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_XLP)
  26
  27 extern void nlm_cop2_save(struct nlm_cop2_state *);
  28 extern void nlm_cop2_restore(struct nlm_cop2_state *);
  29
  30 #define cop2_save(r)            nlm_cop2_save(&(r)->thread.cp2)
  31 #define cop2_restore(r)         nlm_cop2_restore(&(r)->thread.cp2)
  32
  33 #define cop2_present            1
  34 #define cop2_lazy_restore       0
  35
  36 #elif defined(CONFIG_CPU_LOONGSON3)
  37
  38 #define cop2_present            1
  39 #define cop2_lazy_restore       1
  40 #define cop2_save(r)            do { (void)(r); } while (0)
  41 #define cop2_restore(r)         do { (void)(r); } while (0)
  42
  43 #else
  44
  45 #define cop2_present            0
  46 #define cop2_lazy_restore       0
  47 #define cop2_save(r)            do { (void)(r); } while (0)
  48 #define cop2_restore(r)         do { (void)(r); } while (0)
  49 #endif
  50
  51 enum cu2_ops {
  52         CU2_EXCEPTION,
  53         CU2_LWC2_OP,
  54         CU2_LDC2_OP,
  55         CU2_SWC2_OP,
  56         CU2_SDC2_OP,
  57 };
  58
  59 extern int register_cu2_notifier(struct notifier_block *nb);
  60 extern int cu2_notifier_call_chain(unsigned long val, void *v);
  61
  62 #define cu2_notifier(fn, pri)                                           \
  63 ({                                                                      \
  64         static struct notifier_block fn##_nb = {                        \
  65                 .notifier_call = fn,                                    \
  66                 .priority = pri                                         \
  67         };                                                              \
  68                                                                         \
  69         register_cu2_notifier(&fn##_nb);                                \
  70 })
  71
  72 #endif /* __ASM_COP2_H */