1/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace. 2 * 3 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) 4 */ 5 6#define EX_LD(x) \ 798: x; \ 8 .section __ex_table,"a";\ 9 .align 4; \ 10 .word 98b, __retl_one; \ 11 .text; \ 12 .align 4; 13 14#define FUNC_NAME ___copy_from_user 15#define LOAD(type,addr,dest) type##a [addr] %asi, dest 16#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest 17#define EX_RETVAL(x) 0 18 19 /* Writing to %asi is _expensive_ so we hardcode it. 20 * Reading %asi to check for KERNEL_DS is comparatively 21 * cheap. 22 */ 23#define PREAMBLE \ 24 rd %asi, %g1; \ 25 cmp %g1, ASI_AIUS; \ 26 bne,pn %icc, ___copy_in_user; \ 27 nop; \ 28 29#include "U1memcpy.S" 30