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[PARISC] Delete arch/parisc/mm/kmap.c again
I deleted this file from 2.4 5 years ago. Unfortunately, that change never got merged to Linus and so when we switched to 2.5 it came back and nobody noticed. It's never been built in 2.5/2.6 as it was never in the Makefile. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
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Matthew Wilcox
Kyle McMartin
parent
c99767974e
commit
58554927f8
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/*
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* kmap/page table map and unmap support routines
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*
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* Copyright 1999,2000 Hewlett-Packard Company
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* Copyright 2000 John Marvin <jsm at hp.com>
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* Copyright 2000 Grant Grundler <grundler at parisc-linux.org>
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* Copyright 2000 Philipp Rumpf <prumpf@tux.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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** Stolen mostly from arch/parisc/kernel/pci-dma.c
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*/
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <asm/uaccess.h>
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#include <asm/pgalloc.h>
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#include <asm/io.h>
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#include <asm/page.h> /* get_order */
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#undef flush_cache_all
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#define flush_cache_all flush_all_caches
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typedef void (*pte_iterator_t) (pte_t * pte, unsigned long arg);
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#if 0
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/* XXX This routine could be used with iterate_page() to replace
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* unmap_uncached_page() and save a little code space but I didn't
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* do that since I'm not certain whether this is the right path. -PB
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*/
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static void unmap_cached_pte(pte_t * pte, unsigned long addr, unsigned long arg)
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{
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pte_t page = *pte;
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pte_clear(&init_mm, addr, pte);
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if (!pte_none(page)) {
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if (pte_present(page)) {
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unsigned long map_nr = pte_pagenr(page);
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if (map_nr < max_mapnr)
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__free_page(mem_map + map_nr);
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} else {
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printk(KERN_CRIT
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"Whee.. Swapped out page in kernel page table\n");
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}
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}
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}
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#endif
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/* These two routines should probably check a few things... */
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static void set_uncached(pte_t * pte, unsigned long arg)
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{
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pte_val(*pte) |= _PAGE_NO_CACHE;
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}
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static void set_cached(pte_t * pte, unsigned long arg)
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{
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pte_val(*pte) &= ~_PAGE_NO_CACHE;
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}
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static inline void iterate_pte(pmd_t * pmd, unsigned long address,
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unsigned long size, pte_iterator_t op,
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unsigned long arg)
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{
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pte_t *pte;
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unsigned long end;
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if (pmd_none(*pmd))
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return;
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if (pmd_bad(*pmd)) {
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pmd_ERROR(*pmd);
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pmd_clear(pmd);
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return;
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}
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pte = pte_offset(pmd, address);
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address &= ~PMD_MASK;
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end = address + size;
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if (end > PMD_SIZE)
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end = PMD_SIZE;
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do {
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op(pte, arg);
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address += PAGE_SIZE;
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pte++;
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} while (address < end);
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}
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static inline void iterate_pmd(pgd_t * dir, unsigned long address,
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unsigned long size, pte_iterator_t op,
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unsigned long arg)
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{
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pmd_t *pmd;
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unsigned long end;
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if (pgd_none(*dir))
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return;
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if (pgd_bad(*dir)) {
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pgd_ERROR(*dir);
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pgd_clear(dir);
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return;
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}
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pmd = pmd_offset(dir, address);
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address &= ~PGDIR_MASK;
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end = address + size;
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if (end > PGDIR_SIZE)
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end = PGDIR_SIZE;
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do {
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iterate_pte(pmd, address, end - address, op, arg);
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address = (address + PMD_SIZE) & PMD_MASK;
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pmd++;
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} while (address < end);
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}
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static void iterate_pages(unsigned long address, unsigned long size,
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pte_iterator_t op, unsigned long arg)
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{
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pgd_t *dir;
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unsigned long end = address + size;
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dir = pgd_offset_k(address);
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flush_cache_all();
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do {
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iterate_pmd(dir, address, end - address, op, arg);
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address = (address + PGDIR_SIZE) & PGDIR_MASK;
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dir++;
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} while (address && (address < end));
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flush_tlb_all();
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}
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void
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kernel_set_cachemode(unsigned long vaddr, unsigned long size, int what)
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{
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switch (what) {
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case IOMAP_FULL_CACHING:
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iterate_pages(vaddr, size, set_cached, 0);
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flush_tlb_range(NULL, vaddr, size);
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break;
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case IOMAP_NOCACHE_SER:
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iterate_pages(vaddr, size, set_uncached, 0);
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flush_tlb_range(NULL, vaddr, size);
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break;
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default:
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printk(KERN_CRIT
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"kernel_set_cachemode mode %d not understood\n",
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what);
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break;
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}
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}
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