Add linux-next specific files for 20110831
[linux-2.6/next.git] / arch / sparc / lib / NG2copy_to_user.S
blob7fe1ccefd9d056a104407c8d1595095c7fc5add8
1 /* NG2copy_to_user.S: Niagara-2 optimized copy to userspace.
2  *
3  * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
4  */
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;
14 #ifndef ASI_AIUS
15 #define ASI_AIUS        0x11
16 #endif
18 #ifndef ASI_BLK_AIUS_4V
19 #define ASI_BLK_AIUS_4V 0x17
20 #endif
22 #ifndef ASI_BLK_INIT_QUAD_LDD_AIUS
23 #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23
24 #endif
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
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;                  \
40         bne,pn          %icc, ___copy_in_user;          \
41          nop
42 #endif
44 #include "NG2memcpy.S"