arch: remove tile port

The Tile architecture port was added by Chris Metcalf in 2010, and
maintained until early 2018 when he orphaned it due to his departure
from Mellanox, and nobody else stepped up to maintain it. The product
line is still around in the form of the BlueField SoC, but no longer
uses the Tile architecture.

There are also still products for sale with Tile-GX SoCs, notably the
Mikrotik CCR router family. The products all use old (linux-3.3) kernels
with lots of patches and won't be upgraded by their manufacturers. There
have been efforts to port both OpenWRT and Debian to these, but both
projects have stalled and are very unlikely to be continued in the future.

Given that we are reasonably sure that nobody is still using the port
with an upstream kernel any more, it seems better to remove it now while
the port is in a good shape than to let it bitrot for a few years first.

Cc: Chris Metcalf <chris.d.metcalf@gmail.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: http://www.mellanox.com/page/npu_multicore_overview
Link: https://jenkins.debian.net/view/rebootstrap/job/rebootstrap_tilegx_gcc7/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 111 deletions

diff --git a/arch/tile/include/asm/syscall.h b/arch/tile/include/asm/syscall.h
deleted file mode 100644
index 373d73064ea1..000000000000
--- a/arch/tile/include/asm/syscall.h
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Copyright (C) 2008-2009 Red Hat, Inc.  All rights reserved.
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- *   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, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- *
- * See asm-generic/syscall.h for descriptions of what we must do here.
- */
-
-#ifndef _ASM_TILE_SYSCALL_H
-#define _ASM_TILE_SYSCALL_H
-
-#include <linux/sched.h>
-#include <linux/err.h>
-#include <linux/audit.h>
-#include <linux/compat.h>
-#include <arch/abi.h>
-
-/* The array of function pointers for syscalls. */
-extern void *sys_call_table[];
-#ifdef CONFIG_COMPAT
-extern void *compat_sys_call_table[];
-#endif
-
-/*
- * Only the low 32 bits of orig_r0 are meaningful, so we return int.
- * This importantly ignores the high bits on 64-bit, so comparisons
- * sign-extend the low 32 bits.
- */
-static inline int syscall_get_nr(struct task_struct *t, struct pt_regs *regs)
-{
-	return regs->regs[TREG_SYSCALL_NR];
-}
-
-static inline void syscall_rollback(struct task_struct *task,
-				    struct pt_regs *regs)
-{
-	regs->regs[0] = regs->orig_r0;
-}
-
-static inline long syscall_get_error(struct task_struct *task,
-				     struct pt_regs *regs)
-{
-	unsigned long error = regs->regs[0];
-	return IS_ERR_VALUE(error) ? error : 0;
-}
-
-static inline long syscall_get_return_value(struct task_struct *task,
-					    struct pt_regs *regs)
-{
-	return regs->regs[0];
-}
-
-static inline void syscall_set_return_value(struct task_struct *task,
-					    struct pt_regs *regs,
-					    int error, long val)
-{
-	if (error) {
-		/* R0 is the passed-in negative error, R1 is positive. */
-		regs->regs[0] = error;
-		regs->regs[1] = -error;
-	} else {
-		/* R1 set to zero to indicate no error. */
-		regs->regs[0] = val;
-		regs->regs[1] = 0;
-	}
-}
-
-static inline void syscall_get_arguments(struct task_struct *task,
-					 struct pt_regs *regs,
-					 unsigned int i, unsigned int n,
-					 unsigned long *args)
-{
-	BUG_ON(i + n > 6);
-	memcpy(args, &regs[i], n * sizeof(args[0]));
-}
-
-static inline void syscall_set_arguments(struct task_struct *task,
-					 struct pt_regs *regs,
-					 unsigned int i, unsigned int n,
-					 const unsigned long *args)
-{
-	BUG_ON(i + n > 6);
-	memcpy(&regs[i], args, n * sizeof(args[0]));
-}
-
-/*
- * We don't care about endianness (__AUDIT_ARCH_LE bit) here because
- * tile has the same system calls both on little- and big- endian.
- */
-static inline int syscall_get_arch(void)
-{
-	if (is_compat_task())
-		return AUDIT_ARCH_TILEGX32;
-
-#ifdef CONFIG_TILEGX
-	return AUDIT_ARCH_TILEGX;
-#else
-	return AUDIT_ARCH_TILEPRO;
-#endif
-}
-
-#endif	/* _ASM_TILE_SYSCALL_H */