LXR linux/arch/sparc/lib/GENcopy_to

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* GENcopy_to_user.S: Generic sparc64 copy to userspace.
   3 *
   4 * Copyright (C) 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               GENcopy_to_user
  20#define STORE(type,src,addr)    type##a src, [addr] ASI_AIUS
  21#define EX_RETVAL(x)            0
  22
  23#ifdef __KERNEL__
  24        /* Writing to %asi is _expensive_ so we hardcode it.
  25         * Reading %asi to check for KERNEL_DS is comparatively
  26         * cheap.
  27         */
  28#define PREAMBLE                                        \
  29        rd              %asi, %g1;                      \
  30        cmp             %g1, ASI_AIUS;                  \
  31        bne,pn          %icc, raw_copy_in_user;         \
  32         nop
  33#endif
  34
  35#include "GENmemcpy.S"
  36