/* 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" |