projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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" |