projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | /* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace. |
| 3 | * | |
| 4 | * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) | |
| 5 | */ | |
| 6 | ||
| cb736fdb | 7 | #define EX_LD(x,y) \ |
| 1da177e4 | 8 | 98: x; \ |
| 4d000d5b | 9 | .section __ex_table,"a";\ |
| 1da177e4 | 10 | .align 4; \ |
| cb736fdb | 11 | .word 98b, y; \ |
| 1da177e4 LT |
12 | .text; \ |
| 13 | .align 4; | |
| 14 | ||
| cb736fdb | 15 | #define EX_LD_FP(x,y) \ |
| a7c5724b RG |
16 | 98: x; \ |
| 17 | .section __ex_table,"a";\ | |
| 18 | .align 4; \ | |
| cb736fdb | 19 | .word 98b, y; \ |
| a7c5724b RG |
20 | .text; \ |
| 21 | .align 4; | |
| 22 | ||
| 31af2f36 | 23 | #define FUNC_NAME raw_copy_from_user |
| 1da177e4 LT |
24 | #define LOAD(type,addr,dest) type##a [addr] %asi, dest |
| 25 | #define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest | |
| 26 | #define EX_RETVAL(x) 0 | |
| 27 | ||
| 28 | /* Writing to %asi is _expensive_ so we hardcode it. | |
| 29 | * Reading %asi to check for KERNEL_DS is comparatively | |
| 30 | * cheap. | |
| 31 | */ | |
| 32 | #define PREAMBLE \ | |
| 33 | rd %asi, %g1; \ | |
| 34 | cmp %g1, ASI_AIUS; \ | |
| 31af2f36 | 35 | bne,pn %icc, raw_copy_in_user; \ |
| 1da177e4 LT |
36 | nop; \ |
| 37 | ||
| 38 | #include "U1memcpy.S" |