metag: Remove arch/metag/

The earliest Meta architecture port of Linux I have a record of was an
import of a Meta port of Linux v2.4.1 in February 2004, which was worked
on significantly over the next few years by Graham Whaley, Will Newton,
Matt Fleming, myself and others.

Eventually the port was merged into mainline in v3.9 in March 2013, not
long after Imagination Technologies bought MIPS Technologies and shifted
its CPU focus over to the MIPS architecture.

As a result, though the port was maintained for a while, kept on life
support for a while longer, and useful for testing a few specific
drivers for which I don't have ready access to the equivalent MIPS
hardware, it is now essentially dead with no users.

It is also stuck using an out-of-tree toolchain based on GCC 4.2.4 which
is no longer maintained, now struggles to build modern kernels due to
toolchain bugs, and doesn't itself build with a modern GCC. The latest
buildroot port is still using an old uClibc snapshot which is no longer
served, and the latest uClibc doesn't build with GCC 4.2.4.

So lets call it a day and drop the Meta architecture port from the
kernel. RIP Meta.

Signed-off-by: James Hogan <jhogan@kernel.org>
Link: https://lkml.kernel.org/r/95906b76-6ce1-3f84-eaba-c29b4ae952eb@roeck-us.net
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Graham Whaley <graham.whaley@gmail.com>
Cc: linux-metag@vger.kernel.org

1 files changed, 0 insertions, 45 deletions

diff --git a/arch/metag/include/asm/user_gateway.h b/arch/metag/include/asm/user_gateway.h
deleted file mode 100644
index cf2392b9..0000000
--- a/arch/metag/include/asm/user_gateway.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2010 Imagination Technologies
- */
-
-#ifndef __ASM_METAG_USER_GATEWAY_H
-#define __ASM_METAG_USER_GATEWAY_H
-
-#include <asm/page.h>
-
-/* Page of kernel code accessible to userspace. */
-#define USER_GATEWAY_PAGE	0x6ffff000
-/* Offset of TLS pointer array in gateway page. */
-#define USER_GATEWAY_TLS	0x100
-
-#ifndef __ASSEMBLY__
-
-extern char __user_gateway_start;
-extern char __user_gateway_end;
-
-/* Kernel mapping of the gateway page. */
-extern void *gateway_page;
-
-static inline void set_gateway_tls(void __user *tls_ptr)
-{
-	void **gateway_tls = (void **)(gateway_page + USER_GATEWAY_TLS +
-				       hard_processor_id() * 4);
-
-	*gateway_tls = (__force void *)tls_ptr;
-#ifdef CONFIG_METAG_META12
-	/* Avoid cache aliases on virtually tagged cache. */
-	__builtin_dcache_flush((void *)USER_GATEWAY_PAGE + USER_GATEWAY_TLS +
-				       hard_processor_id() * sizeof(void *));
-#endif
-}
-
-extern int __kuser_get_tls(void);
-extern char *__kuser_get_tls_end[];
-
-extern int __kuser_cmpxchg(int, int, unsigned long *);
-extern char *__kuser_cmpxchg_end[];
-
-#endif
-
-#endif