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3743 rimsky 1
/*
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 * Copyright (c) 2008 Pavel Rimsky
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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
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 * are met:
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 *
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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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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * 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
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup sparc64
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 * @{
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 */
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/**
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 * @file
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 * @brief   Niagara input/output driver based on hypervisor calls.
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 */
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#include <arch/drivers/niagara.h>
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#include <console/chardev.h>
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#include <console/console.h>
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#include <arch/sun4v/hypercall.h>
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/* functions referenced from definitions of I/O operations structures */
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static void niagara_putchar(chardev_t *, const char);
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/** character device operations */
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static chardev_operations_t niagara_ops = {
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    .write = niagara_putchar
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};
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/** Niagara character device */
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chardev_t niagara_io;
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/** Writes a single character to the standard output. */
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static void niagara_putchar(struct chardev * cd, const char c)
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{
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    __hypercall_fast1(CONS_PUTCHAR, c);
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    if (c == '\n')
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        __hypercall_fast1(CONS_PUTCHAR, '\r');
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}
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/**
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 * Grabs the input for kernel.
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 */
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void niagara_grab(void)
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{
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}
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/**
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 * Releases the input so that userspace can use it.
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 */
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void niagara_release(void)
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{
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}
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/**
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 * Initializes the input/output subsystem so that the Niagara standard
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 * input/output is used.
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 */
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void niagara_init(void)
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{
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    chardev_initialize("niagara_io", &niagara_io, &niagara_ops);
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    stdin = &niagara_io;
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    stdout = &niagara_io;
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}
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/** @}
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 */