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-rw-r--r--arch/powerpc/mm/pgtable_32.c118
1 files changed, 0 insertions, 118 deletions
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index f6ae1a57d652..62680b0f7204 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -303,48 +303,6 @@ void __init mapin_ram(void)
303/* is x a power of 4? */ 303/* is x a power of 4? */
304#define is_power_of_4(x) is_power_of_2(x) && (ffs(x) & 1) 304#define is_power_of_4(x) is_power_of_2(x) && (ffs(x) & 1)
305 305
306/*
307 * Set up a mapping for a block of I/O.
308 * virt, phys, size must all be page-aligned.
309 * This should only be called before ioremap is called.
310 */
311void __init io_block_mapping(unsigned long virt, phys_addr_t phys,
312 unsigned int size, int flags)
313{
314 int i;
315
316 if (virt > KERNELBASE && virt < ioremap_bot)
317 ioremap_bot = ioremap_base = virt;
318
319#ifdef HAVE_BATS
320 /*
321 * Use a BAT for this if possible...
322 */
323 if (io_bat_index < 2 && is_power_of_2(size)
324 && (virt & (size - 1)) == 0 && (phys & (size - 1)) == 0) {
325 setbat(io_bat_index, virt, phys, size, flags);
326 ++io_bat_index;
327 return;
328 }
329#endif /* HAVE_BATS */
330
331#ifdef HAVE_TLBCAM
332 /*
333 * Use a CAM for this if possible...
334 */
335 if (tlbcam_index < num_tlbcam_entries && is_power_of_4(size)
336 && (virt & (size - 1)) == 0 && (phys & (size - 1)) == 0) {
337 settlbcam(tlbcam_index, virt, phys, size, flags, 0);
338 ++tlbcam_index;
339 return;
340 }
341#endif /* HAVE_TLBCAM */
342
343 /* No BATs available, put it in the page tables. */
344 for (i = 0; i < size; i += PAGE_SIZE)
345 map_page(virt + i, phys + i, flags);
346}
347
348/* Scan the real Linux page tables and return a PTE pointer for 306/* Scan the real Linux page tables and return a PTE pointer for
349 * a virtual address in a context. 307 * a virtual address in a context.
350 * Returns true (1) if PTE was found, zero otherwise. The pointer to 308 * Returns true (1) if PTE was found, zero otherwise. The pointer to
@@ -379,82 +337,6 @@ get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep, pmd_t **pmdp)
379 return(retval); 337 return(retval);
380} 338}
381 339
382/* Find physical address for this virtual address. Normally used by
383 * I/O functions, but anyone can call it.
384 */
385unsigned long iopa(unsigned long addr)
386{
387 unsigned long pa;
388
389 /* I don't know why this won't work on PMacs or CHRP. It
390 * appears there is some bug, or there is some implicit
391 * mapping done not properly represented by BATs or in page
392 * tables.......I am actively working on resolving this, but
393 * can't hold up other stuff. -- Dan
394 */
395 pte_t *pte;
396 struct mm_struct *mm;
397
398 /* Check the BATs */
399 pa = v_mapped_by_bats(addr);
400 if (pa)
401 return pa;
402
403 /* Allow mapping of user addresses (within the thread)
404 * for DMA if necessary.
405 */
406 if (addr < TASK_SIZE)
407 mm = current->mm;
408 else
409 mm = &init_mm;
410
411 pa = 0;
412 if (get_pteptr(mm, addr, &pte, NULL)) {
413 pa = (pte_val(*pte) & PAGE_MASK) | (addr & ~PAGE_MASK);
414 pte_unmap(pte);
415 }
416
417 return(pa);
418}
419
420/* This is will find the virtual address for a physical one....
421 * Swiped from APUS, could be dangerous :-).
422 * This is only a placeholder until I really find a way to make this
423 * work. -- Dan
424 */
425unsigned long
426mm_ptov (unsigned long paddr)
427{
428 unsigned long ret;
429#if 0
430 if (paddr < 16*1024*1024)
431 ret = ZTWO_VADDR(paddr);
432 else {
433 int i;
434
435 for (i = 0; i < kmap_chunk_count;){
436 unsigned long phys = kmap_chunks[i++];
437 unsigned long size = kmap_chunks[i++];
438 unsigned long virt = kmap_chunks[i++];
439 if (paddr >= phys
440 && paddr < (phys + size)){
441 ret = virt + paddr - phys;
442 goto exit;
443 }
444 }
445
446 ret = (unsigned long) __va(paddr);
447 }
448exit:
449#ifdef DEBUGPV
450 printk ("PTOV(%lx)=%lx\n", paddr, ret);
451#endif
452#else
453 ret = (unsigned long)paddr + KERNELBASE;
454#endif
455 return ret;
456}
457
458#ifdef CONFIG_DEBUG_PAGEALLOC 340#ifdef CONFIG_DEBUG_PAGEALLOC
459 341
460static int __change_page_attr(struct page *page, pgprot_t prot) 342static int __change_page_attr(struct page *page, pgprot_t prot)