1/* NG4copy_to_user.S: Niagara-4 optimized copy to userspace. 2 * 3 * Copyright (C) 2012 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_INIT_QUAD_LDD_AIUS 19#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 20#endif 21 22#define FUNC_NAME NG4copy_to_user 23#define STORE(type,src,addr) type##a src, [addr] %asi 24#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS 25#define EX_RETVAL(x) 0 26 27#ifdef __KERNEL__ 28 /* Writing to %asi is _expensive_ so we hardcode it. 29 * Reading %asi to check for KERNEL_DS is comparatively 30 * cheap. 31 */ 32#define PREAMBLE \ 33 rd %asi, %g1; \ 34 cmp %g1, ASI_AIUS; \ 35 bne,pn %icc, ___copy_in_user; \ 36 nop 37#endif 38 39#include "NG4memcpy.S" 40