asm-extable.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_EXTABLE_H
 3#define __ASM_EXTABLE_H
 4
 5#include <linux/stringify.h>
 6#include <linux/bits.h>
 7#include <asm/asm-const.h>
 8
 9#define EX_TYPE_NONE		0
10#define EX_TYPE_FIXUP		1
11#define EX_TYPE_BPF		2
12#define EX_TYPE_UA_FAULT	3
13#define EX_TYPE_UA_LOAD_REG	5
14#define EX_TYPE_UA_LOAD_REGPAIR	6
15#define EX_TYPE_ZEROPAD		7
16#define EX_TYPE_FPC		8
17#define EX_TYPE_UA_MVCOS_TO	9
18#define EX_TYPE_UA_MVCOS_FROM	10
19
20#define EX_DATA_REG_ERR_SHIFT	0
21#define EX_DATA_REG_ERR		GENMASK(3, 0)
22
23#define EX_DATA_REG_ADDR_SHIFT	4
24#define EX_DATA_REG_ADDR	GENMASK(7, 4)
25
26#define EX_DATA_LEN_SHIFT	8
27#define EX_DATA_LEN		GENMASK(11, 8)
28
29#define __EX_TABLE(_section, _fault, _target, _type, _regerr, _regaddr, _len)	\
30	stringify_in_c(.section _section,"a";)					\
31	stringify_in_c(.balign	4;)						\
32	stringify_in_c(.long	(_fault) - .;)					\
33	stringify_in_c(.long	(_target) - .;)					\
34	stringify_in_c(.short	(_type);)					\
35	stringify_in_c(.macro	extable_reg regerr, regaddr;)			\
36	stringify_in_c(.set	.Lfound, 0;)					\
37	stringify_in_c(.set	.Lcurr, 0;)					\
38	stringify_in_c(.irp	rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;)	\
39	stringify_in_c(		.ifc	"\regerr", "%%r\rs";)			\
40	stringify_in_c(			.set	.Lfound, 1;)			\
41	stringify_in_c(			.set	.Lregerr, .Lcurr;)		\
42	stringify_in_c(		.endif;)					\
43	stringify_in_c(		.set	.Lcurr, .Lcurr+1;)			\
44	stringify_in_c(.endr;)							\
45	stringify_in_c(.ifne	(.Lfound != 1);)				\
46	stringify_in_c(		.error	"extable_reg: bad register argument1";)	\
47	stringify_in_c(.endif;)							\
48	stringify_in_c(.set	.Lfound, 0;)					\
49	stringify_in_c(.set	.Lcurr, 0;)					\
50	stringify_in_c(.irp	rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;)	\
51	stringify_in_c(		.ifc	"\regaddr", "%%r\rs";)			\
52	stringify_in_c(			.set	.Lfound, 1;)			\
53	stringify_in_c(			.set	.Lregaddr, .Lcurr;)		\
54	stringify_in_c(		.endif;)					\
55	stringify_in_c(		.set	.Lcurr, .Lcurr+1;)			\
56	stringify_in_c(.endr;)							\
57	stringify_in_c(.ifne	(.Lfound != 1);)				\
58	stringify_in_c(		.error	"extable_reg: bad register argument2";)	\
59	stringify_in_c(.endif;)							\
60	stringify_in_c(.short	.Lregerr << EX_DATA_REG_ERR_SHIFT |		\
61				.Lregaddr << EX_DATA_REG_ADDR_SHIFT |		\
62				_len << EX_DATA_LEN_SHIFT;)			\
63	stringify_in_c(.endm;)							\
64	stringify_in_c(extable_reg _regerr,_regaddr;)				\
65	stringify_in_c(.purgem	extable_reg;)					\
66	stringify_in_c(.previous)
67
68#define EX_TABLE(_fault, _target)					\
69	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP, __stringify(%%r0), __stringify(%%r0), 0)
70
71#define EX_TABLE_AMODE31(_fault, _target)				\
72	__EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP, __stringify(%%r0), __stringify(%%r0), 0)
73
74#define EX_TABLE_UA_FAULT(_fault, _target, _regerr)			\
75	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_FAULT, _regerr, _regerr, 0)
76
77#define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero)	\
78	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0)
79
80#define EX_TABLE_UA_LOAD_REGPAIR(_fault, _target, _regerr, _regzero)	\
81	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REGPAIR, _regerr, _regzero, 0)
82
83#define EX_TABLE_ZEROPAD(_fault, _target, _regdata, _regaddr)		\
84	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_ZEROPAD, _regdata, _regaddr, 0)
85
86#define EX_TABLE_FPC(_fault, _target)					\
87	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FPC, __stringify(%%r0), __stringify(%%r0), 0)
88
89#define EX_TABLE_UA_MVCOS_TO(_fault, _target)				\
90	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_MVCOS_TO, __stringify(%%r0), __stringify(%%r0), 0)
91
92#define EX_TABLE_UA_MVCOS_FROM(_fault, _target)				\
93	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_MVCOS_FROM, __stringify(%%r0), __stringify(%%r0), 0)
94
95#endif /* __ASM_EXTABLE_H */