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;
mipsr2_decoder(struct pt_regs * regs,u32 inst,unsigned long * fcr31)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 */
102