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82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/*
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* Copyright (c) 2014-2017, Stefan Lankes, Daniel Krebs, RWTH Aachen University
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <hermit/stdlib.h>
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#include <hermit/stdio.h>
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#include <hermit/errno.h>
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#include <hermit/string.h>
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#include <hermit/ctype.h>
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#include <asm/uart.h>
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volatile static unsigned int* mmio = NULL;
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extern unsigned int uart_mmio;
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/* Puts a single character on a serial device */
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int uart_putchar(unsigned char c)
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{
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if (mmio)
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*mmio = (unsigned int) c;
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return (int) c;
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}
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/* Uses the routine above to output a string... */
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int uart_puts(const char *text)
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{
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size_t i, len = strlen(text);
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if (!mmio)
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return 0;
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for (i = 0; i < len; i++)
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uart_putchar(text[i]);
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return len;
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}
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int uart_early_init(char* cmdline)
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{
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if (is_uhyve()) {
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mmio = (unsigned int*) uart_mmio;
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} else {
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// default value of our QEMU configuration
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mmio = (unsigned int*) 0x09000000;
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}
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return 0;
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}
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int uart_init(void)
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{
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if (is_uhyve()) {
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mmio = (unsigned int*) uart_mmio;
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} else {
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mmio = (unsigned int*) 0x09000000;
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}
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return 0;
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}
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