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 .fixup; \ 9 .align 4; \ 1099: retl; \ 11 mov 1, %o0; \ 12 .section __ex_table,"a";\ 13 .align 4; \ 14 .word 98b, 99b; \ 15 .text; \ 16 .align 4; 17 18#define FUNC_NAME ___copy_from_user 19#define LOAD(type,addr,dest) type##a [addr] %asi, dest 20#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest 21#define EX_RETVAL(x) 0 22 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, memcpy_user_stub; \ 31 nop; \ 32 33#include "U1memcpy.S" 34