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1596 palkovsky 1 
/*
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 * Copyright (c) 2006 Ondrej Palkovsky
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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 klog KLog
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 * @brief HelenOS KLog
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 * @{
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 */
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/**
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 * @file
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 */
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#include <stdio.h>
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#include <ipc/ipc.h>
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#include <async.h>
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#include <ipc/services.h>
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#include <as.h>
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#include <sysinfo.h>
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#include <event.h>
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#include <errno.h>
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#include <io/klog.h>
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#define NAME  "klog"
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/* Pointer to klog area */
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static wchar_t *klog;
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static size_t klog_length;
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static void interrupt_received(ipc_callid_t callid, ipc_call_t *call)
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{
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    size_t klog_start = (size_t) IPC_GET_ARG1(*call);
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    size_t klog_len = (size_t) IPC_GET_ARG2(*call);
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    size_t klog_stored = (size_t) IPC_GET_ARG3(*call);
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    size_t i;
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    for (i = klog_len - klog_stored; i < klog_len; i++)
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        putchar(klog[(klog_start + i) % klog_length]);
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}
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int main(int argc, char *argv[])
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{
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    size_t klog_pages = sysinfo_value("klog.pages");
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    size_t klog_size = klog_pages * PAGE_SIZE;
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    klog_length = klog_size / sizeof(wchar_t);
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    klog = (wchar_t *) as_get_mappable_page(klog_size);
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    if (klog == NULL) {
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        printf(NAME ": Error allocating memory area\n");
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        return -1;
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    }
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    int res = ipc_share_in_start_1_0(PHONE_NS, (void *) klog,
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        klog_size, SERVICE_MEM_KLOG);
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    if (res != EOK) {
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        printf(NAME ": Error initializing memory area\n");
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        return -1;
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    }
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    if (event_subscribe(EVENT_KLOG, 0) != EOK) {
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        printf(NAME ": Error registering klog notifications\n");
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        return -1;
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    }
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    async_set_interrupt_received(interrupt_received);
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    klog_update();
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    async_manager();
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    return 0;
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}
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/** @}
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 */