xref: /openbmc/linux/arch/mips/include/asm/cop2.h (revision 95b8a5e0)
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) 2009 Wind River Systems,
7  *   written by Ralf Baechle <ralf@linux-mips.org>
8  */
9 #ifndef __ASM_COP2_H
10 #define __ASM_COP2_H
11 
12 #include <linux/notifier.h>
13 
14 #if defined(CONFIG_CPU_CAVIUM_OCTEON)
15 
16 extern void octeon_cop2_save(struct octeon_cop2_state *);
17 extern void octeon_cop2_restore(struct octeon_cop2_state *);
18 
19 #define cop2_save(r)		octeon_cop2_save(&(r)->thread.cp2)
20 #define cop2_restore(r)		octeon_cop2_restore(&(r)->thread.cp2)
21 
22 #define cop2_present		1
23 #define cop2_lazy_restore	1
24 
25 #elif defined(CONFIG_CPU_LOONGSON64)
26 
27 #define cop2_present		1
28 #define cop2_lazy_restore	1
29 #define cop2_save(r)		do { (void)(r); } while (0)
30 #define cop2_restore(r)		do { (void)(r); } while (0)
31 
32 #else
33 
34 #define cop2_present		0
35 #define cop2_lazy_restore	0
36 #define cop2_save(r)		do { (void)(r); } while (0)
37 #define cop2_restore(r)		do { (void)(r); } while (0)
38 #endif
39 
40 enum cu2_ops {
41 	CU2_EXCEPTION,
42 	CU2_LWC2_OP,
43 	CU2_LDC2_OP,
44 	CU2_SWC2_OP,
45 	CU2_SDC2_OP,
46 };
47 
48 extern int register_cu2_notifier(struct notifier_block *nb);
49 extern int cu2_notifier_call_chain(unsigned long val, void *v);
50 
51 #define cu2_notifier(fn, pri)						\
52 ({									\
53 	static struct notifier_block fn##_nb = {			\
54 		.notifier_call = fn,					\
55 		.priority = pri						\
56 	};								\
57 									\
58 	register_cu2_notifier(&fn##_nb);				\
59 })
60 
61 #endif /* __ASM_COP2_H */
62