openwrt/upstream - upstream openwrt

	Commit message (Expand)	Author	Age	Files	Lines
*	wwan: rename data files	Simon Hailes	2016-10-26	1	-0/+5

/* * User address space access functions. * * Copyright 1997 Andi Kleen <ak@muc.de> * Copyright 1997 Linus Torvalds * Copyright 2002 Andi Kleen <ak@suse.de> */ #include <xen/config.h> #include <xen/lib.h> #include <asm/uaccess.h> unsigned long __copy_to_user_ll(void __user *to, const void *from, unsigned n) { unsigned long __d0, __d1, __d2, __n = n; __asm__ __volatile__( " cmp $"STR(2*BYTES_PER_LONG-1)",%0\n" " jbe 1f\n" " mov %1,%0\n" " neg %0\n" " and $"STR(BYTES_PER_LONG-1)",%0\n" " sub %0,%3\n" "4: rep; movsb\n" /* make 'to' address aligned */ " mov %3,%0\n" " shr $"STR(LONG_BYTEORDER)",%0\n" " and $"STR(BYTES_PER_LONG-1)",%3\n" " .align 2,0x90\n" "0: rep; movs"__OS"\n" /* as many words as possible... */ " mov %3,%0\n" "1: rep; movsb\n" /* ...remainder copied as bytes */ "2:\n" ".section .fixup,\"ax\"\n" "5: add %3,%0\n" " jmp 2b\n" "3: lea 0(%3,%0,"STR(BYTES_PER_LONG)"),%0\n" " jmp 2b\n" ".previous\n" ".section __ex_table,\"a\"\n" " "__FIXUP_ALIGN"\n" " "__FIXUP_WORD" 4b,5b\n" " "__FIXUP_WORD" 0b,3b\n" " "__FIXUP_WORD" 1b,2b\n" ".previous" : "=&c"(__n), "=&D" (__d0), "=&S" (__d1), "=r"(__d2) : "3"(__n), "0"(__n), "1"(to), "2"(from) : "memory"); return (unsigned)__n; } unsigned long __copy_from_user_ll(void *to, const void __user *from, unsigned n) { unsigned long __d0, __d1, __d2, __n = n; __asm__ __volatile__( " cmp $"STR(2*BYTES_PER_LONG-1)",%0\n" " jbe 1f\n" " mov %1,%0\n" " neg %0\n" " and $"STR(BYTES_PER_LONG-1)",%0\n" " sub %0,%3\n" "4: rep; movsb\n" /* make 'to' address aligned */ " mov %3,%0\n" " shr $"STR(LONG_BYTEORDER)",%0\n" " and $"STR(BYTES_PER_LONG-1)",%3\n" " .align 2,0x90\n" "0: rep; movs"__OS"\n" /* as many words as possible... */ " mov %3,%0\n" "1: rep; movsb\n" /* ...remainder copied as bytes */ "2:\n" ".section .fixup,\"ax\"\n" "5: add %3,%0\n" " jmp 6f\n" "3: lea 0(%3,%0,"STR(BYTES_PER_LONG)"),%0\n" "6: push %0\n" " push %%"__OP"ax\n" " xor %%eax,%%eax\n" " rep; stosb\n" " pop %%"__OP"ax\n" " pop %0\n" " jmp 2b\n" ".previous\n" ".section __ex_table,\"a\"\n" " "__FIXUP_ALIGN"\n" " "__FIXUP_WORD" 4b,5b\n" " "__FIXUP_WORD" 0b,3b\n" " "__FIXUP_WORD" 1b,6b\n" ".previous" : "=&c"(__n), "=&D" (__d0), "=&S" (__d1), "=r"(__d2) : "3"(__n), "0"(__n), "1"(to), "2"(from) : "memory"); return (unsigned)__n; } /** * copy_to_user: - Copy a block of data into user space. * @to: Destination address, in user space. * @from: Source address, in kernel space. * @n: Number of bytes to copy. * * Context: User context only. This function may sleep. * * Copy data from kernel space to user space. * * Returns number of bytes that could not be copied. * On success, this will be zero. */ unsigned long copy_to_user(void __user *to, const void *from, unsigned n) { if (access_ok(to, n)) n = __copy_to_user(to, from, n); return n; } /** * copy_from_user: - Copy a block of data from user space. * @to: Destination address, in kernel space. * @from: Source address, in user space. * @n: Number of bytes to copy. * * Context: User context only. This function may sleep. * * Copy data from user space to kernel space. * * Returns number of bytes that could not be copied. * On success, this will be zero. * * If some data could not be copied, this function will pad the copied * data to the requested size using zero bytes. */ unsigned long copy_from_user(void *to, const void __user *from, unsigned n) { if (access_ok(from, n)) n = __copy_from_user(to, from, n); else memset(to, 0, n); return n; }