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[PARISC] Further work for multiple page sizes

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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>
This commit is contained in:
Helge Deller
2006-04-20 20:40:23 +00:00
committed by Kyle McMartin
parent d668da80d6
commit 2fd8303816
11 changed files with 198 additions and 102 deletions
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28
arch/parisc/mm/init.c
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@ -6,6 +6,7 @@
* changed by Philipp Rumpf
* Copyright 1999 Philipp Rumpf (prumpf@tux.org)
* Copyright 2004 Randolph Chung (tausq@debian.org)
* Copyright 2006 Helge Deller (deller@gmx.de)
*
*/
@ -371,8 +372,8 @@ static void __init setup_bootmem(void)
void free_initmem(void)
{
unsigned long addr;
unsigned long addr, init_begin, init_end;
printk(KERN_INFO "Freeing unused kernel memory: ");
#ifdef CONFIG_DEBUG_KERNEL
@ -395,8 +396,11 @@ void free_initmem(void)
local_irq_enable();
#endif
addr = (unsigned long)(&__init_begin);
for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
/* align __init_begin and __init_end to page size,
ignoring linker script where we might have tried to save RAM */
init_begin = PAGE_ALIGN((unsigned long)(&__init_begin));
init_end = PAGE_ALIGN((unsigned long)(&__init_end));
for (addr = init_begin; addr < init_end; addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
free_page(addr);
@ -407,7 +411,7 @@ void free_initmem(void)
/* set up a new led state on systems shipped LED State panel */
pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10);
printk("%luk freed\n", (init_end - init_begin) >> 10);
}
@ -639,11 +643,13 @@ static void __init map_pages(unsigned long start_vaddr, unsigned long start_padd
* Map the fault vector writable so we can
* write the HPMC checksum.
*/
#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
if (address >= ro_start && address < ro_end
&& address != fv_addr
&& address != gw_addr)
pte = __mk_pte(address, PAGE_KERNEL_RO);
else
#endif
pte = __mk_pte(address, pgprot);
if (address >= end_paddr)
@ -874,8 +880,7 @@ unsigned long alloc_sid(void)
flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */
spin_lock(&sid_lock);
}
if (free_space_ids == 0)
BUG();
BUG_ON(free_space_ids == 0);
}
free_space_ids--;
@ -899,8 +904,7 @@ void free_sid(unsigned long spaceid)
spin_lock(&sid_lock);
if (*dirty_space_offset & (1L << index))
BUG(); /* attempt to free space id twice */
BUG_ON(*dirty_space_offset & (1L << index)); /* attempt to free space id twice */
*dirty_space_offset |= (1L << index);
dirty_space_ids++;
@ -975,7 +979,7 @@ static void recycle_sids(void)
static unsigned long recycle_ndirty;
static unsigned long recycle_dirty_array[SID_ARRAY_SIZE];
static unsigned int recycle_inuse = 0;
static unsigned int recycle_inuse;
void flush_tlb_all(void)
{
@ -984,9 +988,7 @@ void flush_tlb_all(void)
do_recycle = 0;
spin_lock(&sid_lock);
if (dirty_space_ids > RECYCLE_THRESHOLD) {
if (recycle_inuse) {
BUG(); /* FIXME: Use a semaphore/wait queue here */
}
BUG_ON(recycle_inuse); /* FIXME: Use a semaphore/wait queue here */
get_dirty_sids(&recycle_ndirty,recycle_dirty_array);
recycle_inuse++;
do_recycle++;