102cedc32a
Add logic needed to do floating point emulation in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven. Hill@imgtec.com>
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Further private data for which no space exists in mips_fpu_struct.
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* This should be subsumed into the mips_fpu_struct structure as
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* defined in processor.h as soon as the absurd wired absolute assembler
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* offsets become dynamic at compile time.
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*
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* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
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*/
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#ifndef _ASM_FPU_EMULATOR_H
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#define _ASM_FPU_EMULATOR_H
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#include <asm/break.h>
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#include <asm/inst.h>
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#include <asm/local.h>
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#ifdef CONFIG_DEBUG_FS
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struct mips_fpu_emulator_stats {
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local_t emulated;
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local_t loads;
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local_t stores;
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local_t cp1ops;
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local_t cp1xops;
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local_t errors;
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};
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DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
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#define MIPS_FPU_EMU_INC_STATS(M) \
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do { \
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preempt_disable(); \
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__local_inc(&__get_cpu_var(fpuemustats).M); \
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preempt_enable(); \
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} while (0)
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#else
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#define MIPS_FPU_EMU_INC_STATS(M) do { } while (0)
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#endif /* CONFIG_DEBUG_FS */
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extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
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unsigned long cpc);
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extern int do_dsemulret(struct pt_regs *xcp);
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extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
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struct mips_fpu_struct *ctx, int has_fpu,
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void *__user *fault_addr);
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int process_fpemu_return(int sig, void __user *fault_addr);
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int mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
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unsigned long *contpc);
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/*
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* Instruction inserted following the badinst to further tag the sequence
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*/
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#define BD_COOKIE 0x0000bd36 /* tne $0, $0 with baggage */
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/*
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* Break instruction with special math emu break code set
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*/
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#define BREAK_MATH (0x0000000d | (BRK_MEMU << 16))
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#endif /* _ASM_FPU_EMULATOR_H */
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