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, 101 deletions

diff --git a/arch/tile/include/uapi/arch/abi.h b/arch/tile/include/uapi/arch/abi.h
deleted file mode 100644
index df161a4..0000000
--- a/arch/tile/include/uapi/arch/abi.h
+++ /dev/null
@@ -1,101 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * 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.
- */
-
-/**
- * @file
- *
- * ABI-related register definitions.
- */
-
-#ifndef __ARCH_ABI_H__
-
-#ifndef __tile__   /* support uncommon use of arch headers in non-tile builds */
-# include <arch/chip.h>
-# define __INT_REG_BITS CHIP_WORD_SIZE()
-#endif
-
-#include <arch/intreg.h>
-
-/* __need_int_reg_t is deprecated: just include <arch/intreg.h> */
-#ifndef __need_int_reg_t
-
-#define __ARCH_ABI_H__
-
-#ifndef __ASSEMBLER__
-/** Unsigned type that can hold a register. */
-typedef __uint_reg_t uint_reg_t;
-
-/** Signed type that can hold a register. */
-typedef __int_reg_t int_reg_t;
-#endif
-
-/** String prefix to use for printf(). */
-#define INT_REG_FMT __INT_REG_FMT
-
-/** Number of bits in a register. */
-#define INT_REG_BITS __INT_REG_BITS
-
-
-/* Registers 0 - 55 are "normal", but some perform special roles. */
-
-#define TREG_FP       52   /**< Frame pointer. */
-#define TREG_TP       53   /**< Thread pointer. */
-#define TREG_SP       54   /**< Stack pointer. */
-#define TREG_LR       55   /**< Link to calling function PC. */
-
-/** Index of last normal general-purpose register. */
-#define TREG_LAST_GPR 55
-
-/* Registers 56 - 62 are "special" network registers. */
-
-#define TREG_SN       56   /**< Static network access. */
-#define TREG_IDN0     57   /**< IDN demux 0 access. */
-#define TREG_IDN1     58   /**< IDN demux 1 access. */
-#define TREG_UDN0     59   /**< UDN demux 0 access. */
-#define TREG_UDN1     60   /**< UDN demux 1 access. */
-#define TREG_UDN2     61   /**< UDN demux 2 access. */
-#define TREG_UDN3     62   /**< UDN demux 3 access. */
-
-/* Register 63 is the "special" zero register. */
-
-#define TREG_ZERO     63   /**< "Zero" register; always reads as "0". */
-
-
-/** By convention, this register is used to hold the syscall number. */
-#define TREG_SYSCALL_NR      10
-
-/** Name of register that holds the syscall number, for use in assembly. */
-#define TREG_SYSCALL_NR_NAME r10
-
-
-/**
- * The ABI requires callers to allocate a caller state save area of
- * this many bytes at the bottom of each stack frame.
- */
-#define C_ABI_SAVE_AREA_SIZE (2 * (INT_REG_BITS / 8))
-
-/**
- * The operand to an 'info' opcode directing the backtracer to not
- * try to find the calling frame.
- */
-#define INFO_OP_CANNOT_BACKTRACE 2
-
-
-#endif /* !__need_int_reg_t */
-
-/* Make sure we later can get all the definitions and declarations.  */
-#undef __need_int_reg_t
-
-#endif /* !__ARCH_ABI_H__ */