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is no longer maintained, now struggles to build modern kernels due to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, 33 deletions

diff --git a/arch/metag/lib/ip_fast_csum.S b/arch/metag/lib/ip_fast_csum.S
deleted file mode 100644
index 441f489..0000000
--- a/arch/metag/lib/ip_fast_csum.S
+++ /dev/null
@@ -1,33 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-	.text
-/*
- * This is a version of ip_compute_csum() optimized for IP headers,
- * which always checksum on 4 octet boundaries.
- *
- * extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
- *
- */
-	.global _ip_fast_csum
-	.type   _ip_fast_csum,function
-_ip_fast_csum:
-	!! TXRPT needs loops - 1
-	SUBS	TXRPT,D0Ar2,#1
-	MOV	D0Re0,#0
-	BLO	$Lfast_csum_exit
-$Lfast_csum_loop:
-	GETD	D1Ar3,[D1Ar1++]
-	ADDS	D0Re0,D0Re0,D1Ar3
-	ADDCS   D0Re0,D0Re0,#1
-	BR	$Lfast_csum_loop
-	LSR	D0Ar4,D0Re0,#16
-	AND	D0Re0,D0Re0,#0xffff
-	AND	D0Ar4,D0Ar4,#0xffff
-	ADD	D0Re0,D0Re0,D0Ar4
-	LSR	D0Ar4,D0Re0,#16
-	ADD	D0Re0,D0Re0,D0Ar4
-	XOR	D0Re0,D0Re0,#-1
-	AND	D0Re0,D0Re0,#0xffff
-$Lfast_csum_exit:
-	MOV	PC,D1RtP
-	.size _ip_fast_csum,.-_ip_fast_csum