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95 lines
2.9 KiB
95 lines
2.9 KiB
/* |
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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 <linux/sched.h> |
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#include <asm/break.h> |
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#include <asm/thread_info.h> |
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#include <asm/inst.h> |
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#include <asm/local.h> |
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#include <asm/processor.h> |
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#ifdef CONFIG_DEBUG_FS |
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struct mips_fpu_emulator_stats { |
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unsigned long emulated; |
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unsigned long loads; |
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unsigned long stores; |
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unsigned long cp1ops; |
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unsigned long cp1xops; |
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unsigned long errors; |
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unsigned long ieee754_inexact; |
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unsigned long ieee754_underflow; |
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unsigned long ieee754_overflow; |
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unsigned long ieee754_zerodiv; |
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unsigned long ieee754_invalidop; |
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unsigned long ds_emul; |
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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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__this_cpu_inc(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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unsigned long fcr31); |
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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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#define SIGNALLING_NAN 0x7ff800007ff80000LL |
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static inline void fpu_emulator_init_fpu(void) |
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{ |
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struct task_struct *t = current; |
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int i; |
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for (i = 0; i < 32; i++) |
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set_fpr64(&t->thread.fpu.fpr[i], 0, SIGNALLING_NAN); |
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} |
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#endif /* _ASM_FPU_EMULATOR_H */
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