blob: c4ee858e352a2be0e028ac757dd399938e89db04 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* U3copy_to_user.S: UltraSparc-III optimized copy to userspace.
2 *
3 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
4 */
5
David S. Milleree841d02016-10-24 21:20:35 -07006#define EX_ST(x,y) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798: x; \
David S. Miller4d000d52006-03-04 23:23:56 -08008 .section __ex_table,"a";\
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 .align 4; \
David S. Milleree841d02016-10-24 21:20:35 -070010 .word 98b, y; \
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 .text; \
12 .align 4;
13
David S. Milleree841d02016-10-24 21:20:35 -070014#define EX_ST_FP(x,y) \
Rob Gardnera7c57242015-12-22 23:24:49 -07001598: x; \
16 .section __ex_table,"a";\
17 .align 4; \
David S. Milleree841d02016-10-24 21:20:35 -070018 .word 98b, y##_fp; \
Rob Gardnera7c57242015-12-22 23:24:49 -070019 .text; \
20 .align 4;
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#define FUNC_NAME U3copy_to_user
23#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
24#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
25#define EX_RETVAL(x) 0
26
27 /* Writing to %asi is _expensive_ so we hardcode it.
28 * Reading %asi to check for KERNEL_DS is comparatively
29 * cheap.
30 */
31#define PREAMBLE \
32 rd %asi, %g1; \
33 cmp %g1, ASI_AIUS; \
David S. Milleraeb39872009-02-08 22:32:31 -080034 bne,pn %icc, ___copy_in_user; \
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 nop; \
36
37#include "U3memcpy.S"