/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace. * * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) */ #define EX_LD(x) \ 98: x; \ .section __ex_table,"a";\ .align 4; \ .word 98b, __retl_one; \ .text; \ .align 4; #define FUNC_NAME ___copy_from_user #define LOAD(type,addr,dest) type##a [addr] %asi, dest #define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest #define EX_RETVAL(x) 0 /* Writing to %asi is _expensive_ so we hardcode it. * Reading %asi to check for KERNEL_DS is comparatively * cheap. */ #define PREAMBLE \ rd %asi, %g1; \ cmp %g1, ASI_AIUS; \ bne,pn %icc, ___copy_in_user; \ nop; \ #include "U1memcpy.S"