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#ifndef JTAG_DTM_H
#define JTAG_DTM_H
#include <stdint.h>
class debug_module_t;
typedef enum {
TEST_LOGIC_RESET,
RUN_TEST_IDLE,
SELECT_DR_SCAN,
CAPTURE_DR,
SHIFT_DR,
EXIT1_DR,
PAUSE_DR,
EXIT2_DR,
UPDATE_DR,
SELECT_IR_SCAN,
CAPTURE_IR,
SHIFT_IR,
EXIT1_IR,
PAUSE_IR,
EXIT2_IR,
UPDATE_IR
} jtag_state_t;
class jtag_dtm_t
{
static const unsigned idcode = 0xdeadbeef;
public:
jtag_dtm_t(debug_module_t *dm, unsigned required_rti_cycles);
void reset();
void set_pins(bool tck, bool tms, bool tdi);
bool tdo() const { return _tdo; }
jtag_state_t state() const { return _state; }
private:
debug_module_t *dm;
// The number of Run-Test/Idle cycles required before a DMI access is
// complete.
unsigned required_rti_cycles;
bool _tck, _tms, _tdi, _tdo;
uint32_t ir;
const unsigned ir_length = 5;
uint64_t dr;
unsigned dr_length;
// abits must come before dtmcontrol so it can easily be used in the
// constructor.
const unsigned abits = 6;
uint32_t dtmcontrol;
uint64_t dmi;
unsigned bypass;
// Number of Run-Test/Idle cycles needed before we call this access
// complete.
unsigned rti_remaining;
bool busy_stuck;
jtag_state_t _state;
void capture_dr();
void update_dr();
};
#endif
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