2005-04-16 16:20:36 -06:00
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/* init.c: memory initialisation for FRV
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*
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* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Derived from:
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* - linux/arch/m68knommu/mm/init.c
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* - Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, Kenneth Albanowski <kjahds@kjahds.com>,
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* - Copyright (C) 2000 Lineo, Inc. (www.lineo.com)
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* - linux/arch/m68k/mm/init.c
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* - Copyright (C) 1995 Hamish Macdonald
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*/
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/pagemap.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 02:04:11 -06:00
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#include <linux/gfp.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/swap.h>
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#include <linux/mm.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/bootmem.h>
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#include <linux/highmem.h>
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2008-05-23 14:05:00 -06:00
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#include <linux/module.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/setup.h>
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#include <asm/segment.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/mmu_context.h>
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#include <asm/virtconvert.h>
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#include <asm/sections.h>
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#include <asm/tlb.h>
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#undef DEBUG
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/*
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* BAD_PAGE is the page that is used for page faults when linux
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* is out-of-memory. Older versions of linux just did a
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* do_exit(), but using this instead means there is less risk
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* for a process dying in kernel mode, possibly leaving a inode
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* unused etc..
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*
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* BAD_PAGETABLE is the accompanying page-table: it is initialized
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* to point to BAD_PAGE entries.
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*
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* ZERO_PAGE is a special page that is used for zero-initialized
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* data and COW.
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*/
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static unsigned long empty_bad_page_table;
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static unsigned long empty_bad_page;
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2008-05-23 14:05:00 -06:00
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2005-04-16 16:20:36 -06:00
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unsigned long empty_zero_page;
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2008-05-23 14:05:00 -06:00
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EXPORT_SYMBOL(empty_zero_page);
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2005-04-16 16:20:36 -06:00
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/*****************************************************************************/
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/*
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* paging_init() continues the virtual memory environment setup which
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* was begun by the code in arch/head.S.
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* The parameters are pointers to where to stick the starting and ending
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* addresses of available kernel virtual memory.
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*/
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void __init paging_init(void)
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{
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2006-09-26 00:31:10 -06:00
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unsigned long zones_size[MAX_NR_ZONES] = {0, };
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2005-04-16 16:20:36 -06:00
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/* allocate some pages for kernel housekeeping tasks */
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empty_bad_page_table = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
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empty_bad_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
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empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
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memset((void *) empty_zero_page, 0, PAGE_SIZE);
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2005-11-28 14:43:51 -07:00
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#ifdef CONFIG_HIGHMEM
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2005-04-16 16:20:36 -06:00
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if (num_physpages - num_mappedpages) {
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pgd_t *pge;
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pud_t *pue;
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pmd_t *pme;
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pkmap_page_table = alloc_bootmem_pages(PAGE_SIZE);
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pge = swapper_pg_dir + pgd_index_k(PKMAP_BASE);
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pue = pud_offset(pge, PKMAP_BASE);
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pme = pmd_offset(pue, PKMAP_BASE);
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__set_pmd(pme, virt_to_phys(pkmap_page_table) | _PAGE_TABLE);
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}
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#endif
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/* distribute the allocatable pages across the various zones and pass them to the allocator
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*/
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2007-02-28 21:11:58 -07:00
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zones_size[ZONE_NORMAL] = max_low_pfn - min_low_pfn;
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2005-04-16 16:20:36 -06:00
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#ifdef CONFIG_HIGHMEM
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zones_size[ZONE_HIGHMEM] = num_physpages - num_mappedpages;
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#endif
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free_area_init(zones_size);
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#ifdef CONFIG_MMU
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/* initialise init's MMU context */
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init_new_context(&init_task, &init_mm);
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#endif
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} /* end paging_init() */
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/*****************************************************************************/
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/*
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*
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*/
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void __init mem_init(void)
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{
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unsigned long npages = (memory_end - memory_start) >> PAGE_SHIFT;
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unsigned long tmp;
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#ifdef CONFIG_MMU
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unsigned long loop, pfn;
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int datapages = 0;
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#endif
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int codek = 0, datak = 0;
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2013-04-29 16:06:37 -06:00
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/* this will put all low memory onto the freelists */
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2005-04-16 16:20:36 -06:00
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totalram_pages = free_all_bootmem();
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#ifdef CONFIG_MMU
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for (loop = 0 ; loop < npages ; loop++)
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if (PageReserved(&mem_map[loop]))
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datapages++;
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#ifdef CONFIG_HIGHMEM
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2013-04-29 16:07:04 -06:00
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for (pfn = num_physpages - 1; pfn >= num_mappedpages; pfn--)
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free_highmem_page(&mem_map[pfn]);
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2005-04-16 16:20:36 -06:00
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#endif
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codek = ((unsigned long) &_etext - (unsigned long) &_stext) >> 10;
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datak = datapages << (PAGE_SHIFT - 10);
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#else
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codek = (_etext - _stext) >> 10;
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2012-12-17 16:59:26 -07:00
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datak = 0; //(__bss_stop - _sdata) >> 10;
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2005-04-16 16:20:36 -06:00
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#endif
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tmp = nr_free_pages() << PAGE_SHIFT;
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printk("Memory available: %luKiB/%luKiB RAM, %luKiB/%luKiB ROM (%dKiB kernel code, %dKiB data)\n",
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tmp >> 10,
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npages << (PAGE_SHIFT - 10),
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(rom_length > 0) ? ((rom_length >> 10) - codek) : 0,
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rom_length >> 10,
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codek,
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datak
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);
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} /* end mem_init() */
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/*****************************************************************************/
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/*
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* free the memory that was only required for initialisation
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*/
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2007-11-06 14:54:44 -07:00
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void free_initmem(void)
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2005-04-16 16:20:36 -06:00
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{
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#if defined(CONFIG_RAMKERNEL) && !defined(CONFIG_PROTECT_KERNEL)
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2013-04-29 16:06:37 -06:00
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free_initmem_default(0);
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2005-04-16 16:20:36 -06:00
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#endif
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} /* end free_initmem() */
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/*****************************************************************************/
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/*
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* free the initial ramdisk memory
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*/
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#ifdef CONFIG_BLK_DEV_INITRD
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void __init free_initrd_mem(unsigned long start, unsigned long end)
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{
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mm: change signature of free_reserved_area() to fix building warnings
Change signature of free_reserved_area() according to Russell King's
suggestion to fix following build warnings:
arch/arm/mm/init.c: In function 'mem_init':
arch/arm/mm/init.c:603:2: warning: passing argument 1 of 'free_reserved_area' makes integer from pointer without a cast [enabled by default]
free_reserved_area(__va(PHYS_PFN_OFFSET), swapper_pg_dir, 0, NULL);
^
In file included from include/linux/mman.h:4:0,
from arch/arm/mm/init.c:15:
include/linux/mm.h:1301:22: note: expected 'long unsigned int' but argument is of type 'void *'
extern unsigned long free_reserved_area(unsigned long start, unsigned long end,
mm/page_alloc.c: In function 'free_reserved_area':
>> mm/page_alloc.c:5134:3: warning: passing argument 1 of 'virt_to_phys' makes pointer from integer without a cast [enabled by default]
In file included from arch/mips/include/asm/page.h:49:0,
from include/linux/mmzone.h:20,
from include/linux/gfp.h:4,
from include/linux/mm.h:8,
from mm/page_alloc.c:18:
arch/mips/include/asm/io.h:119:29: note: expected 'const volatile void *' but argument is of type 'long unsigned int'
mm/page_alloc.c: In function 'free_area_init_nodes':
mm/page_alloc.c:5030:34: warning: array subscript is below array bounds [-Warray-bounds]
Also address some minor code review comments.
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: <sworddragon2@aol.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Jianguo Wu <wujianguo@huawei.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michel Lespinasse <walken@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:02:48 -06:00
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free_reserved_area((void *)start, (void *)end, 0, "initrd");
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2005-04-16 16:20:36 -06:00
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} /* end free_initrd_mem() */
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#endif
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