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Diffstat (limited to 'arch/m32r/include/asm/uaccess.h')
-rw-r--r--arch/m32r/include/asm/uaccess.h515
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diff --git a/arch/m32r/include/asm/uaccess.h b/arch/m32r/include/asm/uaccess.h
deleted file mode 100644
index 9d89bc3d8181..000000000000
--- a/arch/m32r/include/asm/uaccess.h
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@@ -1,515 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_M32R_UACCESS_H
-#define _ASM_M32R_UACCESS_H
-
-/*
- * linux/include/asm-m32r/uaccess.h
- *
- * M32R version.
- * Copyright (C) 2004, 2006 Hirokazu Takata <takata at linux-m32r.org>
- */
-
-/*
- * User space memory access functions
- */
-#include <asm/page.h>
-#include <asm/setup.h>
-#include <linux/prefetch.h>
-
-/*
- * 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, these macros are grossly misnamed.
- */
-
-#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
-
-#ifdef CONFIG_MMU
-
-#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
-#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
-#define get_ds() (KERNEL_DS)
-#define get_fs() (current_thread_info()->addr_limit)
-#define set_fs(x) (current_thread_info()->addr_limit = (x))
-
-#else /* not CONFIG_MMU */
-
-#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
-#define USER_DS MAKE_MM_SEG(0xFFFFFFFF)
-#define get_ds() (KERNEL_DS)
-
-static inline mm_segment_t get_fs(void)
-{
- return USER_DS;
-}
-
-static inline void set_fs(mm_segment_t s)
-{
-}
-
-#endif /* not CONFIG_MMU */
-
-#define segment_eq(a, b) ((a).seg == (b).seg)
-
-#define __addr_ok(addr) \
- ((unsigned long)(addr) < (current_thread_info()->addr_limit.seg))
-
-/*
- * Test whether a block of memory is a valid user space address.
- * Returns 0 if the range is valid, nonzero otherwise.
- *
- * This is equivalent to the following test:
- * (u33)addr + (u33)size >= (u33)current->addr_limit.seg
- *
- * This needs 33-bit arithmetic. We have a carry...
- */
-#define __range_ok(addr, size) ({ \
- unsigned long flag, roksum; \
- __chk_user_ptr(addr); \
- asm ( \
- " cmpu %1, %1 ; clear cbit\n" \
- " addx %1, %3 ; set cbit if overflow\n" \
- " subx %0, %0\n" \
- " cmpu %4, %1\n" \
- " subx %0, %5\n" \
- : "=&r" (flag), "=r" (roksum) \
- : "1" (addr), "r" ((int)(size)), \
- "r" (current_thread_info()->addr_limit.seg), "r" (0) \
- : "cbit" ); \
- flag; })
-
-/**
- * access_ok: - Checks if a user space pointer is valid
- * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE. Note that
- * %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe
- * to write to a block, it is always safe to read from it.
- * @addr: User space pointer to start of block to check
- * @size: Size of block to check
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Checks if a pointer to a block of memory in user space is valid.
- *
- * Returns true (nonzero) if the memory block may be valid, false (zero)
- * if it is definitely invalid.
- *
- * Note that, depending on architecture, this function probably just
- * checks that the pointer is in the user space range - after calling
- * this function, memory access functions may still return -EFAULT.
- */
-#ifdef CONFIG_MMU
-#define access_ok(type, addr, size) (likely(__range_ok(addr, size) == 0))
-#else
-static inline int access_ok(int type, const void *addr, unsigned long size)
-{
- unsigned long val = (unsigned long)addr;
-
- return ((val >= memory_start) && ((val + size) < memory_end));
-}
-#endif /* CONFIG_MMU */
-
-#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.
- *
- * This gets kind of ugly. We want to return _two_ values in "get_user()"
- * and yet we don't want to do any pointers, because that is too much
- * of a performance impact. Thus we have a few rather ugly macros here,
- * and hide all the uglyness from the user.
- *
- * The "__xxx" versions of the user access functions are versions that
- * do not verify the address space, that must have been done previously
- * with a separate "access_ok()" call (this is used when we do multiple
- * accesses to the same area of user memory).
- */
-
-/* Careful: we have to cast the result to the type of the pointer for sign
- reasons */
-/**
- * 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.
- * @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((__typeof__(*(ptr)))(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)))
-
-#define __get_user_nocheck(x, ptr, size) \
-({ \
- long __gu_err = 0; \
- unsigned long __gu_val = 0; \
- might_fault(); \
- __get_user_size(__gu_val, (ptr), (size), __gu_err); \
- (x) = (__force __typeof__(*(ptr)))__gu_val; \
- __gu_err; \
-})
-
-#define __get_user_check(x, ptr, size) \
-({ \
- long __gu_err = -EFAULT; \
- unsigned long __gu_val = 0; \
- const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
- might_fault(); \
- if (access_ok(VERIFY_READ, __gu_addr, size)) \
- __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
- (x) = (__force __typeof__(*(ptr)))__gu_val; \
- __gu_err; \
-})
-
-extern long __get_user_bad(void);
-
-#define __get_user_size(x, ptr, size, retval) \
-do { \
- retval = 0; \
- __chk_user_ptr(ptr); \
- switch (size) { \
- case 1: __get_user_asm(x, ptr, retval, "ub"); break; \
- case 2: __get_user_asm(x, ptr, retval, "uh"); break; \
- case 4: __get_user_asm(x, ptr, retval, ""); break; \
- default: (x) = __get_user_bad(); \
- } \
-} while (0)
-
-#define __get_user_asm(x, addr, err, itype) \
- __asm__ __volatile__( \
- " .fillinsn\n" \
- "1: ld"itype" %1,@%2\n" \
- " .fillinsn\n" \
- "2:\n" \
- ".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" \
- : "=&r" (err), "=&r" (x) \
- : "r" (addr), "i" (-EFAULT), "0" (err) \
- : "r14", "memory")
-
-/**
- * __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((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-
-
-#define __put_user_nocheck(x, ptr, size) \
-({ \
- long __pu_err; \
- might_fault(); \
- __put_user_size((x), (ptr), (size), __pu_err); \
- __pu_err; \
-})
-
-
-#define __put_user_check(x, ptr, size) \
-({ \
- long __pu_err = -EFAULT; \
- __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
- might_fault(); \
- if (access_ok(VERIFY_WRITE, __pu_addr, size)) \
- __put_user_size((x), __pu_addr, (size), __pu_err); \
- __pu_err; \
-})
-
-#if defined(__LITTLE_ENDIAN__)
-#define __put_user_u64(x, addr, err) \
- __asm__ __volatile__( \
- " .fillinsn\n" \
- "1: st %L1,@%2\n" \
- " .fillinsn\n" \
- "2: st %H1,@(4,%2)\n" \
- " .fillinsn\n" \
- "3:\n" \
- ".section .fixup,\"ax\"\n" \
- " .balign 4\n" \
- "4: ldi %0,%3\n" \
- " seth r14,#high(3b)\n" \
- " or3 r14,r14,#low(3b)\n" \
- " jmp r14\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 1b,4b\n" \
- " .long 2b,4b\n" \
- ".previous" \
- : "=&r" (err) \
- : "r" (x), "r" (addr), "i" (-EFAULT), "0" (err) \
- : "r14", "memory")
-
-#elif defined(__BIG_ENDIAN__)
-#define __put_user_u64(x, addr, err) \
- __asm__ __volatile__( \
- " .fillinsn\n" \
- "1: st %H1,@%2\n" \
- " .fillinsn\n" \
- "2: st %L1,@(4,%2)\n" \
- " .fillinsn\n" \
- "3:\n" \
- ".section .fixup,\"ax\"\n" \
- " .balign 4\n" \
- "4: ldi %0,%3\n" \
- " seth r14,#high(3b)\n" \
- " or3 r14,r14,#low(3b)\n" \
- " jmp r14\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 1b,4b\n" \
- " .long 2b,4b\n" \
- ".previous" \
- : "=&r" (err) \
- : "r" (x), "r" (addr), "i" (-EFAULT), "0" (err) \
- : "r14", "memory")
-#else
-#error no endian defined
-#endif
-
-extern void __put_user_bad(void);
-
-#define __put_user_size(x, ptr, size, retval) \
-do { \
- retval = 0; \
- __chk_user_ptr(ptr); \
- switch (size) { \
- case 1: __put_user_asm(x, ptr, retval, "b"); break; \
- case 2: __put_user_asm(x, ptr, retval, "h"); break; \
- case 4: __put_user_asm(x, ptr, retval, ""); break; \
- case 8: __put_user_u64((__typeof__(*ptr))(x), ptr, retval); break;\
- default: __put_user_bad(); \
- } \
-} while (0)
-
-struct __large_struct { unsigned long buf[100]; };
-#define __m(x) (*(struct __large_struct *)(x))
-
-/*
- * 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 __put_user_asm(x, addr, err, itype) \
- __asm__ __volatile__( \
- " .fillinsn\n" \
- "1: st"itype" %1,@%2\n" \
- " .fillinsn\n" \
- "2:\n" \
- ".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" \
- : "=&r" (err) \
- : "r" (x), "r" (addr), "i" (-EFAULT), "0" (err) \
- : "r14", "memory")
-
-/*
- * Here we special-case 1, 2 and 4-byte copy_*_user invocations. On a fault
- * we return the initial request size (1, 2 or 4), as copy_*_user should do.
- * If a store crosses a page boundary and gets a fault, the m32r will not write
- * anything, so this is accurate.
- */
-
-/*
- * Copy To/From Userspace
- */
-
-/* Generic arbitrary sized copy. */
-/* Return the number of bytes NOT copied. */
-#define __copy_user(to, from, size) \
-do { \
- unsigned long __dst, __src, __c; \
- __asm__ __volatile__ ( \
- " mv r14, %0\n" \
- " or r14, %1\n" \
- " beq %0, %1, 9f\n" \
- " beqz %2, 9f\n" \
- " and3 r14, r14, #3\n" \
- " bnez r14, 2f\n" \
- " and3 %2, %2, #3\n" \
- " beqz %3, 2f\n" \
- " addi %0, #-4 ; word_copy \n" \
- " .fillinsn\n" \
- "0: ld r14, @%1+\n" \
- " addi %3, #-1\n" \
- " .fillinsn\n" \
- "1: st r14, @+%0\n" \
- " bnez %3, 0b\n" \
- " beqz %2, 9f\n" \
- " addi %0, #4\n" \
- " .fillinsn\n" \
- "2: ldb r14, @%1 ; byte_copy \n" \
- " .fillinsn\n" \
- "3: stb r14, @%0\n" \
- " addi %1, #1\n" \
- " addi %2, #-1\n" \
- " addi %0, #1\n" \
- " bnez %2, 2b\n" \
- " .fillinsn\n" \
- "9:\n" \
- ".section .fixup,\"ax\"\n" \
- " .balign 4\n" \
- "5: addi %3, #1\n" \
- " addi %1, #-4\n" \
- " .fillinsn\n" \
- "6: slli %3, #2\n" \
- " add %2, %3\n" \
- " addi %0, #4\n" \
- " .fillinsn\n" \
- "7: seth r14, #high(9b)\n" \
- " or3 r14, r14, #low(9b)\n" \
- " jmp r14\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,6b\n" \
- " .long 1b,5b\n" \
- " .long 2b,9b\n" \
- " .long 3b,9b\n" \
- ".previous\n" \
- : "=&r" (__dst), "=&r" (__src), "=&r" (size), \
- "=&r" (__c) \
- : "0" (to), "1" (from), "2" (size), "3" (size / 4) \
- : "r14", "memory"); \
-} while (0)
-
-/* We let the __ versions of copy_from/to_user inline, because they're often
- * used in fast paths and have only a small space overhead.
- */
-static inline unsigned long
-raw_copy_from_user(void *to, const void __user *from, unsigned long n)
-{
- prefetchw(to);
- __copy_user(to, from, n);
- return n;
-}
-
-static inline unsigned long
-raw_copy_to_user(void __user *to, const void *from, unsigned long n)
-{
- prefetch(from);
- __copy_user(to, from, n);
- return n;
-}
-
-long __must_check strncpy_from_user(char *dst, const char __user *src,
- long count);
-
-/**
- * __clear_user: - Zero a block of memory in user space, with less checking.
- * @to: Destination address, in user space.
- * @n: Number of bytes to zero.
- *
- * Zero a block of memory in user space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be cleared.
- * On success, this will be zero.
- */
-unsigned long __clear_user(void __user *mem, unsigned long len);
-
-/**
- * clear_user: - Zero a block of memory in user space.
- * @to: Destination address, in user space.
- * @n: Number of bytes to zero.
- *
- * Zero a block of memory in user space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be cleared.
- * On success, this will be zero.
- */
-unsigned long clear_user(void __user *mem, unsigned long len);
-
-long strnlen_user(const char __user *str, long n);
-
-#endif /* _ASM_M32R_UACCESS_H */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-26 11:08:36 +0300