99 static int uart_data_to_read(UART *uart)  in uart_data_to_read()  argument
101     return uart->current < uart->len;  in uart_data_to_read()
104 static char uart_pop(UART *uart)  in uart_pop()  argument
108     if (uart->len == 0) {  in uart_pop()
109         uart->status &= ~UART_DATA_READY;  in uart_pop()
113     ret = uart->buffer[uart->current++];  in uart_pop()
115     if (uart->current >= uart->len) {  in uart_pop()
117         uart->len     = 0;  in uart_pop()
118         uart->current = 0;  in uart_pop()
121     if (!uart_data_to_read(uart)) {  in uart_pop()
122         uart->status &= ~UART_DATA_READY;  in uart_pop()
128 static void uart_add_to_fifo(UART          *uart,  in uart_add_to_fifo()  argument
132     if (uart->len + length > FIFO_LENGTH) {  in uart_add_to_fifo()
135     memcpy(uart->buffer + uart->len, buffer, length);  in uart_add_to_fifo()
136     uart->len += length;  in uart_add_to_fifo()
141     UART *uart = opaque;  in grlib_apbuart_can_receive()  local
143     return FIFO_LENGTH - uart->len;  in grlib_apbuart_can_receive()
148     UART *uart = opaque;  in grlib_apbuart_receive()  local
150     if (uart->control & UART_RECEIVE_ENABLE) {  in grlib_apbuart_receive()
151         uart_add_to_fifo(uart, buf, size);  in grlib_apbuart_receive()
153         uart->status |= UART_DATA_READY;  in grlib_apbuart_receive()
155         if (uart->control & UART_RECEIVE_INTERRUPT) {  in grlib_apbuart_receive()
156             qemu_irq_pulse(uart->irq);  in grlib_apbuart_receive()
170     UART     *uart = opaque;  in grlib_apbuart_read()  local
178         return uart_pop(uart);  in grlib_apbuart_read()
182         return uart->status;  in grlib_apbuart_read()
185         return uart->control;  in grlib_apbuart_read()
200     UART          *uart = opaque;  in grlib_apbuart_write()  local
210         if (qemu_chr_fe_backend_connected(&uart->chr) &&  in grlib_apbuart_write()
211             (uart->control & UART_TRANSMIT_ENABLE)) {  in grlib_apbuart_write()
215             qemu_chr_fe_write_all(&uart->chr, &c, 1);  in grlib_apbuart_write()
217             if (uart->control & UART_TRANSMIT_INTERRUPT) {  in grlib_apbuart_write()
218                 qemu_irq_pulse(uart->irq);  in grlib_apbuart_write()
228         uart->control = value;  in grlib_apbuart_write()
250     UART *uart = GRLIB_APB_UART(dev);  in grlib_apbuart_realize()  local
253     qemu_chr_fe_set_handlers(&uart->chr,  in grlib_apbuart_realize()
257                              NULL, uart, NULL, true);  in grlib_apbuart_realize()
259     sysbus_init_irq(sbd, &uart->irq);  in grlib_apbuart_realize()
261     memory_region_init_io(&uart->iomem, OBJECT(uart), &grlib_apbuart_ops, uart,  in grlib_apbuart_realize()
264     sysbus_init_mmio(sbd, &uart->iomem);  in grlib_apbuart_realize()
269     UART *uart = GRLIB_APB_UART(d);  in grlib_apbuart_reset()  local
272     uart->status =  UART_TRANSMIT_FIFO_EMPTY | UART_TRANSMIT_SHIFT_EMPTY;  in grlib_apbuart_reset()
274     uart->control = 0;  in grlib_apbuart_reset()
276     uart->len = 0;  in grlib_apbuart_reset()
277     uart->current = 0;  in grlib_apbuart_reset()