Commit | Line | Data |
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1da177e4 LT |
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 | */ | |
5 | ||
6 | #define EX_LD(x) \ | |
7 | 98: x; \ | |
4d000d5b | 8 | .section __ex_table,"a";\ |
1da177e4 | 9 | .align 4; \ |
40bdac7d | 10 | .word 98b, __retl_one; \ |
1da177e4 LT |
11 | .text; \ |
12 | .align 4; | |
13 | ||
a7c5724b RG |
14 | #define EX_LD_FP(x) \ |
15 | 98: x; \ | |
16 | .section __ex_table,"a";\ | |
17 | .align 4; \ | |
18 | .word 98b, __retl_one_fp;\ | |
19 | .text; \ | |
20 | .align 4; | |
21 | ||
1da177e4 LT |
22 | #define FUNC_NAME ___copy_from_user |
23 | #define LOAD(type,addr,dest) type##a [addr] %asi, dest | |
24 | #define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest | |
25 | #define EX_RETVAL(x) 0 | |
26 | ||
27 | /* Writing to %asi is _expensive_ so we hardcode it. | |
28 | * Reading %asi to check for KERNEL_DS is comparatively | |
29 | * cheap. | |
30 | */ | |
31 | #define PREAMBLE \ | |
32 | rd %asi, %g1; \ | |
33 | cmp %g1, ASI_AIUS; \ | |
aeb39876 | 34 | bne,pn %icc, ___copy_in_user; \ |
1da177e4 LT |
35 | nop; \ |
36 | ||
37 | #include "U1memcpy.S" |