From: Xavier Bru <xavier.bru@bull.net>

We have been working on using your kgdb ia64 patch provided in Andrew's
tree on a 2.6.7 kernel on Bull Novascale platform (Based on Intel
architecture).  We could use it successfully with minor changes:

.  we added support for UART on I/O ports: (mainly a fix in parameter
  order + the configuration).

.  we fixed a problem that prevented to use interrupts when kgdb is
  called early.


		    Bull kgdb patch for 2.6.7 ia64
		    ------------------------------

Adds support for i/o port interface on IA 64 platforms:

	. add choice for i/o port/iomem support in kernel configuration.

	. fix parameter order for calling outb().

Fixes IRQ not working with KGDB_EARLY

This patch applies on top of:
	kgdb-ga.patch
	kgdboe-netpoll.patch
	kgdb-ia64-support.patch


diff -upN reference/arch/ia64/Kconfig current/arch/ia64/Kconfig
--- reference/arch/ia64/Kconfig
+++ current/arch/ia64/Kconfig
@@ -241,9 +241,25 @@ config KGDB_115200BAUD
 	bool "115200"
 endchoice
 
+choice
+	depends on KGDB
+    	prompt "I/O port address"
+	default KGDB_USE_IOMEM
+
+config KGDB_USE_IOMEM
+	bool "use I/O port IOMEM address"
+	help
+	  Say yes if your system uses IOMEM address for the port (e.g. rx2600).
+
+config KGDB_USE_PORT
+	bool "use I/O port address"
+	help
+	  Say yes if your systems uses I/O ports (e.g. Novascale).
+endchoice
+
 config KGDB_IOMEM
 	hex "hex I/O port IOMEM address"
-	depends on KGDB
+	depends on KGDB_USE_IOMEM
 	default	0xc0000000ff5e0000
 	help
 	  Some systems use IOMEM address for the port.  This value is from
@@ -251,10 +267,20 @@ config KGDB_IOMEM
 
 config KGDB_IOMEM_REG_SHIFT
 	hex "hex I/O port IOMEM reg shift"
-	depends on KGDB
+	depends on KGDB_USE_IOMEM
 	default 0x0
 	help
 	  This is the memory shift for IOMEM.
+
+config KGDB_PORT
+	hex "hex I/O port address"
+	default	0x3f8
+	depends on KGDB
+	depends on KGDB_USE_PORT
+	help
+	  Some systems use I/O port.
+	  On Novascale use 0x3f8 for serial port 1
+	  or 0x2f8 for serial port 2.
 
 config KGDB_IRQ
 	int "IRQ of the debug serial port"
diff -upN reference/arch/ia64/lib/kgdb_serial.c current/arch/ia64/lib/kgdb_serial.c
--- reference/arch/ia64/lib/kgdb_serial.c
+++ current/arch/ia64/lib/kgdb_serial.c
@@ -80,7 +80,8 @@ kgdb_serial_out(struct async_struct *ser
 		writeb(ch, serial->iomem_base + offset);
 		break;
 	default:
-		outb(serial->port + offset, ch);
+	  /* fix parameter order */
+	  outb( ch, serial->port + offset);
 		break;
 	}
 	return;
diff -upN reference/drivers/serial/8250.c current/drivers/serial/8250.c
--- reference/drivers/serial/8250.c
+++ current/drivers/serial/8250.c
@@ -1236,6 +1236,7 @@ static void serial8250_break_ctl(struct 
 
 #ifdef CONFIG_KGDB
 static int kgdb_irq = -1;
+static int kgdb_port = -1;
 #endif
 
 static int serial8250_startup(struct uart_port *port)
@@ -1880,7 +1881,8 @@ static void __init serial8250_register_p
 		struct uart_8250_port *up = &serial8250_ports[i];
 
 #ifdef CONFIG_KGDB
-		if (up->port.irq == kgdb_irq)
+		/* at this point irq could be 0 for the port (KGDB_EARLY) */
+		if (up->port.irq == kgdb_irq || up->port.iobase == kgdb_port)
 			up->port.kgdb = 1;
 #endif
 		up->port.line = i;
@@ -2178,6 +2180,7 @@ void shutdown_for_kgdb(struct async_stru
 	int ttyS;
 
 	kgdb_irq = irq;			/* save for later init */
+	kgdb_port = info->port;
 	for (ttyS = 0; ttyS < UART_NR; ttyS++){
 		up =  &serial8250_ports[ttyS];
 		if (up->port.irq == irq && (irq_lists + irq)->head) {