Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 */
/* NG4copy_to_user.S: Niagara-4 optimized copy to userspace.
 *
 * Copyright (C) 2012 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;
 
#define EX_ST_FP(x,y)		\
98:	x;			\
<------>.section __ex_table,"a";\
<------>.align 4;		\
<------>.word 98b, y##_fp;	\
<------>.text;			\
<------>.align 4;
 
#ifndef ASI_AIUS
#define ASI_AIUS	0x11
#endif
 
#ifndef ASI_BLK_INIT_QUAD_LDD_AIUS
#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23
#endif
 
#define FUNC_NAME		NG4copy_to_user
#define STORE(type,src,addr)	type##a src, [addr] %asi
#define STORE_ASI		ASI_BLK_INIT_QUAD_LDD_AIUS
#define EX_RETVAL(x)		0
 
#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 "NG4memcpy.S"