ski.c

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/*
 * Copyright (c) 2005 Jakub Jermar
 * Copyright (c) 2008 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <async.h>
#include <libc.h>
#include <sysinfo.h>
#include <as.h>
#include <ddi.h>

#include "serial_console.h"
#include "ski.h"

#define SKI_PUTCHAR             31

#define WIDTH 80
#define HEIGHT 24

static void ski_putc(const char ch)
{
        asm volatile (
                "mov r15 = %0\n"
                "mov r32 = %1\n"        /* r32 is in0 */
                "break 0x80000\n"       /* modifies r8 */
                :
                : "i" (SKI_PUTCHAR), "r" (ch)
                : "r15", "in0", "r8"
        );
        
        if (ch == '\n')
                ski_putc('\r');
}

int ski_init(void)
{
        serial_console_init(ski_putc, WIDTH, HEIGHT);
        
        async_set_client_connection(serial_client_connection);
        return 0;
}

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