[mirror_ubuntu-artful-kernel.git] / arch / powerpc / include / asm / feature-fixups.h

#ifndef __ASM_POWERPC_FEATURE_FIXUPS_H
#define __ASM_POWERPC_FEATURE_FIXUPS_H

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

/*
 * Feature section common macros
 *
 * Note that the entries now contain offsets between the table entry
 * and the code rather than absolute code pointers in order to be
 * useable with the vdso shared library. There is also an assumption
 * that values will be negative, that is, the fixup table has to be
 * located after the code it fixes up.
 */
#if defined(CONFIG_PPC64) && !defined(__powerpc64__)
/* 64 bits kernel, 32 bits code (ie. vdso32) */
#define FTR_ENTRY_LONG		.llong
#define FTR_ENTRY_OFFSET	.long 0xffffffff; .long
#elif defined(CONFIG_PPC64)
#define FTR_ENTRY_LONG		.llong
#define FTR_ENTRY_OFFSET	.llong
#else
#define FTR_ENTRY_LONG		.long
#define FTR_ENTRY_OFFSET	.long
#endif

#define START_FTR_SECTION(label)	label##1:

#define FTR_SECTION_ELSE_NESTED(label)			\
label##2:						\
	.pushsection __ftr_alt_##label,"a";		\
	.align 2;					\
label##3:

#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect)	\
label##4:						\
	.popsection;					\
	.pushsection sect,"a";				\
	.align 3;					\
label##5:					       	\
	FTR_ENTRY_LONG msk;				\
	FTR_ENTRY_LONG val;				\
	FTR_ENTRY_OFFSET label##1b-label##5b;		\
	FTR_ENTRY_OFFSET label##2b-label##5b;	 	\
	FTR_ENTRY_OFFSET label##3b-label##5b;		\
	FTR_ENTRY_OFFSET label##4b-label##5b;	 	\
	.popsection;


/* CPU feature dependent sections */
#define BEGIN_FTR_SECTION_NESTED(label)	START_FTR_SECTION(label)
#define BEGIN_FTR_SECTION		START_FTR_SECTION(97)

#define END_FTR_SECTION_NESTED(msk, val, label) 		\
	FTR_SECTION_ELSE_NESTED(label)				\
	MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)

#define END_FTR_SECTION(msk, val)		\
	END_FTR_SECTION_NESTED(msk, val, 97)

#define END_FTR_SECTION_IFSET(msk)	END_FTR_SECTION((msk), (msk))
#define END_FTR_SECTION_IFCLR(msk)	END_FTR_SECTION((msk), 0)

/* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
#define FTR_SECTION_ELSE	FTR_SECTION_ELSE_NESTED(97)
#define ALT_FTR_SECTION_END_NESTED(msk, val, label)	\
	MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
#define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label)	\
	ALT_FTR_SECTION_END_NESTED(msk, msk, label)
#define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label)	\
	ALT_FTR_SECTION_END_NESTED(msk, 0, label)
#define ALT_FTR_SECTION_END(msk, val)	\
	ALT_FTR_SECTION_END_NESTED(msk, val, 97)
#define ALT_FTR_SECTION_END_IFSET(msk)	\
	ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97)
#define ALT_FTR_SECTION_END_IFCLR(msk)	\
	ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97)

/* MMU feature dependent sections */
#define BEGIN_MMU_FTR_SECTION_NESTED(label)	START_FTR_SECTION(label)
#define BEGIN_MMU_FTR_SECTION			START_FTR_SECTION(97)

#define END_MMU_FTR_SECTION_NESTED(msk, val, label) 		\
	FTR_SECTION_ELSE_NESTED(label)				\
	MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)

#define END_MMU_FTR_SECTION(msk, val)		\
	END_MMU_FTR_SECTION_NESTED(msk, val, 97)

#define END_MMU_FTR_SECTION_IFSET(msk)	END_MMU_FTR_SECTION((msk), (msk))
#define END_MMU_FTR_SECTION_IFCLR(msk)	END_MMU_FTR_SECTION((msk), 0)

/* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
#define MMU_FTR_SECTION_ELSE_NESTED(label)	FTR_SECTION_ELSE_NESTED(label)
#define MMU_FTR_SECTION_ELSE	MMU_FTR_SECTION_ELSE_NESTED(97)
#define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label)	\
	MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
#define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label)	\
	ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label)
#define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label)	\
	ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label)
#define ALT_MMU_FTR_SECTION_END(msk, val)	\
	ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97)
#define ALT_MMU_FTR_SECTION_END_IFSET(msk)	\
	ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97)
#define ALT_MMU_FTR_SECTION_END_IFCLR(msk)	\
	ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97)

/* Firmware feature dependent sections */
#define BEGIN_FW_FTR_SECTION_NESTED(label)	START_FTR_SECTION(label)
#define BEGIN_FW_FTR_SECTION			START_FTR_SECTION(97)

#define END_FW_FTR_SECTION_NESTED(msk, val, label) 		\
	FTR_SECTION_ELSE_NESTED(label)				\
	MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)

#define END_FW_FTR_SECTION(msk, val)		\
	END_FW_FTR_SECTION_NESTED(msk, val, 97)

#define END_FW_FTR_SECTION_IFSET(msk)	END_FW_FTR_SECTION((msk), (msk))
#define END_FW_FTR_SECTION_IFCLR(msk)	END_FW_FTR_SECTION((msk), 0)

/* Firmware feature sections with alternatives */
#define FW_FTR_SECTION_ELSE_NESTED(label)	FTR_SECTION_ELSE_NESTED(label)
#define FW_FTR_SECTION_ELSE	FTR_SECTION_ELSE_NESTED(97)
#define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label)	\
	MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
#define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label)	\
	ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label)
#define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label)	\
	ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label)
#define ALT_FW_FTR_SECTION_END(msk, val)	\
	ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97)
#define ALT_FW_FTR_SECTION_END_IFSET(msk)	\
	ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97)
#define ALT_FW_FTR_SECTION_END_IFCLR(msk)	\
	ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97)

#ifndef __ASSEMBLY__

#define ASM_MMU_FTR_IF(section_if, section_else, msk, val)	\
	stringify_in_c(BEGIN_MMU_FTR_SECTION)			\
	section_if "; "						\
	stringify_in_c(MMU_FTR_SECTION_ELSE)			\
	section_else "; "					\
	stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val)))

#define ASM_MMU_FTR_IFSET(section_if, section_else, msk)	\
	ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk))

#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk)	\
	ASM_MMU_FTR_IF(section_if, section_else, (msk), 0)

#endif /* __ASSEMBLY__ */

/* LWSYNC feature sections */
#define START_LWSYNC_SECTION(label)	label##1:
#define MAKE_LWSYNC_SECTION_ENTRY(label, sect)		\
label##2:						\
	.pushsection sect,"a";				\
	.align 2;					\
label##3:					       	\
	.long label##1b-label##3b;			\
	.popsection;

#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */
Commit	Line	Data
c5157e58 ME	1	#ifndef __ASM_POWERPC_FEATURE_FIXUPS_H
	2	#define __ASM_POWERPC_FEATURE_FIXUPS_H
	3
	4	/*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU General Public License
	7	* as published by the Free Software Foundation; either version
	8	* 2 of the License, or (at your option) any later version.
	9	*/
	10
c5157e58 ME	11	/*
	12	* Feature section common macros
	13	*
	14	* Note that the entries now contain offsets between the table entry
	15	* and the code rather than absolute code pointers in order to be
	16	* useable with the vdso shared library. There is also an assumption
	17	* that values will be negative, that is, the fixup table has to be
	18	* located after the code it fixes up.
	19	*/
c1137c37	20	#if defined(CONFIG_PPC64) && !defined(__powerpc64__)
c5157e58	21	/* 64 bits kernel, 32 bits code (ie. vdso32) */
c1137c37 ME	22	#define FTR_ENTRY_LONG .llong
c1137c37 ME	23	#define FTR_ENTRY_OFFSET .long 0xffffffff; .long
af20aeb1 MM	24	#elif defined(CONFIG_PPC64)
	25	#define FTR_ENTRY_LONG .llong
	26	#define FTR_ENTRY_OFFSET .llong
c1137c37	27	#else
af20aeb1 MM	28	#define FTR_ENTRY_LONG .long
af20aeb1 MM	29	#define FTR_ENTRY_OFFSET .long
c1137c37 ME	30	#endif
c1137c37 ME	31
fac23fe4 ME	32	#define START_FTR_SECTION(label) label##1:
	33
	34	#define FTR_SECTION_ELSE_NESTED(label) \
	35	label##2: \
	36	.pushsection __ftr_alt_##label,"a"; \
	37	.align 2; \
	38	label##3:
	39
c5157e58	40	#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \
fac23fe4 ME	41	label##4: \
	42	.popsection; \
	43	.pushsection sect,"a"; \
c5157e58	44	.align 3; \
fac23fe4	45	label##5: \
c1137c37 ME	46	FTR_ENTRY_LONG msk; \
c1137c37 ME	47	FTR_ENTRY_LONG val; \
fac23fe4 ME	48	FTR_ENTRY_OFFSET label##1b-label##5b; \
	49	FTR_ENTRY_OFFSET label##2b-label##5b; \
	50	FTR_ENTRY_OFFSET label##3b-label##5b; \
	51	FTR_ENTRY_OFFSET label##4b-label##5b; \
	52	.popsection;
c5157e58 ME	53
	54
	55	/* CPU feature dependent sections */
fac23fe4 ME	56	#define BEGIN_FTR_SECTION_NESTED(label) START_FTR_SECTION(label)
fac23fe4 ME	57	#define BEGIN_FTR_SECTION START_FTR_SECTION(97)
c5157e58	58
fac23fe4 ME	59	#define END_FTR_SECTION_NESTED(msk, val, label) \
fac23fe4 ME	60	FTR_SECTION_ELSE_NESTED(label) \
c5157e58 ME	61	MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
	62
	63	#define END_FTR_SECTION(msk, val) \
	64	END_FTR_SECTION_NESTED(msk, val, 97)
	65
	66	#define END_FTR_SECTION_IFSET(msk) END_FTR_SECTION((msk), (msk))
	67	#define END_FTR_SECTION_IFCLR(msk) END_FTR_SECTION((msk), 0)
	68
fac23fe4 ME	69	/* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
	70	#define FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97)
	71	#define ALT_FTR_SECTION_END_NESTED(msk, val, label) \
	72	MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
	73	#define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label) \
	74	ALT_FTR_SECTION_END_NESTED(msk, msk, label)
	75	#define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label) \
	76	ALT_FTR_SECTION_END_NESTED(msk, 0, label)
	77	#define ALT_FTR_SECTION_END(msk, val) \
	78	ALT_FTR_SECTION_END_NESTED(msk, val, 97)
	79	#define ALT_FTR_SECTION_END_IFSET(msk) \
	80	ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97)
	81	#define ALT_FTR_SECTION_END_IFCLR(msk) \
	82	ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
c5157e58	83
7c03d653 BH	84	/* MMU feature dependent sections */
	85	#define BEGIN_MMU_FTR_SECTION_NESTED(label) START_FTR_SECTION(label)
	86	#define BEGIN_MMU_FTR_SECTION START_FTR_SECTION(97)
	87
	88	#define END_MMU_FTR_SECTION_NESTED(msk, val, label) \
	89	FTR_SECTION_ELSE_NESTED(label) \
	90	MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
	91
	92	#define END_MMU_FTR_SECTION(msk, val) \
	93	END_MMU_FTR_SECTION_NESTED(msk, val, 97)
	94
	95	#define END_MMU_FTR_SECTION_IFSET(msk) END_MMU_FTR_SECTION((msk), (msk))
	96	#define END_MMU_FTR_SECTION_IFCLR(msk) END_MMU_FTR_SECTION((msk), 0)
	97
	98	/* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
	99	#define MMU_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label)
	100	#define MMU_FTR_SECTION_ELSE MMU_FTR_SECTION_ELSE_NESTED(97)
	101	#define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label) \
	102	MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
	103	#define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label) \
	104	ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label)
	105	#define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label) \
	106	ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label)
	107	#define ALT_MMU_FTR_SECTION_END(msk, val) \
	108	ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97)
	109	#define ALT_MMU_FTR_SECTION_END_IFSET(msk) \
	110	ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97)
	111	#define ALT_MMU_FTR_SECTION_END_IFCLR(msk) \
	112	ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
	113
c5157e58	114	/* Firmware feature dependent sections */
fac23fe4 ME	115	#define BEGIN_FW_FTR_SECTION_NESTED(label) START_FTR_SECTION(label)
fac23fe4 ME	116	#define BEGIN_FW_FTR_SECTION START_FTR_SECTION(97)
c5157e58	117
fac23fe4 ME	118	#define END_FW_FTR_SECTION_NESTED(msk, val, label) \
fac23fe4 ME	119	FTR_SECTION_ELSE_NESTED(label) \
c5157e58 ME	120	MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
	121
	122	#define END_FW_FTR_SECTION(msk, val) \
	123	END_FW_FTR_SECTION_NESTED(msk, val, 97)
	124
	125	#define END_FW_FTR_SECTION_IFSET(msk) END_FW_FTR_SECTION((msk), (msk))
	126	#define END_FW_FTR_SECTION_IFCLR(msk) END_FW_FTR_SECTION((msk), 0)
	127
fac23fe4 ME	128	/* Firmware feature sections with alternatives */
	129	#define FW_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label)
	130	#define FW_FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97)
	131	#define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label) \
	132	MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
	133	#define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label) \
	134	ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label)
	135	#define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label) \
	136	ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label)
	137	#define ALT_FW_FTR_SECTION_END(msk, val) \
	138	ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97)
	139	#define ALT_FW_FTR_SECTION_END_IFSET(msk) \
	140	ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97)
	141	#define ALT_FW_FTR_SECTION_END_IFCLR(msk) \
	142	ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
	143
af20aeb1 MM	144	#ifndef __ASSEMBLY__
	145
	146	#define ASM_MMU_FTR_IF(section_if, section_else, msk, val) \
	147	stringify_in_c(BEGIN_MMU_FTR_SECTION) \
	148	section_if "; " \
	149	stringify_in_c(MMU_FTR_SECTION_ELSE) \
	150	section_else "; " \
	151	stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val)))
	152
	153	#define ASM_MMU_FTR_IFSET(section_if, section_else, msk) \
	154	ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk))
	155
	156	#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk) \
	157	ASM_MMU_FTR_IF(section_if, section_else, (msk), 0)
	158
c5157e58 ME	159	#endif /* __ASSEMBLY__ */
c5157e58 ME	160
2d1b2027 KG	161	/* LWSYNC feature sections */
	162	#define START_LWSYNC_SECTION(label) label##1:
	163	#define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \
	164	label##2: \
	165	.pushsection sect,"a"; \
	166	.align 2; \
	167	label##3: \
	168	.long label##1b-label##3b; \
	169	.popsection;
	170
c5157e58	171	#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */