arch/mips/kernel/signal-common.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) 1991, 1992  Linus Torvalds
   7  * Copyright (C) 1994 - 2000  Ralf Baechle
   8  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
   9  */
  10
  11 #ifndef __SIGNAL_COMMON_H
  12 #define __SIGNAL_COMMON_H
  13
  14 /* #define DEBUG_SIG */
  15
  16 #ifdef DEBUG_SIG
  17 #  define DEBUGP(fmt, args...) printk("%s: " fmt, __func__, ##args)
  18 #else
  19 #  define DEBUGP(fmt, args...)
  20 #endif
  21
  22 /*
  23  * Determine which stack to use..
  24  */
  25 extern void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
  26                                  size_t frame_size);
  27 /* Check and clear pending FPU exceptions in saved CSR */
  28 extern int fpcsr_pending(unsigned int __user *fpcsr);
  29
  30 /* Make sure we will not lose FPU ownership */
  31 #define lock_fpu_owner()        ({ preempt_disable(); pagefault_disable(); })
  32 #define unlock_fpu_owner()      ({ pagefault_enable(); preempt_enable(); })
  33
  34 /* Assembly functions to move context to/from the FPU */
  35 extern asmlinkage int
  36 _save_fp_context(void __user *fpregs, void __user *csr);
  37 extern asmlinkage int
  38 _restore_fp_context(void __user *fpregs, void __user *csr);
  39
  40 extern asmlinkage int _save_msa_all_upper(void __user *buf);
  41 extern asmlinkage int _restore_msa_all_upper(void __user *buf);
  42
  43 #endif  /* __SIGNAL_COMMON_H */