arch: remove m32r port

The Mitsubishi/Renesas m32r architecture has been around for many years,
but the Linux port has been obsolete for a very long time as well, with
the last significant updates done for linux-2.6.14.

While some m32r microcontrollers are still being marketed by Renesas,
those are apparently no longer possible to support, mainly due to the
lack of an external memory interface.

Hirokazu Takata was the maintainer until the architecture got marked
Orphaned in 2014.

Link: http://www.linux-m32r.org/
Link: https://www.renesas.com/en-eu/products/microcontrollers-microprocessors/m32r.html
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 202 deletions

diff --git a/arch/m32r/include/asm/checksum.h b/arch/m32r/include/asm/checksum.h
deleted file mode 100644
index d68e93c9bd62..000000000000
--- a/arch/m32r/include/asm/checksum.h
+++ /dev/null
@@ -1,202 +0,0 @@
-#ifdef __KERNEL__
-#ifndef _ASM_M32R_CHECKSUM_H
-#define _ASM_M32R_CHECKSUM_H
-
-/*
- * include/asm-m32r/checksum.h
- *
- * IP/TCP/UDP checksum routines
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Some code taken from mips and parisc architecture.
- *
- *    Copyright (C) 2001, 2002  Hiroyuki Kondo, Hirokazu Takata
- *    Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
- */
-
-#include <linux/in6.h>
-
-/*
- * computes the checksum of a memory block at buff, length len,
- * and adds in "sum" (32-bit)
- *
- * returns a 32-bit number suitable for feeding into itself
- * or csum_tcpudp_magic
- *
- * this function must be called with even lengths, except
- * for the last fragment, which may be odd
- *
- * it's best to have buff aligned on a 32-bit boundary
- */
-asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum);
-
-/*
- * The same as csum_partial, but copies from src while it checksums.
- *
- * Here even more important to align src and dst on a 32-bit (or even
- * better 64-bit) boundary
- */
-extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
-                                              int len, __wsum sum);
-
-/*
- * This is a new version of the above that records errors it finds in *errp,
- * but continues and zeros thre rest of the buffer.
- */
-extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
-                                                int len, __wsum sum,
-                                                int *err_ptr);
-
-/*
- *	Fold a partial checksum
- */
-
-static inline __sum16 csum_fold(__wsum sum)
-{
-	unsigned long tmpreg;
-	__asm__(
-		"	sll3	%1, %0, #16 \n"
-		"	cmp	%0, %0 \n"
-		"	addx	%0, %1 \n"
-		"	ldi	%1, #0 \n"
-		"	srli	%0, #16 \n"
-		"	addx	%0, %1 \n"
-		"	xor3	%0, %0, #0x0000ffff \n"
-		: "=r" (sum), "=&r" (tmpreg)
-		: "0"  (sum)
-		: "cbit"
-	);
-	return (__force __sum16)sum;
-}
-
-/*
- * This is a version of ip_compute_csum() optimized for IP headers,
- * which always checksum on 4 octet boundaries.
- */
-static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
-{
-	unsigned long tmpreg0, tmpreg1;
-	__wsum sum;
-
-	__asm__ __volatile__(
-		"	ld	%0, @%1+ \n"
-		"	addi	%2, #-4 \n"
-		"#	bgez	%2, 2f \n"
-		"	cmp	%0, %0 \n"
-		"	ld	%3, @%1+ \n"
-		"	ld	%4, @%1+ \n"
-		"	addx	%0, %3 \n"
-		"	ld	%3, @%1+ \n"
-		"	addx	%0, %4 \n"
-		"	addx	%0, %3 \n"
-		"	.fillinsn\n"
-		"1: \n"
-		"	ld	%4, @%1+ \n"
-		"	addi	%2, #-1 \n"
-		"	addx	%0, %4 \n"
-		"	bgtz	%2, 1b \n"
-		"\n"
-		"	ldi	%3, #0 \n"
-		"	addx	%0, %3 \n"
-		"	.fillinsn\n"
-		"2: \n"
-	/* Since the input registers which are loaded with iph and ihl
-	   are modified, we must also specify them as outputs, or gcc
-	   will assume they contain their original values. */
-	: "=&r" (sum), "=r" (iph), "=r" (ihl), "=&r" (tmpreg0), "=&r" (tmpreg1)
-	: "1" (iph), "2" (ihl)
-	: "cbit", "memory");
-
-	return csum_fold(sum);
-}
-
-static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
-					__u32 len, __u8 proto,
-					__wsum sum)
-{
-#if defined(__LITTLE_ENDIAN)
-	unsigned long len_proto = (proto + len) << 8;
-#else
-	unsigned long len_proto = proto + len;
-#endif
-	unsigned long tmpreg;
-
-	__asm__(
-		"	cmp	%0, %0 \n"
-		"	addx	%0, %2 \n"
-		"	addx	%0, %3 \n"
-		"	addx	%0, %4 \n"
-		"	ldi	%1, #0 \n"
-		"	addx	%0, %1 \n"
-		: "=r" (sum), "=&r" (tmpreg)
-		: "r" (daddr), "r" (saddr), "r" (len_proto), "0" (sum)
-		: "cbit"
-	);
-
-	return sum;
-}
-
-/*
- * computes the checksum of the TCP/UDP pseudo-header
- * returns a 16-bit checksum, already complemented
- */
-static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
-					__u32 len, __u8 proto,
-					__wsum sum)
-{
-	return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
-}
-
-/*
- * this routine is used for miscellaneous IP-like checksums, mainly
- * in icmp.c
- */
-
-static inline __sum16 ip_compute_csum(const void *buff, int len)
-{
-	return csum_fold (csum_partial(buff, len, 0));
-}
-
-#define _HAVE_ARCH_IPV6_CSUM
-static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
-				      const struct in6_addr *daddr,
-				      __u32 len, unsigned short proto,
-				      __wsum sum)
-{
-	unsigned long tmpreg0, tmpreg1, tmpreg2, tmpreg3;
-	__asm__(
-		"	ld	%1, @(%5) \n"
-		"	ld	%2, @(4,%5) \n"
-		"	ld	%3, @(8,%5) \n"
-		"	ld	%4, @(12,%5) \n"
-		"	add	%0, %1 \n"
-		"	addx	%0, %2 \n"
-		"	addx	%0, %3 \n"
-		"	addx	%0, %4 \n"
-		"	ld	%1, @(%6) \n"
-		"	ld	%2, @(4,%6) \n"
-		"	ld	%3, @(8,%6) \n"
-		"	ld	%4, @(12,%6) \n"
-		"	addx	%0, %1 \n"
-		"	addx	%0, %2 \n"
-		"	addx	%0, %3 \n"
-		"	addx	%0, %4 \n"
-		"	addx	%0, %7 \n"
-		"	addx	%0, %8 \n"
-		"	ldi	%1, #0 \n"
-		"	addx	%0, %1 \n"
-		: "=&r" (sum), "=&r" (tmpreg0), "=&r" (tmpreg1),
-		  "=&r" (tmpreg2), "=&r" (tmpreg3)
-		: "r" (saddr), "r" (daddr),
-		  "r" (htonl(len)), "r" (htonl(proto)), "0" (sum)
-		: "cbit"
-	);
-
-	return csum_fold(sum);
-}
-
-#endif /* _ASM_M32R_CHECKSUM_H */
-#endif /* __KERNEL__ */