27 lines
1.2 KiB
C
27 lines
1.2 KiB
C
#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_UART_H_
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#define COSMOPOLITAN_LIBC_NEXGEN32E_UART_H_
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#define COM1 0x0
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#define COM2 0x2
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#define COM3 0x4
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#define COM4 0x6
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#define IRQ3 0x0b /* com2 interrupt number (irq3) */
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#define IRQ4 0x0c /* com1 interrupt number (irq4) */
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#define UART_DLAB (1 << 7) /* serial line conf mode bit */
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#define UART_DLL 0 /* divisor latch register */
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#define UART_DLM 1 /* divisor latch register */
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#define UART_IIR 2 /* interrupt identification register */
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#define UART_LCR 3 /* line control register */
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#define UART_MCR 4 /* modem control register */
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#define UART_LSR 5 /* line status register */
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#define UART_TTYDA (1 << 0) /* data available (rx ready) */
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#define UART_TTYOE (1 << 1) /* overrun error */
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#define UART_TTYPE (1 << 2) /* parity error */
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#define UART_TTYFE (1 << 3) /* framing error */
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#define UART_TTYBSR (1 << 4) /* break signal received */
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#define UART_TTYTXR (1 << 5) /* serial thr empty (tx ready) */
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#define UART_TTYIDL (1 << 6) /* serial thr empty and line idle */
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#define UART_TTYEDF (1 << 7) /* erroneous data in fifo */
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#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_UART_H_ */
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