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-rw-r--r--include/hw/char/ibex_uart.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/include/hw/char/ibex_uart.h b/include/hw/char/ibex_uart.h
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+++ b/include/hw/char/ibex_uart.h
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+/*
+ * QEMU lowRISC Ibex UART device
+ *
+ * Copyright (c) 2020 Western Digital
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HW_IBEX_UART_H
+#define HW_IBEX_UART_H
+
+#include "hw/sysbus.h"
+#include "hw/registerfields.h"
+#include "chardev/char-fe.h"
+#include "qemu/timer.h"
+#include "qom/object.h"
+
+#define IBEX_UART_TX_FIFO_SIZE 16
+#define IBEX_UART_CLOCK 50000000 /* 50MHz clock */
+
+#define TYPE_IBEX_UART "ibex-uart"
+OBJECT_DECLARE_SIMPLE_TYPE(IbexUartState, IBEX_UART)
+
+struct IbexUartState {
+ /* <private> */
+ SysBusDevice parent_obj;
+
+ /* <public> */
+ MemoryRegion mmio;
+
+ uint8_t tx_fifo[IBEX_UART_TX_FIFO_SIZE];
+ uint32_t tx_level;
+
+ uint32_t rx_level;
+
+ QEMUTimer *fifo_trigger_handle;
+ uint64_t char_tx_time;
+
+ uint32_t uart_intr_state;
+ uint32_t uart_intr_enable;
+ uint32_t uart_ctrl;
+ uint32_t uart_status;
+ uint32_t uart_rdata;
+ uint32_t uart_fifo_ctrl;
+ uint32_t uart_fifo_status;
+ uint32_t uart_ovrd;
+ uint32_t uart_val;
+ uint32_t uart_timeout_ctrl;
+
+ Clock *f_clk;
+
+ CharBackend chr;
+ qemu_irq tx_watermark;
+ qemu_irq rx_watermark;
+ qemu_irq tx_empty;
+ qemu_irq rx_overflow;
+};
+#endif /* HW_IBEX_UART_H */