reactos/ntoskrnl/kd/wrappers/bochs.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            ntoskrnl/kd/wrappers/bochs.c
   5  * PURPOSE:         BOCHS Wrapper for Kd
   6  *
   7  * PROGRAMMERS:     Alex Ionescu (alex@relsoft.net)
   8  */
   9
  10 #include <ntoskrnl.h>
  11 #define NDEBUG
  12 #include <internal/debug.h>
  13
  14 /* bochs debug output */
  15 #define BOCHS_LOGGER_PORT (0xe9)
  16
  17 /* FUNCTIONS *****************************************************************/
  18
  19 VOID
  20 STDCALL
  21 KdpBochsDebugPrint(IN PCH Message)
  22 {
  23     while (*Message != 0)
  24     {
  25         if (*Message == '\n')
  26         {
  27 #if defined(_M_IX86) && defined(__GNUC__)
  28            /* Don't use WRITE_PORT_UCHAR because hal isn't initialized yet in the very early boot phase. */
  29            __asm__("outb %b0, %w1\n\t" :: "a" ('\r'), "d" (BOCHS_LOGGER_PORT));
  30 #else
  31            WRITE_PORT_UCHAR((PUCHAR)BOCHS_LOGGER_PORT, '\r');
  32 #endif
  33         }
  34 #if defined(_M_IX86) && defined(__GNUC__)
  35         /* Don't use WRITE_PORT_UCHAR because hal isn't initialized yet in the very early boot phase. */
  36         __asm__("outb %b0, %w1\n\t" :: "a" (*Message), "d" (BOCHS_LOGGER_PORT));
  37 #else
  38         WRITE_PORT_UCHAR((PUCHAR)BOCHS_LOGGER_PORT, *Message);
  39 #endif
  40         Message++;
  41     }
  42 }
  43
  44
  45
  46 VOID
  47 STDCALL
  48 KdpBochsInit(PKD_DISPATCH_TABLE WrapperTable,
  49              ULONG BootPhase)
  50 {
  51     if (!KdpDebugMode.Bochs) return;
  52
  53     if (BootPhase == 0)
  54     {
  55         /* Write out the functions that we support for now */
  56         WrapperTable->KdpInitRoutine = KdpBochsInit;
  57         WrapperTable->KdpPrintRoutine = KdpBochsDebugPrint;
  58     }
  59     else if (BootPhase == 2)
  60     {
  61         HalDisplayString("\n   Bochs debugging enabled\n\n");
  62     }
  63 }
  64
  65 /* EOF */