Add linux-next specific files for 20110831
[linux-2.6/next.git] / arch / sparc / lib / U1copy_from_user.S
bloba6ae2ea04bf5dfbffda2884a6a46b051ae2ac2a8
1 /* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
2  *
3  * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
4  */
6 #define EX_LD(x)                \
7 98:     x;                      \
8         .section __ex_table,"a";\
9         .align 4;               \
10         .word 98b, __retl_one;  \
11         .text;                  \
12         .align 4;
14 #define FUNC_NAME               ___copy_from_user
15 #define LOAD(type,addr,dest)    type##a [addr] %asi, dest
16 #define LOAD_BLK(addr,dest)     ldda [addr] ASI_BLK_AIUS, dest
17 #define EX_RETVAL(x)            0
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;                  \
26         bne,pn          %icc, ___copy_in_user;          \
27          nop;                                           \
29 #include "U1memcpy.S"