18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */
28c2ecf20Sopenharmony_ci/* GENcopy_to_user.S: Generic sparc64 copy to userspace.
38c2ecf20Sopenharmony_ci *
48c2ecf20Sopenharmony_ci * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
58c2ecf20Sopenharmony_ci */
68c2ecf20Sopenharmony_ci
78c2ecf20Sopenharmony_ci#define EX_ST(x,y)		\
88c2ecf20Sopenharmony_ci98:	x;			\
98c2ecf20Sopenharmony_ci	.section __ex_table,"a";\
108c2ecf20Sopenharmony_ci	.align 4;		\
118c2ecf20Sopenharmony_ci	.word 98b, y;		\
128c2ecf20Sopenharmony_ci	.text;			\
138c2ecf20Sopenharmony_ci	.align 4;
148c2ecf20Sopenharmony_ci
158c2ecf20Sopenharmony_ci#ifndef ASI_AIUS
168c2ecf20Sopenharmony_ci#define ASI_AIUS	0x11
178c2ecf20Sopenharmony_ci#endif
188c2ecf20Sopenharmony_ci
198c2ecf20Sopenharmony_ci#define FUNC_NAME		GENcopy_to_user
208c2ecf20Sopenharmony_ci#define STORE(type,src,addr)	type##a src, [addr] ASI_AIUS
218c2ecf20Sopenharmony_ci#define EX_RETVAL(x)		0
228c2ecf20Sopenharmony_ci
238c2ecf20Sopenharmony_ci#ifdef __KERNEL__
248c2ecf20Sopenharmony_ci	/* Writing to %asi is _expensive_ so we hardcode it.
258c2ecf20Sopenharmony_ci	 * Reading %asi to check for KERNEL_DS is comparatively
268c2ecf20Sopenharmony_ci	 * cheap.
278c2ecf20Sopenharmony_ci	 */
288c2ecf20Sopenharmony_ci#define PREAMBLE					\
298c2ecf20Sopenharmony_ci	rd		%asi, %g1;			\
308c2ecf20Sopenharmony_ci	cmp		%g1, ASI_AIUS;			\
318c2ecf20Sopenharmony_ci	bne,pn		%icc, raw_copy_in_user;		\
328c2ecf20Sopenharmony_ci	 nop
338c2ecf20Sopenharmony_ci#endif
348c2ecf20Sopenharmony_ci
358c2ecf20Sopenharmony_ci#include "GENmemcpy.S"
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