diff options
Diffstat (limited to 'arch/unicore32/mm/pgd.c')
-rw-r--r-- | arch/unicore32/mm/pgd.c | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/arch/unicore32/mm/pgd.c b/arch/unicore32/mm/pgd.c deleted file mode 100644 index f01c73e04836..000000000000 --- a/arch/unicore32/mm/pgd.c +++ /dev/null @@ -1,102 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/mm/pgd.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/mm.h> -#include <linux/gfp.h> -#include <linux/highmem.h> - -#include <asm/pgalloc.h> -#include <asm/page.h> -#include <asm/tlbflush.h> - -#include "mm.h" - -#define FIRST_KERNEL_PGD_NR (FIRST_USER_PGD_NR + USER_PTRS_PER_PGD) - -/* - * need to get a 4k page for level 1 - */ -pgd_t *get_pgd_slow(struct mm_struct *mm) -{ - pgd_t *new_pgd, *init_pgd; - pmd_t *new_pmd, *init_pmd; - pte_t *new_pte, *init_pte; - - new_pgd = (pgd_t *)__get_free_pages(GFP_KERNEL, 0); - if (!new_pgd) - goto no_pgd; - - memset(new_pgd, 0, FIRST_KERNEL_PGD_NR * sizeof(pgd_t)); - - /* - * Copy over the kernel and IO PGD entries - */ - init_pgd = pgd_offset_k(0); - memcpy(new_pgd + FIRST_KERNEL_PGD_NR, init_pgd + FIRST_KERNEL_PGD_NR, - (PTRS_PER_PGD - FIRST_KERNEL_PGD_NR) * sizeof(pgd_t)); - - clean_dcache_area(new_pgd, PTRS_PER_PGD * sizeof(pgd_t)); - - if (!vectors_high()) { - /* - * On UniCore, first page must always be allocated since it - * contains the machine vectors. - */ - new_pmd = pmd_alloc(mm, (pud_t *)new_pgd, 0); - if (!new_pmd) - goto no_pmd; - - new_pte = pte_alloc_map(mm, new_pmd, 0); - if (!new_pte) - goto no_pte; - - init_pmd = pmd_offset((pud_t *)init_pgd, 0); - init_pte = pte_offset_map(init_pmd, 0); - set_pte(new_pte, *init_pte); - pte_unmap(init_pte); - pte_unmap(new_pte); - } - - return new_pgd; - -no_pte: - pmd_free(mm, new_pmd); - mm_dec_nr_pmds(mm); -no_pmd: - free_pages((unsigned long)new_pgd, 0); -no_pgd: - return NULL; -} - -void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd) -{ - pmd_t *pmd; - pgtable_t pte; - - if (!pgd) - return; - - /* pgd is always present and good */ - pmd = pmd_off(pgd, 0); - if (pmd_none(*pmd)) - goto free; - if (pmd_bad(*pmd)) { - pmd_ERROR(*pmd); - pmd_clear(pmd); - goto free; - } - - pte = pmd_pgtable(*pmd); - pmd_clear(pmd); - pte_free(mm, pte); - mm_dec_nr_ptes(mm); - pmd_free(mm, pmd); - mm_dec_nr_pmds(mm); -free: - free_pages((unsigned long) pgd, 0); -} |