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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; \
8 .section .fixup; \
9 .align 4; \
1099: wr %g0, ASI_AIUS, %asi;\
11 retl; \
12 mov 1, %o0; \
13 .section __ex_table,"a";\
14 .align 4; \
15 .word 98b, 99b; \
16 .text; \
17 .align 4;
18
19#ifndef ASI_AIUS
20#define ASI_AIUS 0x11
21#endif
22
23#ifndef ASI_BLK_AIUS_4V
24#define ASI_BLK_AIUS_4V 0x17
25#endif
26
27#ifndef ASI_BLK_INIT_QUAD_LDD_AIUS
28#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23
29#endif
30
31#define FUNC_NAME NG2copy_to_user
32#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
33#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS
34#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS_4V
35#define EX_RETVAL(x) 0
36
37#ifdef __KERNEL__
38 /* Writing to %asi is _expensive_ so we hardcode it.
39 * Reading %asi to check for KERNEL_DS is comparatively
40 * cheap.
41 */
42#define PREAMBLE \
43 rd %asi, %g1; \
44 cmp %g1, ASI_AIUS; \
45 bne,pn %icc, memcpy_user_stub; \
46 nop
47#endif
48
49#include "NG2memcpy.S"