/******************************************************************************
* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/

#ifndef __ASM_PARAVIRT_PATCH_H
#define __ASM_PARAVIRT_PATCH_H

#ifdef __ASSEMBLY__

.section .paravirt_branches, "a"
.previous
#define PARAVIRT_PATCH_SITE_BR(type) \
{ \
[1:] ; \
br.cond.sptk.many 2f ; \
nop.b 0 ; \
nop.b 0;; ; \
} ; \
2: \
.xdata8 ".paravirt_branches", 1b, type

#else

#include <linux/stringify.h>
#include <asm/intrinsics.h>

/* for binary patch */
struct paravirt_patch_site_bundle {
void *sbundle;
void *ebundle;
unsigned long type;
};

/* label means the beginning of new bundle */
#define paravirt_alt_bundle(instr, privop) \
"\t998:\n" \
"\t" instr "\n" \
"\t999:\n" \
"\t.pushsection .paravirt_bundles, \"a\"\n" \
"\t.popsection\n" \
"\t.xdata8 \".paravirt_bundles\", 998b, 999b, " \
__stringify(privop) "\n"


struct paravirt_patch_bundle_elem {
const void *sbundle;
const void *ebundle;
unsigned long type;
};


struct paravirt_patch_site_inst {
unsigned long stag;
unsigned long etag;
unsigned long type;
};

#define paravirt_alt_inst(instr, privop) \
"\t[998:]\n" \
"\t" instr "\n" \
"\t[999:]\n" \
"\t.pushsection .paravirt_insts, \"a\"\n" \
"\t.popsection\n" \
"\t.xdata8 \".paravirt_insts\", 998b, 999b, " \
__stringify(privop) "\n"

struct paravirt_patch_site_branch {
unsigned long tag;
unsigned long type;
};

struct paravirt_patch_branch_target {
const void *entry;
unsigned long type;
};

void
__paravirt_patch_apply_branch(
unsigned long tag, unsigned long type,
const struct paravirt_patch_branch_target *entries,
unsigned int nr_entries);

void
paravirt_patch_reloc_br(unsigned long tag, const void *target);

void
paravirt_patch_reloc_brl(unsigned long tag, const void *target);


#if defined(ASM_SUPPORTED) && defined(CONFIG_PARAVIRT)
unsigned long
ia64_native_patch_bundle(void *sbundle, void *ebundle, unsigned long type);

unsigned long
__paravirt_patch_apply_bundle(void *sbundle, void *ebundle, unsigned long type,
const struct paravirt_patch_bundle_elem *elems,
unsigned long nelems,
const struct paravirt_patch_bundle_elem **found);

void
paravirt_patch_apply_bundle(const struct paravirt_patch_site_bundle *start,
const struct paravirt_patch_site_bundle *end);

void
paravirt_patch_apply_inst(const struct paravirt_patch_site_inst *start,
const struct paravirt_patch_site_inst *end);

void paravirt_patch_apply(void);
#else
#define paravirt_patch_apply_bundle(start, end) do { } while (0)
#define paravirt_patch_apply_inst(start, end) do { } while (0)
#define paravirt_patch_apply() do { } while (0)
#endif

#endif /* !__ASSEMBLEY__ */

#endif /* __ASM_PARAVIRT_PATCH_H */

/*
* Local variables:
* mode: C
* c-set-style: "linux"
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*/