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  */
  30 ENTRY(fpsimd_save_state)
  31         fpsimd_save x0, 8
  32         ret
  33 ENDPROC(fpsimd_save_state)
  34
  35 /*
  36  * Load the FP registers.
  37  *
  38  * x0 - pointer to struct fpsimd_state
  39  */
  40 ENTRY(fpsimd_load_state)
  41         fpsimd_restore x0, 8
  42         ret
  43 ENDPROC(fpsimd_load_state)
  44
  45 #ifdef CONFIG_KERNEL_MODE_NEON
  46
  47 /*
  48  * Save the bottom n FP registers.
  49  *
  50  * x0 - pointer to struct fpsimd_partial_state
  51  */
  52 ENTRY(fpsimd_save_partial_state)
  53         fpsimd_save_partial x0, 1, 8, 9
  54         ret
  55 ENDPROC(fpsimd_load_partial_state)
  56
  57 /*
  58  * Load the bottom n FP registers.
  59  *
  60  * x0 - pointer to struct fpsimd_partial_state
  61  */
  62 ENTRY(fpsimd_load_partial_state)
  63         fpsimd_restore_partial x0, 8, 9
  64         ret
  65 ENDPROC(fpsimd_load_partial_state)
  66
  67 #endif