projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | * | |
| eae89076 AN |
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 | |
| 1da177e4 LT |
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 | ||
| e0cc3a42 | 26 | #include <linux/sched.h> |
| ba3049ed | 27 | #include <asm/break.h> |
| e0cc3a42 | 28 | #include <asm/thread_info.h> |
| ba3049ed | 29 | #include <asm/inst.h> |
| b6ee75ed | 30 | #include <asm/local.h> |
| e0cc3a42 | 31 | #include <asm/processor.h> |
| b6ee75ed DD |
32 | |
| 33 | #ifdef CONFIG_DEBUG_FS | |
| ba3049ed | 34 | |
| 4a99d1e2 | 35 | struct mips_fpu_emulator_stats { |
| d1cd39ad CL |
36 | unsigned long emulated; |
| 37 | unsigned long loads; | |
| 38 | unsigned long stores; | |
| 39 | unsigned long cp1ops; | |
| 40 | unsigned long cp1xops; | |
| 41 | unsigned long errors; | |
| 42 | unsigned long ieee754_inexact; | |
| 43 | unsigned long ieee754_underflow; | |
| 44 | unsigned long ieee754_overflow; | |
| 45 | unsigned long ieee754_zerodiv; | |
| 46 | unsigned long ieee754_invalidop; | |
| 1da177e4 LT |
47 | }; |
| 48 | ||
| b6ee75ed DD |
49 | DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats); |
| 50 | ||
| 51 | #define MIPS_FPU_EMU_INC_STATS(M) \ | |
| c948aca4 RB |
52 | do { \ |
| 53 | preempt_disable(); \ | |
| d1cd39ad | 54 | __this_cpu_inc(fpuemustats.M); \ |
| c948aca4 RB |
55 | preempt_enable(); \ |
| 56 | } while (0) | |
| b6ee75ed DD |
57 | |
| 58 | #else | |
| 59 | #define MIPS_FPU_EMU_INC_STATS(M) do { } while (0) | |
| 60 | #endif /* CONFIG_DEBUG_FS */ | |
| 0bd5d2e9 | 61 | |
| ba3049ed RB |
62 | extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir, |
| 63 | unsigned long cpc); | |
| 64 | extern int do_dsemulret(struct pt_regs *xcp); | |
| 102cedc3 LY |
65 | extern int fpu_emulator_cop1Handler(struct pt_regs *xcp, |
| 66 | struct mips_fpu_struct *ctx, int has_fpu, | |
| 67 | void *__user *fault_addr); | |
| 68 | int process_fpemu_return(int sig, void __user *fault_addr); | |
| 69 | int mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, | |
| 70 | unsigned long *contpc); | |
| ba3049ed RB |
71 | |
| 72 | /* | |
| 73 | * Instruction inserted following the badinst to further tag the sequence | |
| 74 | */ | |
| 75 | #define BD_COOKIE 0x0000bd36 /* tne $0, $0 with baggage */ | |
| 76 | ||
| 77 | /* | |
| 78 | * Break instruction with special math emu break code set | |
| 79 | */ | |
| 80 | #define BREAK_MATH (0x0000000d | (BRK_MEMU << 16)) | |
| 81 | ||
| e0cc3a42 RB |
82 | #define SIGNALLING_NAN 0x7ff800007ff80000LL |
| 83 | ||
| 84 | static inline void fpu_emulator_init_fpu(void) | |
| 85 | { | |
| 86 | struct task_struct *t = current; | |
| 87 | int i; | |
| 88 | ||
| 89 | t->thread.fpu.fcr31 = 0; | |
| 90 | ||
| 91 | for (i = 0; i < 32; i++) | |
| 92 | set_fpr64(&t->thread.fpu.fpr[i], 0, SIGNALLING_NAN); | |
| 93 | } | |
| 94 | ||
| 1da177e4 | 95 | #endif /* _ASM_FPU_EMULATOR_H */ |