patch-2.4.20 linux-2.4.20/arch/parisc/mm/kmap.c

• Lines: 144
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.19/arch/parisc/mm/kmap.c
• Orig date: Fri Feb 9 11:29:44 2001

diff -urN linux-2.4.19/arch/parisc/mm/kmap.c linux-2.4.20/arch/parisc/mm/kmap.c
@@ -1,143 +0,0 @@
-/*
-** Stolen mostly from arch/parisc/kernel/pci-dma.c
-*/
-
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/pci.h>
-
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include <asm/uaccess.h>
-#include <asm/pgalloc.h>
-
-#include <asm/io.h>
-#include <asm/page.h>		/* get_order */
-
-#undef flush_cache_all
-#define flush_cache_all flush_all_caches
-
-typedef void (*pte_iterator_t) (pte_t * pte, unsigned long arg);
-
-#if 0
-/* XXX This routine could be used with iterate_page() to replace
- * unmap_uncached_page() and save a little code space but I didn't
- * do that since I'm not certain whether this is the right path. -PB
- */
-static void unmap_cached_pte(pte_t * pte, unsigned long arg)
-{
-	pte_t page = *pte;
-	pte_clear(pte);
-	if (!pte_none(page)) {
-		if (pte_present(page)) {
-			unsigned long map_nr = pte_pagenr(page);
-			if (map_nr < max_mapnr)
-				__free_page(mem_map + map_nr);
-		} else {
-			printk(KERN_CRIT
-			       "Whee.. Swapped out page in kernel page table\n");
-		}
-	}
-}
-#endif
-
-/* These two routines should probably check a few things... */
-static void set_uncached(pte_t * pte, unsigned long arg)
-{
-	pte_val(*pte) |= _PAGE_NO_CACHE;
-}
-
-static void set_cached(pte_t * pte, unsigned long arg)
-{
-	pte_val(*pte) &= ~_PAGE_NO_CACHE;
-}
-
-static inline void iterate_pte(pmd_t * pmd, unsigned long address,
-			       unsigned long size, pte_iterator_t op,
-			       unsigned long arg)
-{
-	pte_t *pte;
-	unsigned long end;
-
-	if (pmd_none(*pmd))
-		return;
-	if (pmd_bad(*pmd)) {
-		pmd_ERROR(*pmd);
-		pmd_clear(pmd);
-		return;
-	}
-	pte = pte_offset(pmd, address);
-	address &= ~PMD_MASK;
-	end = address + size;
-	if (end > PMD_SIZE)
-		end = PMD_SIZE;
-	do {
-		op(pte, arg);
-		address += PAGE_SIZE;
-		pte++;
-	} while (address < end);
-}
-
-static inline void iterate_pmd(pgd_t * dir, unsigned long address,
-			       unsigned long size, pte_iterator_t op,
-			       unsigned long arg)
-{
-	pmd_t *pmd;
-	unsigned long end;
-
-	if (pgd_none(*dir))
-		return;
-	if (pgd_bad(*dir)) {
-		pgd_ERROR(*dir);
-		pgd_clear(dir);
-		return;
-	}
-	pmd = pmd_offset(dir, address);
-	address &= ~PGDIR_MASK;
-	end = address + size;
-	if (end > PGDIR_SIZE)
-		end = PGDIR_SIZE;
-	do {
-		iterate_pte(pmd, address, end - address, op, arg);
-		address = (address + PMD_SIZE) & PMD_MASK;
-		pmd++;
-	} while (address < end);
-}
-
-static void iterate_pages(unsigned long address, unsigned long size,
-			  pte_iterator_t op, unsigned long arg)
-{
-	pgd_t *dir;
-	unsigned long end = address + size;
-
-	dir = pgd_offset_k(address);
-	flush_cache_all();
-	do {
-		iterate_pmd(dir, address, end - address, op, arg);
-		address = (address + PGDIR_SIZE) & PGDIR_MASK;
-		dir++;
-	} while (address && (address < end));
-	flush_tlb_all();
-}
-
-void
-kernel_set_cachemode(unsigned long vaddr, unsigned long size, int what)
-{
-	switch (what) {
-	case IOMAP_FULL_CACHING:
-		iterate_pages(vaddr, size, set_cached, 0);
-		flush_tlb_range(&init_mm, vaddr, size);
-		break;
-	case IOMAP_NOCACHE_SER:
-		iterate_pages(vaddr, size, set_uncached, 0);
-		flush_tlb_range(&init_mm, vaddr, size);
-		break;
-	default:
-		printk(KERN_CRIT
-		       "kernel_set_cachemode mode %d not understood\n",
-		       what);
-		break;
-	}
-}