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, 91 deletions

diff --git a/arch/m32r/kernel/sys_m32r.c b/arch/m32r/kernel/sys_m32r.c
deleted file mode 100644
index 22a50fc49ab7..000000000000
--- a/arch/m32r/kernel/sys_m32r.c
+++ /dev/null
@@ -1,91 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/arch/m32r/kernel/sys_m32r.c
- *
- * This file contains various random system calls that
- * have a non-standard calling sequence on the Linux/M32R platform.
- *
- * Taken from i386 version.
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/smp.h>
-#include <linux/sem.h>
-#include <linux/msg.h>
-#include <linux/shm.h>
-#include <linux/stat.h>
-#include <linux/syscalls.h>
-#include <linux/mman.h>
-#include <linux/file.h>
-#include <linux/utsname.h>
-#include <linux/ipc.h>
-
-#include <linux/uaccess.h>
-#include <asm/cachectl.h>
-#include <asm/cacheflush.h>
-#include <asm/syscall.h>
-#include <asm/unistd.h>
-
-/*
- * sys_tas() - test-and-set
- */
-asmlinkage int sys_tas(int __user *addr)
-{
-	int oldval;
-
-	if (!access_ok(VERIFY_WRITE, addr, sizeof (int)))
-		return -EFAULT;
-
-	/* atomic operation:
-	 *   oldval = *addr; *addr = 1;
-	 */
-	__asm__ __volatile__ (
-		DCACHE_CLEAR("%0", "r4", "%1")
-		"	.fillinsn\n"
-		"1:\n"
-		"	lock	%0, @%1	    ->	unlock	%2, @%1\n"
-		"2:\n"
-		/* NOTE:
-		 *   The m32r processor can accept interrupts only
-		 *   at the 32-bit instruction boundary.
-		 *   So, in the above code, the "unlock" instruction
-		 *   can be executed continuously after the "lock"
-		 *   instruction execution without any interruptions.
-		 */
-		".section .fixup,\"ax\"\n"
-		"	.balign 4\n"
-		"3:	ldi	%0, #%3\n"
-		"	seth	r14, #high(2b)\n"
-		"	or3	r14, r14, #low(2b)\n"
-		"	jmp	r14\n"
-		".previous\n"
-		".section __ex_table,\"a\"\n"
-		"	.balign 4\n"
-		"	.long 1b,3b\n"
-		".previous\n"
-		: "=&r" (oldval)
-		: "r" (addr), "r" (1), "i"(-EFAULT)
-		: "r14", "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-		  , "r4"
-#endif /* CONFIG_CHIP_M32700_TS1 */
-	);
-
-	return oldval;
-}
-
-asmlinkage int sys_cacheflush(void *addr, int bytes, int cache)
-{
-	/* This should flush more selectively ...  */
-	_flush_cache_all();
-	return 0;
-}
-
-asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
-{
-	/* Not implemented yet. */
-	return -ENOSYS;
-}