patch-2.4.19 linux-2.4.19/arch/mips/sibyte/swarm/dbg_io.c

• Lines: 79
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/mips/sibyte/swarm/dbg_io.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/mips/sibyte/swarm/dbg_io.c linux-2.4.19/arch/mips/sibyte/swarm/dbg_io.c
@@ -0,0 +1,78 @@
+/*
+ * 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 void
+duart_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 */
+}
+
+void
+putDebugChar(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 char
+getDebugChar(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);
+}
+