QEMU With E2K User Support
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qemu-e2k/page-vary-common.c

53 lines
1.6 KiB

/*
* Variable page size handling -- target independent part.
*
* 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/>.
*/
#define IN_PAGE_VARY 1
#include "qemu/osdep.h"
#include "exec/page-vary.h"
/* WARNING: This file must *not* be complied with -flto. */
TargetPageBits target_page;
bool set_preferred_target_page_bits_common(int bits)
{
/*
* The target page size is the lowest common denominator for all
* the CPUs in the system, so we can only make it smaller, never
* larger. And we can't make it smaller once we've committed to
* a particular size.
*/
if (target_page.bits == 0 || target_page.bits > bits) {
if (target_page.decided) {
return false;
}
target_page.bits = bits;
}
return true;
}
void finalize_target_page_bits_common(int min)
{
if (target_page.bits == 0) {
target_page.bits = min;
}
target_page.mask = -1ull << target_page.bits;
target_page.decided = true;
}