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, 225 deletions

diff --git a/arch/m32r/include/asm/cmpxchg.h b/arch/m32r/include/asm/cmpxchg.h
deleted file mode 100644
index 1ccdce5ff0ac..000000000000
--- a/arch/m32r/include/asm/cmpxchg.h
+++ /dev/null
@@ -1,225 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_M32R_CMPXCHG_H
-#define _ASM_M32R_CMPXCHG_H
-
-/*
- *  M32R version:
- *    Copyright (C) 2001, 2002  Hitoshi Yamamoto
- *    Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
- */
-
-#include <linux/irqflags.h>
-#include <asm/assembler.h>
-#include <asm/dcache_clear.h>
-
-extern void  __xchg_called_with_bad_pointer(void);
-
-static __always_inline unsigned long
-__xchg(unsigned long x, volatile void *ptr, int size)
-{
-	unsigned long flags;
-	unsigned long tmp = 0;
-
-	local_irq_save(flags);
-
-	switch (size) {
-#ifndef CONFIG_SMP
-	case 1:
-		__asm__ __volatile__ (
-			"ldb	%0, @%2 \n\t"
-			"stb	%1, @%2 \n\t"
-			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
-		break;
-	case 2:
-		__asm__ __volatile__ (
-			"ldh	%0, @%2 \n\t"
-			"sth	%1, @%2 \n\t"
-			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
-		break;
-	case 4:
-		__asm__ __volatile__ (
-			"ld	%0, @%2 \n\t"
-			"st	%1, @%2 \n\t"
-			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
-		break;
-#else  /* CONFIG_SMP */
-	case 4:
-		__asm__ __volatile__ (
-			DCACHE_CLEAR("%0", "r4", "%2")
-			"lock	%0, @%2;	\n\t"
-			"unlock	%1, @%2;	\n\t"
-			: "=&r" (tmp) : "r" (x), "r" (ptr)
-			: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-			, "r4"
-#endif	/* CONFIG_CHIP_M32700_TS1 */
-		);
-		break;
-#endif  /* CONFIG_SMP */
-	default:
-		__xchg_called_with_bad_pointer();
-	}
-
-	local_irq_restore(flags);
-
-	return (tmp);
-}
-
-#define xchg(ptr, x) ({							\
-	((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr),		\
-				    sizeof(*(ptr))));			\
-})
-
-static __always_inline unsigned long
-__xchg_local(unsigned long x, volatile void *ptr, int size)
-{
-	unsigned long flags;
-	unsigned long tmp = 0;
-
-	local_irq_save(flags);
-
-	switch (size) {
-	case 1:
-		__asm__ __volatile__ (
-			"ldb	%0, @%2 \n\t"
-			"stb	%1, @%2 \n\t"
-			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
-		break;
-	case 2:
-		__asm__ __volatile__ (
-			"ldh	%0, @%2 \n\t"
-			"sth	%1, @%2 \n\t"
-			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
-		break;
-	case 4:
-		__asm__ __volatile__ (
-			"ld	%0, @%2 \n\t"
-			"st	%1, @%2 \n\t"
-			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
-		break;
-	default:
-		__xchg_called_with_bad_pointer();
-	}
-
-	local_irq_restore(flags);
-
-	return (tmp);
-}
-
-#define xchg_local(ptr, x)						\
-	((__typeof__(*(ptr)))__xchg_local((unsigned long)(x), (ptr),	\
-			sizeof(*(ptr))))
-
-static inline unsigned long
-__cmpxchg_u32(volatile unsigned int *p, unsigned int old, unsigned int new)
-{
-	unsigned long flags;
-	unsigned int retval;
-
-	local_irq_save(flags);
-	__asm__ __volatile__ (
-			DCACHE_CLEAR("%0", "r4", "%1")
-			M32R_LOCK" %0, @%1;	\n"
-		"	bne	%0, %2, 1f;	\n"
-			M32R_UNLOCK" %3, @%1;	\n"
-		"	bra	2f;		\n"
-                "       .fillinsn		\n"
-		"1:"
-			M32R_UNLOCK" %0, @%1;	\n"
-                "       .fillinsn		\n"
-		"2:"
-			: "=&r" (retval)
-			: "r" (p), "r" (old), "r" (new)
-			: "cbit", "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-			, "r4"
-#endif  /* CONFIG_CHIP_M32700_TS1 */
-		);
-	local_irq_restore(flags);
-
-	return retval;
-}
-
-static inline unsigned long
-__cmpxchg_local_u32(volatile unsigned int *p, unsigned int old,
-			unsigned int new)
-{
-	unsigned long flags;
-	unsigned int retval;
-
-	local_irq_save(flags);
-	__asm__ __volatile__ (
-			DCACHE_CLEAR("%0", "r4", "%1")
-			"ld %0, @%1;		\n"
-		"	bne	%0, %2, 1f;	\n"
-			"st %3, @%1;		\n"
-		"	bra	2f;		\n"
-		"       .fillinsn		\n"
-		"1:"
-			"st %0, @%1;		\n"
-		"       .fillinsn		\n"
-		"2:"
-			: "=&r" (retval)
-			: "r" (p), "r" (old), "r" (new)
-			: "cbit", "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
-			, "r4"
-#endif  /* CONFIG_CHIP_M32700_TS1 */
-		);
-	local_irq_restore(flags);
-
-	return retval;
-}
-
-/* This function doesn't exist, so you'll get a linker error
-   if something tries to do an invalid cmpxchg().  */
-extern void __cmpxchg_called_with_bad_pointer(void);
-
-static inline unsigned long
-__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
-{
-	switch (size) {
-	case 4:
-		return __cmpxchg_u32(ptr, old, new);
-#if 0	/* we don't have __cmpxchg_u64 */
-	case 8:
-		return __cmpxchg_u64(ptr, old, new);
-#endif /* 0 */
-	}
-	__cmpxchg_called_with_bad_pointer();
-	return old;
-}
-
-#define cmpxchg(ptr, o, n) ({				\
-	((__typeof__(*(ptr)))				\
-		 __cmpxchg((ptr), (unsigned long)(o),	\
-			   (unsigned long)(n),		\
-			   sizeof(*(ptr))));		\
-})
-
-#include <asm-generic/cmpxchg-local.h>
-
-static inline unsigned long __cmpxchg_local(volatile void *ptr,
-				      unsigned long old,
-				      unsigned long new, int size)
-{
-	switch (size) {
-	case 4:
-		return __cmpxchg_local_u32(ptr, old, new);
-	default:
-		return __cmpxchg_local_generic(ptr, old, new, size);
-	}
-
-	return old;
-}
-
-/*
- * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
- * them available.
- */
-#define cmpxchg_local(ptr, o, n)				  	    \
-	((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o),	    \
-			(unsigned long)(n), sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
-
-#endif /* _ASM_M32R_CMPXCHG_H */