arch/arc/plat-eznps/ctop.c

   1 /*
   2  * Copyright(c) 2015 EZchip Technologies.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * The full GNU General Public License is included in this distribution in
  14  * the file called "COPYING".
  15  */
  16
  17 #include <linux/sched.h>
  18 #include <asm/processor.h>
  19 #include <plat/ctop.h>
  20
  21 void dp_save_restore(struct task_struct *prev, struct task_struct *next)
  22 {
  23         struct eznps_dp *prev_task_dp = &prev->thread.dp;
  24         struct eznps_dp *next_task_dp = &next->thread.dp;
  25
  26         /* Here we save all Data Plane related auxiliary registers */
  27         prev_task_dp->eflags = read_aux_reg(CTOP_AUX_EFLAGS);
  28         write_aux_reg(CTOP_AUX_EFLAGS, next_task_dp->eflags);
  29
  30         prev_task_dp->gpa1 = read_aux_reg(CTOP_AUX_GPA1);
  31         write_aux_reg(CTOP_AUX_GPA1, next_task_dp->gpa1);
  32 }