src/add-ons/kernel/debugger/bochs/bochs.cpp

   1 /*
   2  * Copyright 2008, Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              François Revol, revol@free.fr
   7  */
   8
   9
  10 #include <debug.h>
  11 #include <driver_settings.h>
  12 #include <ISA.h>
  13
  14 static isa_module_info *sISAModule;
  15
  16
  17 static int
  18 debugger_puts(const char *s, int32 length)
  19 {
  20         int i;
  21         for (i = 0; i < length; i++)
  22                 sISAModule->write_io_8(0xe9, s[i]);
  23         return i;
  24 }
  25
  26
  27 static status_t
  28 std_ops(int32 op, ...)
  29 {
  30         void *handle;
  31         bool load = false;
  32
  33         switch (op) {
  34         case B_MODULE_INIT:
  35                 handle = load_driver_settings("kernel");
  36                 if (handle) {
  37                         load = get_driver_boolean_parameter(handle,
  38                                 "bochs_debug_output", load, true);
  39                         unload_driver_settings(handle);
  40                 }
  41                 if (load) {
  42                         if (get_module(B_ISA_MODULE_NAME, (module_info **)&sISAModule) < B_OK)
  43                                 return B_ERROR;
  44                 }
  45                 return load ? B_OK : B_ERROR;
  46         case B_MODULE_UNINIT:
  47                 put_module(B_ISA_MODULE_NAME);
  48                 return B_OK;
  49         }
  50         return B_BAD_VALUE;
  51 }
  52
  53
  54 static struct debugger_module_info sModuleInfo = {
  55         {
  56                 "debugger/bochs/v1",
  57                 0,
  58                 &std_ops
  59         },
  60         NULL,
  61         NULL,
  62         debugger_puts,
  63         NULL
  64 };
  65
  66 module_info *modules[] = {
  67         (module_info *)&sModuleInfo,
  68         NULL
  69 };
  70