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Diffstat (limited to 'arch/m32r/include/asm/uaccess.h')
-rw-r--r--arch/m32r/include/asm/uaccess.h189
1 files changed, 9 insertions, 180 deletions
diff --git a/arch/m32r/include/asm/uaccess.h b/arch/m32r/include/asm/uaccess.h
index 6f8982157a75..07be349c00ad 100644
--- a/arch/m32r/include/asm/uaccess.h
+++ b/arch/m32r/include/asm/uaccess.h
@@ -11,13 +11,9 @@
/*
* User space memory access functions
*/
-#include <linux/errno.h>
-#include <linux/thread_info.h>
#include <asm/page.h>
#include <asm/setup.h>
-
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
+#include <linux/prefetch.h>
/*
* The fs value determines whether argument validity checking should be
@@ -114,25 +110,7 @@ static inline int access_ok(int type, const void *addr, unsigned long size)
}
#endif /* CONFIG_MMU */
-/*
- * 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);
+#include <asm/extable.h>
/*
* These are the main single-value transfer routines. They automatically
@@ -483,174 +461,25 @@ do { \
: "r14", "memory"); \
} while (0)
-#define __copy_user_zeroing(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: ldi r14, #0 ; store zero \n" \
- " .fillinsn\n" \
- "8: addi %2, #-1\n" \
- " stb r14, @%0 ; ACE? \n" \
- " addi %0, #1\n" \
- " bnez %2, 8b\n" \
- " 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,7b\n" \
- " .long 3b,7b\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 __generic_copy_from_user_nocheck(void *to,
- const void __user *from, unsigned long n)
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
- __copy_user_zeroing(to, from, n);
+ prefetchw(to);
+ __copy_user(to, from, n);
return n;
}
-static inline unsigned long __generic_copy_to_user_nocheck(void __user *to,
- const void *from, unsigned long 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;
}
-unsigned long __generic_copy_to_user(void __user *, const void *, unsigned long);
-unsigned long __generic_copy_from_user(void *, const void __user *, unsigned long);
-
-/**
- * __copy_to_user: - Copy a block of data into user space, with less checking.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from kernel space to user space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define __copy_to_user(to, from, n) \
- __generic_copy_to_user_nocheck((to), (from), (n))
-
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
-
-/**
- * copy_to_user: - Copy a block of data into user space.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from kernel space to user space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define copy_to_user(to, from, n) \
-({ \
- might_fault(); \
- __generic_copy_to_user((to), (from), (n)); \
-})
-
-/**
- * __copy_from_user: - Copy a block of data from user space, with less checking. * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from user space to kernel space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-#define __copy_from_user(to, from, n) \
- __generic_copy_from_user_nocheck((to), (from), (n))
-
-/**
- * copy_from_user: - Copy a block of data from user space.
- * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from user space to kernel space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-#define copy_from_user(to, from, n) \
-({ \
- might_fault(); \
- __generic_copy_from_user((to), (from), (n)); \
-})
-
long __must_check strncpy_from_user(char *dst, const char __user *src,
long count);
long __must_check __strncpy_from_user(char *dst,
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-30 13:33:15 +0300