+/**
+ * Transport-neutral representation of queued DAP transactions, supporting
+ * both JTAG and SWD transports. All submitted transactions are logically
+ * queued, until the queue is executed by run(). Some implementations might
+ * execute transactions as soon as they're submitted, but no status is made
+ * available until run().
+ */
+struct dap_ops {
+ /** connect operation for SWD */
+ int (*connect)(struct adiv5_dap *dap);
+
+ /** send a sequence to the DAP */
+ int (*send_sequence)(struct adiv5_dap *dap, enum swd_special_seq seq);
+
+ /** DP register read. */
+ int (*queue_dp_read)(struct adiv5_dap *dap, unsigned reg,
+ uint32_t *data);
+ /** DP register write. */
+ int (*queue_dp_write)(struct adiv5_dap *dap, unsigned reg,
+ uint32_t data);
+
+ /** AP register read. */
+ int (*queue_ap_read)(struct adiv5_ap *ap, unsigned reg,
+ uint32_t *data);
+ /** AP register write. */
+ int (*queue_ap_write)(struct adiv5_ap *ap, unsigned reg,
+ uint32_t data);
+
+ /** AP operation abort. */
+ int (*queue_ap_abort)(struct adiv5_dap *dap, uint8_t *ack);
+
+ /** Executes all queued DAP operations. */
+ int (*run)(struct adiv5_dap *dap);
+
+ /** Executes all queued DAP operations but doesn't check
+ * sticky error conditions */
+ int (*sync)(struct adiv5_dap *dap);
+
+ /** Optional; called at OpenOCD exit */
+ void (*quit)(struct adiv5_dap *dap);
+};
+
+/*
+ * Access Port types
+ */
+enum ap_type {
+ AP_TYPE_JTAG_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_NONE, 0), /* JTAG-AP */
+ AP_TYPE_COM_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_COM, 0), /* COM-AP */
+ AP_TYPE_AHB3_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_MEM_AP, 1), /* AHB3 Memory-AP */
+ AP_TYPE_APB_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_MEM_AP, 2), /* APB2 or APB3 Memory-AP */
+ AP_TYPE_AXI_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_MEM_AP, 4), /* AXI3 or AXI4 Memory-AP */
+ AP_TYPE_AHB5_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_MEM_AP, 5), /* AHB5 Memory-AP */
+ AP_TYPE_APB4_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_MEM_AP, 6), /* APB4 Memory-AP */
+ AP_TYPE_AXI5_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_MEM_AP, 7), /* AXI5 Memory-AP */
+ AP_TYPE_AHB5H_AP = AP_REG_IDR_VALUE(ARM_ID, AP_REG_IDR_CLASS_MEM_AP, 8), /* AHB5 with enhanced HPROT Memory-AP */
+};
+
+/* Check the ap->cfg_reg Long Address field (bit 1)
+ *
+ * 0b0: The AP only supports physical addresses 32 bits or smaller
+ * 0b1: The AP supports physical addresses larger than 32 bits
+ *
+ * @param ap The AP used for reading.
+ *
+ * @return true for 64 bit, false for 32 bit
+ */
+static inline bool is_64bit_ap(struct adiv5_ap *ap)
+{
+ return (ap->cfg_reg & MEM_AP_REG_CFG_LA) != 0;
+}
+
+/**
+ * Send an adi-v5 sequence to the DAP.
+ *
+ * @param dap The DAP used for reading.
+ * @param seq The sequence to send.
+ *
+ * @return ERROR_OK for success, else a fault code.
+ */
+static inline int dap_send_sequence(struct adiv5_dap *dap,
+ enum swd_special_seq seq)
+{
+ assert(dap->ops);
+ return dap->ops->send_sequence(dap, seq);
+}
+
+/**
+ * Queue a DP register read.
+ * Note that not all DP registers are readable; also, that JTAG and SWD
+ * have slight differences in DP register support.
+ *
+ * @param dap The DAP used for reading.
+ * @param reg The two-bit number of the DP register being read.
+ * @param data Pointer saying where to store the register's value
+ * (in host endianness).
+ *
+ * @return ERROR_OK for success, else a fault code.
+ */
+static inline int dap_queue_dp_read(struct adiv5_dap *dap,
+ unsigned reg, uint32_t *data)
+{
+ assert(dap->ops);
+ return dap->ops->queue_dp_read(dap, reg, data);
+}
+
+/**
+ * Queue a DP register write.
+ * Note that not all DP registers are writable; also, that JTAG and SWD
+ * have slight differences in DP register support.
+ *
+ * @param dap The DAP used for writing.
+ * @param reg The two-bit number of the DP register being written.
+ * @param data Value being written (host endianness)
+ *
+ * @return ERROR_OK for success, else a fault code.
+ */
+static inline int dap_queue_dp_write(struct adiv5_dap *dap,
+ unsigned reg, uint32_t data)
+{
+ assert(dap->ops);
+ return dap->ops->queue_dp_write(dap, reg, data);
+}
+
+/**
+ * Queue an AP register read.
+ *
+ * @param ap The AP used for reading.
+ * @param reg The number of the AP register being read.
+ * @param data Pointer saying where to store the register's value
+ * (in host endianness).
+ *
+ * @return ERROR_OK for success, else a fault code.
+ */
+static inline int dap_queue_ap_read(struct adiv5_ap *ap,
+ unsigned reg, uint32_t *data)
+{
+ assert(ap->dap->ops);
+ return ap->dap->ops->queue_ap_read(ap, reg, data);
+}
+
+/**
+ * Queue an AP register write.
+ *
+ * @param ap The AP used for writing.
+ * @param reg The number of the AP register being written.
+ * @param data Value being written (host endianness)
+ *
+ * @return ERROR_OK for success, else a fault code.
+ */
+static inline int dap_queue_ap_write(struct adiv5_ap *ap,
+ unsigned reg, uint32_t data)
+{
+ assert(ap->dap->ops);
+ return ap->dap->ops->queue_ap_write(ap, reg, data);
+}
+
+/**
+ * Queue an AP abort operation. The current AP transaction is aborted,
+ * including any update of the transaction counter. The AP is left in
+ * an unknown state (so it must be re-initialized). For use only after
+ * the AP has reported WAIT status for an extended period.
+ *
+ * @param dap The DAP used for writing.
+ * @param ack Pointer to where transaction status will be stored.
+ *
+ * @return ERROR_OK for success, else a fault code.
+ */
+static inline int dap_queue_ap_abort(struct adiv5_dap *dap, uint8_t *ack)
+{
+ assert(dap->ops);
+ return dap->ops->queue_ap_abort(dap, ack);
+}
+
+/**
+ * Perform all queued DAP operations, and clear any errors posted in the
+ * CTRL_STAT register when they are done. Note that if more than one AP
+ * operation will be queued, one of the first operations in the queue
+ * should probably enable CORUNDETECT in the CTRL/STAT register.
+ *
+ * @param dap The DAP used.
+ *
+ * @return ERROR_OK for success, else a fault code.
+ */
+static inline int dap_run(struct adiv5_dap *dap)
+{
+ assert(dap->ops);
+ return dap->ops->run(dap);
+}
+
+static inline int dap_sync(struct adiv5_dap *dap)
+{
+ assert(dap->ops);
+ if (dap->ops->sync)
+ return dap->ops->sync(dap);
+ return ERROR_OK;
+}
+
+static inline int dap_dp_read_atomic(struct adiv5_dap *dap, unsigned reg,
+ uint32_t *value)