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  1. /*
  2.  * Copyright (c) 2006 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup klog KLog
  30.  * @brief   HelenOS KLog
  31.  * @{
  32.  */
  33. /**
  34.  * @file
  35.  */
  36.  
  37. #include <stdio.h>
  38. #include <ipc/ipc.h>
  39. #include <async.h>
  40. #include <ipc/services.h>
  41. #include <as.h>
  42. #include <sysinfo.h>
  43.  
  44. /* Pointer to klog area */
  45. static char *klog;
  46.  
  47. static void interrupt_received(ipc_callid_t callid, ipc_call_t *call)
  48. {
  49.     int i;
  50.    
  51.     async_serialize_start();
  52.     for (i=0; klog[i + IPC_GET_ARG1(*call)] && i < IPC_GET_ARG2(*call); i++)
  53.         putchar(klog[i + IPC_GET_ARG1(*call)]);
  54.     putchar('\n');
  55.     async_serialize_end();
  56. }
  57.  
  58. int main(int argc, char *argv[])
  59. {
  60.     int res;
  61.     void *mapping;
  62.  
  63.     printf("Kernel console output.\n");
  64.    
  65.     mapping = as_get_mappable_page(PAGE_SIZE);
  66.     res = ipc_call_sync_3(PHONE_NS, IPC_M_AS_AREA_RECV,
  67.                   (sysarg_t) mapping, PAGE_SIZE, SERVICE_MEM_KLOG,
  68.                   NULL, NULL, NULL);
  69.     if (res) {
  70.         printf("Failed to initialize klog memarea\n");
  71.         _exit(1);
  72.     }
  73.     klog = mapping;
  74.  
  75.     int inr = sysinfo_value("klog.inr");
  76.     int devno = sysinfo_value("klog.devno");
  77.     if (ipc_register_irq(inr, devno, 0, NULL)) {
  78.         printf("Error registering for klog service.\n");
  79.         return 0;
  80.     }
  81.  
  82.     async_set_interrupt_received(interrupt_received);
  83.  
  84.     async_manager();
  85.  
  86.     return 0;
  87. }
  88.  
  89. /** @}
  90.  */
  91.