/* U3copy_to_user.S: UltraSparc-III optimized copy to userspace. | |
* | |
* Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) | |
*/ | |
#define EX_ST(x,y) \ | |
98: x; \ | |
.section __ex_table,"a";\ | |
.align 4; \ | |
.word 98b, y; \ | |
.text; \ | |
.align 4; | |
#define EX_ST_FP(x,y) \ | |
98: x; \ | |
.section __ex_table,"a";\ | |
.align 4; \ | |
.word 98b, y##_fp; \ | |
.text; \ | |
.align 4; | |
#define FUNC_NAME U3copy_to_user | |
#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS | |
#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS | |
#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 "U3memcpy.S" |