| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|
| 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 | |
|---|
| 7 | #define EX_LD(x,y) \ |
|---|
| 8 | 98: x; \ |
|---|
| 9 | .section __ex_table,"a";\ |
|---|
| 10 | .align 4; \ |
|---|
| 11 | .word 98b, y; \ |
|---|
| 12 | .text; \ |
|---|
| 13 | .align 4; |
|---|
| 14 | |
|---|
| 15 | #define EX_LD_FP(x,y) \ |
|---|
| 16 | 98: x; \ |
|---|
| 17 | .section __ex_table,"a";\ |
|---|
| 18 | .align 4; \ |
|---|
| 19 | .word 98b, y; \ |
|---|
| 20 | .text; \ |
|---|
| 21 | .align 4; |
|---|
| 22 | |
|---|
| 23 | #define FUNC_NAME raw_copy_from_user |
|---|
| 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; \ |
|---|
| 35 | bne,pn %icc, raw_copy_in_user; \ |
|---|
| 36 | nop; \ |
|---|
| 37 | |
|---|
| 38 | #include "U1memcpy.S" |
|---|
| 39 | |
|---|
