LXR linux/arch/sparc/lib/U1copy_from

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
   3 *
   4 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
   5 */
   6
   7#define EX_LD(x,y)              \
   898:     x;                      \
   9        .section __ex_table,"a";\
  10        .align 4;               \
  11        .word 98b, y;           \
  12        .text;                  \
  13        .align 4;
  14
  15#define EX_LD_FP(x,y)           \
  1698:     x;                      \
  17        .section __ex_table,"a";\
  18        .align 4;               \
  19        .word 98b, y;           \
  20        .text;                  \
  21        .align 4;
  22
  23#define FUNC_NAME               raw_copy_from_user
  24#define LOAD(type,addr,dest)    type##a [addr] %asi, dest
  25#define LOAD_BLK(addr,dest)     ldda [addr] ASI_BLK_AIUS, dest
  26#define EX_RETVAL(x)            0
  27
  28        /* Writing to %asi is _expensive_ so we hardcode it.
  29         * Reading %asi to check for KERNEL_DS is comparatively
  30         * cheap.
  31         */
  32#define PREAMBLE                                        \
  33        rd              %asi, %g1;                      \
  34        cmp             %g1, ASI_AIUS;                  \
  35        bne,pn          %icc, raw_copy_in_user;         \
  36         nop;                                           \
  37
  38#include "U1memcpy.S"
  39