LXR linux/arch/sparc/lib/NG4copy_to

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* NG4copy_to_user.S: Niagara-4 optimized copy to userspace.
   3 *
   4 * Copyright (C) 2012 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#define EX_ST_FP(x,y)           \
  1698:     x;                      \
  17        .section __ex_table,"a";\
  18        .align 4;               \
  19        .word 98b, y##_fp;      \
  20        .text;                  \
  21        .align 4;
  22
  23#ifndef ASI_AIUS
  24#define ASI_AIUS        0x11
  25#endif
  26
  27#ifndef ASI_BLK_INIT_QUAD_LDD_AIUS
  28#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23
  29#endif
  30
  31#define FUNC_NAME               NG4copy_to_user
  32#define STORE(type,src,addr)    type##a src, [addr] %asi
  33#define STORE_ASI               ASI_BLK_INIT_QUAD_LDD_AIUS
  34#define EX_RETVAL(x)            0
  35
  36#ifdef __KERNEL__
  37        /* Writing to %asi is _expensive_ so we hardcode it.
  38         * Reading %asi to check for KERNEL_DS is comparatively
  39         * cheap.
  40         */
  41#define PREAMBLE                                        \
  42        rd              %asi, %g1;                      \
  43        cmp             %g1, ASI_AIUS;                  \
  44        bne,pn          %icc, raw_copy_in_user;         \
  45         nop
  46#endif
  47
  48#include "NG4memcpy.S"
  49