You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29 lines
720 B
29 lines
720 B
/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
|
|
*
|
|
* Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
|
|
*/
|
|
|
|
#define EX_LD(x) \
|
|
98: x; \
|
|
.section __ex_table,"a";\
|
|
.align 4; \
|
|
.word 98b, __retl_one; \
|
|
.text; \
|
|
.align 4;
|
|
|
|
#define FUNC_NAME ___copy_from_user
|
|
#define LOAD(type,addr,dest) type##a [addr] %asi, dest
|
|
#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest
|
|
#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 "U1memcpy.S"
|
|
|