1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
/* SPDX-License-Identifier: GPL-2.0 */
/* NGcopy_to_user.S: Niagara optimized copy to userspace.
*
* Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
*/
#define EX_ST(x,y) \
98: x; \
.section __ex_table,"a";\
.align 4; \
.word 98b, y; \
.text; \
.align 4;
#ifndef ASI_AIUS
#define ASI_AIUS 0x11
#endif
#define FUNC_NAME NGcopy_to_user
#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS
#define EX_RETVAL(x) %g0
#ifdef __KERNEL__
/* Writing to %asi is _expensive_ so we hardcode it.
* Reading %asi to check for KERNEL_DS is comparatively
* cheap.
*/
#define PREAMBLE \
rd %asi, %g1; \
cmp %g1, ASI_AIUS; \
bne,pn %icc, raw_copy_in_user; \
nop
#endif
#include "NGmemcpy.S"
|
