_t * arm11, uint32_t opcode, uint32_t * data, size_t count);
-int arm11_run_instr_data_to_core_noack         (arm11_common_t * arm11, uint32_t opcode, uint32_t * data, size_t count);
-int arm11_run_instr_data_to_core1                      (arm11_common_t * arm11, uint32_t opcode, uint32_t data);
-int arm11_run_instr_data_from_core                     (arm11_common_t * arm11, uint32_t opcode, uint32_t * data, size_t count);
-int arm11_run_instr_data_from_core_via_r0      (arm11_common_t * arm11, uint32_t opcode, uint32_t * data);
-int arm11_run_instr_data_to_core_via_r0        (arm11_common_t * arm11, uint32_t opcode, uint32_t data);
-
-int arm11_add_dr_scan_vc(int num_fields, scan_field_t *fields, tap_state_t state);
-int arm11_add_ir_scan_vc(int num_fields, scan_field_t *fields, tap_state_t state);
-
-/** Used to make a list of read/write commands for scan chain 7
- *
- *  Use with arm11_sc7_run()
- */
-typedef struct arm11_sc7_action_s
-{
-       bool    write;                          /**< Access mode: true for write, false for read.       */
-       uint8_t         address;                        /**< Register address mode. Use enum #arm11_sc7         */
-       uint32_t                value;                          /**< If write then set this to value to be written.
-                                                                        In read mode this receives the read value when the
-                                                                        function returns.                                      */
-} arm11_sc7_action_t;
-
-int arm11_sc7_run(arm11_common_t * arm11, arm11_sc7_action_t * actions, size_t count);
-
-/* Mid-level helper functions */
-void arm11_sc7_clear_vbw(arm11_common_t * arm11);
-void arm11_sc7_set_vcr(arm11_common_t * arm11, uint32_t value);
-
-int arm11_read_memory_word(arm11_common_t * arm11, uint32_t address, uint32_t * result);
-
 #endif /* ARM11_H */
 
 #include "config.h"
 #endif
 
-#include "arm11.h"
+#include "arm11_dbgtap.h"
 
 #include "time_support.h"
 
 Conversely there may be other places in this code where the ARM11 code relies
 on the driver to hit through RTI when coming from Update-?R.
 */
-tap_state_t arm11_move_pi_to_si_via_ci[] =
+static const tap_state_t arm11_move_pi_to_si_via_ci[] =
 {
     TAP_IREXIT2, TAP_IRUPDATE, TAP_DRSELECT, TAP_IRSELECT, TAP_IRCAPTURE, TAP_IRSHIFT
 };
        return ERROR_OK;
 }
 
-tap_state_t arm11_move_pd_to_sd_via_cd[] =
+static const tap_state_t arm11_move_pd_to_sd_via_cd[] =
 {
        TAP_DREXIT2, TAP_DRUPDATE, TAP_DRSELECT, TAP_DRCAPTURE, TAP_DRSHIFT
 };
  *  https://lists.berlios.de/pipermail/openocd-development/2009-July/009698.html
  *  https://lists.berlios.de/pipermail/openocd-development/2009-August/009865.html
  */
-tap_state_t arm11_MOVE_DRPAUSE_IDLE_DRPAUSE_with_delay[] =
+static const tap_state_t arm11_MOVE_DRPAUSE_IDLE_DRPAUSE_with_delay[] =
 {
        TAP_DREXIT2, TAP_DRUPDATE, TAP_IDLE, TAP_IDLE, TAP_IDLE, TAP_DRSELECT, TAP_DRCAPTURE, TAP_DRSHIFT
 };
 
--- /dev/null
+#ifndef ARM11_DBGTAP_H
+#define ARM11_DBGTAP_H
+
+#include "arm11.h"
+
+/* ARM11 internals */
+
+void arm11_setup_field(arm11_common_t *arm11, int num_bits,
+               void *in_data, void *out_data, scan_field_t *field);
+void arm11_add_IR(arm11_common_t *arm11,
+               uint8_t instr, tap_state_t state);
+int arm11_add_debug_SCAN_N(arm11_common_t *arm11,
+               uint8_t chain, tap_state_t state);
+void arm11_add_debug_INST(arm11_common_t *arm11,
+               uint32_t inst, uint8_t *flag, tap_state_t state);
+int arm11_read_DSCR(arm11_common_t *arm11, uint32_t *dscr);
+int arm11_write_DSCR(arm11_common_t *arm11, uint32_t dscr);
+
+enum target_debug_reason arm11_get_DSCR_debug_reason(uint32_t dscr);
+
+int arm11_run_instr_data_prepare(arm11_common_t *arm11);
+int arm11_run_instr_data_finish(arm11_common_t *arm11);
+int arm11_run_instr_no_data(arm11_common_t *arm11,
+               uint32_t *opcode, size_t count);
+int arm11_run_instr_no_data1(arm11_common_t *arm11, uint32_t opcode);
+int arm11_run_instr_data_to_core(arm11_common_t *arm11,
+               uint32_t opcode, uint32_t *data, size_t count);
+int arm11_run_instr_data_to_core_noack(arm11_common_t *arm11,
+               uint32_t opcode, uint32_t *data, size_t count);
+int arm11_run_instr_data_to_core1(arm11_common_t *arm11,
+               uint32_t opcode, uint32_t data);
+int arm11_run_instr_data_from_core(arm11_common_t *arm11,
+               uint32_t opcode, uint32_t *data, size_t count);
+int arm11_run_instr_data_from_core_via_r0(arm11_common_t *arm11,
+               uint32_t opcode, uint32_t *data);
+int arm11_run_instr_data_to_core_via_r0(arm11_common_t *arm11,
+               uint32_t opcode, uint32_t data);
+
+int arm11_add_dr_scan_vc(int num_fields, scan_field_t *fields,
+               tap_state_t state);
+int arm11_add_ir_scan_vc(int num_fields, scan_field_t *fields,
+               tap_state_t state);
+
+/**
+ * Used with arm11_sc7_run to make a list of read/write commands for
+ * scan chain 7
+ */
+typedef struct arm11_sc7_action_s
+{
+       bool write; /**< Access mode: true for write, false for read. */
+       uint8_t address; /**< Register address mode. Use enum #arm11_sc7 */
+       /**
+        * If write then set this to value to be written.  In read mode
+        * this receives the read value when the function returns.
+        */
+       uint32_t value;
+} arm11_sc7_action_t;
+
+int arm11_sc7_run(arm11_common_t *arm11,
+               arm11_sc7_action_t *actions, size_t count);
+
+/* Mid-level helper functions */
+void arm11_sc7_clear_vbw(arm11_common_t *arm11);
+void arm11_sc7_set_vcr(arm11_common_t *arm11, uint32_t value);
+
+int arm11_read_memory_word(arm11_common_t *arm11,
+               uint32_t address, uint32_t *result);
+
+#endif // ARM11_DBGTAP_H