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>

6 files changed, 0 insertions, 490 deletions

diff --git a/arch/tile/kernel/vdso/Makefile b/arch/tile/kernel/vdso/Makefile
deleted file mode 100644
index b596a7396382..000000000000
--- a/arch/tile/kernel/vdso/Makefile
+++ /dev/null
@@ -1,117 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-# Symbols present in the vdso
-vdso-syms = rt_sigreturn gettimeofday
-
-# Files to link into the vdso
-obj-vdso = $(patsubst %, v%.o, $(vdso-syms))
-
-# Build rules
-targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds vdso-dummy.o
-obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
-
-# vdso32 is only for tilegx -m32 compat task.
-VDSO32-$(CONFIG_COMPAT) := y
-
-obj-y += vdso.o vdso-syms.o
-obj-$(VDSO32-y) += vdso32.o
-CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
-
-# vDSO code runs in userspace and -pg doesn't help with profiling anyway.
-CFLAGS_REMOVE_vdso.o = -pg
-CFLAGS_REMOVE_vdso32.o = -pg
-CFLAGS_REMOVE_vrt_sigreturn.o = -pg
-CFLAGS_REMOVE_vrt_sigreturn32.o = -pg
-CFLAGS_REMOVE_vgettimeofday.o = -pg
-CFLAGS_REMOVE_vgettimeofday32.o = -pg
-
-ifdef CONFIG_FEEDBACK_COLLECT
-# vDSO code runs in userspace, not collecting feedback data.
-CFLAGS_REMOVE_vdso.o = -ffeedback-generate
-CFLAGS_REMOVE_vdso32.o = -ffeedback-generate
-CFLAGS_REMOVE_vrt_sigreturn.o = -ffeedback-generate
-CFLAGS_REMOVE_vrt_sigreturn32.o = -ffeedback-generate
-CFLAGS_REMOVE_vgettimeofday.o = -ffeedback-generate
-CFLAGS_REMOVE_vgettimeofday32.o = -ffeedback-generate
-endif
-
-# Disable gcov profiling for VDSO code
-GCOV_PROFILE := n
-
-# Force dependency
-$(obj)/vdso.o: $(obj)/vdso.so
-
-# link rule for the .so file, .lds has to be first
-SYSCFLAGS_vdso.so.dbg = $(c_flags)
-$(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso) FORCE
-	$(call if_changed,vdsold)
-
-# We also create a special relocatable object that should mirror the symbol
-# table and layout of the linked DSO.  With ld -R we can then refer to
-# these symbols in the kernel code rather than hand-coded addresses.
-
-SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \
-                            $(call cc-ldoption, -Wl$(comma)--hash-style=both)
-SYSCFLAGS_vdso_dummy.o = -r
-$(obj)/vdso-dummy.o: $(src)/vdso.lds $(obj)/vrt_sigreturn.o FORCE
-	$(call if_changed,vdsold)
-
-LDFLAGS_vdso-syms.o := -r -R
-$(obj)/vdso-syms.o: $(obj)/vdso-dummy.o FORCE
-	$(call if_changed,ld)
-
-# strip rule for the .so file
-$(obj)/%.so: OBJCOPYFLAGS := -S
-$(obj)/%.so: $(obj)/%.so.dbg FORCE
-	$(call if_changed,objcopy)
-
-# actual build commands
-# The DSO images are built using a special linker script
-# Add -lgcc so tilepro gets static muldi3 and lshrdi3 definitions.
-# Make sure only to export the intended __vdso_xxx symbol offsets.
-quiet_cmd_vdsold = VDSOLD  $@
-      cmd_vdsold = $(CC) $(KCFLAGS) -nostdlib $(SYSCFLAGS_$(@F)) \
-                           -Wl,-T,$(filter-out FORCE,$^) -o $@.tmp -lgcc && \
-                   $(CROSS_COMPILE)objcopy \
-                           $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@
-
-# install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL $@
-      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
-
-vdso.so: $(obj)/vdso.so.dbg
-	@mkdir -p $(MODLIB)/vdso
-	$(call cmd,vdso_install)
-
-vdso32.so: $(obj)/vdso32.so.dbg
-	$(call cmd,vdso_install)
-
-vdso_install: vdso.so
-vdso32_install: vdso32.so
-
-
-KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS))
-KBUILD_AFLAGS_32 += -m32 -s
-KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
-KBUILD_CFLAGS_32 += -m32 -fPIC -shared
-
-obj-vdso32 = $(patsubst %, v%32.o, $(vdso-syms))
-
-targets += $(obj-vdso32) vdso32.so vdso32.so.dbg
-obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
-
-$(obj-vdso32:%=%): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
-$(obj-vdso32:%=%): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
-
-$(obj)/vgettimeofday32.o: $(obj)/vgettimeofday.c FORCE
-	$(call if_changed_rule,cc_o_c)
-
-$(obj)/vrt_sigreturn32.o: $(obj)/vrt_sigreturn.S FORCE
-	$(call if_changed,as_o_S)
-
-# Force dependency
-$(obj)/vdso32.o: $(obj)/vdso32.so
-
-SYSCFLAGS_vdso32.so.dbg = -m32 -shared -s -Wl,-soname=linux-vdso32.so.1 \
-			    $(call cc-ldoption, -Wl$(comma)--hash-style=both)
-$(obj)/vdso32.so.dbg: $(src)/vdso.lds $(obj-vdso32) FORCE
-	$(call if_changed,vdsold)
diff --git a/arch/tile/kernel/vdso/vdso.S b/arch/tile/kernel/vdso/vdso.S
deleted file mode 100644
index 3467adb41630..000000000000
--- a/arch/tile/kernel/vdso/vdso.S
+++ /dev/null
@@ -1,28 +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.
- */
-
-#include <linux/init.h>
-#include <linux/linkage.h>
-#include <asm/page.h>
-
-	__PAGE_ALIGNED_DATA
-
-	.global vdso_start, vdso_end
-	.align PAGE_SIZE
-vdso_start:
-	.incbin "arch/tile/kernel/vdso/vdso.so"
-	.align PAGE_SIZE
-vdso_end:
-
-	.previous
diff --git a/arch/tile/kernel/vdso/vdso.lds.S b/arch/tile/kernel/vdso/vdso.lds.S
deleted file mode 100644
index 731529f3f06f..000000000000
--- a/arch/tile/kernel/vdso/vdso.lds.S
+++ /dev/null
@@ -1,89 +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.
- */
-
-#define VDSO_VERSION_STRING	LINUX_2.6
-
-
-OUTPUT_ARCH(tile)
-
-/* The ELF entry point can be used to set the AT_SYSINFO value. */
-ENTRY(__vdso_rt_sigreturn);
-
-
-SECTIONS
-{
-	. = SIZEOF_HEADERS;
-
-	.hash		: { *(.hash) }			:text
-	.gnu.hash	: { *(.gnu.hash) }
-	.dynsym		: { *(.dynsym) }
-	.dynstr		: { *(.dynstr) }
-	.gnu.version	: { *(.gnu.version) }
-	.gnu.version_d	: { *(.gnu.version_d) }
-	.gnu.version_r	: { *(.gnu.version_r) }
-
-	.note		: { *(.note.*) }		:text	:note
-	.dynamic	: { *(.dynamic) }		:text	:dynamic
-
-	.eh_frame_hdr	: { *(.eh_frame_hdr) }		:text	:eh_frame_hdr
-	.eh_frame	: { KEEP (*(.eh_frame)) }	:text
-
-	.rodata	 : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
-
-	/*
-	 * This linker script is used both with -r and with -shared.
-	 * For the layouts to match, we need to skip more than enough
-	 * space for the dynamic symbol table et al. If this amount
-	 * is insufficient, ld -shared will barf. Just increase it here.
-	 */
-	. = 0x1000;
-	.text		: { *(.text .text.*) }		:text
-
-	.data		: {
-		*(.got.plt) *(.got)
-		*(.data .data.* .gnu.linkonce.d.*)
-		*(.dynbss)
-		*(.bss .bss.* .gnu.linkonce.b.*)
-	}
-}
-
-
-/*
- * We must supply the ELF program headers explicitly to get just one
- * PT_LOAD segment, and set the flags explicitly to make segments read-only.
- */
-PHDRS
-{
-	text		PT_LOAD		FLAGS(5) FILEHDR PHDRS;	/* PF_R|PF_X */
-	dynamic		PT_DYNAMIC	FLAGS(4);		/* PF_R */
-	note		PT_NOTE		FLAGS(4);		/* PF_R */
-	eh_frame_hdr	PT_GNU_EH_FRAME;
-}
-
-
-/*
- * This controls what userland symbols we export from the vDSO.
- */
-VERSION
-{
-	VDSO_VERSION_STRING {
-	global:
-		__vdso_rt_sigreturn;
-		__vdso_gettimeofday;
-		gettimeofday;
-		__vdso_clock_gettime;
-		clock_gettime;
-	local:*;
-	};
-}
diff --git a/arch/tile/kernel/vdso/vdso32.S b/arch/tile/kernel/vdso/vdso32.S
deleted file mode 100644
index 1d1ac3257e11..000000000000
--- a/arch/tile/kernel/vdso/vdso32.S
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright 2013 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.
- */
-
-#include <linux/init.h>
-#include <linux/linkage.h>
-#include <asm/page.h>
-
-	__PAGE_ALIGNED_DATA
-
-	.global vdso32_start, vdso32_end
-	.align PAGE_SIZE
-vdso32_start:
-	.incbin "arch/tile/kernel/vdso/vdso32.so"
-	.align PAGE_SIZE
-vdso32_end:
-
-	.previous
diff --git a/arch/tile/kernel/vdso/vgettimeofday.c b/arch/tile/kernel/vdso/vgettimeofday.c
deleted file mode 100644
index e63310c49742..000000000000
--- a/arch/tile/kernel/vdso/vgettimeofday.c
+++ /dev/null
@@ -1,198 +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.
- */
-
-#define VDSO_BUILD  /* avoid some shift warnings for -m32 in <asm/page.h> */
-#include <linux/time.h>
-#include <asm/timex.h>
-#include <asm/unistd.h>
-#include <asm/vdso.h>
-
-#if CHIP_HAS_SPLIT_CYCLE()
-static inline cycles_t get_cycles_inline(void)
-{
-	unsigned int high = __insn_mfspr(SPR_CYCLE_HIGH);
-	unsigned int low = __insn_mfspr(SPR_CYCLE_LOW);
-	unsigned int high2 = __insn_mfspr(SPR_CYCLE_HIGH);
-
-	while (unlikely(high != high2)) {
-		low = __insn_mfspr(SPR_CYCLE_LOW);
-		high = high2;
-		high2 = __insn_mfspr(SPR_CYCLE_HIGH);
-	}
-
-	return (((cycles_t)high) << 32) | low;
-}
-#define get_cycles get_cycles_inline
-#endif
-
-struct syscall_return_value {
-	long value;
-	long error;
-};
-
-/*
- * Find out the vDSO data page address in the process address space.
- */
-inline unsigned long get_datapage(void)
-{
-	unsigned long ret;
-
-	/* vdso data page located in the 2nd vDSO page. */
-	asm volatile ("lnk %0" : "=r"(ret));
-	ret &= ~(PAGE_SIZE - 1);
-	ret += PAGE_SIZE;
-
-	return ret;
-}
-
-static inline u64 vgetsns(struct vdso_data *vdso)
-{
-	return ((get_cycles() - vdso->cycle_last) & vdso->mask) * vdso->mult;
-}
-
-static inline int do_realtime(struct vdso_data *vdso, struct timespec *ts)
-{
-	unsigned count;
-	u64 ns;
-
-	do {
-		count = raw_read_seqcount_begin(&vdso->tb_seq);
-		ts->tv_sec = vdso->wall_time_sec;
-		ns = vdso->wall_time_snsec;
-		ns += vgetsns(vdso);
-		ns >>= vdso->shift;
-	} while (unlikely(read_seqcount_retry(&vdso->tb_seq, count)));
-
-	ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
-	ts->tv_nsec = ns;
-
-	return 0;
-}
-
-static inline int do_monotonic(struct vdso_data *vdso, struct timespec *ts)
-{
-	unsigned count;
-	u64 ns;
-
-	do {
-		count = raw_read_seqcount_begin(&vdso->tb_seq);
-		ts->tv_sec = vdso->monotonic_time_sec;
-		ns = vdso->monotonic_time_snsec;
-		ns += vgetsns(vdso);
-		ns >>= vdso->shift;
-	} while (unlikely(read_seqcount_retry(&vdso->tb_seq, count)));
-
-	ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
-	ts->tv_nsec = ns;
-
-	return 0;
-}
-
-static inline int do_realtime_coarse(struct vdso_data *vdso,
-				     struct timespec *ts)
-{
-	unsigned count;
-
-	do {
-		count = raw_read_seqcount_begin(&vdso->tb_seq);
-		ts->tv_sec = vdso->wall_time_coarse_sec;
-		ts->tv_nsec = vdso->wall_time_coarse_nsec;
-	} while (unlikely(read_seqcount_retry(&vdso->tb_seq, count)));
-
-	return 0;
-}
-
-static inline int do_monotonic_coarse(struct vdso_data *vdso,
-				      struct timespec *ts)
-{
-	unsigned count;
-
-	do {
-		count = raw_read_seqcount_begin(&vdso->tb_seq);
-		ts->tv_sec = vdso->monotonic_time_coarse_sec;
-		ts->tv_nsec = vdso->monotonic_time_coarse_nsec;
-	} while (unlikely(read_seqcount_retry(&vdso->tb_seq, count)));
-
-	return 0;
-}
-
-struct syscall_return_value __vdso_gettimeofday(struct timeval *tv,
-						struct timezone *tz)
-{
-	struct syscall_return_value ret = { 0, 0 };
-	unsigned count;
-	struct vdso_data *vdso = (struct vdso_data *)get_datapage();
-
-	/* The use of the timezone is obsolete, normally tz is NULL. */
-	if (unlikely(tz != NULL)) {
-		do {
-			count = raw_read_seqcount_begin(&vdso->tz_seq);
-			tz->tz_minuteswest = vdso->tz_minuteswest;
-			tz->tz_dsttime = vdso->tz_dsttime;
-		} while (unlikely(read_seqcount_retry(&vdso->tz_seq, count)));
-	}
-
-	if (unlikely(tv == NULL))
-		return ret;
-
-	do_realtime(vdso, (struct timespec *)tv);
-	tv->tv_usec /= 1000;
-
-	return ret;
-}
-
-int gettimeofday(struct timeval *tv, struct timezone *tz)
-	__attribute__((weak, alias("__vdso_gettimeofday")));
-
-static struct syscall_return_value vdso_fallback_gettime(long clock,
-							 struct timespec *ts)
-{
-	struct syscall_return_value ret;
-	__asm__ __volatile__ (
-		"swint1"
-		: "=R00" (ret.value), "=R01" (ret.error)
-		: "R10" (__NR_clock_gettime), "R00" (clock), "R01" (ts)
-		: "r2", "r3", "r4", "r5", "r6", "r7",
-		"r8",  "r9", "r11", "r12", "r13", "r14", "r15",
-		"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
-		"r24", "r25", "r26", "r27", "r28", "r29", "memory");
-	return ret;
-}
-
-struct syscall_return_value __vdso_clock_gettime(clockid_t clock,
-						 struct timespec *ts)
-{
-	struct vdso_data *vdso = (struct vdso_data *)get_datapage();
-	struct syscall_return_value ret = { 0, 0 };
-
-	switch (clock) {
-	case CLOCK_REALTIME:
-		do_realtime(vdso, ts);
-		return ret;
-	case CLOCK_MONOTONIC:
-		do_monotonic(vdso, ts);
-		return ret;
-	case CLOCK_REALTIME_COARSE:
-		do_realtime_coarse(vdso, ts);
-		return ret;
-	case CLOCK_MONOTONIC_COARSE:
-		do_monotonic_coarse(vdso, ts);
-		return ret;
-	default:
-		return vdso_fallback_gettime(clock, ts);
-	}
-}
-
-int clock_gettime(clockid_t clock, struct timespec *ts)
-	__attribute__((weak, alias("__vdso_clock_gettime")));
diff --git a/arch/tile/kernel/vdso/vrt_sigreturn.S b/arch/tile/kernel/vdso/vrt_sigreturn.S
deleted file mode 100644
index 6326caf4a039..000000000000
--- a/arch/tile/kernel/vdso/vrt_sigreturn.S
+++ /dev/null
@@ -1,30 +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.
- */
-
-#include <linux/linkage.h>
-#include <arch/abi.h>
-#include <asm/unistd.h>
-
-/*
- * Note that libc has a copy of this function that it uses to compare
- * against the PC when a stack backtrace ends, so if this code is
- * changed, the libc implementation(s) should also be updated.
- */
-ENTRY(__vdso_rt_sigreturn)
-	moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigreturn
-	swint1
-	/* We don't use ENDPROC to avoid tagging this symbol as FUNC,
-	 * which confuses the perf tool.
-	 */
-	END(__vdso_rt_sigreturn)