1/* GENcopy_to_user.S: Generic sparc64 copy to userspace. 2 * 3 * Copyright (C) 2007 David S. Miller (davem@davemloft.net) 4 */ 5 6#define EX_ST(x,y) \ 798: x; \ 8 .section __ex_table,"a";\ 9 .align 4; \ 10 .word 98b, y; \ 11 .text; \ 12 .align 4; 13 14#ifndef ASI_AIUS 15#define ASI_AIUS 0x11 16#endif 17 18#define FUNC_NAME GENcopy_to_user 19#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS 20#define EX_RETVAL(x) 0 21 22#ifdef __KERNEL__ 23 /* Writing to %asi is _expensive_ so we hardcode it. 24 * Reading %asi to check for KERNEL_DS is comparatively 25 * cheap. 26 */ 27#define PREAMBLE \ 28 rd %asi, %g1; \ 29 cmp %g1, ASI_AIUS; \ 30 bne,pn %icc, ___copy_in_user; \ 31 nop 32#endif 33 34#include "GENmemcpy.S" 35