mirror of https://gitee.com/openkylin/qemu.git
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
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/*
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* Variable page size handling -- target independent part.
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#define IN_PAGE_VARY 1
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#include "qemu/osdep.h"
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#include "exec/page-vary.h"
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/* WARNING: This file must *not* be complied with -flto. */
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TargetPageBits target_page;
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bool set_preferred_target_page_bits_common(int bits)
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{
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/*
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* The target page size is the lowest common denominator for all
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* the CPUs in the system, so we can only make it smaller, never
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* larger. And we can't make it smaller once we've committed to
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* a particular size.
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*/
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if (target_page.bits == 0 || target_page.bits > bits) {
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if (target_page.decided) {
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return false;
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}
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target_page.bits = bits;
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}
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return true;
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}
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void finalize_target_page_bits_common(int min)
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{
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if (target_page.bits == 0) {
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target_page.bits = min;
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}
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target_page.mask = -1ull << target_page.bits;
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target_page.decided = true;
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}
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