Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
[linux-2.6-microblaze.git] / arch / sparc / lib / NG2copy_to_user.S
1 /* 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)                \
7 98:     x;                      \
8         .section __ex_table,"a";\
9         .align 4;               \
10         .word 98b, __retl_one_asi;\
11         .text;                  \
12         .align 4;
13
14 #define EX_ST_FP(x)             \
15 98:     x;                      \
16         .section __ex_table,"a";\
17         .align 4;               \
18         .word 98b, __retl_one_asi_fp;\
19         .text;                  \
20         .align 4;
21
22 #ifndef ASI_AIUS
23 #define ASI_AIUS        0x11
24 #endif
25
26 #ifndef ASI_BLK_AIUS_4V
27 #define ASI_BLK_AIUS_4V 0x17
28 #endif
29
30 #ifndef ASI_BLK_INIT_QUAD_LDD_AIUS
31 #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23
32 #endif
33
34 #define FUNC_NAME               NG2copy_to_user
35 #define STORE(type,src,addr)    type##a src, [addr] ASI_AIUS
36 #define STORE_ASI               ASI_BLK_INIT_QUAD_LDD_AIUS
37 #define STORE_BLK(src,addr)     stda src, [addr] ASI_BLK_AIUS_4V
38 #define EX_RETVAL(x)            0
39
40 #ifdef __KERNEL__
41         /* Writing to %asi is _expensive_ so we hardcode it.
42          * Reading %asi to check for KERNEL_DS is comparatively
43          * cheap.
44          */
45 #define PREAMBLE                                        \
46         rd              %asi, %g1;                      \
47         cmp             %g1, ASI_AIUS;                  \
48         bne,pn          %icc, ___copy_in_user;          \
49          nop
50 #endif
51
52 #include "NG2memcpy.S"