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authorHirokazu Takata <takata@linux-m32r.org>2007-02-10 04:43:37 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-11 13:51:20 -0500
commit9b87ed790714bd3a8d492feb24f6c48f8bb59c3a (patch)
treef8915b927d4617200e7828c14a4335380d05c0be /arch/m32r/mm
parent9674dcf795a4c7384e4e42c8f38fcb87517b1a43 (diff)
[PATCH] m32r: fix do_page_fault and update_mmu_cache
Fix do_page_fault and update_mmu_cache. * Fix do_page_fault (vmalloc_fault:) to pass error_code correctly to update_mmu_cache by using a thread-fault code for all m32r chips. * Fix update_mmu_cache for OPSP chip - #ifdef CONFIG_CHIP_OPSP portion is a workaround of OPSP; Add a notfound-case operation to update_mmu_cache for OPSP like other m32r chip. - Fix pte_data that was not initialized if no entry found. Signed-off-by: Kazuhiro Inaoka <inaoka@linux-m32r.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/m32r/mm')
-rw-r--r--arch/m32r/mm/fault.c40
1 files changed, 19 insertions, 21 deletions
diff --git a/arch/m32r/mm/fault.c b/arch/m32r/mm/fault.c
index 9b9feb0f1610..fc7ccdf829e2 100644
--- a/arch/m32r/mm/fault.c
+++ b/arch/m32r/mm/fault.c
@@ -362,8 +362,10 @@ vmalloc_fault:
362 if (!pte_present(*pte_k)) 362 if (!pte_present(*pte_k))
363 goto no_context; 363 goto no_context;
364 364
365 addr = (address & PAGE_MASK) | (error_code & ACE_INSTRUCTION); 365 addr = (address & PAGE_MASK);
366 set_thread_fault_code(error_code);
366 update_mmu_cache(NULL, addr, *pte_k); 367 update_mmu_cache(NULL, addr, *pte_k);
368 set_thread_fault_code(0);
367 return; 369 return;
368 } 370 }
369} 371}
@@ -377,7 +379,7 @@ vmalloc_fault:
377void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr, 379void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr,
378 pte_t pte) 380 pte_t pte)
379{ 381{
380 unsigned long *entry1, *entry2; 382 volatile unsigned long *entry1, *entry2;
381 unsigned long pte_data, flags; 383 unsigned long pte_data, flags;
382 unsigned int *entry_dat; 384 unsigned int *entry_dat;
383 int inst = get_thread_fault_code() & ACE_INSTRUCTION; 385 int inst = get_thread_fault_code() & ACE_INSTRUCTION;
@@ -391,30 +393,26 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr,
391 393
392 vaddr = (vaddr & PAGE_MASK) | get_asid(); 394 vaddr = (vaddr & PAGE_MASK) | get_asid();
393 395
396 pte_data = pte_val(pte);
397
394#ifdef CONFIG_CHIP_OPSP 398#ifdef CONFIG_CHIP_OPSP
395 entry1 = (unsigned long *)ITLB_BASE; 399 entry1 = (unsigned long *)ITLB_BASE;
396 for(i = 0 ; i < NR_TLB_ENTRIES; i++) { 400 for (i = 0; i < NR_TLB_ENTRIES; i++) {
397 if(*entry1++ == vaddr) { 401 if (*entry1++ == vaddr) {
398 pte_data = pte_val(pte); 402 set_tlb_data(entry1, pte_data);
399 set_tlb_data(entry1, pte_data); 403 break;
400 break; 404 }
401 } 405 entry1++;
402 entry1++;
403 } 406 }
404 entry2 = (unsigned long *)DTLB_BASE; 407 entry2 = (unsigned long *)DTLB_BASE;
405 for(i = 0 ; i < NR_TLB_ENTRIES ; i++) { 408 for (i = 0; i < NR_TLB_ENTRIES; i++) {
406 if(*entry2++ == vaddr) { 409 if (*entry2++ == vaddr) {
407 pte_data = pte_val(pte); 410 set_tlb_data(entry2, pte_data);
408 set_tlb_data(entry2, pte_data); 411 break;
409 break; 412 }
410 } 413 entry2++;
411 entry2++;
412 } 414 }
413 local_irq_restore(flags);
414 return;
415#else 415#else
416 pte_data = pte_val(pte);
417
418 /* 416 /*
419 * Update TLB entries 417 * Update TLB entries
420 * entry1: ITLB entry address 418 * entry1: ITLB entry address
@@ -439,6 +437,7 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr,
439 "i" (MSVA_offset), "i" (MTOP_offset), "i" (MIDXI_offset) 437 "i" (MSVA_offset), "i" (MTOP_offset), "i" (MIDXI_offset)
440 : "r4", "memory" 438 : "r4", "memory"
441 ); 439 );
440#endif
442 441
443 if ((!inst && entry2 >= DTLB_END) || (inst && entry1 >= ITLB_END)) 442 if ((!inst && entry2 >= DTLB_END) || (inst && entry1 >= ITLB_END))
444 goto notfound; 443 goto notfound;
@@ -482,7 +481,6 @@ notfound:
482 set_tlb_data(entry1, pte_data); 481 set_tlb_data(entry1, pte_data);
483 482
484 goto found; 483 goto found;
485#endif
486} 484}
487 485
488/*======================================================================* 486/*======================================================================*