reactos/ntoskrnl/kd/i386/kdbg.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            drivers/base/kdcom/kdbg.c
   5  * PURPOSE:         Serial i/o functions for the kernel debugger.
   6  * PROGRAMMER:      Alex Ionescu
   7  *                  Hervé Poussineau
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include <ntoskrnl.h>
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16
  17 #define DEFAULT_BAUD_RATE   19200
  18
  19 #if defined(_M_IX86) || defined(_M_AMD64)
  20 const ULONG BaseArray[] = {0, 0x3F8, 0x2F8, 0x3E8, 0x2E8};
  21 #elif defined(_M_PPC)
  22 const ULONG BaseArray[] = {0, 0x800003F8};
  23 #elif defined(_M_MIPS)
  24 const ULONG BaseArray[] = {0, 0x80006000, 0x80007000};
  25 #elif defined(_M_ARM)
  26 const ULONG BaseArray[] = {0, 0xF1012000};
  27 #else
  28 #error Unknown architecture
  29 #endif
  30
  31 /* STATIC VARIABLES ***********************************************************/
  32
  33 // static CPPORT DefaultPort = {0, 0, 0};
  34
  35 /* The COM port must only be initialized once! */
  36 // static BOOLEAN PortInitialized = FALSE;
  37
  38
  39 /* REACTOS FUNCTIONS **********************************************************/
  40
  41 NTSTATUS
  42 NTAPI
  43 KdDebuggerInitialize1(
  44     IN PLOADER_PARAMETER_BLOCK LoaderBlock OPTIONAL)
  45 {
  46     return STATUS_NOT_IMPLEMENTED;
  47 }
  48
  49 BOOLEAN
  50 NTAPI
  51 KdPortInitializeEx(
  52     IN PCPPORT PortInformation,
  53     IN ULONG ComPortNumber)
  54 {
  55     NTSTATUS Status;
  56     CHAR buffer[80];
  57
  58 #if 0 // Deactivated because never used in fact (was in KdPortInitialize but we use KdPortInitializeEx)
  59     /*
  60      * Find the port if needed
  61      */
  62     SIZE_T i;
  63
  64     if (!PortInitialized)
  65     {
  66         DefaultPort.BaudRate = PortInformation->BaudRate;
  67
  68         if (ComPortNumber == 0)
  69         {
  70             /*
  71              * Start enumerating COM ports from the last one to the first one,
  72              * and break when we find a valid port.
  73              * If we reach the first element of the list, the invalid COM port,
  74              * then it means that no valid port was found.
  75              */
  76             for (i = sizeof(BaseArray) / sizeof(BaseArray[0]) - 1; i > 0; i--)
  77             {
  78                 if (CpDoesPortExist(UlongToPtr(BaseArray[i])))
  79                 {
  80                     PortInformation->Address = DefaultPort.Address = BaseArray[i];
  81                     ComPortNumber = (ULONG)i;
  82                     break;
  83                 }
  84             }
  85             if (ComPortNumber == 0)
  86             {
  87                 sprintf(buffer,
  88                         "\nKernel Debugger: No COM port found!\n\n");
  89                 HalDisplayString(buffer);
  90                 return FALSE;
  91             }
  92         }
  93
  94         PortInitialized = TRUE;
  95     }
  96 #endif
  97
  98     /*
  99      * Initialize the port
 100      */
 101     Status = CpInitialize(PortInformation,
 102                           (ComPortNumber == 0 ? PortInformation->Address
 103                                               : UlongToPtr(BaseArray[ComPortNumber])),
 104                           (PortInformation->BaudRate == 0 ? DEFAULT_BAUD_RATE
 105                                                           : PortInformation->BaudRate));
 106     if (!NT_SUCCESS(Status))
 107     {
 108         sprintf(buffer,
 109                 "\nKernel Debugger: Serial port not found!\n\n");
 110         HalDisplayString(buffer);
 111         return FALSE;
 112     }
 113     else
 114     {
 115 #ifndef NDEBUG
 116         /* Print message to blue screen */
 117         sprintf(buffer,
 118                 "\nKernel Debugger: Serial port found: COM%ld (Port 0x%lx) BaudRate %ld\n\n",
 119                 ComPortNumber,
 120                 PortInformation->Address,
 121                 PortInformation->BaudRate);
 122         HalDisplayString(buffer);
 123 #endif /* NDEBUG */
 124
 125 #if 0
 126         /* Set global info */
 127         KdComPortInUse = DefaultPort.Address;
 128 #endif
 129         return TRUE;
 130     }
 131 }
 132
 133 BOOLEAN
 134 NTAPI
 135 KdPortGetByteEx(
 136     IN PCPPORT PortInformation,
 137     OUT PUCHAR ByteReceived)
 138 {
 139     return (CpGetByte(PortInformation, ByteReceived, FALSE, FALSE) == CP_GET_SUCCESS);
 140 }
 141
 142 VOID
 143 NTAPI
 144 KdPortPutByteEx(
 145     IN PCPPORT PortInformation,
 146     IN UCHAR ByteToSend)
 147 {
 148     CpPutByte(PortInformation, ByteToSend);
 149 }
 150
 151 /* EOF */