1 /*

     2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  

    15 * ne1_tb\specific\monitor.cpp

    16 * Kernel crash debugger - NE1_TBVariant specific

    17 *

    18 */

    19 

    20 

    21 

    22 #include <kernel/monitor.h>

    23 #include "variant.h"

    24 #include "uart/uart16550_ne.h"

    25 

    26 // A copy of TNaviEngine::DoDebugOutput

    27 static TUint DebugPortAddr()

    28 	{

    29 	TUint debugPort;

    30 	switch (Kern::SuperPage().iDebugPort)

    31 		{

    32 		case Arm::EDebugPortJTAG:	debugPort = 0; break; //indicates JTAG debugging

    33 		case 0x101:

    34 		case 1:						debugPort=KHwBaseUart1;	break;

    35 		case 2:						debugPort=KHwBaseUart2;	break;

    36 		default:					debugPort=KHwBaseUart0;	break;

    37 		}

    38 	return debugPort;

    39 	}

    40 

    41 

    42 //

    43 // UART code

    44 //

    45 void CrashDebugger::InitUart()

    46 	{

    47 	// Initialise the UART for standard debug output

    48 	TUint32 baseAddr = DebugPortAddr();

    49 	if (baseAddr) // baseAddr is NULL in case of jtag logging

    50 		{

    51 		TUint32 dp = Kern::SuperPage().iDebugPort;

    52 		TBool highSpeed = (dp==0x100 || dp==0x101);

    53 

    54 		// Baud Rate = 115200; 8 bits, no parity, 1 stop bit

    55 		*((volatile TInt*) (baseAddr+K16550LCROffset))  = 0x83;

    56 		*((volatile TInt*) (baseAddr+K16550BDLoOffset)) = highSpeed ? KBaudRateDiv_230400 : KBaudRateDiv_default;

    57 		*((volatile TInt*) (baseAddr+K16550BDHiOffset)) = 0;

    58 		*((volatile TInt*) (baseAddr+K16550LCROffset))  = 3;

    59 

    60 		// Set the FIFO control register (FCR) to polled mode & don't use interrupts

    61 		*((volatile TInt*) (baseAddr+K16550FCROffset)) = 0;

    62 		*((volatile TInt*) (baseAddr+K16550FCROffset)) = 1;

    63 		*((volatile TInt*) (baseAddr+K16550IEROffset)) = 0;

    64 		}

    65 	}

    66 

    67 void CrashDebugger::UartOut(TUint aChar)

    68 	{

    69 	TUint debugPort = DebugPortAddr();

    70 	volatile TUint32& LSR = *(volatile TUint32*)(debugPort + 0x14);

    71 	volatile TUint32& TXHR = *(volatile TUint32*)(debugPort + 0x00);

    72 	volatile TUint32& RXHR = *(volatile TUint32*)(debugPort + 0x00);

    73 	while (LSR & 1)

    74 		{ 

    75 		if (CheckPower())

    76 			return;

    77 		TUint32 c = RXHR;

    78 		if (c==19)            // XOFF

    79 			{

    80 			FOREVER

    81 				{

    82 				// wait for XON

    83 				while (!(LSR & 1))

    84 					{

    85 					if (CheckPower())

    86 						return;

    87 					}

    88 				c = RXHR;

    89 				if (c==17)    // XON

    90 					break;

    91 				else if (c==3)		// Ctrl C

    92 					Leave(KErrCancel);

    93 				}

    94 			}

    95 		else if (c==3)		// Ctrl C

    96 			Leave(KErrCancel);

    97 		}

    98 	while (!(LSR & 32))

    99 		CheckPower();

   100 	TXHR = aChar;

   101 	}

   102 

   103 TUint8 CrashDebugger::UartIn()

   104 	{

   105 	TUint debugPort = DebugPortAddr();

   106 	volatile TUint32& LSR = *(volatile TUint32*)(debugPort + 0x14);

   107 	volatile TUint32& RXHR = *(volatile TUint32*)(debugPort + 0x00);

   108 	while (!(LSR & 1))

   109 		{

   110 		if (CheckPower())

   111 			return (TUint8)0x0d;

   112 		}

   113 	return (TUint8)RXHR;

   114 	}

   115 

   116 TBool CrashDebugger::CheckPower()

   117 	{

   118 	//

   119 	// TO DO: (mandatory)

   120 	//

   121 	// Check if power supply is stable and return ETrue if not

   122 	//

   123 	return EFalse;	// EXAMPLE ONLY

   124 	}

   125