LXR linux/arch/arm64/kernel/entry-fpsimd.S

   1/*
   2 * FP/SIMD state saving and restoring
   3 *
   4 * Copyright (C) 2012 ARM Ltd.
   5 * Author: Catalin Marinas <catalin.marinas@arm.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include <linux/linkage.h>
  21
  22#include <asm/assembler.h>
  23#include <asm/fpsimdmacros.h>
  24
  25/*
  26 * Save the FP registers.
  27 *
  28 * x0 - pointer to struct fpsimd_state
  29 */
  30ENTRY(fpsimd_save_state)
  31        fpsimd_save x0, 8
  32        ret
  33ENDPROC(fpsimd_save_state)
  34
  35/*
  36 * Load the FP registers.
  37 *
  38 * x0 - pointer to struct fpsimd_state
  39 */
  40ENTRY(fpsimd_load_state)
  41        fpsimd_restore x0, 8
  42        ret
  43ENDPROC(fpsimd_load_state)
  44
  45#ifdef CONFIG_ARM64_SVE
  46ENTRY(sve_save_state)
  47        sve_save 0, x1, 2
  48        ret
  49ENDPROC(sve_save_state)
  50
  51ENTRY(sve_load_state)
  52        sve_load 0, x1, x2, 3, x4
  53        ret
  54ENDPROC(sve_load_state)
  55
  56ENTRY(sve_get_vl)
  57        _sve_rdvl       0, 1
  58        ret
  59ENDPROC(sve_get_vl)
  60#endif /* CONFIG_ARM64_SVE */
  61