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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
6#define EX_ST(x) \
798: 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. Miller40bdac72009-02-08 22:00:55 -080010 .word 98b, __retl_one; \
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 .text; \
12 .align 4;
13
14#define FUNC_NAME U3copy_to_user
15#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
16#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
17#define EX_RETVAL(x) 0
18
19 /* Writing to %asi is _expensive_ so we hardcode it.
20 * Reading %asi to check for KERNEL_DS is comparatively
21 * cheap.
22 */
23#define PREAMBLE \
24 rd %asi, %g1; \
25 cmp %g1, ASI_AIUS; \
David S. Milleraeb39872009-02-08 22:32:31 -080026 bne,pn %icc, ___copy_in_user; \
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 nop; \
28
29#include "U3memcpy.S"