fpu_emulator.h

Go to the documentation of this file.

/*
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Further private data for which no space exists in mips_fpu_struct.
 * This should be subsumed into the mips_fpu_struct structure as
 * defined in processor.h as soon as the absurd wired absolute assembler
 * offsets become dynamic at compile time.
 *
 * Kevin D. Kissell, [email protected] and Carsten Langgaard, [email protected]
 * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
 */
#ifndef _ASM_FPU_EMULATOR_H
#define _ASM_FPU_EMULATOR_H

#include <asm/break.h>
#include <asm/inst.h>
#include <asm/local.h>

#ifdef CONFIG_DEBUG_FS

struct mips_fpu_emulator_stats {
    local_t emulated;
    local_t loads;
    local_t stores;
    local_t cp1ops;
    local_t cp1xops;
    local_t errors;
};

DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);

#define MIPS_FPU_EMU_INC_STATS(M)                   \
do {                                    \
    preempt_disable();                      \
    __local_inc(&__get_cpu_var(fpuemustats).M);         \
    preempt_enable();                       \
} while (0)

#else
#define MIPS_FPU_EMU_INC_STATS(M) do { } while (0)
#endif /* CONFIG_DEBUG_FS */

extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
    unsigned long cpc);
extern int do_dsemulret(struct pt_regs *xcp);

/*
 * Instruction inserted following the badinst to further tag the sequence
 */
#define BD_COOKIE 0x0000bd36    /* tne $0, $0 with baggage */

/*
 * Break instruction with special math emu break code set
 */
#define BREAK_MATH (0x0000000d | (BRK_MEMU << 16))

#endif /* _ASM_FPU_EMULATOR_H */