diff options
author | Helge Deller <deller@parisc-linux.org> | 2006-04-20 16:40:23 -0400 |
---|---|---|
committer | Kyle McMartin <kyle@hera.kernel.org> | 2006-04-21 18:20:34 -0400 |
commit | 2fd83038160531245099c3c5b3511fa4b80765eb (patch) | |
tree | 6145a9e78723c76ceac722eb60267c0116983c12 /arch/parisc/mm/init.c | |
parent | d668da80d613def981c573354e1853e38bd0698d (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.c | 28 |
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 | ||
372 | void free_initmem(void) | 373 | void 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 | ||
976 | static unsigned long recycle_ndirty; | 980 | static unsigned long recycle_ndirty; |
977 | static unsigned long recycle_dirty_array[SID_ARRAY_SIZE]; | 981 | static unsigned long recycle_dirty_array[SID_ARRAY_SIZE]; |
978 | static unsigned int recycle_inuse = 0; | 982 | static unsigned int recycle_inuse; |
979 | 983 | ||
980 | void flush_tlb_all(void) | 984 | void 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++; |