1/* NGcopy_to_user.S: Niagara optimized copy to userspace. 2 * 3 * Copyright (C) 2006, 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 NGcopy_to_user 19#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS 20#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS 21#define EX_RETVAL(x) %g0 22 23#ifdef __KERNEL__ 24 /* Writing to %asi is _expensive_ so we hardcode it. 25 * Reading %asi to check for KERNEL_DS is comparatively 26 * cheap. 27 */ 28#define PREAMBLE \ 29 rd %asi, %g1; \ 30 cmp %g1, ASI_AIUS; \ 31 bne,pn %icc, ___copy_in_user; \ 32 nop 33#endif 34 35#include "NGmemcpy.S" 36