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David S. Millercf5adce2007-08-16 01:47:25 -07001/* NG2copy_to_user.S: Niagara-2 optimized copy to userspace.
2 *
3 * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
4 */
5
6#define EX_ST(x) \
798: x; \
David S. Millercf5adce2007-08-16 01:47:25 -07008 .section __ex_table,"a";\
9 .align 4; \
David S. Miller40bdac72009-02-08 22:00:55 -080010 .word 98b, __retl_one_asi;\
David S. Millercf5adce2007-08-16 01:47:25 -070011 .text; \
12 .align 4;
13
14#ifndef ASI_AIUS
15#define ASI_AIUS 0x11
16#endif
17
18#ifndef ASI_BLK_AIUS_4V
19#define ASI_BLK_AIUS_4V 0x17
20#endif
21
22#ifndef ASI_BLK_INIT_QUAD_LDD_AIUS
23#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23
24#endif
25
26#define FUNC_NAME NG2copy_to_user
27#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
28#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS
29#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS_4V
30#define EX_RETVAL(x) 0
31
32#ifdef __KERNEL__
33 /* Writing to %asi is _expensive_ so we hardcode it.
34 * Reading %asi to check for KERNEL_DS is comparatively
35 * cheap.
36 */
37#define PREAMBLE \
38 rd %asi, %g1; \
39 cmp %g1, ASI_AIUS; \
David S. Milleraeb39872009-02-08 22:32:31 -080040 bne,pn %icc, ___copy_in_user; \
David S. Millercf5adce2007-08-16 01:47:25 -070041 nop
42#endif
43
44#include "NG2memcpy.S"