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, 130 deletions

diff --git a/arch/tile/kernel/sys.c b/arch/tile/kernel/sys.c
deleted file mode 100644
index c7418dcbbb08..000000000000
--- a/arch/tile/kernel/sys.c
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- * 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.
- *
- * This file contains various random system calls that
- * have a non-standard calling sequence on the Linux/TILE
- * platform.
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/syscalls.h>
-#include <linux/mman.h>
-#include <linux/file.h>
-#include <linux/mempolicy.h>
-#include <linux/binfmts.h>
-#include <linux/fs.h>
-#include <linux/compat.h>
-#include <linux/uaccess.h>
-#include <linux/signal.h>
-#include <asm/syscalls.h>
-#include <asm/pgtable.h>
-#include <asm/homecache.h>
-#include <asm/cachectl.h>
-#include <asm/byteorder.h>
-#include <arch/chip.h>
-
-SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len,
-		unsigned long, flags)
-{
-	/* DCACHE is not particularly effective if not bound to one cpu. */
-	if (flags & DCACHE)
-		homecache_evict(cpumask_of(raw_smp_processor_id()));
-
-	if (flags & ICACHE)
-		flush_remote(0, HV_FLUSH_EVICT_L1I, mm_cpumask(current->mm),
-			     0, 0, 0, NULL, NULL, 0);
-	return 0;
-}
-
-/*
- * Syscalls that pass 64-bit values on 32-bit systems normally
- * pass them as (low,high) word packed into the immediately adjacent
- * registers.  If the low word naturally falls on an even register,
- * our ABI makes it work correctly; if not, we adjust it here.
- * Handling it here means we don't have to fix uclibc AND glibc AND
- * any other standard libcs we want to support.
- */
-
-#if !defined(__tilegx__) || defined(CONFIG_COMPAT)
-
-#ifdef __BIG_ENDIAN
-#define SYSCALL_PAIR(name) u32 name ## _hi, u32 name ## _lo
-#else
-#define SYSCALL_PAIR(name) u32 name ## _lo, u32 name ## _hi
-#endif
-
-ssize_t sys32_readahead(int fd, SYSCALL_PAIR(offset), u32 count)
-{
-	return sys_readahead(fd, ((loff_t)offset_hi << 32) | offset_lo, count);
-}
-
-int sys32_fadvise64_64(int fd, SYSCALL_PAIR(offset),
-		       SYSCALL_PAIR(len), int advice)
-{
-	return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo,
-				((loff_t)len_hi << 32) | len_lo, advice);
-}
-
-#endif /* 32-bit syscall wrappers */
-
-/* Note: used by the compat code even in 64-bit Linux. */
-SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
-		unsigned long, prot, unsigned long, flags,
-		unsigned long, fd, unsigned long, off_4k)
-{
-#define PAGE_ADJUST (PAGE_SHIFT - 12)
-	if (off_4k & ((1 << PAGE_ADJUST) - 1))
-		return -EINVAL;
-	return sys_mmap_pgoff(addr, len, prot, flags, fd,
-			      off_4k >> PAGE_ADJUST);
-}
-
-#ifdef __tilegx__
-SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
-		unsigned long, prot, unsigned long, flags,
-		unsigned long, fd, off_t, offset)
-{
-	if (offset & ((1 << PAGE_SHIFT) - 1))
-		return -EINVAL;
-	return sys_mmap_pgoff(addr, len, prot, flags, fd,
-			      offset >> PAGE_SHIFT);
-}
-#endif
-
-
-/* Provide the actual syscall number to call mapping. */
-#undef __SYSCALL
-#define __SYSCALL(nr, call) [nr] = (call),
-
-#ifndef __tilegx__
-/* See comments at the top of the file. */
-#define sys_fadvise64_64 sys32_fadvise64_64
-#define sys_readahead sys32_readahead
-#endif
-
-/* Call the assembly trampolines where necessary. */
-#undef sys_rt_sigreturn
-#define sys_rt_sigreturn _sys_rt_sigreturn
-#define sys_clone _sys_clone
-
-/*
- * Note that we can't include <linux/unistd.h> here since the header
- * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
- */
-void *sys_call_table[__NR_syscalls] = {
-	[0 ... __NR_syscalls-1] = sys_ni_syscall,
-#include <asm/unistd.h>
-};