arch/mips/include/asm/fpu_emulator.h

   1 /*
   2  *  This program is free software; you can distribute it and/or modify it
   3  *  under the terms of the GNU General Public License (Version 2) as
   4  *  published by the Free Software Foundation.
   5  *
   6  *  This program is distributed in the hope it will be useful, but WITHOUT
   7  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   8  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   9  *  for more details.
  10  *
  11  *  You should have received a copy of the GNU General Public License along
  12  *  with this program; if not, write to the Free Software Foundation, Inc.,
  13  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  14  *
  15  * Further private data for which no space exists in mips_fpu_struct.
  16  * This should be subsumed into the mips_fpu_struct structure as
  17  * defined in processor.h as soon as the absurd wired absolute assembler
  18  * offsets become dynamic at compile time.
  19  *
  20  * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
  21  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
  22  */
  23 #ifndef _ASM_FPU_EMULATOR_H
  24 #define _ASM_FPU_EMULATOR_H
  25
  26 #include <asm/break.h>
  27 #include <asm/inst.h>
  28 #include <asm/local.h>
  29
  30 #ifdef CONFIG_DEBUG_FS
  31
  32 struct mips_fpu_emulator_stats {
  33         local_t emulated;
  34         local_t loads;
  35         local_t stores;
  36         local_t cp1ops;
  37         local_t cp1xops;
  38         local_t errors;
  39 };
  40
  41 DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
  42
  43 #define MIPS_FPU_EMU_INC_STATS(M)                                       \
  44 do {                                                                    \
  45         preempt_disable();                                              \
  46         __local_inc(&__get_cpu_var(fpuemustats).M);                     \
  47         preempt_enable();                                               \
  48 } while (0)
  49
  50 #else
  51 #define MIPS_FPU_EMU_INC_STATS(M) do { } while (0)
  52 #endif /* CONFIG_DEBUG_FS */
  53
  54 extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
  55         unsigned long cpc);
  56 extern int do_dsemulret(struct pt_regs *xcp);
  57 extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
  58                                     struct mips_fpu_struct *ctx, int has_fpu,
  59                                     void *__user *fault_addr);
  60 int process_fpemu_return(int sig, void __user *fault_addr);
  61 int mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
  62                      unsigned long *contpc);
  63
  64 /*
  65  * Instruction inserted following the badinst to further tag the sequence
  66  */
  67 #define BD_COOKIE 0x0000bd36    /* tne $0, $0 with baggage */
  68
  69 /*
  70  * Break instruction with special math emu break code set
  71  */
  72 #define BREAK_MATH (0x0000000d | (BRK_MEMU << 16))
  73
  74 #endif /* _ASM_FPU_EMULATOR_H */