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authorHelge Deller <deller@parisc-linux.org>2006-04-20 16:40:23 -0400
committerKyle McMartin <kyle@hera.kernel.org>2006-04-21 18:20:34 -0400
commit2fd83038160531245099c3c5b3511fa4b80765eb (patch)
tree6145a9e78723c76ceac722eb60267c0116983c12 /arch/parisc/mm/init.c
parentd668da80d613def981c573354e1853e38bd0698d (diff)
[PARISC] Further work for multiple page sizes
More work towards supporing multiple page sizes on 64-bit. Convert some assumptions that 64bit uses 3 level page tables into testing PT_NLEVELS. Also some BUG() to BUG_ON() conversions and some cleanups to assembler. Signed-off-by: Helge Deller <deller@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'arch/parisc/mm/init.c')
-rw-r--r--arch/parisc/mm/init.c28
1 files changed, 15 insertions, 13 deletions
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 3796be67cd53..631712562656 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -6,6 +6,7 @@
6 * changed by Philipp Rumpf 6 * changed by Philipp Rumpf
7 * Copyright 1999 Philipp Rumpf (prumpf@tux.org) 7 * Copyright 1999 Philipp Rumpf (prumpf@tux.org)
8 * Copyright 2004 Randolph Chung (tausq@debian.org) 8 * Copyright 2004 Randolph Chung (tausq@debian.org)
9 * Copyright 2006 Helge Deller (deller@gmx.de)
9 * 10 *
10 */ 11 */
11 12
@@ -371,8 +372,8 @@ static void __init setup_bootmem(void)
371 372
372void free_initmem(void) 373void free_initmem(void)
373{ 374{
374 unsigned long addr; 375 unsigned long addr, init_begin, init_end;
375 376
376 printk(KERN_INFO "Freeing unused kernel memory: "); 377 printk(KERN_INFO "Freeing unused kernel memory: ");
377 378
378#ifdef CONFIG_DEBUG_KERNEL 379#ifdef CONFIG_DEBUG_KERNEL
@@ -395,8 +396,11 @@ void free_initmem(void)
395 local_irq_enable(); 396 local_irq_enable();
396#endif 397#endif
397 398
398 addr = (unsigned long)(&__init_begin); 399 /* align __init_begin and __init_end to page size,
399 for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { 400 ignoring linker script where we might have tried to save RAM */
401 init_begin = PAGE_ALIGN((unsigned long)(&__init_begin));
402 init_end = PAGE_ALIGN((unsigned long)(&__init_end));
403 for (addr = init_begin; addr < init_end; addr += PAGE_SIZE) {
400 ClearPageReserved(virt_to_page(addr)); 404 ClearPageReserved(virt_to_page(addr));
401 init_page_count(virt_to_page(addr)); 405 init_page_count(virt_to_page(addr));
402 free_page(addr); 406 free_page(addr);
@@ -407,7 +411,7 @@ void free_initmem(void)
407 /* set up a new led state on systems shipped LED State panel */ 411 /* set up a new led state on systems shipped LED State panel */
408 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE); 412 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
409 413
410 printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10); 414 printk("%luk freed\n", (init_end - init_begin) >> 10);
411} 415}
412 416
413 417
@@ -639,11 +643,13 @@ static void __init map_pages(unsigned long start_vaddr, unsigned long start_padd
639 * Map the fault vector writable so we can 643 * Map the fault vector writable so we can
640 * write the HPMC checksum. 644 * write the HPMC checksum.
641 */ 645 */
646#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
642 if (address >= ro_start && address < ro_end 647 if (address >= ro_start && address < ro_end
643 && address != fv_addr 648 && address != fv_addr
644 && address != gw_addr) 649 && address != gw_addr)
645 pte = __mk_pte(address, PAGE_KERNEL_RO); 650 pte = __mk_pte(address, PAGE_KERNEL_RO);
646 else 651 else
652#endif
647 pte = __mk_pte(address, pgprot); 653 pte = __mk_pte(address, pgprot);
648 654
649 if (address >= end_paddr) 655 if (address >= end_paddr)
@@ -874,8 +880,7 @@ unsigned long alloc_sid(void)
874 flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */ 880 flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */
875 spin_lock(&sid_lock); 881 spin_lock(&sid_lock);
876 } 882 }
877 if (free_space_ids == 0) 883 BUG_ON(free_space_ids == 0);
878 BUG();
879 } 884 }
880 885
881 free_space_ids--; 886 free_space_ids--;
@@ -899,8 +904,7 @@ void free_sid(unsigned long spaceid)
899 904
900 spin_lock(&sid_lock); 905 spin_lock(&sid_lock);
901 906
902 if (*dirty_space_offset & (1L << index)) 907 BUG_ON(*dirty_space_offset & (1L << index)); /* attempt to free space id twice */
903 BUG(); /* attempt to free space id twice */
904 908
905 *dirty_space_offset |= (1L << index); 909 *dirty_space_offset |= (1L << index);
906 dirty_space_ids++; 910 dirty_space_ids++;
@@ -975,7 +979,7 @@ static void recycle_sids(void)
975 979
976static unsigned long recycle_ndirty; 980static unsigned long recycle_ndirty;
977static unsigned long recycle_dirty_array[SID_ARRAY_SIZE]; 981static unsigned long recycle_dirty_array[SID_ARRAY_SIZE];
978static unsigned int recycle_inuse = 0; 982static unsigned int recycle_inuse;
979 983
980void flush_tlb_all(void) 984void flush_tlb_all(void)
981{ 985{
@@ -984,9 +988,7 @@ void flush_tlb_all(void)
984 do_recycle = 0; 988 do_recycle = 0;
985 spin_lock(&sid_lock); 989 spin_lock(&sid_lock);
986 if (dirty_space_ids > RECYCLE_THRESHOLD) { 990 if (dirty_space_ids > RECYCLE_THRESHOLD) {
987 if (recycle_inuse) { 991 BUG_ON(recycle_inuse); /* FIXME: Use a semaphore/wait queue here */
988 BUG(); /* FIXME: Use a semaphore/wait queue here */
989 }
990 get_dirty_sids(&recycle_ndirty,recycle_dirty_array); 992 get_dirty_sids(&recycle_ndirty,recycle_dirty_array);
991 recycle_inuse++; 993 recycle_inuse++;
992 do_recycle++; 994 do_recycle++;