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 | ||
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 | |
18 | ||
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; \ | |
aeb39876 | 26 | bne,pn %icc, ___copy_in_user; \ |
1da177e4 LT |
27 | nop; \ |
28 | ||
29 | #include "U1memcpy.S" |