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/arch/powerpc/include/asm/feature-fixups.h

https://github.com/aicjofs/android_kernel_lge_v500_20d
C Header | 187 lines | 133 code | 31 blank | 23 comment | 1 complexity | b5acd5b76601c2e7918aa57041cdccc6 MD5 | raw file
  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
 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 */
 20#if defined(CONFIG_PPC64) && !defined(__powerpc64__)
 21/* 64 bits kernel, 32 bits code (ie. vdso32) */
 22#define FTR_ENTRY_LONG		.llong
 23#define FTR_ENTRY_OFFSET	.long 0xffffffff; .long
 24#elif defined(CONFIG_PPC64)
 25#define FTR_ENTRY_LONG		.llong
 26#define FTR_ENTRY_OFFSET	.llong
 27#else
 28#define FTR_ENTRY_LONG		.long
 29#define FTR_ENTRY_OFFSET	.long
 30#endif
 31
 32#define START_FTR_SECTION(label)	label##1:
 33
 34#define FTR_SECTION_ELSE_NESTED(label)			\
 35label##2:						\
 36	.pushsection __ftr_alt_##label,"a";		\
 37	.align 2;					\
 38label##3:
 39
 40#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect)		\
 41label##4:							\
 42	.popsection;						\
 43	.pushsection sect,"a";					\
 44	.align 3;						\
 45label##5:							\
 46	FTR_ENTRY_LONG msk;					\
 47	FTR_ENTRY_LONG val;					\
 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	.ifgt (label##4b- label##3b)-(label##2b- label##1b);	\
 53	.error "Feature section else case larger than body";	\
 54	.endif;							\
 55	.popsection;
 56
 57
 58/* CPU feature dependent sections */
 59#define BEGIN_FTR_SECTION_NESTED(label)	START_FTR_SECTION(label)
 60#define BEGIN_FTR_SECTION		START_FTR_SECTION(97)
 61
 62#define END_FTR_SECTION_NESTED(msk, val, label) 		\
 63	FTR_SECTION_ELSE_NESTED(label)				\
 64	MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
 65
 66#define END_FTR_SECTION(msk, val)		\
 67	END_FTR_SECTION_NESTED(msk, val, 97)
 68
 69#define END_FTR_SECTION_IFSET(msk)	END_FTR_SECTION((msk), (msk))
 70#define END_FTR_SECTION_IFCLR(msk)	END_FTR_SECTION((msk), 0)
 71
 72/* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
 73#define FTR_SECTION_ELSE	FTR_SECTION_ELSE_NESTED(97)
 74#define ALT_FTR_SECTION_END_NESTED(msk, val, label)	\
 75	MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
 76#define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label)	\
 77	ALT_FTR_SECTION_END_NESTED(msk, msk, label)
 78#define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label)	\
 79	ALT_FTR_SECTION_END_NESTED(msk, 0, label)
 80#define ALT_FTR_SECTION_END(msk, val)	\
 81	ALT_FTR_SECTION_END_NESTED(msk, val, 97)
 82#define ALT_FTR_SECTION_END_IFSET(msk)	\
 83	ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97)
 84#define ALT_FTR_SECTION_END_IFCLR(msk)	\
 85	ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
 86
 87/* MMU feature dependent sections */
 88#define BEGIN_MMU_FTR_SECTION_NESTED(label)	START_FTR_SECTION(label)
 89#define BEGIN_MMU_FTR_SECTION			START_FTR_SECTION(97)
 90
 91#define END_MMU_FTR_SECTION_NESTED(msk, val, label) 		\
 92	FTR_SECTION_ELSE_NESTED(label)				\
 93	MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
 94
 95#define END_MMU_FTR_SECTION(msk, val)		\
 96	END_MMU_FTR_SECTION_NESTED(msk, val, 97)
 97
 98#define END_MMU_FTR_SECTION_IFSET(msk)	END_MMU_FTR_SECTION((msk), (msk))
 99#define END_MMU_FTR_SECTION_IFCLR(msk)	END_MMU_FTR_SECTION((msk), 0)
100
101/* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
102#define MMU_FTR_SECTION_ELSE_NESTED(label)	FTR_SECTION_ELSE_NESTED(label)
103#define MMU_FTR_SECTION_ELSE	MMU_FTR_SECTION_ELSE_NESTED(97)
104#define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label)	\
105	MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
106#define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label)	\
107	ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label)
108#define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label)	\
109	ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label)
110#define ALT_MMU_FTR_SECTION_END(msk, val)	\
111	ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97)
112#define ALT_MMU_FTR_SECTION_END_IFSET(msk)	\
113	ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97)
114#define ALT_MMU_FTR_SECTION_END_IFCLR(msk)	\
115	ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
116
117/* Firmware feature dependent sections */
118#define BEGIN_FW_FTR_SECTION_NESTED(label)	START_FTR_SECTION(label)
119#define BEGIN_FW_FTR_SECTION			START_FTR_SECTION(97)
120
121#define END_FW_FTR_SECTION_NESTED(msk, val, label) 		\
122	FTR_SECTION_ELSE_NESTED(label)				\
123	MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
124
125#define END_FW_FTR_SECTION(msk, val)		\
126	END_FW_FTR_SECTION_NESTED(msk, val, 97)
127
128#define END_FW_FTR_SECTION_IFSET(msk)	END_FW_FTR_SECTION((msk), (msk))
129#define END_FW_FTR_SECTION_IFCLR(msk)	END_FW_FTR_SECTION((msk), 0)
130
131/* Firmware feature sections with alternatives */
132#define FW_FTR_SECTION_ELSE_NESTED(label)	FTR_SECTION_ELSE_NESTED(label)
133#define FW_FTR_SECTION_ELSE	FTR_SECTION_ELSE_NESTED(97)
134#define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label)	\
135	MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
136#define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label)	\
137	ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label)
138#define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label)	\
139	ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label)
140#define ALT_FW_FTR_SECTION_END(msk, val)	\
141	ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97)
142#define ALT_FW_FTR_SECTION_END_IFSET(msk)	\
143	ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97)
144#define ALT_FW_FTR_SECTION_END_IFCLR(msk)	\
145	ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
146
147#ifndef __ASSEMBLY__
148
149#define ASM_FTR_IF(section_if, section_else, msk, val)	\
150	stringify_in_c(BEGIN_FTR_SECTION)			\
151	section_if "; "						\
152	stringify_in_c(FTR_SECTION_ELSE)			\
153	section_else "; "					\
154	stringify_in_c(ALT_FTR_SECTION_END((msk), (val)))
155
156#define ASM_FTR_IFSET(section_if, section_else, msk)	\
157	ASM_FTR_IF(section_if, section_else, (msk), (msk))
158
159#define ASM_FTR_IFCLR(section_if, section_else, msk)	\
160	ASM_FTR_IF(section_if, section_else, (msk), 0)
161
162#define ASM_MMU_FTR_IF(section_if, section_else, msk, val)	\
163	stringify_in_c(BEGIN_MMU_FTR_SECTION)			\
164	section_if "; "						\
165	stringify_in_c(MMU_FTR_SECTION_ELSE)			\
166	section_else "; "					\
167	stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val)))
168
169#define ASM_MMU_FTR_IFSET(section_if, section_else, msk)	\
170	ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk))
171
172#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk)	\
173	ASM_MMU_FTR_IF(section_if, section_else, (msk), 0)
174
175#endif /* __ASSEMBLY__ */
176
177/* LWSYNC feature sections */
178#define START_LWSYNC_SECTION(label)	label##1:
179#define MAKE_LWSYNC_SECTION_ENTRY(label, sect)		\
180label##2:						\
181	.pushsection sect,"a";				\
182	.align 2;					\
183label##3:					       	\
184	FTR_ENTRY_OFFSET label##1b-label##3b;		\
185	.popsection;
186
187#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */