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                    IN ULONG Length)
  23 {
  24     while (*Message != 0)
  25     {
  26         if (*Message == '\n')
  27         {
  28 #if defined(_M_IX86) && defined(__GNUC__)
  29            /* Don't use WRITE_PORT_UCHAR because hal isn't initialized yet in the very early boot phase. */
  30            __asm__("outb %b0, %w1\n\t" :: "a" ('\r'), "d" (BOCHS_LOGGER_PORT));
  31 #else
  32            WRITE_PORT_UCHAR((PUCHAR)BOCHS_LOGGER_PORT, '\r');
  33 #endif
  34         }
  35 #if defined(_M_IX86) && defined(__GNUC__)
  36         /* Don't use WRITE_PORT_UCHAR because hal isn't initialized yet in the very early boot phase. */
  37         __asm__("outb %b0, %w1\n\t" :: "a" (*Message), "d" (BOCHS_LOGGER_PORT));
  38 #else
  39         WRITE_PORT_UCHAR((PUCHAR)BOCHS_LOGGER_PORT, *Message);
  40 #endif
  41         Message++;
  42     }
  43 }
  44
  45 VOID
  46 STDCALL
  47 KdpBochsInit(PKD_DISPATCH_TABLE WrapperTable,
  48              ULONG BootPhase)
  49 {
  50     if (!KdpDebugMode.Bochs) return;
  51
  52     if (BootPhase == 0)
  53     {
  54         /* Write out the functions that we support for now */
  55         WrapperTable->KdpInitRoutine = KdpBochsInit;
  56         WrapperTable->KdpPrintRoutine = KdpBochsDebugPrint;
  57     }
  58     else if (BootPhase == 2)
  59     {
  60         HalDisplayString("\n   Bochs debugging enabled\n\n");
  61     }
  62 }
  63
  64 /* EOF */