/* * kgdb debug routines for swarm board. * * Copyright (C) 2001 MontaVista Software Inc. * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net * * This program is free software; you can redistribute  it and/or modify it * under  the terms of  the GNU General  Public License as published by the * Free Software Foundation;  either version 2 of the  License, or (at your * option) any later version. * *//* -------------------- BEGINNING OF CONFIG --------------------- */#include <linux/delay.h>#include <asm/sibyte/sb1250.h>#include <asm/sibyte/sb1250_regs.h>#include <asm/sibyte/sb1250_uart.h>#include <asm/sibyte/sb1250_int.h>#include <asm/sibyte/64bit.h>#include <asm/addrspace.h>/* * We use the second serial port for kgdb traffic. * 	115200, 8, N, 1. */#define	BAUD_RATE		115200#define	CLK_DIVISOR		V_DUART_BAUD_RATE(BAUD_RATE)#define	DATA_BITS		V_DUART_BITS_PER_CHAR_8		/* or 7    */#define	PARITY			V_DUART_PARITY_MODE_NONE	/* or even */#define	STOP_BITS		M_DUART_STOP_BIT_LEN_1		/* or 2    */static int duart_initialized = 0;	/* 0: need to be init'ed by kgdb *//* -------------------- END OF CONFIG --------------------- */#define	duart_out(reg, val)	out64(val, KSEG1 + A_DUART_CHANREG(1,reg))#define duart_in(reg)		in64(KSEG1 + A_DUART_CHANREG(1,reg))extern void set_async_breakpoint(unsigned int epc);void putDebugChar(unsigned char c);unsigned char getDebugChar(void);static voidduart_init(int clk_divisor, int data, int parity, int stop){	duart_out(R_DUART_MODE_REG_1, data | parity);	duart_out(R_DUART_MODE_REG_2, stop);	duart_out(R_DUART_CLK_SEL, clk_divisor);	duart_out(R_DUART_CMD, M_DUART_RX_EN | M_DUART_TX_EN);	/* enable rx and tx */}voidputDebugChar(unsigned char c){	if (!duart_initialized) {		duart_initialized = 1;		duart_init(CLK_DIVISOR, DATA_BITS, PARITY, STOP_BITS);	}	while ((duart_in(R_DUART_STATUS) & M_DUART_TX_RDY) == 0);	duart_out(R_DUART_TX_HOLD, c);}unsigned chargetDebugChar(void){	if (!duart_initialized) {		duart_initialized = 1;		duart_init(CLK_DIVISOR, DATA_BITS, PARITY, STOP_BITS);	}	while ((duart_in(R_DUART_STATUS) & M_DUART_RX_RDY) == 0) ;	return duart_in(R_DUART_RX_HOLD);}