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Diffstat (limited to 'arch/nds32/include/asm/uaccess.h')
-rw-r--r--arch/nds32/include/asm/uaccess.h286
1 files changed, 0 insertions, 286 deletions
diff --git a/arch/nds32/include/asm/uaccess.h b/arch/nds32/include/asm/uaccess.h
deleted file mode 100644
index d4cbf069dc22..000000000000
--- a/arch/nds32/include/asm/uaccess.h
+++ /dev/null
@@ -1,286 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#ifndef _ASMANDES_UACCESS_H
-#define _ASMANDES_UACCESS_H
-
-/*
- * User space memory access functions
- */
-#include <linux/sched.h>
-#include <asm/errno.h>
-#include <asm/memory.h>
-#include <asm/types.h>
-
-#define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t"
-
-/*
- * The exception table consists of pairs of addresses: the first is the
- * address of an instruction that is allowed to fault, and the second is
- * the address at which the program should continue. No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path. This means when everything is well,
- * we don't even have to jump over them. Further, they do not intrude
- * on our cache or tlb entries.
- */
-
-struct exception_table_entry {
- unsigned long insn, fixup;
-};
-
-extern int fixup_exception(struct pt_regs *regs);
-
-#define KERNEL_DS ((mm_segment_t) { ~0UL })
-#define USER_DS ((mm_segment_t) {TASK_SIZE - 1})
-
-#define get_fs() (current_thread_info()->addr_limit)
-#define user_addr_max get_fs
-
-static inline void set_fs(mm_segment_t fs)
-{
- current_thread_info()->addr_limit = fs;
-}
-
-#define uaccess_kernel() (get_fs() == KERNEL_DS)
-
-#define __range_ok(addr, size) (size <= get_fs() && addr <= (get_fs() -size))
-
-#define access_ok(addr, size) \
- __range_ok((unsigned long)addr, (unsigned long)size)
-/*
- * Single-value transfer routines. They automatically use the right
- * size if we just have the right pointer type. Note that the functions
- * which read from user space (*get_*) need to take care not to leak
- * kernel data even if the calling code is buggy and fails to check
- * the return value. This means zeroing out the destination variable
- * or buffer on error. Normally this is done out of line by the
- * fixup code, but there are a few places where it intrudes on the
- * main code path. When we only write to user space, there is no
- * problem.
- *
- * The "__xxx" versions of the user access functions do not verify the
- * address space - it must have been done previously with a separate
- * "access_ok()" call.
- *
- * The "xxx_error" versions set the third argument to EFAULT if an
- * error occurs, and leave it unchanged on success. Note that these
- * versions are void (ie, don't return a value as such).
- */
-
-#define get_user __get_user \
-
-#define __get_user(x, ptr) \
-({ \
- long __gu_err = 0; \
- __get_user_check((x), (ptr), __gu_err); \
- __gu_err; \
-})
-
-#define __get_user_error(x, ptr, err) \
-({ \
- __get_user_check((x), (ptr), (err)); \
- (void)0; \
-})
-
-#define __get_user_check(x, ptr, err) \
-({ \
- const __typeof__(*(ptr)) __user *__p = (ptr); \
- might_fault(); \
- if (access_ok(__p, sizeof(*__p))) { \
- __get_user_err((x), __p, (err)); \
- } else { \
- (x) = 0; (err) = -EFAULT; \
- } \
-})
-
-#define __get_user_err(x, ptr, err) \
-do { \
- unsigned long __gu_val; \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- __get_user_asm("lbi", __gu_val, (ptr), (err)); \
- break; \
- case 2: \
- __get_user_asm("lhi", __gu_val, (ptr), (err)); \
- break; \
- case 4: \
- __get_user_asm("lwi", __gu_val, (ptr), (err)); \
- break; \
- case 8: \
- __get_user_asm_dword(__gu_val, (ptr), (err)); \
- break; \
- default: \
- BUILD_BUG(); \
- break; \
- } \
- (x) = (__force __typeof__(*(ptr)))__gu_val; \
-} while (0)
-
-#define __get_user_asm(inst, x, addr, err) \
- __asm__ __volatile__ ( \
- "1: "inst" %1,[%2]\n" \
- "2:\n" \
- " .section .fixup,\"ax\"\n" \
- " .align 2\n" \
- "3: move %0, %3\n" \
- " move %1, #0\n" \
- " b 2b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .align 3\n" \
- " .long 1b, 3b\n" \
- " .previous" \
- : "+r" (err), "=&r" (x) \
- : "r" (addr), "i" (-EFAULT) \
- : "cc")
-
-#ifdef __NDS32_EB__
-#define __gu_reg_oper0 "%H1"
-#define __gu_reg_oper1 "%L1"
-#else
-#define __gu_reg_oper0 "%L1"
-#define __gu_reg_oper1 "%H1"
-#endif
-
-#define __get_user_asm_dword(x, addr, err) \
- __asm__ __volatile__ ( \
- "\n1:\tlwi " __gu_reg_oper0 ",[%2]\n" \
- "\n2:\tlwi " __gu_reg_oper1 ",[%2+4]\n" \
- "3:\n" \
- " .section .fixup,\"ax\"\n" \
- " .align 2\n" \
- "4: move %0, %3\n" \
- " b 3b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .align 3\n" \
- " .long 1b, 4b\n" \
- " .long 2b, 4b\n" \
- " .previous" \
- : "+r"(err), "=&r"(x) \
- : "r"(addr), "i"(-EFAULT) \
- : "cc")
-
-#define put_user __put_user \
-
-#define __put_user(x, ptr) \
-({ \
- long __pu_err = 0; \
- __put_user_err((x), (ptr), __pu_err); \
- __pu_err; \
-})
-
-#define __put_user_error(x, ptr, err) \
-({ \
- __put_user_err((x), (ptr), (err)); \
- (void)0; \
-})
-
-#define __put_user_check(x, ptr, err) \
-({ \
- __typeof__(*(ptr)) __user *__p = (ptr); \
- might_fault(); \
- if (access_ok(__p, sizeof(*__p))) { \
- __put_user_err((x), __p, (err)); \
- } else { \
- (err) = -EFAULT; \
- } \
-})
-
-#define __put_user_err(x, ptr, err) \
-do { \
- __typeof__(*(ptr)) __pu_val = (x); \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- __put_user_asm("sbi", __pu_val, (ptr), (err)); \
- break; \
- case 2: \
- __put_user_asm("shi", __pu_val, (ptr), (err)); \
- break; \
- case 4: \
- __put_user_asm("swi", __pu_val, (ptr), (err)); \
- break; \
- case 8: \
- __put_user_asm_dword(__pu_val, (ptr), (err)); \
- break; \
- default: \
- BUILD_BUG(); \
- break; \
- } \
-} while (0)
-
-#define __put_user_asm(inst, x, addr, err) \
- __asm__ __volatile__ ( \
- "1: "inst" %1,[%2]\n" \
- "2:\n" \
- " .section .fixup,\"ax\"\n" \
- " .align 2\n" \
- "3: move %0, %3\n" \
- " b 2b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .align 3\n" \
- " .long 1b, 3b\n" \
- " .previous" \
- : "+r" (err) \
- : "r" (x), "r" (addr), "i" (-EFAULT) \
- : "cc")
-
-#ifdef __NDS32_EB__
-#define __pu_reg_oper0 "%H2"
-#define __pu_reg_oper1 "%L2"
-#else
-#define __pu_reg_oper0 "%L2"
-#define __pu_reg_oper1 "%H2"
-#endif
-
-#define __put_user_asm_dword(x, addr, err) \
- __asm__ __volatile__ ( \
- "\n1:\tswi " __pu_reg_oper0 ",[%1]\n" \
- "\n2:\tswi " __pu_reg_oper1 ",[%1+4]\n" \
- "3:\n" \
- " .section .fixup,\"ax\"\n" \
- " .align 2\n" \
- "4: move %0, %3\n" \
- " b 3b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .align 3\n" \
- " .long 1b, 4b\n" \
- " .long 2b, 4b\n" \
- " .previous" \
- : "+r"(err) \
- : "r"(addr), "r"(x), "i"(-EFAULT) \
- : "cc")
-
-extern unsigned long __arch_clear_user(void __user * addr, unsigned long n);
-extern long strncpy_from_user(char *dest, const char __user * src, long count);
-extern __must_check long strnlen_user(const char __user * str, long n);
-extern unsigned long __arch_copy_from_user(void *to, const void __user * from,
- unsigned long n);
-extern unsigned long __arch_copy_to_user(void __user * to, const void *from,
- unsigned long n);
-
-#define raw_copy_from_user __arch_copy_from_user
-#define raw_copy_to_user __arch_copy_to_user
-
-#define INLINE_COPY_FROM_USER
-#define INLINE_COPY_TO_USER
-static inline unsigned long clear_user(void __user * to, unsigned long n)
-{
- if (access_ok(to, n))
- n = __arch_clear_user(to, n);
- return n;
-}
-
-static inline unsigned long __clear_user(void __user * to, unsigned long n)
-{
- return __arch_clear_user(to, n);
-}
-
-#endif /* _ASMNDS32_UACCESS_H */
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