[deliverable/linux.git] / arch / sparc / lib / U3copy_to_user.S

/* U3copy_to_user.S: UltraSparc-III optimized copy to userspace.
 *
 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
 */

#define EX_ST(x)		\
98:	x;			\
	.section __ex_table,"a";\
	.align 4;		\
	.word 98b, __retl_one;	\
	.text;			\
	.align 4;

#define FUNC_NAME		U3copy_to_user
#define STORE(type,src,addr)	type##a src, [addr] ASI_AIUS
#define STORE_BLK(src,addr)	stda src, [addr] ASI_BLK_AIUS
#define EX_RETVAL(x)		0

	/* 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, ___copy_in_user;		\
	 nop;						\

#include "U3memcpy.S"
Commit	Line	Data
1da177e4 LT	1	/* U3copy_to_user.S: UltraSparc-III optimized copy to userspace.
	2	*
	3	* Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
	4	*/
	5
	6	#define EX_ST(x) \
	7	98: x; \
4d000d5b	8	.section __ex_table,"a";\
1da177e4	9	.align 4; \
40bdac7d	10	.word 98b, __retl_one; \
1da177e4 LT	11	.text; \
	12	.align 4;
	13
	14	#define FUNC_NAME U3copy_to_user
	15	#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
	16	#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
	17	#define EX_RETVAL(x) 0
	18
	19	/* Writing to %asi is _expensive_ so we hardcode it.
	20	* Reading %asi to check for KERNEL_DS is comparatively
	21	* cheap.
	22	*/
	23	#define PREAMBLE \
	24	rd %asi, %g1; \
	25	cmp %g1, ASI_AIUS; \
aeb39876	26	bne,pn %icc, ___copy_in_user; \
1da177e4 LT	27	nop; \
	28
	29	#include "U3memcpy.S"