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/*
* linux/arch/mips/philips/nino/kgdb.c
*
* Copyright (C) 2001 Steven Hill (sjhill@realitydiluted.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Low level functions for remote debugging on PR31700.
*/
#include <asm/system.h>
#include <asm/philips/pr31700.h>
static int remoteDebugInitialized = 0;
void debugInit(void)
{
/*
* If low-level debugging (before GDB or console operational) is
* configured, then we do not need to re-initialize the UART.
*/
#ifndef CONFIG_DEBUG_LL
earlyInitUartPR31700();
#endif
}
char getDebugChar(void)
{
char buf;
unsigned long int2, flags;
if (!remoteDebugInitialized) {
debugInit();
remoteDebugInitialized = 1;
}
save_and_cli(flags);
int2 = IntEnable2;
IntEnable2 = 0;
while(!(UartA_Ctrl1 & UART_RX_HOLD_FULL));
buf = UartA_Data;
IntEnable2 = int2;
restore_flags(flags);
return buf;
}
int putDebugChar(char c)
{
int i;
unsigned long int2;
if (!remoteDebugInitialized) {
debugInit();
remoteDebugInitialized = 1;
}
int2 = IntEnable2;
IntEnable2 &=
~(INT2_UARTATXINT | INT2_UARTATXOVERRUN | INT2_UARTAEMPTY);
for (i = 0; !(IntStatus2 & INT2_UARTATXINT) && (i < 10000); i++);
IntClear2 = INT2_UARTATXINT | INT2_UARTATXOVERRUN | INT2_UARTAEMPTY;
UartA_Data = c;
for (i = 0; !(IntStatus2 & INT2_UARTATXINT) && (i < 10000); i++);
IntClear2 = INT2_UARTATXINT | INT2_UARTATXOVERRUN | INT2_UARTAEMPTY;
IntEnable2 = int2;
return 1;
}
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