projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* U1copy_to_user.S: UltraSparc-I/II/IIi/IIe optimized copy to userspace. |
| 2 | * | |
| 3 | * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) | |
| 4 | */ | |
| 5 | ||
| cb736fdb | 6 | #define EX_ST(x,y) \ |
| 1da177e4 | 7 | 98: x; \ |
| 4d000d5b | 8 | .section __ex_table,"a";\ |
| 1da177e4 | 9 | .align 4; \ |
| cb736fdb | 10 | .word 98b, y; \ |
| 1da177e4 LT |
11 | .text; \ |
| 12 | .align 4; | |
| 13 | ||
| cb736fdb | 14 | #define EX_ST_FP(x,y) \ |
| a7c5724b RG |
15 | 98: x; \ |
| 16 | .section __ex_table,"a";\ | |
| 17 | .align 4; \ | |
| cb736fdb | 18 | .word 98b, y; \ |
| a7c5724b RG |
19 | .text; \ |
| 20 | .align 4; | |
| 21 | ||
| 31af2f36 | 22 | #define FUNC_NAME raw_copy_to_user |
| 1da177e4 LT |
23 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS |
| 24 | #define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS | |
| 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; \ | |
| 31af2f36 | 34 | bne,pn %icc, raw_copy_in_user; \ |
| 1da177e4 LT |
35 | nop; \ |
| 36 | ||
| 37 | #include "U1memcpy.S" |