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Diffstat (limited to 'include/asm-blackfin/uaccess.h')
| -rw-r--r-- | include/asm-blackfin/uaccess.h | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/include/asm-blackfin/uaccess.h b/include/asm-blackfin/uaccess.h deleted file mode 100644 index 6e913bb..0000000 --- a/include/asm-blackfin/uaccess.h +++ /dev/null @@ -1,205 +0,0 @@ -/* - * U-boot - uaccess.h - * - * Copyright (c) 2005-2007 Analog Devices Inc. - * - * This file is based on - * Based on: include/asm-m68knommu/uaccess.h - * Changes made by Lineo Inc. May 2001 - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, - * MA 02110-1301 USA - */ - -#ifndef __BLACKFIN_UACCESS_H -#define __BLACKFIN_UACCESS_H - -/* - * User space memory access functions - */ -#include <asm/segment.h> -#include <asm/errno.h> - -#define VERIFY_READ 0 -#define VERIFY_WRITE 1 - -/* We let the MMU do all checking */ -static inline int access_ok(int type, const void *addr, unsigned long size) -{ - return ((unsigned long)addr < 0x10f00000); /* need final decision - Tony */ -} - -static inline int verify_area(int type, const void *addr, unsigned long size) -{ - return access_ok(type, addr, size) ? 0 : -EFAULT; -} - -/* - * 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. - */ - -#define put_user(x, ptr) \ -({ \ - int __pu_err = 0; \ - typeof(*(ptr)) __pu_val = (x); \ - switch (sizeof (*(ptr))) { \ - case 1: \ - __put_user_asm(__pu_err, __pu_val, ptr, B); \ - break; \ - case 2: \ - __put_user_asm(__pu_err, __pu_val, ptr, W); \ - break; \ - case 4: \ - __put_user_asm(__pu_err, __pu_val, ptr, ); \ - break; \ - default: \ - __pu_err = __put_user_bad(); \ - break; \ - } \ - __pu_err; \ -}) -/* - * [pregs] = dregs ==> 32bits - * H[pregs] = dregs ==> 16bits - * B[pregs] = dregs ==> 8 bits - */ - -#define __put_user(x, ptr) put_user(x, ptr) - -static inline int bad_user_access_length(void) -{ - panic("bad_user_access_length"); - return -1; -} - -#define __put_user_bad() (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 *)(x)) - -#define __put_user_asm(err,x,ptr,bhw) \ - __asm__ (#bhw"[%1] = %0;\n\t" \ - : /* no outputs */ \ - :"d" (x),"a" (__ptr(ptr)) : "memory") - -#define get_user(x, ptr) \ -({ \ - int __gu_err = 0; \ - typeof(*(ptr)) __gu_val = 0; \ - switch (sizeof(*(ptr))) { \ - case 1: \ - __get_user_asm(__gu_err, __gu_val, ptr, B, "=d",(Z)); \ - break; \ - case 2: \ - __get_user_asm(__gu_err, __gu_val, ptr, W, "=r",(Z)); \ - break; \ - case 4: \ - __get_user_asm(__gu_err, __gu_val, ptr, , "=r",); \ - break; \ - default: \ - __gu_val = 0; \ - __gu_err = __get_user_bad(); \ - break; \ - } \ - (x) = __gu_val; \ - __gu_err; \ -}) - -/* dregs = [pregs] ==> 32bits - * H[pregs] ==> 16bits - * B[pregs] ==> 8 bits - */ - -#define __get_user(x, ptr) get_user(x, ptr) -#define __get_user_bad() (bad_user_access_length(), (-EFAULT)) - -#define __get_user_asm(err,x,ptr,bhw,reg,option) \ - __asm__ ("%0 =" #bhw "[%1]"#option";\n\t" \ - : "=d" (x) \ - : "a" (__ptr(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_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); /* DAVIDM should we count a NUL ? check getname */ -} - -/* - * 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); /* DAVIDM make safer */ -} - -#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 |