LXR linux/arch/mips/include/asm/fpu

   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
  32struct 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
  41DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
  42
  43#define MIPS_FPU_EMU_INC_STATS(M)                                       \
  44do {                                                                    \
  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
  54extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
  55        unsigned long cpc);
  56extern int do_dsemulret(struct pt_regs *xcp);
  57extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
  58                                    struct mips_fpu_struct *ctx, int has_fpu,
  59                                    void *__user *fault_addr);
  60int process_fpemu_return(int sig, void __user *fault_addr);
  61int 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 */
  75