2005-04-17 06:20:36 +08:00
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/*
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* linux/arch/m32r/mm/init.c
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*
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* Copyright (c) 2001, 2002 Hitoshi Yamamoto
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*
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* Some code taken from sh version.
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* Copyright (C) 1999 Niibe Yutaka
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* Based on linux/arch/i386/mm/init.c:
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* Copyright (C) 1995 Linus Torvalds
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/bootmem.h>
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#include <linux/swap.h>
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#include <linux/highmem.h>
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#include <linux/bitops.h>
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#include <linux/nodemask.h>
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2006-03-27 17:16:04 +08:00
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#include <linux/pfn.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 16:04:11 +08:00
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#include <linux/gfp.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/types.h>
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/pgalloc.h>
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#include <asm/mmu_context.h>
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#include <asm/setup.h>
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#include <asm/tlb.h>
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2013-04-30 06:06:40 +08:00
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#include <asm/sections.h>
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2005-04-17 06:20:36 +08:00
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pgd_t swapper_pg_dir[1024];
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/*
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* Cache of MMU context last used.
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*/
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#ifndef CONFIG_SMP
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unsigned long mmu_context_cache_dat;
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#else
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unsigned long mmu_context_cache_dat[NR_CPUS];
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#endif
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static unsigned long hole_pages;
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/*
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* function prototype
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*/
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void __init paging_init(void);
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void __init mem_init(void);
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void free_initmem(void);
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#ifdef CONFIG_BLK_DEV_INITRD
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void free_initrd_mem(unsigned long, unsigned long);
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#endif
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/* It'd be good if these lines were in the standard header file. */
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2008-07-24 12:28:09 +08:00
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#define START_PFN(nid) (NODE_DATA(nid)->bdata->node_min_pfn)
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2005-04-17 06:20:36 +08:00
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#define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
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#ifndef CONFIG_DISCONTIGMEM
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unsigned long __init zone_sizes_init(void)
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{
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2006-09-26 14:31:10 +08:00
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unsigned long zones_size[MAX_NR_ZONES] = {0, };
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2005-04-17 06:20:36 +08:00
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unsigned long max_dma;
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unsigned long low;
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unsigned long start_pfn;
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#ifdef CONFIG_MMU
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start_pfn = START_PFN(0);
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max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
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low = MAX_LOW_PFN(0);
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if (low < max_dma){
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zones_size[ZONE_DMA] = low - start_pfn;
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zones_size[ZONE_NORMAL] = 0;
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} else {
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zones_size[ZONE_DMA] = low - start_pfn;
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zones_size[ZONE_NORMAL] = low - max_dma;
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}
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#else
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zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;
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zones_size[ZONE_NORMAL] = __MEMORY_SIZE >> PAGE_SHIFT;
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start_pfn = __MEMORY_START >> PAGE_SHIFT;
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#endif /* CONFIG_MMU */
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2008-07-24 12:27:20 +08:00
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free_area_init_node(0, zones_size, start_pfn, 0);
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2005-04-17 06:20:36 +08:00
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return 0;
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}
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#else /* CONFIG_DISCONTIGMEM */
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extern unsigned long zone_sizes_init(void);
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#endif /* CONFIG_DISCONTIGMEM */
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/*======================================================================*
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* paging_init() : sets up the page tables
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*======================================================================*/
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void __init paging_init(void)
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{
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#ifdef CONFIG_MMU
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int i;
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pgd_t *pg_dir;
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/* We don't need kernel mapping as hardware support that. */
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pg_dir = swapper_pg_dir;
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for (i = 0 ; i < USER_PTRS_PER_PGD * 2 ; i++)
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pgd_val(pg_dir[i]) = 0;
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#endif /* CONFIG_MMU */
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hole_pages = zone_sizes_init();
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}
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int __init reservedpages_count(void)
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{
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int reservedpages, nid, i;
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reservedpages = 0;
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2005-10-30 09:16:52 +08:00
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for_each_online_node(nid) {
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unsigned long flags;
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pgdat_resize_lock(NODE_DATA(nid), &flags);
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2005-04-17 06:20:36 +08:00
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for (i = 0 ; i < MAX_LOW_PFN(nid) - START_PFN(nid) ; i++)
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[PATCH] remove non-DISCONTIG use of pgdat->node_mem_map
This patch effectively eliminates direct use of pgdat->node_mem_map outside
of the DISCONTIG code. On a flat memory system, these fields aren't
currently used, neither are they on a sparsemem system.
There was also a node_mem_map(nid) macro on many architectures. Its use
along with the use of ->node_mem_map itself was not consistent. It has
been removed in favor of two new, more explicit, arch-independent macros:
pgdat_page_nr(pgdat, pagenr)
nid_page_nr(nid, pagenr)
I called them "pgdat" and "nid" because we overload the term "node" to mean
"NUMA node", "DISCONTIG node" or "pg_data_t" in very confusing ways. I
believe the newer names are much clearer.
These macros can be overridden in the sparsemem case with a theoretically
slower operation using node_start_pfn and pfn_to_page(), instead. We could
make this the only behavior if people want, but I don't want to change too
much at once. One thing at a time.
This patch removes more code than it adds.
Compile tested on alpha, alpha discontig, arm, arm-discontig, i386, i386
generic, NUMAQ, Summit, ppc64, ppc64 discontig, and x86_64. Full list
here: http://sr71.net/patches/2.6.12/2.6.12-rc1-mhp2/configs/
Boot tested on NUMAQ, x86 SMP and ppc64 power4/5 LPARs.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Martin J. Bligh <mbligh@aracnet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23 15:07:37 +08:00
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if (PageReserved(nid_page_nr(nid, i)))
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2005-04-17 06:20:36 +08:00
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reservedpages++;
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2005-10-30 09:16:52 +08:00
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pgdat_resize_unlock(NODE_DATA(nid), &flags);
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}
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2005-04-17 06:20:36 +08:00
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return reservedpages;
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}
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/*======================================================================*
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* mem_init() :
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* orig : arch/sh/mm/init.c
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*======================================================================*/
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void __init mem_init(void)
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{
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int codesize, reservedpages, datasize, initsize;
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int nid;
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#ifndef CONFIG_MMU
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extern unsigned long memory_end;
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#endif
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num_physpages = 0;
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for_each_online_node(nid)
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num_physpages += MAX_LOW_PFN(nid) - START_PFN(nid) + 1;
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num_physpages -= hole_pages;
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#ifndef CONFIG_DISCONTIGMEM
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max_mapnr = num_physpages;
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#endif /* CONFIG_DISCONTIGMEM */
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#ifdef CONFIG_MMU
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high_memory = (void *)__va(PFN_PHYS(MAX_LOW_PFN(0)));
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#else
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high_memory = (void *)(memory_end & PAGE_MASK);
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#endif /* CONFIG_MMU */
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/* clear the zero-page */
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memset(empty_zero_page, 0, PAGE_SIZE);
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/* this will put all low memory onto the freelists */
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for_each_online_node(nid)
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totalram_pages += free_all_bootmem_node(NODE_DATA(nid));
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reservedpages = reservedpages_count() - hole_pages;
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codesize = (unsigned long) &_etext - (unsigned long)&_text;
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datasize = (unsigned long) &_edata - (unsigned long)&_etext;
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initsize = (unsigned long) &__init_end - (unsigned long)&__init_begin;
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printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
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"%dk reserved, %dk data, %dk init)\n",
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2009-09-22 08:02:36 +08:00
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nr_free_pages() << (PAGE_SHIFT-10),
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2005-04-17 06:20:36 +08:00
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num_physpages << (PAGE_SHIFT-10),
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codesize >> 10,
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reservedpages << (PAGE_SHIFT-10),
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datasize >> 10,
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initsize >> 10);
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}
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/*======================================================================*
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* free_initmem() :
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* orig : arch/sh/mm/init.c
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*======================================================================*/
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void free_initmem(void)
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{
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2013-04-30 06:06:40 +08:00
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free_initmem_default(0);
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2005-04-17 06:20:36 +08:00
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}
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#ifdef CONFIG_BLK_DEV_INITRD
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/*======================================================================*
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* free_initrd_mem() :
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* orig : arch/sh/mm/init.c
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*======================================================================*/
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void 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>
2013-07-04 06:02:48 +08:00
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free_reserved_area((void *)start, (void *)end, 0, "initrd");
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2005-04-17 06:20:36 +08:00
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}
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#endif
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