Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
120 lines
2.3 KiB
C
120 lines
2.3 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1999, 2000 by Silicon Graphics
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* Copyright (C) 2003 by Ralf Baechle
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*/
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#include <linux/export.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <asm/fixmap.h>
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#include <asm/pgalloc.h>
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#include <asm/tlbflush.h>
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void pgd_init(void *addr)
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{
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unsigned long *p, *end;
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unsigned long entry;
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#if !defined(__PAGETABLE_PUD_FOLDED)
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entry = (unsigned long)invalid_pud_table;
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#elif !defined(__PAGETABLE_PMD_FOLDED)
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entry = (unsigned long)invalid_pmd_table;
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#else
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entry = (unsigned long)invalid_pte_table;
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#endif
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p = (unsigned long *) addr;
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end = p + PTRS_PER_PGD;
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do {
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p[0] = entry;
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p[1] = entry;
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p[2] = entry;
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p[3] = entry;
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p[4] = entry;
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p += 8;
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p[-3] = entry;
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p[-2] = entry;
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p[-1] = entry;
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} while (p != end);
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}
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#ifndef __PAGETABLE_PMD_FOLDED
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void pmd_init(void *addr)
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{
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unsigned long *p, *end;
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unsigned long pagetable = (unsigned long)invalid_pte_table;
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p = (unsigned long *)addr;
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end = p + PTRS_PER_PMD;
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do {
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p[0] = pagetable;
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p[1] = pagetable;
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p[2] = pagetable;
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p[3] = pagetable;
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p[4] = pagetable;
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p += 8;
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p[-3] = pagetable;
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p[-2] = pagetable;
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p[-1] = pagetable;
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} while (p != end);
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}
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EXPORT_SYMBOL_GPL(pmd_init);
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#endif
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#ifndef __PAGETABLE_PUD_FOLDED
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void pud_init(void *addr)
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{
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unsigned long *p, *end;
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unsigned long pagetable = (unsigned long)invalid_pmd_table;
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p = (unsigned long *)addr;
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end = p + PTRS_PER_PUD;
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do {
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p[0] = pagetable;
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p[1] = pagetable;
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p[2] = pagetable;
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p[3] = pagetable;
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p[4] = pagetable;
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p += 8;
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p[-3] = pagetable;
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p[-2] = pagetable;
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p[-1] = pagetable;
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} while (p != end);
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}
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#endif
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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void set_pmd_at(struct mm_struct *mm, unsigned long addr,
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pmd_t *pmdp, pmd_t pmd)
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{
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*pmdp = pmd;
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}
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#endif
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void __init pagetable_init(void)
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{
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unsigned long vaddr;
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pgd_t *pgd_base;
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/* Initialize the entire pgd. */
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pgd_init(swapper_pg_dir);
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#ifndef __PAGETABLE_PUD_FOLDED
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pud_init(invalid_pud_table);
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#endif
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#ifndef __PAGETABLE_PMD_FOLDED
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pmd_init(invalid_pmd_table);
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#endif
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pgd_base = swapper_pg_dir;
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/*
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* Fixed mappings:
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*/
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vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
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fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
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}
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