[deliverable/linux.git] / arch / sparc64 / 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 .fixup;	\
	.align 4;		\
99:	retl;			\
	 mov	1, %o0;		\
	.section __ex_table,"a";\
	.align 4;		\
	.word 98b, 99b;		\
	.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, memcpy_user_stub;		\
	 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; \
	8	.section .fixup; \
	9	.align 4; \
	10	99: retl; \
	11	mov 1, %o0; \
4d000d5b	12	.section __ex_table,"a";\
1da177e4 LT	13	.align 4; \
	14	.word 98b, 99b; \
	15	.text; \
	16	.align 4;
	17
	18	#define FUNC_NAME U3copy_to_user
	19	#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
	20	#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
	21	#define EX_RETVAL(x) 0
	22
	23	/* Writing to %asi is _expensive_ so we hardcode it.
	24	* Reading %asi to check for KERNEL_DS is comparatively
	25	* cheap.
	26	*/
	27	#define PREAMBLE \
	28	rd %asi, %g1; \
	29	cmp %g1, ASI_AIUS; \
	30	bne,pn %icc, memcpy_user_stub; \
	31	nop; \
	32
	33	#include "U3memcpy.S"