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kernel-fxtec-pro1x/arch/cris/mm/init.c
Nick Piggin 7835e98b2e [PATCH] remove set_page_count() outside mm/ 
set_page_count usage outside mm/ is limited to setting the refcount to 1.
Remove set_page_count from outside mm/, and replace those users with
init_page_count() and set_page_refcounted().

This allows more debug checking, and tighter control on how code is allowed
to play around with page->_count.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-22 07:54:02 -08:00

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/*
* linux/arch/cris/mm/init.c
*
* Copyright (C) 1995 Linus Torvalds
* Copyright (C) 2000,2001 Axis Communications AB
*
* Authors: Bjorn Wesen (bjornw@axis.com)
*
* $Log: init.c,v $
* Revision 1.11 2004/05/28 09:28:56 starvik
* Calculation of loops_per_usec moved because initalization order has changed
* in Linux 2.6.
*
* Revision 1.10 2004/05/14 07:58:05 starvik
* Merge of changes from 2.4
*
* Revision 1.9 2003/07/04 08:27:54 starvik
* Merge of Linux 2.5.74
*
* Revision 1.8 2003/04/09 05:20:48 starvik
* Merge of Linux 2.5.67
*
* Revision 1.7 2003/01/22 06:48:38 starvik
* Fixed warnings issued by GCC 3.2.1
*
* Revision 1.6 2002/12/11 14:44:48 starvik
* Extracted v10 (ETRAX 100LX) specific stuff to arch/cris/arch-v10/mm
*
* Revision 1.5 2002/11/18 07:37:37 starvik
* Added cache bug workaround (from Linux 2.4)
*
* Revision 1.4 2002/11/13 15:40:24 starvik
* Removed the page table cache stuff (as done in other archs)
*
* Revision 1.3 2002/11/05 06:45:13 starvik
* Merge of Linux 2.5.45
*
* Revision 1.2 2001/12/18 13:35:22 bjornw
* Applied the 2.4.13->2.4.16 CRIS patch to 2.5.1 (is a copy of 2.4.15).
*
* Revision 1.31 2001/11/13 16:22:00 bjornw
* Skip calculating totalram and sharedram in si_meminfo
*
* Revision 1.30 2001/11/12 19:02:10 pkj
* Fixed compiler warnings.
*
* Revision 1.29 2001/07/25 16:09:50 bjornw
* val->sharedram will stay 0
*
* Revision 1.28 2001/06/28 16:30:17 bjornw
* Oops. This needs to wait until 2.4.6 is merged
*
* Revision 1.27 2001/06/28 14:04:07 bjornw
* Fill in sharedram
*
* Revision 1.26 2001/06/18 06:36:02 hp
* Enable free_initmem of __init-type pages
*
* Revision 1.25 2001/06/13 00:02:23 bjornw
* Use a separate variable to store the current pgd to avoid races in schedule
*
* Revision 1.24 2001/05/15 00:52:20 hp
* Only map segment 0xa as seg if CONFIG_JULIETTE
*
* Revision 1.23 2001/04/04 14:35:40 bjornw
* * Removed get_pte_slow and friends (2.4.3 change)
* * Removed bad_pmd handling (2.4.3 change)
*
* Revision 1.22 2001/04/04 13:38:04 matsfg
* Moved ioremap to a separate function instead
*
* Revision 1.21 2001/03/27 09:28:33 bjornw
* ioremap used too early - lets try it in mem_init instead
*
* Revision 1.20 2001/03/23 07:39:21 starvik
* Corrected according to review remarks
*
* Revision 1.19 2001/03/15 14:25:17 bjornw
* More general shadow registers and ioremaped addresses for external I/O
*
* Revision 1.18 2001/02/23 12:46:44 bjornw
* * 0xc was not CSE1; 0x8 is, same as uncached flash, so we move the uncached
* flash during CRIS_LOW_MAP from 0xe to 0x8 so both the flash and the I/O
* is mapped straight over (for !CRIS_LOW_MAP the uncached flash is still 0xe)
*
* Revision 1.17 2001/02/22 15:05:21 bjornw
* Map 0x9 straight over during LOW_MAP to allow for memory mapped LEDs
*
* Revision 1.16 2001/02/22 15:02:35 bjornw
* Map 0xc straight over during LOW_MAP to allow for memory mapped I/O
*
* Revision 1.15 2001/01/10 21:12:10 bjornw
* loops_per_sec -> loops_per_jiffy
*
* Revision 1.14 2000/11/22 16:23:20 bjornw
* Initialize totalhigh counters to 0 to make /proc/meminfo look nice.
*
* Revision 1.13 2000/11/21 16:37:51 bjornw
* Temporarily disable initmem freeing
*
* Revision 1.12 2000/11/21 13:55:07 bjornw
* Use CONFIG_CRIS_LOW_MAP for the low VM map instead of explicit CPU type
*
* Revision 1.11 2000/10/06 12:38:22 bjornw
* Cast empty_bad_page correctly (should really be of * type from the start..
*
* Revision 1.10 2000/10/04 16:53:57 bjornw
* Fix memory-map due to LX features
*
* Revision 1.9 2000/09/13 15:47:49 bjornw
* Wrong count in reserved-pages loop
*
* Revision 1.8 2000/09/13 14:35:10 bjornw
* 2.4.0-test8 added a new arg to free_area_init_node
*
* Revision 1.7 2000/08/17 15:35:55 bjornw
* 2.4.0-test6 removed MAP_NR and inserted virt_to_page
*
*
*/
#include <linux/init.h>
#include <linux/bootmem.h>
#include <asm/tlb.h>
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
unsigned long empty_zero_page;
extern char _stext, _edata, _etext; /* From linkerscript */
extern char __init_begin, __init_end;
void
show_mem(void)
{
int i,free = 0,total = 0,cached = 0, reserved = 0, nonshared = 0;
int shared = 0;
printk("\nMem-info:\n");
show_free_areas();
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
i = max_mapnr;
while (i-- > 0) {
total++;
if (PageReserved(mem_map+i))
reserved++;
else if (PageSwapCache(mem_map+i))
cached++;
else if (!page_count(mem_map+i))
free++;
else if (page_count(mem_map+i) == 1)
nonshared++;
else
shared += page_count(mem_map+i) - 1;
}
printk("%d pages of RAM\n",total);
printk("%d free pages\n",free);
printk("%d reserved pages\n",reserved);
printk("%d pages nonshared\n",nonshared);
printk("%d pages shared\n",shared);
printk("%d pages swap cached\n",cached);
}
void __init
mem_init(void)
{
int codesize, reservedpages, datasize, initsize;
unsigned long tmp;
if(!mem_map)
BUG();
/* max/min_low_pfn was set by setup.c
* now we just copy it to some other necessary places...
*
* high_memory was also set in setup.c
*/
max_mapnr = num_physpages = max_low_pfn - min_low_pfn;
/* this will put all memory onto the freelists */
totalram_pages = free_all_bootmem();
reservedpages = 0;
for (tmp = 0; tmp < max_mapnr; tmp++) {
/*
* Only count reserved RAM pages
*/
if (PageReserved(mem_map + tmp))
reservedpages++;
}
codesize = (unsigned long) &_etext - (unsigned long) &_stext;
datasize = (unsigned long) &_edata - (unsigned long) &_etext;
initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
printk(KERN_INFO
"Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, "
"%dk init)\n" ,
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
max_mapnr << (PAGE_SHIFT-10),
codesize >> 10,
reservedpages << (PAGE_SHIFT-10),
datasize >> 10,
initsize >> 10
);
}
/* free the pages occupied by initialization code */
void
free_initmem(void)
{
unsigned long addr;
addr = (unsigned long)(&__init_begin);
for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
free_page(addr);
totalram_pages++;
}
printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n",
(unsigned long)((&__init_end - &__init_begin) >> 10));
}
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