Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

1 files changed, 0 insertions, 303 deletions

diff --git a/arch/mn10300/kernel/gdb-io-ttysm.c b/arch/mn10300/kernel/gdb-io-ttysm.c
deleted file mode 100644
index caae8cac9db10..0000000000000
--- a/arch/mn10300/kernel/gdb-io-ttysm.c
+++ /dev/null
@@ -1,303 +0,0 @@
-/* MN10300 On-chip serial driver for gdbstub I/O
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/tty.h>
-#include <asm/pgtable.h>
-#include <asm/gdb-stub.h>
-#include <asm/exceptions.h>
-#include <unit/clock.h>
-#include "mn10300-serial.h"
-
-#if defined(CONFIG_GDBSTUB_ON_TTYSM0)
-struct mn10300_serial_port *const gdbstub_port = &mn10300_serial_port_sif0;
-#elif defined(CONFIG_GDBSTUB_ON_TTYSM1)
-struct mn10300_serial_port *const gdbstub_port = &mn10300_serial_port_sif1;
-#else
-struct mn10300_serial_port *const gdbstub_port = &mn10300_serial_port_sif2;
-#endif
-
-
-/*
- * initialise the GDB stub I/O routines
- */
-void __init gdbstub_io_init(void)
-{
-	uint16_t scxctr;
-	int tmp;
-
-	switch (gdbstub_port->clock_src) {
-	case MNSCx_CLOCK_SRC_IOCLK:
-		gdbstub_port->ioclk = MN10300_IOCLK;
-		break;
-
-#ifdef MN10300_IOBCLK
-	case MNSCx_CLOCK_SRC_IOBCLK:
-		gdbstub_port->ioclk = MN10300_IOBCLK;
-		break;
-#endif
-	default:
-		BUG();
-	}
-
-	/* set up the serial port */
-	gdbstub_io_set_baud(115200);
-
-	/* we want to get serial receive interrupts */
-	set_intr_level(gdbstub_port->rx_irq,
-		NUM2GxICR_LEVEL(CONFIG_DEBUGGER_IRQ_LEVEL));
-	set_intr_level(gdbstub_port->tx_irq,
-		NUM2GxICR_LEVEL(CONFIG_DEBUGGER_IRQ_LEVEL));
-	set_intr_stub(NUM2EXCEP_IRQ_LEVEL(CONFIG_DEBUGGER_IRQ_LEVEL),
-		gdbstub_io_rx_handler);
-
-	*gdbstub_port->rx_icr |= GxICR_ENABLE;
-	tmp = *gdbstub_port->rx_icr;
-
-	/* enable the device */
-	scxctr = SC01CTR_CLN_8BIT;	/* 1N8 */
-	switch (gdbstub_port->div_timer) {
-	case MNSCx_DIV_TIMER_16BIT:
-		scxctr |= SC0CTR_CK_TM8UFLOW_8; /* == SC1CTR_CK_TM9UFLOW_8
-						   == SC2CTR_CK_TM10UFLOW_8 */
-		break;
-
-	case MNSCx_DIV_TIMER_8BIT:
-		scxctr |= SC0CTR_CK_TM2UFLOW_8;
-		break;
-	}
-
-	scxctr |= SC01CTR_TXE | SC01CTR_RXE;
-
-	*gdbstub_port->_control = scxctr;
-	tmp = *gdbstub_port->_control;
-
-	/* permit level 0 IRQs only */
-	arch_local_change_intr_mask_level(
-		NUM2EPSW_IM(CONFIG_DEBUGGER_IRQ_LEVEL + 1));
-}
-
-/*
- * set up the GDB stub serial port baud rate timers
- */
-void gdbstub_io_set_baud(unsigned baud)
-{
-	const unsigned bits = 10; /* 1 [start] + 8 [data] + 0 [parity] +
-				   * 1 [stop] */
-	unsigned long ioclk = gdbstub_port->ioclk;
-	unsigned xdiv, tmp;
-	uint16_t tmxbr;
-	uint8_t tmxmd;
-
-	if (!baud) {
-		baud = 9600;
-	} else if (baud == 134) {
-		baud = 269;	/* 134 is really 134.5 */
-		xdiv = 2;
-	}
-
-try_alternative:
-	xdiv = 1;
-
-	switch (gdbstub_port->div_timer) {
-	case MNSCx_DIV_TIMER_16BIT:
-		tmxmd = TM8MD_SRC_IOCLK;
-		tmxbr = tmp = (ioclk / (baud * xdiv) + 4) / 8 - 1;
-		if (tmp > 0 && tmp <= 65535)
-			goto timer_okay;
-
-		tmxmd = TM8MD_SRC_IOCLK_8;
-		tmxbr = tmp = (ioclk / (baud * 8 * xdiv) + 4) / 8 - 1;
-		if (tmp > 0 && tmp <= 65535)
-			goto timer_okay;
-
-		tmxmd = TM8MD_SRC_IOCLK_32;
-		tmxbr = tmp = (ioclk / (baud * 32 * xdiv) + 4) / 8 - 1;
-		if (tmp > 0 && tmp <= 65535)
-			goto timer_okay;
-
-		break;
-
-	case MNSCx_DIV_TIMER_8BIT:
-		tmxmd = TM2MD_SRC_IOCLK;
-		tmxbr = tmp = (ioclk / (baud * xdiv) + 4) / 8 - 1;
-		if (tmp > 0 && tmp <= 255)
-			goto timer_okay;
-
-		tmxmd = TM2MD_SRC_IOCLK_8;
-		tmxbr = tmp = (ioclk / (baud * 8 * xdiv) + 4) / 8 - 1;
-		if (tmp > 0 && tmp <= 255)
-			goto timer_okay;
-
-		tmxmd = TM2MD_SRC_IOCLK_32;
-		tmxbr = tmp = (ioclk / (baud * 32 * xdiv) + 4) / 8 - 1;
-		if (tmp > 0 && tmp <= 255)
-			goto timer_okay;
-		break;
-	}
-
-	/* as a last resort, if the quotient is zero, default to 9600 bps */
-	baud = 9600;
-	goto try_alternative;
-
-timer_okay:
-	gdbstub_port->uart.timeout = (2 * bits * HZ) / baud;
-	gdbstub_port->uart.timeout += HZ / 50;
-
-	/* set the timer to produce the required baud rate */
-	switch (gdbstub_port->div_timer) {
-	case MNSCx_DIV_TIMER_16BIT:
-		*gdbstub_port->_tmxmd = 0;
-		*gdbstub_port->_tmxbr = tmxbr;
-		*gdbstub_port->_tmxmd = TM8MD_INIT_COUNTER;
-		*gdbstub_port->_tmxmd = tmxmd | TM8MD_COUNT_ENABLE;
-		break;
-
-	case MNSCx_DIV_TIMER_8BIT:
-		*gdbstub_port->_tmxmd = 0;
-		*(volatile u8 *) gdbstub_port->_tmxbr = (u8)tmxbr;
-		*gdbstub_port->_tmxmd = TM2MD_INIT_COUNTER;
-		*gdbstub_port->_tmxmd = tmxmd | TM2MD_COUNT_ENABLE;
-		break;
-	}
-}
-
-/*
- * wait for a character to come from the debugger
- */
-int gdbstub_io_rx_char(unsigned char *_ch, int nonblock)
-{
-	unsigned ix;
-	u8 ch, st;
-#if defined(CONFIG_MN10300_WD_TIMER)
-	int cpu;
-#endif
-
-	*_ch = 0xff;
-
-	if (gdbstub_rx_unget) {
-		*_ch = gdbstub_rx_unget;
-		gdbstub_rx_unget = 0;
-		return 0;
-	}
-
-try_again:
-	/* pull chars out of the buffer */
-	ix = gdbstub_rx_outp;
-	barrier();
-	if (ix == gdbstub_rx_inp) {
-		if (nonblock)
-			return -EAGAIN;
-#ifdef CONFIG_MN10300_WD_TIMER
-	for (cpu = 0; cpu < NR_CPUS; cpu++)
-		watchdog_alert_counter[cpu] = 0;
-#endif
-		goto try_again;
-	}
-
-	ch = gdbstub_rx_buffer[ix++];
-	st = gdbstub_rx_buffer[ix++];
-	barrier();
-	gdbstub_rx_outp = ix & (PAGE_SIZE - 1);
-
-	st &= SC01STR_RXF | SC01STR_RBF | SC01STR_FEF | SC01STR_PEF |
-		SC01STR_OEF;
-
-	/* deal with what we've got
-	 * - note that the UART doesn't do BREAK-detection for us
-	 */
-	if (st & SC01STR_FEF && ch == 0) {
-		switch (gdbstub_port->rx_brk) {
-		case 0:	gdbstub_port->rx_brk = 1;	goto try_again;
-		case 1:	gdbstub_port->rx_brk = 2;	goto try_again;
-		case 2:
-			gdbstub_port->rx_brk = 3;
-			gdbstub_proto("### GDB MNSERIAL Rx Break Detected"
-				      " ###\n");
-			return -EINTR;
-		default:
-			goto try_again;
-		}
-	} else if (st & SC01STR_FEF) {
-		if (gdbstub_port->rx_brk)
-			goto try_again;
-
-		gdbstub_proto("### GDB MNSERIAL Framing Error ###\n");
-		return -EIO;
-	} else if (st & SC01STR_OEF) {
-		if (gdbstub_port->rx_brk)
-			goto try_again;
-
-		gdbstub_proto("### GDB MNSERIAL Overrun Error ###\n");
-		return -EIO;
-	} else if (st & SC01STR_PEF) {
-		if (gdbstub_port->rx_brk)
-			goto try_again;
-
-		gdbstub_proto("### GDB MNSERIAL Parity Error ###\n");
-		return -EIO;
-	} else {
-		/* look for the tail-end char on a break run */
-		if (gdbstub_port->rx_brk == 3) {
-			switch (ch) {
-			case 0xFF:
-			case 0xFE:
-			case 0xFC:
-			case 0xF8:
-			case 0xF0:
-			case 0xE0:
-			case 0xC0:
-			case 0x80:
-			case 0x00:
-				gdbstub_port->rx_brk = 0;
-				goto try_again;
-			default:
-				break;
-			}
-		}
-
-		gdbstub_port->rx_brk = 0;
-		gdbstub_io("### GDB Rx %02x (st=%02x) ###\n", ch, st);
-		*_ch = ch & 0x7f;
-		return 0;
-	}
-}
-
-/*
- * send a character to the debugger
- */
-void gdbstub_io_tx_char(unsigned char ch)
-{
-	while (*gdbstub_port->_status & SC01STR_TBF)
-		continue;
-
-	if (ch == 0x0a) {
-		*(u8 *) gdbstub_port->_txb = 0x0d;
-		while (*gdbstub_port->_status & SC01STR_TBF)
-			continue;
-	}
-
-	*(u8 *) gdbstub_port->_txb = ch;
-}
-
-/*
- * flush the transmission buffers
- */
-void gdbstub_io_tx_flush(void)
-{
-	while (*gdbstub_port->_status & (SC01STR_TBF | SC01STR_TXF))
-		continue;
-}