arch: remove blackfin port

The Analog Devices Blackfin port was added in 2007 and was rather
active for a while, but all work on it has come to a standstill
over time, as Analog have changed their product line-up.

Aaron Wu confirmed that the architecture port is no longer relevant,
and multiple people suggested removing blackfin independently because
of some of its oddities like a non-working SMP port, and the amount of
duplication between the chip variants, which cause extra work when
doing cross-architecture changes.

Link: https://docs.blackfin.uclinux.org/
Acked-by: Aaron Wu <Aaron.Wu@analog.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 234 deletions

diff --git a/arch/blackfin/include/asm/uaccess.h b/arch/blackfin/include/asm/uaccess.h
deleted file mode 100644
index 45da4bcb050e..000000000000
--- a/arch/blackfin/include/asm/uaccess.h
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- * Copyright 2004-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- *
- * Based on: include/asm-m68knommu/uaccess.h
- */
-
-#ifndef __BLACKFIN_UACCESS_H
-#define __BLACKFIN_UACCESS_H
-
-/*
- * User space memory access functions
- */
-#include <linux/mm.h>
-#include <linux/string.h>
-
-#include <asm/segment.h>
-#include <asm/sections.h>
-
-#define get_ds()        (KERNEL_DS)
-#define get_fs()        (current_thread_info()->addr_limit)
-
-static inline void set_fs(mm_segment_t fs)
-{
-	current_thread_info()->addr_limit = fs;
-}
-
-#define segment_eq(a, b) ((a) == (b))
-
-#define access_ok(type, addr, size) _access_ok((unsigned long)(addr), (size))
-
-/*
- * 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.
- */
-
-#ifndef CONFIG_ACCESS_CHECK
-static inline int _access_ok(unsigned long addr, unsigned long size) { return 1; }
-#else
-extern int _access_ok(unsigned long addr, unsigned long size);
-#endif
-
-#include <asm/extable.h>
-
-/*
- * These are the main single-value transfer routines.  They automatically
- * use the right size if we just have the right pointer type.
- */
-
-#define put_user(x, p)						\
-	({							\
-		int _err = 0;					\
-		typeof(*(p)) _x = (x);				\
-		typeof(*(p)) __user *_p = (p);			\
-		if (!access_ok(VERIFY_WRITE, _p, sizeof(*(_p)))) {\
-			_err = -EFAULT;				\
-		}						\
-		else {						\
-		switch (sizeof (*(_p))) {			\
-		case 1:						\
-			__put_user_asm(_x, _p, B);		\
-			break;					\
-		case 2:						\
-			__put_user_asm(_x, _p, W);		\
-			break;					\
-		case 4:						\
-			__put_user_asm(_x, _p,  );		\
-			break;					\
-		case 8: {					\
-			long _xl, _xh;				\
-			_xl = ((__force long *)&_x)[0];		\
-			_xh = ((__force long *)&_x)[1];		\
-			__put_user_asm(_xl, ((__force long __user *)_p)+0, );\
-			__put_user_asm(_xh, ((__force long __user *)_p)+1, );\
-		} break;					\
-		default:					\
-			_err = __put_user_bad();		\
-			break;					\
-		}						\
-		}						\
-		_err;						\
-	})
-
-#define __put_user(x, p) put_user(x, p)
-static inline int bad_user_access_length(void)
-{
-	panic("bad_user_access_length");
-	return -1;
-}
-
-#define __put_user_bad() (printk(KERN_INFO "put_user_bad %s:%d %s\n",\
-                           __FILE__, __LINE__, __func__),\
-                           bad_user_access_length(), (-EFAULT))
-
-/*
- * Tell gcc we read from memory instead of writing: this is because
- * we do not write to any memory gcc knows about, so there are no
- * aliasing issues.
- */
-
-#define __ptr(x) ((unsigned long __force *)(x))
-
-#define __put_user_asm(x, p, bhw)			\
-	__asm__ (#bhw"[%1] = %0;\n\t"			\
-		 : /* no outputs */			\
-		 :"d" (x), "a" (__ptr(p)) : "memory")
-
-#define get_user(x, ptr)					\
-({								\
-	int _err = 0;						\
-	unsigned long _val = 0;					\
-	const typeof(*(ptr)) __user *_p = (ptr);		\
-	const size_t ptr_size = sizeof(*(_p));			\
-	if (likely(access_ok(VERIFY_READ, _p, ptr_size))) {	\
-		BUILD_BUG_ON(ptr_size >= 8);			\
-		switch (ptr_size) {				\
-		case 1:						\
-			__get_user_asm(_val, _p, B, (Z));	\
-			break;					\
-		case 2:						\
-			__get_user_asm(_val, _p, W, (Z));	\
-			break;					\
-		case 4:						\
-			__get_user_asm(_val, _p,  , );		\
-			break;					\
-		}						\
-	} else							\
-		_err = -EFAULT;					\
-	x = (__force typeof(*(ptr)))_val;			\
-	_err;							\
-})
-
-#define __get_user(x, p) get_user(x, p)
-
-#define __get_user_bad() (bad_user_access_length(), (-EFAULT))
-
-#define __get_user_asm(x, ptr, bhw, option)	\
-({						\
-	__asm__ __volatile__ (			\
-		"%0 =" #bhw "[%1]" #option ";"	\
-		: "=d" (x)			\
-		: "a" (__ptr(ptr)));		\
-})
-
-static inline unsigned long __must_check
-raw_copy_from_user(void *to, const void __user *from, unsigned long n)
-{
-	memcpy(to, (const void __force *)from, n);
-	return 0;
-}
-
-static inline unsigned long __must_check
-raw_copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-	memcpy((void __force *)to, from, n);
-	SSYNC();
-	return 0;
-}
-
-#define INLINE_COPY_FROM_USER
-#define INLINE_COPY_TO_USER
-/*
- * Copy a null terminated string from userspace.
- */
-
-static inline long __must_check
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
-	char *tmp;
-	if (!access_ok(VERIFY_READ, src, 1))
-		return -EFAULT;
-	strncpy(dst, (const char __force *)src, count);
-	for (tmp = dst; *tmp && count > 0; tmp++, count--) ;
-	return (tmp - dst);
-}
-
-/*
- * Get the size of a string in user space.
- *   src: The string to measure
- *     n: The maximum valid length
- *
- * Get the size of a NUL-terminated string in user space.
- *
- * Returns the size of the string INCLUDING the terminating NUL.
- * On exception, returns 0.
- * If the string is too long, returns a value greater than n.
- */
-static inline long __must_check strnlen_user(const char __user *src, long n)
-{
-	if (!access_ok(VERIFY_READ, src, 1))
-		return 0;
-	return strnlen((const char __force *)src, n) + 1;
-}
-
-/*
- * Zero Userspace
- */
-
-static inline unsigned long __must_check
-__clear_user(void __user *to, unsigned long n)
-{
-	if (!access_ok(VERIFY_WRITE, to, n))
-		return n;
-	memset((void __force *)to, 0, n);
-	return 0;
-}
-
-#define clear_user(to, n) __clear_user(to, n)
-
-/* How to interpret these return values:
- *	CORE:      can be accessed by core load or dma memcpy
- *	CORE_ONLY: can only be accessed by core load
- *	DMA:       can only be accessed by dma memcpy
- *	IDMA:      can only be accessed by interprocessor dma memcpy (BF561)
- *	ITEST:     can be accessed by isram memcpy or dma memcpy
- */
-enum {
-	BFIN_MEM_ACCESS_CORE = 0,
-	BFIN_MEM_ACCESS_CORE_ONLY,
-	BFIN_MEM_ACCESS_DMA,
-	BFIN_MEM_ACCESS_IDMA,
-	BFIN_MEM_ACCESS_ITEST,
-};
-/**
- *	bfin_mem_access_type() - what kind of memory access is required
- *	@addr:   the address to check
- *	@size:   number of bytes needed
- *	@return: <0 is error, >=0 is BFIN_MEM_ACCESS_xxx enum (see above)
- */
-int bfin_mem_access_type(unsigned long addr, unsigned long size);
-
-#endif				/* _BLACKFIN_UACCESS_H */