ntoskrnl/kd/i386/kdbg.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            ntoskrnl/kd/i386/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 #define MAX_COM_PORTS   (sizeof(BaseArray) / sizeof(BaseArray[0]) - 1)
  32
  33 /* STATIC VARIABLES ***********************************************************/
  34
  35 // static CPPORT DefaultPort = {0, 0, 0};
  36
  37 /* The COM port must only be initialized once! */
  38 // static BOOLEAN PortInitialized = FALSE;
  39
  40 /* REACTOS FUNCTIONS **********************************************************/
  41
  42 NTSTATUS
  43 NTAPI
  44 KdDebuggerInitialize1(
  45     IN PLOADER_PARAMETER_BLOCK LoaderBlock OPTIONAL)
  46 {
  47     return STATUS_NOT_IMPLEMENTED;
  48 }
  49
  50 BOOLEAN
  51 NTAPI
  52 KdPortInitializeEx(
  53     IN PCPPORT PortInformation,
  54     IN ULONG ComPortNumber)
  55 {
  56     NTSTATUS Status;
  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
  63     if (!PortInitialized)
  64     {
  65         DefaultPort.BaudRate = PortInformation->BaudRate;
  66
  67         if (ComPortNumber == 0)
  68         {
  69             /*
  70              * Start enumerating COM ports from the last one to the first one,
  71              * and break when we find a valid port.
  72              * If we reach the first element of the list, the invalid COM port,
  73              * then it means that no valid port was found.
  74              */
  75             for (ComPortNumber = MAX_COM_PORTS; ComPortNumber > 0; ComPortNumber--)
  76             {
  77                 if (CpDoesPortExist(UlongToPtr(BaseArray[ComPortNumber])))
  78                 {
  79                     PortInformation->Address = DefaultPort.Address = BaseArray[ComPortNumber];
  80                     break;
  81                 }
  82             }
  83             if (ComPortNumber == 0)
  84             {
  85                 HalDisplayString("\r\nKernel Debugger: No COM port found!\r\n\r\n");
  86                 return FALSE;
  87             }
  88         }
  89
  90         PortInitialized = TRUE;
  91     }
  92 #endif
  93
  94     /*
  95      * Initialize the port
  96      */
  97     Status = CpInitialize(PortInformation,
  98                           (ComPortNumber == 0 ? PortInformation->Address
  99                                               : UlongToPtr(BaseArray[ComPortNumber])),
 100                           (PortInformation->BaudRate == 0 ? DEFAULT_BAUD_RATE
 101                                                           : PortInformation->BaudRate));
 102     if (!NT_SUCCESS(Status))
 103     {
 104         HalDisplayString("\r\nKernel Debugger: Serial port not found!\r\n\r\n");
 105         return FALSE;
 106     }
 107     else
 108     {
 109 #ifndef NDEBUG
 110         CHAR buffer[80];
 111
 112         /* Print message to blue screen */
 113         sprintf(buffer,
 114                 "\r\nKernel Debugger: Serial port found: COM%ld (Port 0x%p) BaudRate %ld\r\n\r\n",
 115                 ComPortNumber,
 116                 PortInformation->Address,
 117                 PortInformation->BaudRate);
 118         HalDisplayString(buffer);
 119 #endif /* NDEBUG */
 120
 121 #if 0
 122         /* Set global info */
 123         KdComPortInUse = DefaultPort.Address;
 124 #endif
 125         return TRUE;
 126     }
 127 }
 128
 129 BOOLEAN
 130 NTAPI
 131 KdPortGetByteEx(
 132     IN PCPPORT PortInformation,
 133     OUT PUCHAR ByteReceived)
 134 {
 135     return (CpGetByte(PortInformation, ByteReceived, FALSE, FALSE) == CP_GET_SUCCESS);
 136 }
 137
 138 VOID
 139 NTAPI
 140 KdPortPutByteEx(
 141     IN PCPPORT PortInformation,
 142     IN UCHAR ByteToSend)
 143 {
 144     CpPutByte(PortInformation, ByteToSend);
 145 }
 146
 147 /* EOF */