From c690eddc2f3b44b24520f4a77cc3a4c9bde7d571 Mon Sep 17 00:00:00 2001 From: Jesper Nilsson Date: Sun, 11 Mar 2018 11:05:23 +0100 Subject: CRIS: Drop support for the CRIS port The port was added back in 2000 so it's no longer even a good source of inspiration for newer ports (if it ever was) The last SoC (ARTPEC-3) with a CRIS main CPU was launched in 2008. Coupled with time and working developer board hardware being in low supply, it's time to drop the port from Linux. So long and thanks for all the fish! Signed-off-by: Jesper Nilsson Signed-off-by: Arnd Bergmann --- arch/cris/include/asm/uaccess.h | 361 ---------------------------------------- 1 file changed, 361 deletions(-) delete mode 100644 arch/cris/include/asm/uaccess.h (limited to 'arch/cris/include/asm/uaccess.h') diff --git a/arch/cris/include/asm/uaccess.h b/arch/cris/include/asm/uaccess.h deleted file mode 100644 index 3b42ab0cae93..000000000000 --- a/arch/cris/include/asm/uaccess.h +++ /dev/null @@ -1,361 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Authors: Bjorn Wesen (bjornw@axis.com) - * Hans-Peter Nilsson (hp@axis.com) - */ - -/* Asm:s have been tweaked (within the domain of correctness) to give - satisfactory results for "gcc version 2.96 20000427 (experimental)". - - Check regularly... - - Register $r9 is chosen for temporaries, being a call-clobbered register - first in line to be used (notably for local blocks), not colliding with - parameter registers. */ - -#ifndef _CRIS_UACCESS_H -#define _CRIS_UACCESS_H - -#include -#include - -/* - * 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) }) - -/* addr_limit is the maximum accessible address for the task. we misuse - * the KERNEL_DS and USER_DS values to both assign and compare the - * addr_limit values through the equally misnamed get/set_fs macros. - * (see above) - */ - -#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF) -#define USER_DS MAKE_MM_SEG(TASK_SIZE) - -#define get_ds() (KERNEL_DS) -#define get_fs() (current_thread_info()->addr_limit) -#define set_fs(x) (current_thread_info()->addr_limit = (x)) - -#define segment_eq(a, b) ((a).seg == (b).seg) - -#define __kernel_ok (uaccess_kernel()) -#define __user_ok(addr, size) \ - (((size) <= TASK_SIZE) && ((addr) <= TASK_SIZE-(size))) -#define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size))) -#define access_ok(type, addr, size) __access_ok((unsigned long)(addr), (size)) - -#include -#include - -/* - * 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 ugliness 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). - * - * As we use the same address space for kernel and user data on - * CRIS, we can just do these as direct assignments. (Of course, the - * exception handling means that it's no longer "just"...) - */ -#define get_user(x, ptr) \ - __get_user_check((x), (ptr), sizeof(*(ptr))) -#define put_user(x, ptr) \ - __put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr))) - -#define __get_user(x, ptr) \ - __get_user_nocheck((x), (ptr), sizeof(*(ptr))) -#define __put_user(x, ptr) \ - __put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr))) - -extern long __put_user_bad(void); - -#define __put_user_size(x, ptr, size, retval) \ -do { \ - retval = 0; \ - switch (size) { \ - case 1: \ - __put_user_asm(x, ptr, retval, "move.b"); \ - break; \ - case 2: \ - __put_user_asm(x, ptr, retval, "move.w"); \ - break; \ - case 4: \ - __put_user_asm(x, ptr, retval, "move.d"); \ - break; \ - case 8: \ - __put_user_asm_64(x, ptr, retval); \ - break; \ - default: \ - __put_user_bad(); \ - } \ -} while (0) - -#define __get_user_size(x, ptr, size, retval) \ -do { \ - retval = 0; \ - switch (size) { \ - case 1: \ - __get_user_asm(x, ptr, retval, "move.b"); \ - break; \ - case 2: \ - __get_user_asm(x, ptr, retval, "move.w"); \ - break; \ - case 4: \ - __get_user_asm(x, ptr, retval, "move.d"); \ - break; \ - case 8: \ - __get_user_asm_64(x, ptr, retval); \ - break; \ - default: \ - (x) = __get_user_bad(); \ - } \ -} while (0) - -#define __put_user_nocheck(x, ptr, size) \ -({ \ - long __pu_err; \ - __put_user_size((x), (ptr), (size), __pu_err); \ - __pu_err; \ -}) - -#define __put_user_check(x, ptr, size) \ -({ \ - long __pu_err = -EFAULT; \ - __typeof__(*(ptr)) *__pu_addr = (ptr); \ - if (access_ok(VERIFY_WRITE, __pu_addr, size)) \ - __put_user_size((x), __pu_addr, (size), __pu_err); \ - __pu_err; \ -}) - -struct __large_struct { unsigned long buf[100]; }; -#define __m(x) (*(struct __large_struct *)(x)) - - - -#define __get_user_nocheck(x, ptr, size) \ -({ \ - long __gu_err, __gu_val; \ - __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, __gu_val = 0; \ - const __typeof__(*(ptr)) *__gu_addr = (ptr); \ - 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); - -/* More complex functions. Most are inline, but some call functions that - live in lib/usercopy.c */ - -extern unsigned long __copy_user(void __user *to, const void *from, unsigned long n); -extern unsigned long __copy_user_in(void *to, const void __user *from, unsigned long n); -extern unsigned long __do_clear_user(void __user *to, unsigned long n); - -static inline long -strncpy_from_user(char *dst, const char __user *src, long count) -{ - long res = -EFAULT; - - if (access_ok(VERIFY_READ, src, 1)) - res = __do_strncpy_from_user(dst, src, count); - return res; -} - - -/* Note that these expand awfully if made into switch constructs, so - don't do that. */ - -static inline unsigned long -__constant_copy_from_user(void *to, const void __user *from, unsigned long n) -{ - unsigned long ret = 0; - - if (n == 0) - ; - else if (n == 1) - __asm_copy_from_user_1(to, from, ret); - else if (n == 2) - __asm_copy_from_user_2(to, from, ret); - else if (n == 3) - __asm_copy_from_user_3(to, from, ret); - else if (n == 4) - __asm_copy_from_user_4(to, from, ret); - else if (n == 5) - __asm_copy_from_user_5(to, from, ret); - else if (n == 6) - __asm_copy_from_user_6(to, from, ret); - else if (n == 7) - __asm_copy_from_user_7(to, from, ret); - else if (n == 8) - __asm_copy_from_user_8(to, from, ret); - else if (n == 9) - __asm_copy_from_user_9(to, from, ret); - else if (n == 10) - __asm_copy_from_user_10(to, from, ret); - else if (n == 11) - __asm_copy_from_user_11(to, from, ret); - else if (n == 12) - __asm_copy_from_user_12(to, from, ret); - else if (n == 13) - __asm_copy_from_user_13(to, from, ret); - else if (n == 14) - __asm_copy_from_user_14(to, from, ret); - else if (n == 15) - __asm_copy_from_user_15(to, from, ret); - else if (n == 16) - __asm_copy_from_user_16(to, from, ret); - else if (n == 20) - __asm_copy_from_user_20(to, from, ret); - else if (n == 24) - __asm_copy_from_user_24(to, from, ret); - else - ret = __copy_user_in(to, from, n); - - return ret; -} - -/* Ditto, don't make a switch out of this. */ - -static inline unsigned long -__constant_copy_to_user(void __user *to, const void *from, unsigned long n) -{ - unsigned long ret = 0; - - if (n == 0) - ; - else if (n == 1) - __asm_copy_to_user_1(to, from, ret); - else if (n == 2) - __asm_copy_to_user_2(to, from, ret); - else if (n == 3) - __asm_copy_to_user_3(to, from, ret); - else if (n == 4) - __asm_copy_to_user_4(to, from, ret); - else if (n == 5) - __asm_copy_to_user_5(to, from, ret); - else if (n == 6) - __asm_copy_to_user_6(to, from, ret); - else if (n == 7) - __asm_copy_to_user_7(to, from, ret); - else if (n == 8) - __asm_copy_to_user_8(to, from, ret); - else if (n == 9) - __asm_copy_to_user_9(to, from, ret); - else if (n == 10) - __asm_copy_to_user_10(to, from, ret); - else if (n == 11) - __asm_copy_to_user_11(to, from, ret); - else if (n == 12) - __asm_copy_to_user_12(to, from, ret); - else if (n == 13) - __asm_copy_to_user_13(to, from, ret); - else if (n == 14) - __asm_copy_to_user_14(to, from, ret); - else if (n == 15) - __asm_copy_to_user_15(to, from, ret); - else if (n == 16) - __asm_copy_to_user_16(to, from, ret); - else if (n == 20) - __asm_copy_to_user_20(to, from, ret); - else if (n == 24) - __asm_copy_to_user_24(to, from, ret); - else - ret = __copy_user(to, from, n); - - return ret; -} - -/* No switch, please. */ - -static inline unsigned long -__constant_clear_user(void __user *to, unsigned long n) -{ - unsigned long ret = 0; - - if (n == 0) - ; - else if (n == 1) - __asm_clear_1(to, ret); - else if (n == 2) - __asm_clear_2(to, ret); - else if (n == 3) - __asm_clear_3(to, ret); - else if (n == 4) - __asm_clear_4(to, ret); - else if (n == 8) - __asm_clear_8(to, ret); - else if (n == 12) - __asm_clear_12(to, ret); - else if (n == 16) - __asm_clear_16(to, ret); - else if (n == 20) - __asm_clear_20(to, ret); - else if (n == 24) - __asm_clear_24(to, ret); - else - ret = __do_clear_user(to, n); - - return ret; -} - - -static inline size_t clear_user(void __user *to, size_t n) -{ - if (unlikely(!access_ok(VERIFY_WRITE, to, n))) - return n; - if (__builtin_constant_p(n)) - return __constant_clear_user(to, n); - else - return __do_clear_user(to, n); -} - -static inline unsigned long -raw_copy_from_user(void *to, const void __user *from, unsigned long n) -{ - if (__builtin_constant_p(n)) - return __constant_copy_from_user(to, from, n); - else - return __copy_user_in(to, from, n); -} - -static inline unsigned long -raw_copy_to_user(void __user *to, const void *from, unsigned long n) -{ - if (__builtin_constant_p(n)) - return __constant_copy_to_user(to, from, n); - else - return __copy_user(to, from, n); -} - -#define INLINE_COPY_FROM_USER -#define INLINE_COPY_TO_USER - -static inline unsigned long -__clear_user(void __user *to, unsigned long n) -{ - return __do_clear_user(to, n); -} - -#endif /* _CRIS_UACCESS_H */ -- cgit v1.2.3