1/* NG2copy_to_user.S: Niagara-2 optimized copy to userspace. 2 * 3 * Copyright (C) 2007 David S. Miller (davem@davemloft.net) 4 */ 5 6#define EX_ST(x) \ 798: x; \ 8 .section __ex_table,"a";\ 9 .align 4; \ 10 .word 98b, __retl_one_asi;\ 11 .text; \ 12 .align 4; 13 14#ifndef ASI_AIUS 15#define ASI_AIUS 0x11 16#endif 17 18#ifndef ASI_BLK_AIUS_4V 19#define ASI_BLK_AIUS_4V 0x17 20#endif 21 22#ifndef ASI_BLK_INIT_QUAD_LDD_AIUS 23#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 24#endif 25 26#define FUNC_NAME NG2copy_to_user 27#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS 28#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS 29#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS_4V 30#define EX_RETVAL(x) 0 31 32#ifdef __KERNEL__ 33 /* Writing to %asi is _expensive_ so we hardcode it. 34 * Reading %asi to check for KERNEL_DS is comparatively 35 * cheap. 36 */ 37#define PREAMBLE \ 38 rd %asi, %g1; \ 39 cmp %g1, ASI_AIUS; \ 40 bne,pn %icc, ___copy_in_user; \ 41 nop 42#endif 43 44#include "NG2memcpy.S" 45