arch/mips/include/asm/mips-r2-to-r6-emul.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (c) 2014 Imagination Technologies Ltd.
   7  * Author: Markos Chandras <markos.chandras@imgtec.com>
   8  */
   9
  10 #ifndef __ASM_MIPS_R2_TO_R6_EMUL_H
  11 #define __ASM_MIPS_R2_TO_R6_EMUL_H
  12
  13 struct mips_r2_emulator_stats {
  14         u64 movs;
  15         u64 hilo;
  16         u64 muls;
  17         u64 divs;
  18         u64 dsps;
  19         u64 bops;
  20         u64 traps;
  21         u64 fpus;
  22         u64 loads;
  23         u64 stores;
  24         u64 llsc;
  25         u64 dsemul;
  26 };
  27
  28 struct mips_r2br_emulator_stats {
  29         u64 jrs;
  30         u64 bltzl;
  31         u64 bgezl;
  32         u64 bltzll;
  33         u64 bgezll;
  34         u64 bltzall;
  35         u64 bgezall;
  36         u64 bltzal;
  37         u64 bgezal;
  38         u64 beql;
  39         u64 bnel;
  40         u64 blezl;
  41         u64 bgtzl;
  42 };
  43
  44 #ifdef CONFIG_DEBUG_FS
  45
  46 #define MIPS_R2_STATS(M)                                                \
  47 do {                                                                    \
  48         u32 nir;                                                        \
  49         int err;                                                        \
  50                                                                         \
  51         preempt_disable();                                              \
  52         __this_cpu_inc(mipsr2emustats.M);                               \
  53         err = __get_user(nir, (u32 __user *)regs->cp0_epc);             \
  54         if (!err) {                                                     \
  55                 if (nir == BREAK_MATH(0))                               \
  56                         __this_cpu_inc(mipsr2bdemustats.M);             \
  57         }                                                               \
  58         preempt_enable();                                               \
  59 } while (0)
  60
  61 #define MIPS_R2BR_STATS(M)                                      \
  62 do {                                                            \
  63         preempt_disable();                                      \
  64         __this_cpu_inc(mipsr2bremustats.M);                     \
  65         preempt_enable();                                       \
  66 } while (0)
  67
  68 #else
  69
  70 #define MIPS_R2_STATS(M)          do { } while (0)
  71 #define MIPS_R2BR_STATS(M)        do { } while (0)
  72
  73 #endif /* CONFIG_DEBUG_FS */
  74
  75 struct r2_decoder_table {
  76         u32     mask;
  77         u32     code;
  78         int     (*func)(struct pt_regs *regs, u32 inst);
  79 };
  80
  81
  82 extern void do_trap_or_bp(struct pt_regs *regs, unsigned int code, int si_code,
  83                           const char *str);
  84
  85 #ifndef CONFIG_MIPSR2_TO_R6_EMULATOR
  86 static int mipsr2_emulation;
  87 static inline int mipsr2_decoder(struct pt_regs *regs, u32 inst,
  88                                  unsigned long *fcr31)
  89 {
  90         return 0;
  91 };
  92 #else
  93 /* MIPS R2 Emulator ON/OFF */
  94 extern int mipsr2_emulation;
  95 extern int mipsr2_decoder(struct pt_regs *regs, u32 inst,
  96                           unsigned long *fcr31);
  97 #endif /* CONFIG_MIPSR2_TO_R6_EMULATOR */
  98
  99 #define NO_R6EMU        (cpu_has_mips_r6 && !mipsr2_emulation)
 100
 101 #endif /* __ASM_MIPS_R2_TO_R6_EMUL_H */