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
13struct 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
28struct 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)						\
47do {									\
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)					\
62do {								\
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
75struct r2_decoder_table {
76	u32     mask;
77	u32     code;
78	int     (*func)(struct pt_regs *regs, u32 inst);
79};
80
81
82extern 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
86static int mipsr2_emulation;
87static 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 */
94extern int mipsr2_emulation;
95extern 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