From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/mips/mm/pgtable-32.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 arch/mips/mm/pgtable-32.c (limited to 'arch/mips/mm/pgtable-32.c') diff --git a/arch/mips/mm/pgtable-32.c b/arch/mips/mm/pgtable-32.c new file mode 100644 index 0000000000..84dd5136d5 --- /dev/null +++ b/arch/mips/mm/pgtable-32.c @@ -0,0 +1,89 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 by Ralf Baechle + */ +#include +#include +#include +#include +#include +#include +#include + +void pgd_init(void *addr) +{ + unsigned long *p = (unsigned long *)addr; + int i; + + for (i = 0; i < USER_PTRS_PER_PGD; i+=8) { + p[i + 0] = (unsigned long) invalid_pte_table; + p[i + 1] = (unsigned long) invalid_pte_table; + p[i + 2] = (unsigned long) invalid_pte_table; + p[i + 3] = (unsigned long) invalid_pte_table; + p[i + 4] = (unsigned long) invalid_pte_table; + p[i + 5] = (unsigned long) invalid_pte_table; + p[i + 6] = (unsigned long) invalid_pte_table; + p[i + 7] = (unsigned long) invalid_pte_table; + } +} + +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) +pmd_t mk_pmd(struct page *page, pgprot_t prot) +{ + pmd_t pmd; + + pmd_val(pmd) = (page_to_pfn(page) << PFN_PTE_SHIFT) | pgprot_val(prot); + + return pmd; +} + + +void set_pmd_at(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t pmd) +{ + *pmdp = pmd; +} +#endif /* defined(CONFIG_TRANSPARENT_HUGEPAGE) */ + +void __init pagetable_init(void) +{ + unsigned long vaddr; + pgd_t *pgd_base; +#ifdef CONFIG_HIGHMEM + pgd_t *pgd; + p4d_t *p4d; + pud_t *pud; + pmd_t *pmd; + pte_t *pte; +#endif + + /* Initialize the entire pgd. */ + pgd_init(swapper_pg_dir); + pgd_init(&swapper_pg_dir[USER_PTRS_PER_PGD]); + + pgd_base = swapper_pg_dir; + + /* + * Fixed mappings: + */ + vaddr = __fix_to_virt(__end_of_fixed_addresses - 1); + fixrange_init(vaddr & PMD_MASK, vaddr + FIXADDR_SIZE, pgd_base); + +#ifdef CONFIG_HIGHMEM + /* + * Permanent kmaps: + */ + vaddr = PKMAP_BASE; + fixrange_init(vaddr & PMD_MASK, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base); + + pgd = swapper_pg_dir + pgd_index(vaddr); + p4d = p4d_offset(pgd, vaddr); + pud = pud_offset(p4d, vaddr); + pmd = pmd_offset(pud, vaddr); + pte = pte_offset_kernel(pmd, vaddr); + pkmap_page_table = pte; +#endif +} -- cgit v1.2.3