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is no longer maintained, now struggles to build modern kernels due to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, 204 deletions

diff --git a/arch/metag/include/asm/atomic_lnkget.h b/arch/metag/include/asm/atomic_lnkget.h
deleted file mode 100644
index 17e8c61..0000000
--- a/arch/metag/include/asm/atomic_lnkget.h
+++ /dev/null
@@ -1,204 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_METAG_ATOMIC_LNKGET_H
-#define __ASM_METAG_ATOMIC_LNKGET_H
-
-#define ATOMIC_INIT(i)	{ (i) }
-
-#define atomic_set(v, i)		WRITE_ONCE((v)->counter, (i))
-
-#include <linux/compiler.h>
-
-#include <asm/barrier.h>
-
-/*
- * None of these asm statements clobber memory as LNKSET writes around
- * the cache so the memory it modifies cannot safely be read by any means
- * other than these accessors.
- */
-
-static inline int atomic_read(const atomic_t *v)
-{
-	int temp;
-
-	asm volatile (
-		"LNKGETD %0, [%1]\n"
-		: "=da" (temp)
-		: "da" (&v->counter));
-
-	return temp;
-}
-
-#define ATOMIC_OP(op)							\
-static inline void atomic_##op(int i, atomic_t *v)			\
-{									\
-	int temp;							\
-									\
-	asm volatile (							\
-		"1:	LNKGETD %0, [%1]\n"				\
-		"	" #op "	%0, %0, %2\n"				\
-		"	LNKSETD [%1], %0\n"				\
-		"	DEFR	%0, TXSTAT\n"				\
-		"	ANDT	%0, %0, #HI(0x3f000000)\n"		\
-		"	CMPT	%0, #HI(0x02000000)\n"			\
-		"	BNZ	1b\n"					\
-		: "=&d" (temp)						\
-		: "da" (&v->counter), "bd" (i)				\
-		: "cc");						\
-}									\
-
-#define ATOMIC_OP_RETURN(op)						\
-static inline int atomic_##op##_return(int i, atomic_t *v)		\
-{									\
-	int result, temp;						\
-									\
-	smp_mb();							\
-									\
-	asm volatile (							\
-		"1:	LNKGETD %1, [%2]\n"				\
-		"	" #op "	%1, %1, %3\n"				\
-		"	LNKSETD [%2], %1\n"				\
-		"	DEFR	%0, TXSTAT\n"				\
-		"	ANDT	%0, %0, #HI(0x3f000000)\n"		\
-		"	CMPT	%0, #HI(0x02000000)\n"			\
-		"	BNZ 1b\n"					\
-		: "=&d" (temp), "=&da" (result)				\
-		: "da" (&v->counter), "br" (i)				\
-		: "cc");						\
-									\
-	smp_mb();							\
-									\
-	return result;							\
-}
-
-#define ATOMIC_FETCH_OP(op)						\
-static inline int atomic_fetch_##op(int i, atomic_t *v)			\
-{									\
-	int result, temp;						\
-									\
-	smp_mb();							\
-									\
-	asm volatile (							\
-		"1:	LNKGETD %1, [%2]\n"				\
-		"	" #op "	%0, %1, %3\n"				\
-		"	LNKSETD [%2], %0\n"				\
-		"	DEFR	%0, TXSTAT\n"				\
-		"	ANDT	%0, %0, #HI(0x3f000000)\n"		\
-		"	CMPT	%0, #HI(0x02000000)\n"			\
-		"	BNZ 1b\n"					\
-		: "=&d" (temp), "=&d" (result)				\
-		: "da" (&v->counter), "bd" (i)				\
-		: "cc");						\
-									\
-	smp_mb();							\
-									\
-	return result;							\
-}
-
-#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
-
-ATOMIC_OPS(add)
-ATOMIC_OPS(sub)
-
-#undef ATOMIC_OPS
-#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
-
-ATOMIC_OPS(and)
-ATOMIC_OPS(or)
-ATOMIC_OPS(xor)
-
-#undef ATOMIC_OPS
-#undef ATOMIC_FETCH_OP
-#undef ATOMIC_OP_RETURN
-#undef ATOMIC_OP
-
-static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
-{
-	int result, 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"
-		"2:\n"
-		: "=&d" (temp), "=&d" (result)
-		: "da" (&v->counter), "bd" (old), "da" (new)
-		: "cc");
-
-	smp_mb();
-
-	return result;
-}
-
-static inline int atomic_xchg(atomic_t *v, int new)
-{
-	int temp, old;
-
-	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"
-		: "=&d" (temp), "=&d" (old)
-		: "da" (&v->counter), "da" (new)
-		: "cc");
-
-	return old;
-}
-
-static inline int __atomic_add_unless(atomic_t *v, int a, int u)
-{
-	int result, temp;
-
-	smp_mb();
-
-	asm volatile (
-		"1:	LNKGETD %1, [%2]\n"
-		"	CMP	%1, %3\n"
-		"	ADD	%0, %1, %4\n"
-		"	LNKSETDNE [%2], %0\n"
-		"	BEQ	2f\n"
-		"	DEFR	%0, TXSTAT\n"
-		"	ANDT	%0, %0, #HI(0x3f000000)\n"
-		"	CMPT	%0, #HI(0x02000000)\n"
-		"	BNZ	1b\n"
-		"2:\n"
-		: "=&d" (temp), "=&d" (result)
-		: "da" (&v->counter), "bd" (u), "bd" (a)
-		: "cc");
-
-	smp_mb();
-
-	return result;
-}
-
-static inline int atomic_sub_if_positive(int i, atomic_t *v)
-{
-	int result, temp;
-
-	asm volatile (
-		"1:	LNKGETD %1, [%2]\n"
-		"	SUBS	%1, %1, %3\n"
-		"	LNKSETDGE [%2], %1\n"
-		"	BLT	2f\n"
-		"	DEFR	%0, TXSTAT\n"
-		"	ANDT	%0, %0, #HI(0x3f000000)\n"
-		"	CMPT	%0, #HI(0x02000000)\n"
-		"	BNZ	1b\n"
-		"2:\n"
-		: "=&d" (temp), "=&da" (result)
-		: "da" (&v->counter), "bd" (i)
-		: "cc");
-
-	return result;
-}
-
-#endif /* __ASM_METAG_ATOMIC_LNKGET_H */