51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/*
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* Copyright (c) 2007, 2008, ETH Zurich.
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* All rights reserved.
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*
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* This file is distributed under the terms in the attached LICENSE file.
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* If you do not find this file, copies can be found by writing to:
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* ETH Zurich D-INFK, Universitaetstrasse 6, CH-8092 Zurich. Attn: Systems Group.
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*/
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#ifndef __LPUART_H__
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#define __LPUART_H__
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#include <barrelfish_kpi/types.h>
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#include <stdbool.h>
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/*
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* We can handle up to 6 UARTS; should be enough for anyone...
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*/
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#define LPUART_MAX_PORTS 6
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/*
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* \briefConfigure a port.
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*
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* This happens at system startup, and before the MMU is turned on.
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* The hardware is not initialized by this call.
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* After this, the UART is (hopefully) usable, but after the MMU is
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* enabled the OS should then call pl011_init below.
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*/
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extern void lpuart_configure(unsigned port, lpaddr_t addr);
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/*
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* \brief Initialize a UART, and a number to refer to it in the
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* future.
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*
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* \param port : Physical address of the UART.
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* \param hwinit : Also init the hardware itself if True
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*/
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extern void lpuart_init(unsigned port, lvaddr_t base, bool hwinit);
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/*
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* \brief Put a character to the port
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*/
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extern void lpuart_putchar(unsigned port, char c);
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/*
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* \brief Read a character from a port
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*/
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extern char lpuart_getchar(unsigned port);
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#endif // __LPUART_H__
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