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/*
* Definitions for cpus with variable page sizes.
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EXEC_PAGE_VARY_H
#define EXEC_PAGE_VARY_H
typedef struct {
bool decided;
int bits;
uint64_t mask;
} TargetPageBits;
#ifdef IN_PAGE_VARY
bool set_preferred_target_page_bits_common(int bits);
void finalize_target_page_bits_common(int min);
#endif
/**
* set_preferred_target_page_bits:
* @bits: number of bits needed to represent an address within the page
*
* Set the preferred target page size (the actual target page
* size may be smaller than any given CPU's preference).
* Returns true on success, false on failure (which can only happen
* if this is called after the system has already finalized its
* choice of page size and the requested page size is smaller than that).
*/
bool set_preferred_target_page_bits(int bits);
/**
* finalize_target_page_bits:
* Commit the final value set by set_preferred_target_page_bits.
*/
void finalize_target_page_bits(void);
/**
* migration_legacy_page_bits
*
* For migration compatibility with qemu v2.9, prior to the introduction
* of the configuration/target-page-bits section, return the value of
* TARGET_PAGE_BITS that the target had then.
*/
int migration_legacy_page_bits(void);
#endif /* EXEC_PAGE_VARY_H */
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