/* * Copyright (C) 2011 Texas Instruments Incorporated * Author: Mark Salter <msalter@redhat.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #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 */
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Kbuild | File | 865 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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bitops.h | File | 2.17 KB | 0644 |
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bug.h | File | 705 B | 0644 |
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cache.h | File | 3.1 KB | 0644 |
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cacheflush.h | File | 2.05 KB | 0644 |
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checksum.h | File | 947 B | 0644 |
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clock.h | File | 3.51 KB | 0644 |
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cmpxchg.h | File | 1.57 KB | 0644 |
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delay.h | File | 1.67 KB | 0644 |
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dma-mapping.h | File | 911 B | 0644 |
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dscr.h | File | 909 B | 0644 |
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elf.h | File | 3.18 KB | 0644 |
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flat.h | File | 677 B | 0644 |
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ftrace.h | File | 97 B | 0644 |
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hardirq.h | File | 572 B | 0644 |
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irq.h | File | 1.59 KB | 0644 |
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irqflags.h | File | 1.67 KB | 0644 |
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linkage.h | File | 497 B | 0644 |
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megamod-pic.h | File | 213 B | 0644 |
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module.h | File | 639 B | 0644 |
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page.h | File | 312 B | 0644 |
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pgtable.h | File | 2.29 KB | 0644 |
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processor.h | File | 3.31 KB | 0644 |
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procinfo.h | File | 673 B | 0644 |
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ptrace.h | File | 998 B | 0644 |
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sections.h | File | 287 B | 0644 |
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setup.h | File | 914 B | 0644 |
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soc.h | File | 929 B | 0644 |
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special_insns.h | File | 1.82 KB | 0644 |
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string.h | File | 616 B | 0644 |
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switch_to.h | File | 992 B | 0644 |
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syscall.h | File | 2.2 KB | 0644 |
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syscalls.h | File | 1.73 KB | 0644 |
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thread_info.h | File | 2.63 KB | 0644 |
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timer64.h | File | 154 B | 0644 |
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timex.h | File | 867 B | 0644 |
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tlb.h | File | 192 B | 0644 |
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traps.h | File | 1.29 KB | 0644 |
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uaccess.h | File | 2.14 KB | 0644 |
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unaligned.h | File | 4.63 KB | 0644 |
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