avr32: remove support for AVR32 architecture

This patch drops support for AVR32 architecture from the Linux kernel.

The AVR32 architecture is not keeping up with the development of the
kernel, and since it shares so much of the drivers with Atmel ARM SoC,
it is starting to hinder these drivers to develop swiftly.

Also, all AVR32 AP7 SoC processors are end of lifed from Atmel (now
Microchip).

Finally, the GCC toolchain is stuck at version 4.2.x, and has not
received any patches since the last release from Atmel;
4.2.4-atmel.1.1.3.avr32linux.1. When building kernel v4.10, this
toolchain is no longer able to properly link the network stack.

Haavard and I have came to the conclusion that we feel keeping AVR32 on
life support offers more obstacles for Atmel ARMs, than it gives joy to
AVR32 users. I also suspect there are very few AVR32 users left today,
if anybody at all.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Håvard Skinnemoen <hskinnemoen@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>

1 files changed, 0 insertions, 337 deletions

diff --git a/arch/avr32/include/asm/uaccess.h b/arch/avr32/include/asm/uaccess.h
deleted file mode 100644
index b1ec1fa06463..000000000000
--- a/arch/avr32/include/asm/uaccess.h
+++ /dev/null
@@ -1,337 +0,0 @@
-/*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef __ASM_AVR32_UACCESS_H
-#define __ASM_AVR32_UACCESS_H
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-
-#define VERIFY_READ	0
-#define VERIFY_WRITE	1
-
-typedef struct {
-	unsigned int is_user_space;
-} mm_segment_t;
-
-/*
- * The fs value determines whether argument validity checking should be
- * performed or not.  If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons (Data Segment Register?), these macros are misnamed.
- */
-#define MAKE_MM_SEG(s)	((mm_segment_t) { (s) })
-#define segment_eq(a, b)	((a).is_user_space == (b).is_user_space)
-
-#define USER_ADDR_LIMIT 0x80000000
-
-#define KERNEL_DS	MAKE_MM_SEG(0)
-#define USER_DS		MAKE_MM_SEG(1)
-
-#define get_ds()	(KERNEL_DS)
-
-static inline mm_segment_t get_fs(void)
-{
-	return MAKE_MM_SEG(test_thread_flag(TIF_USERSPACE));
-}
-
-static inline void set_fs(mm_segment_t s)
-{
-	if (s.is_user_space)
-		set_thread_flag(TIF_USERSPACE);
-	else
-		clear_thread_flag(TIF_USERSPACE);
-}
-
-/*
- * Test whether a block of memory is a valid user space address.
- * Returns 0 if the range is valid, nonzero otherwise.
- *
- * We do the following checks:
- *   1. Is the access from kernel space?
- *   2. Does (addr + size) set the carry bit?
- *   3. Is (addr + size) a negative number (i.e. >= 0x80000000)?
- *
- * If yes on the first check, access is granted.
- * If no on any of the others, access is denied.
- */
-#define __range_ok(addr, size)						\
-	(test_thread_flag(TIF_USERSPACE)				\
-	 && (((unsigned long)(addr) >= 0x80000000)			\
-	     || ((unsigned long)(size) > 0x80000000)			\
-	     || (((unsigned long)(addr) + (unsigned long)(size)) > 0x80000000)))
-
-#define access_ok(type, addr, size) (likely(__range_ok(addr, size) == 0))
-
-/* Generic arbitrary sized copy. Return the number of bytes NOT copied */
-extern __kernel_size_t __copy_user(void *to, const void *from,
-				   __kernel_size_t n);
-
-extern __kernel_size_t copy_to_user(void __user *to, const void *from,
-				    __kernel_size_t n);
-extern __kernel_size_t ___copy_from_user(void *to, const void __user *from,
-				      __kernel_size_t n);
-
-static inline __kernel_size_t __copy_to_user(void __user *to, const void *from,
-					     __kernel_size_t n)
-{
-	return __copy_user((void __force *)to, from, n);
-}
-static inline __kernel_size_t __copy_from_user(void *to,
-					       const void __user *from,
-					       __kernel_size_t n)
-{
-	return __copy_user(to, (const void __force *)from, n);
-}
-static inline __kernel_size_t copy_from_user(void *to,
-					       const void __user *from,
-					       __kernel_size_t n)
-{
-	size_t res = ___copy_from_user(to, from, n);
-	if (unlikely(res))
-		memset(to + (n - res), 0, res);
-	return res;
-}
-
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
-
-/*
- * put_user: - Write a simple value into user space.
- * @x:   Value to copy to user space.
- * @ptr: Destination address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * This macro copies a single simple value from kernel space to user
- * space.  It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and @x must be assignable
- * to the result of dereferencing @ptr.
- *
- * Returns zero on success, or -EFAULT on error.
- */
-#define put_user(x, ptr)	\
-	__put_user_check((x), (ptr), sizeof(*(ptr)))
-
-/*
- * get_user: - Get a simple variable from user space.
- * @x:   Variable to store result.
- * @ptr: Source address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * This macro copies a single simple variable from user space to kernel
- * space.  It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and the result of
- * dereferencing @ptr must be assignable to @x without a cast.
- *
- * Returns zero on success, or -EFAULT on error.
- * On error, the variable @x is set to zero.
- */
-#define get_user(x, ptr) \
-	__get_user_check((x), (ptr), sizeof(*(ptr)))
-
-/*
- * __put_user: - Write a simple value into user space, with less checking.
- * @x:   Value to copy to user space.
- * @ptr: Destination address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * This macro copies a single simple value from kernel space to user
- * space.  It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and @x must be assignable
- * to the result of dereferencing @ptr.
- *
- * Caller must check the pointer with access_ok() before calling this
- * function.
- *
- * Returns zero on success, or -EFAULT on error.
- */
-#define __put_user(x, ptr) \
-	__put_user_nocheck((x), (ptr), sizeof(*(ptr)))
-
-/*
- * __get_user: - Get a simple variable from user space, with less checking.
- * @x:   Variable to store result.
- * @ptr: Source address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * This macro copies a single simple variable from user space to kernel
- * space.  It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and the result of
- * dereferencing @ptr must be assignable to @x without a cast.
- *
- * Caller must check the pointer with access_ok() before calling this
- * function.
- *
- * Returns zero on success, or -EFAULT on error.
- * On error, the variable @x is set to zero.
- */
-#define __get_user(x, ptr) \
-	__get_user_nocheck((x), (ptr), sizeof(*(ptr)))
-
-extern int __get_user_bad(void);
-extern int __put_user_bad(void);
-
-#define __get_user_nocheck(x, ptr, size)				\
-({									\
-	unsigned long __gu_val = 0;					\
-	int __gu_err = 0;						\
-									\
-	switch (size) {							\
-	case 1: __get_user_asm("ub", __gu_val, ptr, __gu_err); break;	\
-	case 2: __get_user_asm("uh", __gu_val, ptr, __gu_err); break;	\
-	case 4: __get_user_asm("w", __gu_val, ptr, __gu_err); break;	\
-	default: __gu_err = __get_user_bad(); break;			\
-	}								\
-									\
-	x = (__force typeof(*(ptr)))__gu_val;				\
-	__gu_err;							\
-})
-
-#define __get_user_check(x, ptr, size)					\
-({									\
-	unsigned long __gu_val = 0;					\
-	const typeof(*(ptr)) __user * __gu_addr = (ptr);		\
-	int __gu_err = 0;						\
-									\
-	if (access_ok(VERIFY_READ, __gu_addr, size)) {			\
-		switch (size) {						\
-		case 1:							\
-			__get_user_asm("ub", __gu_val, __gu_addr,	\
-				       __gu_err);			\
-			break;						\
-		case 2:							\
-			__get_user_asm("uh", __gu_val, __gu_addr,	\
-				       __gu_err);			\
-			break;						\
-		case 4:							\
-			__get_user_asm("w", __gu_val, __gu_addr,	\
-				       __gu_err);			\
-			break;						\
-		default:						\
-			__gu_err = __get_user_bad();			\
-			break;						\
-		}							\
-	} else {							\
-		__gu_err = -EFAULT;					\
-	}								\
-	x = (__force typeof(*(ptr)))__gu_val;				\
-	__gu_err;							\
-})
-
-#define __get_user_asm(suffix, __gu_val, ptr, __gu_err)			\
-	asm volatile(							\
-		"1:	ld." suffix "	%1, %3			\n"	\
-		"2:						\n"	\
-		"	.subsection 1				\n"	\
-		"3:	mov	%0, %4				\n"	\
-		"	rjmp	2b				\n"	\
-		"	.subsection 0				\n"	\
-		"	.section __ex_table, \"a\"		\n"	\
-		"	.long	1b, 3b				\n"	\
-		"	.previous				\n"	\
-		: "=r"(__gu_err), "=r"(__gu_val)			\
-		: "0"(__gu_err), "m"(*(ptr)), "i"(-EFAULT))
-
-#define __put_user_nocheck(x, ptr, size)				\
-({									\
-	typeof(*(ptr)) __pu_val;					\
-	int __pu_err = 0;						\
-									\
-	__pu_val = (x);							\
-	switch (size) {							\
-	case 1: __put_user_asm("b", ptr, __pu_val, __pu_err); break;	\
-	case 2: __put_user_asm("h", ptr, __pu_val, __pu_err); break;	\
-	case 4: __put_user_asm("w", ptr, __pu_val, __pu_err); break;	\
-	case 8: __put_user_asm("d", ptr, __pu_val, __pu_err); break;	\
-	default: __pu_err = __put_user_bad(); break;			\
-	}								\
-	__pu_err;							\
-})
-
-#define __put_user_check(x, ptr, size)					\
-({									\
-	typeof(*(ptr)) __pu_val;					\
-	typeof(*(ptr)) __user *__pu_addr = (ptr);			\
-	int __pu_err = 0;						\
-									\
-	__pu_val = (x);							\
-	if (access_ok(VERIFY_WRITE, __pu_addr, size)) {			\
-		switch (size) {						\
-		case 1:							\
-			__put_user_asm("b", __pu_addr, __pu_val,	\
-				       __pu_err);			\
-			break;						\
-		case 2:							\
-			__put_user_asm("h", __pu_addr, __pu_val,	\
-				       __pu_err);			\
-			break;						\
-		case 4:							\
-			__put_user_asm("w", __pu_addr, __pu_val,	\
-				       __pu_err);			\
-			break;						\
-		case 8:							\
-			__put_user_asm("d", __pu_addr, __pu_val,	\
-				       __pu_err);			\
-			break;						\
-		default:						\
-			__pu_err = __put_user_bad();			\
-			break;						\
-		}							\
-	} else {							\
-		__pu_err = -EFAULT;					\
-	}								\
-	__pu_err;							\
-})
-
-#define __put_user_asm(suffix, ptr, __pu_val, __gu_err)			\
-	asm volatile(							\
-		"1:	st." suffix "	%1, %3			\n"	\
-		"2:						\n"	\
-		"	.subsection 1				\n"	\
-		"3:	mov	%0, %4				\n"	\
-		"	rjmp	2b				\n"	\
-		"	.subsection 0				\n"	\
-		"	.section __ex_table, \"a\"		\n"	\
-		"	.long	1b, 3b				\n"	\
-		"	.previous				\n"	\
-		: "=r"(__gu_err), "=m"(*(ptr))				\
-		: "0"(__gu_err), "r"(__pu_val), "i"(-EFAULT))
-
-extern __kernel_size_t clear_user(void __user *addr, __kernel_size_t size);
-extern __kernel_size_t __clear_user(void __user *addr, __kernel_size_t size);
-
-extern long strncpy_from_user(char *dst, const char __user *src, long count);
-extern long __strncpy_from_user(char *dst, const char __user *src, long count);
-
-extern long strnlen_user(const char __user *__s, long __n);
-extern long __strnlen_user(const char __user *__s, long __n);
-
-#define strlen_user(s) strnlen_user(s, ~0UL >> 1)
-
-struct exception_table_entry
-{
-	unsigned long insn, fixup;
-};
-
-#endif /* __ASM_AVR32_UACCESS_H */