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, 65 deletions

diff --git a/arch/tile/include/asm/kexec.h b/arch/tile/include/asm/kexec.h
deleted file mode 100644
index fc98ccfc98ac..000000000000
--- a/arch/tile/include/asm/kexec.h
+++ /dev/null
@@ -1,65 +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.
- *
- * based on kexec.h from other architectures in linux-2.6.18
- */
-
-#ifndef _ASM_TILE_KEXEC_H
-#define _ASM_TILE_KEXEC_H
-
-#include <asm/page.h>
-
-#ifndef __tilegx__
-/* Maximum physical address we can use pages from. */
-#define KEXEC_SOURCE_MEMORY_LIMIT TASK_SIZE
-/* Maximum address we can reach in physical address mode. */
-#define KEXEC_DESTINATION_MEMORY_LIMIT TASK_SIZE
-/* Maximum address we can use for the control code buffer. */
-#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
-#else
-/* We need to limit the memory below PGDIR_SIZE since
- * we only setup page table for [0, PGDIR_SIZE) before final kexec.
- */
-/* Maximum physical address we can use pages from. */
-#define KEXEC_SOURCE_MEMORY_LIMIT PGDIR_SIZE
-/* Maximum address we can reach in physical address mode. */
-#define KEXEC_DESTINATION_MEMORY_LIMIT PGDIR_SIZE
-/* Maximum address we can use for the control code buffer. */
-#define KEXEC_CONTROL_MEMORY_LIMIT PGDIR_SIZE
-#endif
-
-#define KEXEC_CONTROL_PAGE_SIZE	PAGE_SIZE
-
-/*
- * We don't bother to provide a unique identifier, since we can only
- * reboot with a single type of kernel image anyway.
- */
-#define KEXEC_ARCH KEXEC_ARCH_DEFAULT
-
-/* Use the tile override for the page allocator. */
-struct page *kimage_alloc_pages_arch(gfp_t gfp_mask, unsigned int order);
-#define kimage_alloc_pages_arch kimage_alloc_pages_arch
-
-#define MAX_NOTE_BYTES 1024
-
-/* Defined in arch/tile/kernel/relocate_kernel.S */
-extern const unsigned char relocate_new_kernel[];
-extern const unsigned long relocate_new_kernel_size;
-extern void relocate_new_kernel_end(void);
-
-/* Provide a dummy definition to avoid build failures. */
-static inline void crash_setup_regs(struct pt_regs *n, struct pt_regs *o)
-{
-}
-
-#endif /* _ASM_TILE_KEXEC_H */