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-rw-r--r--arch/arm26/mm/memc.c184
1 files changed, 0 insertions, 184 deletions
diff --git a/arch/arm26/mm/memc.c b/arch/arm26/mm/memc.c
deleted file mode 100644
index ffecd857824..00000000000
--- a/arch/arm26/mm/memc.c
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * linux/arch/arm26/mm/memc.c
- *
- * Copyright (C) 1998-2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Page table sludge for older ARM processor architectures.
- */
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>
-
-#include <asm/pgtable.h>
-#include <asm/pgalloc.h>
-#include <asm/page.h>
-#include <asm/memory.h>
-#include <asm/hardware.h>
-
-#include <asm/map.h>
-
-#define MEMC_TABLE_SIZE (256*sizeof(unsigned long))
-
-struct kmem_cache *pte_cache, *pgd_cache;
-int page_nr;
-
-/*
- * Allocate space for a page table and a MEMC table.
- * Note that we place the MEMC
- * table before the page directory. This means we can
- * easily get to both tightly-associated data structures
- * with a single pointer.
- */
-static inline pgd_t *alloc_pgd_table(void)
-{
- void *pg2k = kmem_cache_alloc(pgd_cache, GFP_KERNEL);
-
- if (pg2k)
- pg2k += MEMC_TABLE_SIZE;
-
- return (pgd_t *)pg2k;
-}
-
-/*
- * Free a page table. this function is the counterpart to get_pgd_slow
- * below, not alloc_pgd_table above.
- */
-void free_pgd_slow(pgd_t *pgd)
-{
- unsigned long tbl = (unsigned long)pgd;
-
- tbl -= MEMC_TABLE_SIZE;
-
- kmem_cache_free(pgd_cache, (void *)tbl);
-}
-
-/*
- * Allocate a new pgd and fill it in ready for use
- *
- * A new tasks pgd is completely empty (all pages !present) except for:
- *
- * o The machine vectors at virtual address 0x0
- * o The vmalloc region at the top of address space
- *
- */
-#define FIRST_KERNEL_PGD_NR (FIRST_USER_PGD_NR + USER_PTRS_PER_PGD)
-
-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 = alloc_pgd_table();
- if (!new_pgd)
- goto no_pgd;
-
- /*
- * On ARM, first page must always be allocated since it contains
- * the machine vectors.
- */
- new_pmd = pmd_alloc(mm, 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_pgd = pgd_offset(&init_mm, 0);
- init_pmd = pmd_offset(init_pgd, 0);
- init_pte = pte_offset(init_pmd, 0);
-
- set_pte(new_pte, *init_pte);
- pte_unmap(new_pte);
-
- /*
- * the page table entries are zeroed
- * when the table is created. (see the cache_ctor functions below)
- * Now we need to plonk the kernel (vmalloc) area at the end of
- * the address space. We copy this from the init thread, just like
- * the init_pte we copied above...
- */
- memcpy(new_pgd + FIRST_KERNEL_PGD_NR, init_pgd + FIRST_KERNEL_PGD_NR,
- (PTRS_PER_PGD - FIRST_KERNEL_PGD_NR) * sizeof(pgd_t));
-
- /* update MEMC tables */
- cpu_memc_update_all(new_pgd);
- return new_pgd;
-
-no_pte:
- pmd_free(new_pmd);
-no_pmd:
- free_pgd_slow(new_pgd);
-no_pgd:
- return NULL;
-}
-
-/*
- * No special code is required here.
- */
-void setup_mm_for_reboot(char mode)
-{
-}
-
-/*
- * This contains the code to setup the memory map on an ARM2/ARM250/ARM3
- * o swapper_pg_dir = 0x0207d000
- * o kernel proper starts at 0x0208000
- * o create (allocate) a pte to contain the machine vectors
- * o populate the pte (points to 0x02078000) (FIXME - is it zeroed?)
- * o populate the init tasks page directory (pgd) with the new pte
- * o zero the rest of the init tasks pgdir (FIXME - what about vmalloc?!)
- */
-void __init memtable_init(struct meminfo *mi)
-{
- pte_t *pte;
- int i;
-
- page_nr = max_low_pfn;
-
- pte = alloc_bootmem_low_pages(PTRS_PER_PTE * sizeof(pte_t));
- pte[0] = mk_pte_phys(PAGE_OFFSET + SCREEN_SIZE, PAGE_READONLY);
- pmd_populate(&init_mm, pmd_offset(swapper_pg_dir, 0), pte);
-
- for (i = 1; i < PTRS_PER_PGD; i++)
- pgd_val(swapper_pg_dir[i]) = 0;
-}
-
-void __init iotable_init(struct map_desc *io_desc)
-{
- /* nothing to do */
-}
-
-/*
- * We never have holes in the memmap
- */
-void __init create_memmap_holes(struct meminfo *mi)
-{
-}
-
-static void pte_cache_ctor(void *pte, struct kmem_cache *cache, unsigned long flags)
-{
- memzero(pte, sizeof(pte_t) * PTRS_PER_PTE);
-}
-
-static void pgd_cache_ctor(void *pgd, struct kmem_cache *cache, unsigned long flags)
-{
- memzero(pgd + MEMC_TABLE_SIZE, USER_PTRS_PER_PGD * sizeof(pgd_t));
-}
-
-void __init pgtable_cache_init(void)
-{
- pte_cache = kmem_cache_create("pte-cache",
- sizeof(pte_t) * PTRS_PER_PTE,
- 0, SLAB_PANIC, pte_cache_ctor);
-
- pgd_cache = kmem_cache_create("pgd-cache", MEMC_TABLE_SIZE +
- sizeof(pgd_t) * PTRS_PER_PGD,
- 0, SLAB_PANIC, pgd_cache_ctor);
-}