bsps: Move zynq-uart to bsps/shared

This moves the zynq-uart driver from bsps/arm/shared to bsps/shared to
accomodate use by AArch64 BSPs.

bsps/include/dev/serial/zynq-uart.h

@@ -0,0 +1,85 @@
+/**
+ * @file
+ * @ingroup zynq_uart
+ * @brief UART support.
+ */
+
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2013, XXX embedded brains GmbH
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LIBBSP_ARM_XILINX_ZYNQ_UART_H
+#define LIBBSP_ARM_XILINX_ZYNQ_UART_H
+
+#include <rtems/termiostypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @defgroup zynq_uart UART Support
+ * @ingroup RTEMSBSPsARMZynq
+ * @brief UART Support
+ *
+ * This driver operates an instance of the Cadence UART present in the
+ * family of Xilinx Zynq SoCs.
+ */
+
+typedef struct {
+  rtems_termios_device_context base;
+  volatile struct zynq_uart *regs;
+  bool transmitting;
+  rtems_vector_number irq;
+} zynq_uart_context;
+
+extern const rtems_termios_device_handler zynq_uart_handler;
+
+#define ZYNQ_UART_DEFAULT_BAUD 115200
+
+#ifndef ZYNQ_CLOCK_UART
+#define ZYNQ_CLOCK_UART 100000000
+#endif
+
+void zynq_uart_initialize(rtems_termios_device_context *base);
+
+int zynq_uart_read_polled(rtems_termios_device_context *base);
+
+void zynq_uart_write_polled(
+  rtems_termios_device_context *base,
+  char c
+);
+
+/**
+  * Flush TX FIFO and wait until it is empty. Used in bsp_reset.
+  */
+void zynq_uart_reset_tx_flush(zynq_uart_context *ctx);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBBSP_ARM_XILINX_ZYNQ_UART_H */