LXR linux/arch/sparc/lib/NGcopy_to

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* NGcopy_to_user.S: Niagara optimized copy to userspace.
   3 *
   4 * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
   5 */
   6
   7#define EX_ST(x,y)              \
   898:     x;                      \
   9        .section __ex_table,"a";\
  10        .align 4;               \
  11        .word 98b, y;           \
  12        .text;                  \
  13        .align 4;
  14
  15#ifndef ASI_AIUS
  16#define ASI_AIUS        0x11
  17#endif
  18
  19#define FUNC_NAME               NGcopy_to_user
  20#define STORE(type,src,addr)    type##a src, [addr] ASI_AIUS
  21#define STORE_ASI               ASI_BLK_INIT_QUAD_LDD_AIUS
  22#define EX_RETVAL(x)            %g0
  23
  24#ifdef __KERNEL__
  25        /* Writing to %asi is _expensive_ so we hardcode it.
  26         * Reading %asi to check for KERNEL_DS is comparatively
  27         * cheap.
  28         */
  29#define PREAMBLE                                        \
  30        rd              %asi, %g1;                      \
  31        cmp             %g1, ASI_AIUS;                  \
  32        bne,pn          %icc, raw_copy_in_user;         \
  33         nop
  34#endif
  35
  36#include "NGmemcpy.S"
  37