/* NGcopy_to_user.S: Niagara optimized copy to userspace. | |
* | |
* Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) | |
*/ | |
#define EX_ST(x) \ | |
98: x; \ | |
.section __ex_table,"a";\ | |
.align 4; \ | |
.word 98b, __ret_one_asi;\ | |
.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) %g0 | |
#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, ___copy_in_user; \ | |
nop | |
#endif | |
#include "NGmemcpy.S" |