2005-04-17 02:20:36 +04:00
|
|
|
/* 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; \
|
2006-03-05 10:23:56 +03:00
|
|
|
.section __ex_table,"a";\
|
2005-04-17 02:20:36 +04:00
|
|
|
.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"
|
