nds32: Remove the architecture

[linux-2.6-microblaze.git] / arch / nds32 / mm / mm-nds32.c

diff --git a/arch/nds32/mm/mm-nds32.c b/arch/nds32/mm/mm-nds32.c
deleted file mode 100644 (file)
index f2778f2..0000000
--- a/arch/nds32/mm/mm-nds32.c
+++ /dev/null
@@ -1,96 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/init_task.h>
-
-#define __HAVE_ARCH_PGD_FREE
-#include <asm/pgalloc.h>
-
-#define FIRST_KERNEL_PGD_NR    (USER_PTRS_PER_PGD)
-
-/*
- * need to get a page for level 1
- */
-
-pgd_t *pgd_alloc(struct mm_struct *mm)
-{
-       pgd_t *new_pgd, *init_pgd;
-       int i;
-
-       new_pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, 0);
-       if (!new_pgd)
-               return NULL;
-       for (i = 0; i < PTRS_PER_PGD; i++) {
-               (*new_pgd) = 1;
-               new_pgd++;
-       }
-       new_pgd -= PTRS_PER_PGD;
-
-       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));
-
-       cpu_dcache_wb_range((unsigned long)new_pgd,
-                           (unsigned long)new_pgd +
-                           PTRS_PER_PGD * sizeof(pgd_t));
-       inc_lruvec_page_state(virt_to_page((unsigned long *)new_pgd),
-                             NR_PAGETABLE);
-
-       return new_pgd;
-}
-
-void pgd_free(struct mm_struct *mm, pgd_t * pgd)
-{
-       pmd_t *pmd;
-       struct page *pte;
-
-       if (!pgd)
-               return;
-
-       pmd = (pmd_t *) pgd;
-       if (pmd_none(*pmd))
-               goto free;
-       if (pmd_bad(*pmd)) {
-               pmd_ERROR(*pmd);
-               pmd_clear(pmd);
-               goto free;
-       }
-
-       pte = pmd_page(*pmd);
-       pmd_clear(pmd);
-       dec_lruvec_page_state(virt_to_page((unsigned long *)pgd), NR_PAGETABLE);
-       pte_free(mm, pte);
-       mm_dec_nr_ptes(mm);
-       pmd_free(mm, pmd);
-free:
-       free_pages((unsigned long)pgd, 0);
-}
-
-/*
- * In order to soft-boot, we need to insert a 1:1 mapping in place of
- * the user-mode pages.  This will then ensure that we have predictable
- * results when turning the mmu off
- */
-void setup_mm_for_reboot(char mode)
-{
-       unsigned long pmdval;
-       pgd_t *pgd;
-       p4d_t *p4d;
-       pud_t *pud;
-       pmd_t *pmd;
-       int i;
-
-       if (current->mm && current->mm->pgd)
-               pgd = current->mm->pgd;
-       else
-               pgd = init_mm.pgd;
-
-       for (i = 0; i < USER_PTRS_PER_PGD; i++) {
-               pmdval = (i << PGDIR_SHIFT);
-               p4d = p4d_offset(pgd, i << PGDIR_SHIFT);
-               pud = pud_offset(p4d, i << PGDIR_SHIFT);
-               pmd = pmd_offset(pud + i, i << PGDIR_SHIFT);
-               set_pmd(pmd, __pmd(pmdval));
-       }
-}