1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* NGcopy_to_user.S: Niagara optimized copy to userspace.
3  *
4  * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
5  */
6 
7 #define EX_ST(x,y)		\
8 98:	x;			\
9 	.section __ex_table,"a";\
10 	.align 4;		\
11 	.word 98b, y;		\
12 	.text;			\
13 	.align 4;
14 
15 #ifndef ASI_AIUS
16 #define ASI_AIUS	0x11
17 #endif
18 
19 #define FUNC_NAME		NGcopy_to_user
20 #define STORE(type,src,addr)	type##a src, [addr] ASI_AIUS
21 #define STORE_ASI		ASI_BLK_INIT_QUAD_LDD_AIUS
22 #define EX_RETVAL(x)		%g0
23 
24 #ifdef __KERNEL__
25 	/* Writing to %asi is _expensive_ so we hardcode it.
26 	 * Reading %asi to check for KERNEL_DS is comparatively
27 	 * cheap.
28 	 */
29 #define PREAMBLE					\
30 	rd		%asi, %g1;			\
31 	cmp		%g1, ASI_AIUS;			\
32 	bne,pn		%icc, raw_copy_in_user;		\
33 	 nop
34 #endif
35 
36 #include "NGmemcpy.S"
37