1/******************************************************************************
  2 * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
  3 *                    VA Linux Systems Japan K.K.
  4 *
  5 * This program is free software; you can redistribute it and/or modify
  6 * it under the terms of the GNU General Public License as published by
  7 * the Free Software Foundation; either version 2 of the License, or
  8 * (at your option) any later version.
  9 *
 10 * This program is distributed in the hope that it will be useful,
 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13 * GNU General Public License for more details.
 14 *
 15 * You should have received a copy of the GNU General Public License
 16 * along with this program; if not, write to the Free Software
 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 18 *
 19 */
 20
 21#ifndef __ASM_PARAVIRT_PATCH_H
 22#define __ASM_PARAVIRT_PATCH_H
 23
 24#ifdef __ASSEMBLY__
 25
 26	.section .paravirt_branches, "a"
 27	.previous
 28#define PARAVIRT_PATCH_SITE_BR(type)		\
 29	{					\
 30	[1:] ;					\
 31	br.cond.sptk.many 2f ;			\
 32	nop.b 0 ;				\
 33	nop.b 0;; ;				\
 34	} ;					\
 35	2:					\
 36	.xdata8 ".paravirt_branches", 1b, type
 37
 38#else
 39
 40#include <linux/stringify.h>
 41#include <asm/intrinsics.h>
 42
 43/* for binary patch */
 44struct paravirt_patch_site_bundle {
 45	void		*sbundle;
 46	void		*ebundle;
 47	unsigned long	type;
 48};
 49
 50/* label means the beginning of new bundle */
 51#define paravirt_alt_bundle(instr, privop)				\
 52	"\t998:\n"							\
 53	"\t" instr "\n"							\
 54	"\t999:\n"							\
 55	"\t.pushsection .paravirt_bundles, \"a\"\n"			\
 56	"\t.popsection\n"						\
 57	"\t.xdata8 \".paravirt_bundles\", 998b, 999b, "			\
 58	__stringify(privop) "\n"
 59
 60
 61struct paravirt_patch_bundle_elem {
 62	const void	*sbundle;
 63	const void	*ebundle;
 64	unsigned long	type;
 65};
 66
 67
 68struct paravirt_patch_site_inst {
 69	unsigned long	stag;
 70	unsigned long	etag;
 71	unsigned long	type;
 72};
 73
 74#define paravirt_alt_inst(instr, privop)				\
 75	"\t[998:]\n"							\
 76	"\t" instr "\n"							\
 77	"\t[999:]\n"							\
 78	"\t.pushsection .paravirt_insts, \"a\"\n"			\
 79	"\t.popsection\n"						\
 80	"\t.xdata8 \".paravirt_insts\", 998b, 999b, "			\
 81	__stringify(privop) "\n"
 82
 83struct paravirt_patch_site_branch {
 84	unsigned long	tag;
 85	unsigned long	type;
 86};
 87
 88struct paravirt_patch_branch_target {
 89	const void	*entry;
 90	unsigned long	type;
 91};
 92
 93void
 94__paravirt_patch_apply_branch(
 95	unsigned long tag, unsigned long type,
 96	const struct paravirt_patch_branch_target *entries,
 97	unsigned int nr_entries);
 98
 99void
100paravirt_patch_reloc_br(unsigned long tag, const void *target);
101
102void
103paravirt_patch_reloc_brl(unsigned long tag, const void *target);
104
105
106#if defined(ASM_SUPPORTED) && defined(CONFIG_PARAVIRT)
107unsigned long
108ia64_native_patch_bundle(void *sbundle, void *ebundle, unsigned long type);
109
110unsigned long
111__paravirt_patch_apply_bundle(void *sbundle, void *ebundle, unsigned long type,
112			      const struct paravirt_patch_bundle_elem *elems,
113			      unsigned long nelems,
114			      const struct paravirt_patch_bundle_elem **found);
115
116void
117paravirt_patch_apply_bundle(const struct paravirt_patch_site_bundle *start,
118			    const struct paravirt_patch_site_bundle *end);
119
120void
121paravirt_patch_apply_inst(const struct paravirt_patch_site_inst *start,
122			  const struct paravirt_patch_site_inst *end);
123
124void paravirt_patch_apply(void);
125#else
126#define paravirt_patch_apply_bundle(start, end)	do { } while (0)
127#define paravirt_patch_apply_inst(start, end)	do { } while (0)
128#define paravirt_patch_apply()			do { } while (0)
129#endif
130
131#endif /* !__ASSEMBLEY__ */
132
133#endif /* __ASM_PARAVIRT_PATCH_H */
134
135/*
136 * Local variables:
137 * mode: C
138 * c-set-style: "linux"
139 * c-basic-offset: 8
140 * tab-width: 8
141 * indent-tabs-mode: t
142 * End:
143 */