patch-2.4.10 linux/arch/mips/ddb5xxx/ddb5477/kgdb_io.c

• Lines: 143
• Date: Sun Sep 9 10:43:01 2001
• Orig file: v2.4.9/linux/arch/mips/ddb5xxx/ddb5477/kgdb_io.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/arch/mips/ddb5xxx/ddb5477/kgdb_io.c linux/arch/mips/ddb5xxx/ddb5477/kgdb_io.c
@@ -0,0 +1,142 @@
+
+#include <linux/config.h>
+
+#if (defined(CONFIG_DDB5477) && defined(CONFIG_REMOTE_DEBUG))
+
+/* --- CONFIG --- */
+
+/* we need uint32 uint8 */
+/* #include "types.h" */
+typedef unsigned char uint8;
+typedef unsigned int uint32;
+
+/* --- END OF CONFIG --- */
+
+#define         UART16550_BAUD_2400             2400
+#define         UART16550_BAUD_4800             4800
+#define         UART16550_BAUD_9600             9600
+#define         UART16550_BAUD_19200            19200
+#define         UART16550_BAUD_38400            38400
+#define         UART16550_BAUD_57600            57600
+#define         UART16550_BAUD_115200           115200
+
+#define         UART16550_PARITY_NONE           0
+#define         UART16550_PARITY_ODD            0x08
+#define         UART16550_PARITY_EVEN           0x18
+#define         UART16550_PARITY_MARK           0x28
+#define         UART16550_PARITY_SPACE          0x38
+
+#define         UART16550_DATA_5BIT             0x0
+#define         UART16550_DATA_6BIT             0x1
+#define         UART16550_DATA_7BIT             0x2
+#define         UART16550_DATA_8BIT             0x3
+
+#define         UART16550_STOP_1BIT             0x0
+#define         UART16550_STOP_2BIT             0x4
+
+/* ----------------------------------------------------- */
+
+/* === CONFIG === */
+
+/* [jsun] we use the second serial port for kdb */
+#define         BASE                    0xbfa04240
+#define         MAX_BAUD                115200
+#define		REG_OFFSET		8
+
+/* === END OF CONFIG === */
+
+/* register offset */
+#define         OFS_RCV_BUFFER          (0*REG_OFFSET)
+#define         OFS_TRANS_HOLD          (0*REG_OFFSET)
+#define         OFS_SEND_BUFFER         (0*REG_OFFSET)
+#define         OFS_INTR_ENABLE         (1*REG_OFFSET)
+#define         OFS_INTR_ID             (2*REG_OFFSET)
+#define         OFS_DATA_FORMAT         (3*REG_OFFSET)
+#define         OFS_LINE_CONTROL        (3*REG_OFFSET)
+#define         OFS_MODEM_CONTROL       (4*REG_OFFSET)
+#define         OFS_RS232_OUTPUT        (4*REG_OFFSET)
+#define         OFS_LINE_STATUS         (5*REG_OFFSET)
+#define         OFS_MODEM_STATUS        (6*REG_OFFSET)
+#define         OFS_RS232_INPUT         (6*REG_OFFSET)
+#define         OFS_SCRATCH_PAD         (7*REG_OFFSET)
+
+#define         OFS_DIVISOR_LSB         (0*REG_OFFSET)
+#define         OFS_DIVISOR_MSB         (1*REG_OFFSET)
+
+
+/* memory-mapped read/write of the port */
+#define         UART16550_READ(y)    (*((volatile uint8*)(BASE + y)))
+#define         UART16550_WRITE(y, z)  ((*((volatile uint8*)(BASE + y))) = z)
+
+void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
+{
+	/* disable interrupts */
+	UART16550_WRITE(OFS_INTR_ENABLE, 0);
+
+	/* set up buad rate */
+	{
+		uint32 divisor;
+
+		/* set DIAB bit */
+		UART16550_WRITE(OFS_LINE_CONTROL, 0x80);
+
+		/* set divisor */
+		divisor = MAX_BAUD / baud;
+		UART16550_WRITE(OFS_DIVISOR_LSB, divisor & 0xff);
+		UART16550_WRITE(OFS_DIVISOR_MSB, (divisor & 0xff00) >> 8);
+
+		/* clear DIAB bit */
+		UART16550_WRITE(OFS_LINE_CONTROL, 0x0);
+	}
+
+	/* set data format */
+	UART16550_WRITE(OFS_DATA_FORMAT, data | parity | stop);
+}
+
+static int remoteDebugInitialized = 0;
+
+int debug_state = -1;
+
+uint8 getDebugChar(void)
+{
+	uint8 c;
+	if (!remoteDebugInitialized) {
+		remoteDebugInitialized = 1;
+		debugInit(UART16550_BAUD_38400,
+			  UART16550_DATA_8BIT,
+			  UART16550_PARITY_NONE, UART16550_STOP_1BIT);
+	}
+
+	while ((UART16550_READ(OFS_LINE_STATUS) & 0x1) == 0);
+	c= UART16550_READ(OFS_RCV_BUFFER);
+/*
+	if (state != 1) {
+		state = 1;
+		debug_out("\ngetDebugChar: ", 15);
+	}
+	debug_out(&c, 1);
+*/
+	return c;
+}
+
+
+int putDebugChar(uint8 byte)
+{
+	if (!remoteDebugInitialized) {
+		remoteDebugInitialized = 1;
+		debugInit(UART16550_BAUD_9600,
+			  UART16550_DATA_8BIT,
+			  UART16550_PARITY_NONE, UART16550_STOP_1BIT);
+	}
+
+	while ((UART16550_READ(OFS_LINE_STATUS) & 0x20) == 0);
+	UART16550_WRITE(OFS_SEND_BUFFER, byte);
+	if (debug_state != 2) {
+		debug_state = 2;
+		// debug_out("\nputDebugChar: ", 15);
+	}
+	// debug_out(&byte, 1);
+	return 1;
+}
+
+#endif