arch/mips/include/asm/cop2.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2009 Wind River Systems,
   7  *   written by Ralf Baechle <ralf@linux-mips.org>
   8  */
   9 #ifndef __ASM_COP2_H
  10 #define __ASM_COP2_H
  11
  12 #include <linux/notifier.h>
  13
  14 #if defined(CONFIG_CPU_CAVIUM_OCTEON)
  15
  16 extern void octeon_cop2_save(struct octeon_cop2_state *);
  17 extern void octeon_cop2_restore(struct octeon_cop2_state *);
  18
  19 #define cop2_save(r)            octeon_cop2_save(&(r)->thread.cp2)
  20 #define cop2_restore(r)         octeon_cop2_restore(&(r)->thread.cp2)
  21
  22 #define cop2_present            1
  23 #define cop2_lazy_restore       1
  24
  25 #elif defined(CONFIG_CPU_LOONGSON64)
  26
  27 #define cop2_present            1
  28 #define cop2_lazy_restore       1
  29 #define cop2_save(r)            do { (void)(r); } while (0)
  30 #define cop2_restore(r)         do { (void)(r); } while (0)
  31
  32 #else
  33
  34 #define cop2_present            0
  35 #define cop2_lazy_restore       0
  36 #define cop2_save(r)            do { (void)(r); } while (0)
  37 #define cop2_restore(r)         do { (void)(r); } while (0)
  38 #endif
  39
  40 enum cu2_ops {
  41         CU2_EXCEPTION,
  42         CU2_LWC2_OP,
  43         CU2_LDC2_OP,
  44         CU2_SWC2_OP,
  45         CU2_SDC2_OP,
  46 };
  47
  48 extern int register_cu2_notifier(struct notifier_block *nb);
  49 extern int cu2_notifier_call_chain(unsigned long val, void *v);
  50
  51 #define cu2_notifier(fn, pri)                                           \
  52 ({                                                                      \
  53         static struct notifier_block fn##_nb = {                        \
  54                 .notifier_call = fn,                                    \
  55                 .priority = pri                                         \
  56         };                                                              \
  57                                                                         \
  58         register_cu2_notifier(&fn##_nb);                                \
  59 })
  60
  61 #endif /* __ASM_COP2_H */