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is no longer maintained, now struggles to build modern kernels due to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, 87 deletions

diff --git a/arch/metag/include/asm/cmpxchg_lnkget.h b/arch/metag/include/asm/cmpxchg_lnkget.h
deleted file mode 100644
index c69be00..0000000
--- a/arch/metag/include/asm/cmpxchg_lnkget.h
+++ /dev/null
@@ -1,87 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_METAG_CMPXCHG_LNKGET_H
-#define __ASM_METAG_CMPXCHG_LNKGET_H
-
-static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
-{
-	int temp, old;
-
-	smp_mb();
-
-	asm volatile (
-		      "1:	LNKGETD %1, [%2]\n"
-		      "	LNKSETD	[%2], %3\n"
-		      "	DEFR	%0, TXSTAT\n"
-		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
-		      "	CMPT	%0, #HI(0x02000000)\n"
-		      "	BNZ	1b\n"
-#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
-		      "	DCACHE	[%2], %0\n"
-#endif
-		      : "=&d" (temp), "=&d" (old)
-		      : "da" (m), "da" (val)
-		      : "cc"
-		      );
-
-	smp_mb();
-
-	return old;
-}
-
-static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
-{
-	int temp, old;
-
-	smp_mb();
-
-	asm volatile (
-		      "1:	LNKGETD %1, [%2]\n"
-		      "	LNKSETD	[%2], %3\n"
-		      "	DEFR	%0, TXSTAT\n"
-		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
-		      "	CMPT	%0, #HI(0x02000000)\n"
-		      "	BNZ	1b\n"
-#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
-		      "	DCACHE	[%2], %0\n"
-#endif
-		      : "=&d" (temp), "=&d" (old)
-		      : "da" (m), "da" (val & 0xff)
-		      : "cc"
-		      );
-
-	smp_mb();
-
-	return old;
-}
-
-static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
-					  unsigned long new)
-{
-	__u32 retval, temp;
-
-	smp_mb();
-
-	asm volatile (
-		      "1:	LNKGETD	%1, [%2]\n"
-		      "	CMP	%1, %3\n"
-		      "	LNKSETDEQ [%2], %4\n"
-		      "	BNE	2f\n"
-		      "	DEFR	%0, TXSTAT\n"
-		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
-		      "	CMPT	%0, #HI(0x02000000)\n"
-		      "	BNZ	1b\n"
-#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
-		      "	DCACHE	[%2], %0\n"
-#endif
-		      "2:\n"
-		      : "=&d" (temp), "=&d" (retval)
-		      : "da" (m), "bd" (old), "da" (new)
-		      : "cc"
-		      );
-
-	smp_mb();
-
-	return retval;
-}
-
-#endif /* __ASM_METAG_CMPXCHG_LNKGET_H */