mirror of
https://github.com/torvalds/linux.git
synced 2024-11-12 07:01:57 +00:00
6c70b6fc7b
Check the cpu type in the OBP device tree before committing to using the optimized Niagara memcpy and memset implementation. If we don't recognize the cpu type, use a completely generic version. Signed-off-by: David S. Miller <davem@davemloft.net>
39 lines
757 B
ArmAsm
39 lines
757 B
ArmAsm
/* GENcopy_to_user.S: Generic sparc64 copy to userspace.
|
|
*
|
|
* Copyright (C) 2007 David S. Miller (davem@davemloft.net)
|
|
*/
|
|
|
|
#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;
|
|
|
|
#ifndef ASI_AIUS
|
|
#define ASI_AIUS 0x11
|
|
#endif
|
|
|
|
#define FUNC_NAME GENcopy_to_user
|
|
#define STORE(type,src,addr) type##a src, [addr] ASI_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 "GENmemcpy.S"
|