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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
David S. Miller90192052012-09-27 14:26:31 -07002/* NG4copy_from_user.S: Niagara-4 optimized copy from userspace.
David S. Millerae2c6ca2012-09-26 21:11:01 -07003 *
4 * Copyright (C) 2012 David S. Miller (davem@davemloft.net)
5 */
6
David S. Miller957077042016-10-24 18:58:05 -07007#define EX_LD(x, y) \
David S. Millerae2c6ca2012-09-26 21:11:01 -0700898: x; \
9 .section __ex_table,"a";\
10 .align 4; \
David S. Miller957077042016-10-24 18:58:05 -070011 .word 98b, y; \
David S. Millerae2c6ca2012-09-26 21:11:01 -070012 .text; \
13 .align 4;
14
David S. Miller957077042016-10-24 18:58:05 -070015#define EX_LD_FP(x,y) \
Rob Gardnera7c57242015-12-22 23:24:49 -07001698: x; \
17 .section __ex_table,"a";\
18 .align 4; \
David S. Miller957077042016-10-24 18:58:05 -070019 .word 98b, y##_fp; \
Rob Gardnera7c57242015-12-22 23:24:49 -070020 .text; \
21 .align 4;
22
David S. Millerae2c6ca2012-09-26 21:11:01 -070023#ifndef ASI_AIUS
24#define ASI_AIUS 0x11
25#endif
26
27#define FUNC_NAME NG4copy_from_user
28#define LOAD(type,addr,dest) type##a [addr] %asi, dest
29#define EX_RETVAL(x) 0
30
31#ifdef __KERNEL__
32#define PREAMBLE \
33 rd %asi, %g1; \
34 cmp %g1, ASI_AIUS; \
Al Viro31af2f32017-03-21 17:04:45 -040035 bne,pn %icc, raw_copy_in_user; \
David S. Millerae2c6ca2012-09-26 21:11:01 -070036 nop
37#endif
38
39#include "NG4memcpy.S"