41 lines
828 B
ArmAsm
41 lines
828 B
ArmAsm
|
/* NGcopy_to_user.S: Niagara optimized copy to userspace.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2006 David S. Miller (davem@davemloft.net)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define EX_ST(x) \
|
||
|
|
98: x; \
|
||
|
|
.section .fixup; \
|
||
|
|
.align 4; \
|
||
|
|
99: wr %g0, ASI_AIUS, %asi;\
|
||
|
|
retl; \
|
||
|
|
mov 1, %o0; \
|
||
|
|
.section __ex_table,"a";\
|
||
|
|
.align 4; \
|
||
|
|
.word 98b, 99b; \
|
||
|
|
.text; \
|
||
|
|
.align 4;
|
||
|
|
|
||
|
|
#ifndef ASI_AIUS
|
||
|
|
#define ASI_AIUS 0x11
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define FUNC_NAME NGcopy_to_user
|
||
|
|
#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
|
||
|
|
#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, memcpy_user_stub; \
|
||
|
|
nop
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "U3memcpy.S"
|