Merge tag 'xtensa-next-20160320' of git://github.com/czankel/xtensa-linux

Pull Xtensa updates from Chris Zankel:
 "Xtensa improvements for 4.6:

   - control whether perf IRQ is treated as NMI from Kconfig
   - implement ioremap for regions outside KIO segment
   - fix ISS serial port behaviour when EOF is reached
   - fix preemption in {clear,copy}_user_highpage
   - fix endianness issues for XTFPGA devices, big-endian cores are now
     fully functional
   - clean up debug infrastructure and add support for hardware
     breakpoints and watchpoints
   - add processor configurations for Three Core HiFi-2 MX and HiFi3
     cpus"

* tag 'xtensa-next-20160320' of git://github.com/czankel/xtensa-linux:
  xtensa: add test_kc705_hifi variant
  xtensa: add Three Core HiFi-2 MX Variant.
  xtensa: support hardware breakpoints/watchpoints
  xtensa: use context structure for debug exceptions
  xtensa: remove remaining non-functional KGDB bits
  xtensa: clear all DBREAKC registers on start
  xtensa: xtfpga: fix earlycon endianness
  xtensa: xtfpga: fix i2c controller register width and endianness
  xtensa: xtfpga: fix ethernet controller endianness
  xtensa: xtfpga: fix serial port register width and endianness
  xtensa: define CONFIG_CPU_{BIG,LITTLE}_ENDIAN
  xtensa: fix preemption in {clear,copy}_user_highpage
  xtensa: ISS: don't hang if stdin EOF is reached
  xtensa: support ioremap for memory outside KIO region
  xtensa: use XTENSA_INT_LEVEL macro in asm/timex.h
  xtensa: make fake NMI configurable

arch/xtensa/platforms/iss/console.c

@@ -96,21 +96,23 @@ static void rs_poll(unsigned long priv)
 {
 	struct tty_port *port = (struct tty_port *)priv;
 	int i = 0;
+	int rd = 1;
 	unsigned char c;
 
 	spin_lock(&timer_lock);
 
 	while (simc_poll(0)) {
-		simc_read(0, &c, 1);
+		rd = simc_read(0, &c, 1);
+		if (rd <= 0)
+			break;
 		tty_insert_flip_char(port, c, TTY_NORMAL);
 		i++;
 	}
 
 	if (i)
 		tty_flip_buffer_push(port);
-
-
-	mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE);
+	if (rd)
+		mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE);
 	spin_unlock(&timer_lock);
 }
 

arch/xtensa/platforms/xtfpga/setup.c

@@ -223,6 +223,7 @@ static struct ethoc_platform_data ethoc_pdata = {
 	 */
 	.hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 },
 	.phy_id = -1,
+	.big_endian = XCHAL_HAVE_BE,
 };
 
 static struct platform_device ethoc_device = {
@@ -283,7 +284,7 @@ static struct plat_serial8250_port serial_platform_data[] = {
 		.irq		= DUART16552_INTNUM,
 		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
 				  UPF_IOREMAP,
-		.iotype		= UPIO_MEM32,
+		.iotype		= XCHAL_HAVE_BE ? UPIO_MEM32BE : UPIO_MEM32,
 		.regshift	= 2,
 		.uartclk	= 0,    /* set in xtavnet_init() */
 	},