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, 125 deletions

diff --git a/arch/tile/include/arch/trio_shm.h b/arch/tile/include/arch/trio_shm.h
deleted file mode 100644
index 3382e38245af..000000000000
--- a/arch/tile/include/arch/trio_shm.h
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * Copyright 2012 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.
- */
-
-/* Machine-generated file; do not edit. */
-
-
-#ifndef __ARCH_TRIO_SHM_H__
-#define __ARCH_TRIO_SHM_H__
-
-#include <arch/abi.h>
-#include <arch/trio_shm_def.h>
-
-#ifndef __ASSEMBLER__
-/**
- * TRIO DMA Descriptor.
- * The TRIO DMA descriptor is written by software and consumed by hardware.
- * It is used to specify the location of transaction data in the IO and Tile
- * domains.
- */
-
-__extension__
-typedef union
-{
-  struct
-  {
-    /* Word 0 */
-
-#ifndef __BIG_ENDIAN__
-    /** Tile side virtual address. */
-    int_reg_t va           : 42;
-    /**
-     * Encoded size of buffer used on push DMA when C=1:
-     * 0 = 128 bytes
-     * 1 = 256 bytes
-     * 2 = 512 bytes
-     * 3 = 1024 bytes
-     * 4 = 1664 bytes
-     * 5 = 4096 bytes
-     * 6 = 10368 bytes
-     * 7 = 16384 bytes
-     */
-    uint_reg_t bsz          : 3;
-    /**
-     * Chaining designation.  Always zero for pull DMA
-     * 0 : Unchained buffer pointer
-     * 1 : Chained buffer pointer.  Next buffer descriptor (e.g. VA) stored
-     * in 1st 8-bytes in buffer.  For chained buffers, first 8-bytes of each
-     * buffer contain the next buffer descriptor formatted exactly like a PDE
-     * buffer descriptor.  This allows a chained PDE buffer to be sent using
-     * push DMA.
-     */
-    uint_reg_t c            : 1;
-    /**
-     * Notification interrupt will be delivered when the transaction has
-     * completed (all data has been read from or written to the Tile-side
-     * buffer).
-     */
-    uint_reg_t notif        : 1;
-    /**
-     * When 0, the XSIZE field specifies the total byte count for the
-     * transaction.  When 1, the XSIZE field is encoded as 2^(N+14) for N in
-     * {0..6}:
-     * 0 = 16KB
-     * 1 = 32KB
-     * 2 = 64KB
-     * 3 = 128KB
-     * 4 = 256KB
-     * 5 = 512KB
-     * 6 = 1MB
-     * All other encodings of the XSIZE field are reserved when SMOD=1
-     */
-    uint_reg_t smod         : 1;
-    /**
-     * Total number of bytes to move for this transaction.   When SMOD=1,
-     * this field is encoded - see SMOD description.
-     */
-    uint_reg_t xsize        : 14;
-    /** Reserved. */
-    uint_reg_t __reserved_0 : 1;
-    /**
-     * Generation number.  Used to indicate a valid descriptor in ring.  When
-     * a new descriptor is written into the ring, software must toggle this
-     * bit.  The net effect is that the GEN bit being written into new
-     * descriptors toggles each time the ring tail pointer wraps.
-     */
-    uint_reg_t gen          : 1;
-#else   /* __BIG_ENDIAN__ */
-    uint_reg_t gen          : 1;
-    uint_reg_t __reserved_0 : 1;
-    uint_reg_t xsize        : 14;
-    uint_reg_t smod         : 1;
-    uint_reg_t notif        : 1;
-    uint_reg_t c            : 1;
-    uint_reg_t bsz          : 3;
-    int_reg_t va           : 42;
-#endif
-
-    /* Word 1 */
-
-#ifndef __BIG_ENDIAN__
-    /** IO-side address */
-    uint_reg_t io_address : 64;
-#else   /* __BIG_ENDIAN__ */
-    uint_reg_t io_address : 64;
-#endif
-
-  };
-
-  /** Word access */
-  uint_reg_t words[2];
-} TRIO_DMA_DESC_t;
-#endif /* !defined(__ASSEMBLER__) */
-
-#endif /* !defined(__ARCH_TRIO_SHM_H__) */