/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2011 Texas Instruments Incorporated * Author: Mark Salter <msalter@redhat.com> */ #ifndef _ASM_C6X_UACCESS_H #define _ASM_C6X_UACCESS_H #include <linux/types.h> #include <linux/compiler.h> #include <linux/string.h> /* * C6X supports unaligned 32 and 64 bit loads and stores. */ static inline __must_check unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n) { u32 tmp32; u64 tmp64; if (__builtin_constant_p(n)) { switch (n) { case 1: *(u8 *)to = *(u8 __force *)from; return 0; case 4: asm volatile ("ldnw .d1t1 *%2,%0\n" "nop 4\n" "stnw .d1t1 %0,*%1\n" : "=&a"(tmp32) : "A"(to), "a"(from) : "memory"); return 0; case 8: asm volatile ("ldndw .d1t1 *%2,%0\n" "nop 4\n" "stndw .d1t1 %0,*%1\n" : "=&a"(tmp64) : "a"(to), "a"(from) : "memory"); return 0; default: break; } } memcpy(to, (const void __force *)from, n); return 0; } static inline __must_check unsigned long raw_copy_to_user(void __user *to, const void *from, unsigned long n) { u32 tmp32; u64 tmp64; if (__builtin_constant_p(n)) { switch (n) { case 1: *(u8 __force *)to = *(u8 *)from; return 0; case 4: asm volatile ("ldnw .d1t1 *%2,%0\n" "nop 4\n" "stnw .d1t1 %0,*%1\n" : "=&a"(tmp32) : "a"(to), "a"(from) : "memory"); return 0; case 8: asm volatile ("ldndw .d1t1 *%2,%0\n" "nop 4\n" "stndw .d1t1 %0,*%1\n" : "=&a"(tmp64) : "a"(to), "a"(from) : "memory"); return 0; default: break; } } memcpy((void __force *)to, from, n); return 0; } #define INLINE_COPY_FROM_USER #define INLINE_COPY_TO_USER extern int _access_ok(unsigned long addr, unsigned long size); #ifdef CONFIG_ACCESS_CHECK #define __access_ok _access_ok #endif #include <asm-generic/uaccess.h> #endif /* _ASM_C6X_UACCESS_H */