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Diffstat (limited to 'include/asm-v850/uaccess.h')
| -rw-r--r-- | include/asm-v850/uaccess.h | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/include/asm-v850/uaccess.h b/include/asm-v850/uaccess.h deleted file mode 100644 index 64563c409bb..00000000000 --- a/include/asm-v850/uaccess.h +++ /dev/null @@ -1,159 +0,0 @@ -#ifndef __V850_UACCESS_H__ -#define __V850_UACCESS_H__ - -/* - * User space memory access functions - */ - -#include <linux/errno.h> -#include <linux/string.h> - -#include <asm/segment.h> -#include <asm/machdep.h> - -#define VERIFY_READ 0 -#define VERIFY_WRITE 1 - -static inline int access_ok (int type, const void *addr, unsigned long size) -{ - /* XXX I guess we should check against real ram bounds at least, and - possibly make sure ADDR is not within the kernel. - For now we just check to make sure it's not a small positive - or negative value, as that will at least catch some kinds of - error. In particular, we make sure that ADDR's not within the - interrupt vector area, which we know starts at zero, or within the - peripheral-I/O area, which is located just _before_ zero. */ - unsigned long val = (unsigned long)addr; - return val >= (0x80 + NUM_CPU_IRQS*16) && val < 0xFFFFF000; -} - -/* - * 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; -}; - -/* Returns 0 if exception not found and fixup otherwise. */ -extern unsigned long search_exception_table (unsigned long); - - -/* - * These are the main single-value transfer routines. They automatically - * use the right size if we just have the right pointer type. - */ - -extern int bad_user_access_length (void); - -#define __get_user(var, ptr) \ - ({ \ - int __gu_err = 0; \ - typeof(*(ptr)) __gu_val = 0; \ - switch (sizeof (*(ptr))) { \ - case 1: \ - case 2: \ - case 4: \ - __gu_val = *(ptr); \ - break; \ - case 8: \ - memcpy(&__gu_val, ptr, sizeof(__gu_val)); \ - break; \ - default: \ - __gu_val = 0; \ - __gu_err = __get_user_bad (); \ - break; \ - } \ - (var) = __gu_val; \ - __gu_err; \ - }) -#define __get_user_bad() (bad_user_access_length (), (-EFAULT)) - -#define __put_user(var, ptr) \ - ({ \ - int __pu_err = 0; \ - switch (sizeof (*(ptr))) { \ - case 1: \ - case 2: \ - case 4: \ - *(ptr) = (var); \ - break; \ - case 8: { \ - typeof(*(ptr)) __pu_val = 0; \ - memcpy(ptr, &__pu_val, sizeof(__pu_val)); \ - } \ - break; \ - default: \ - __pu_err = __put_user_bad (); \ - break; \ - } \ - __pu_err; \ - }) -#define __put_user_bad() (bad_user_access_length (), (-EFAULT)) - -#define put_user(x, ptr) __put_user(x, ptr) -#define get_user(x, ptr) __get_user(x, ptr) - -#define __copy_from_user(to, from, n) (memcpy (to, from, n), 0) -#define __copy_to_user(to, from, n) (memcpy(to, from, n), 0) - -#define __copy_to_user_inatomic __copy_to_user -#define __copy_from_user_inatomic __copy_from_user - -#define copy_from_user(to, from, n) __copy_from_user (to, from, n) -#define copy_to_user(to, from, n) __copy_to_user(to, from, n) - -#define copy_to_user_ret(to,from,n,retval) \ - ({ if (copy_to_user (to,from,n)) return retval; }) - -#define copy_from_user_ret(to,from,n,retval) \ - ({ if (copy_from_user (to,from,n)) return retval; }) - -/* - * Copy a null terminated string from userspace. - */ - -static inline long -strncpy_from_user (char *dst, const char *src, long count) -{ - char *tmp; - strncpy (dst, src, count); - for (tmp = dst; *tmp && count > 0; tmp++, count--) - ; - return tmp - dst; -} - -/* - * Return the size of a string (including the ending 0) - * - * Return 0 on exception, a value greater than N if too long - */ -static inline long strnlen_user (const char *src, long n) -{ - return strlen (src) + 1; -} - -#define strlen_user(str) strnlen_user (str, 32767) - -/* - * Zero Userspace - */ - -static inline unsigned long -clear_user (void *to, unsigned long n) -{ - memset (to, 0, n); - return 0; -} - -#endif /* __V850_UACCESS_H__ */ |