kernel-ark/arch/sh/mm/numa.c
Johannes Weiner b61bfa3c46 mm: move bootmem descriptors definition to a single place
There are a lot of places that define either a single bootmem descriptor or an
array of them.  Use only one central array with MAX_NUMNODES items instead.

Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Kyle McMartin <kyle@parisc-linux.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-24 10:47:14 -07:00

92 lines
2.8 KiB
C

/*
* arch/sh/mm/numa.c - Multiple node support for SH machines
*
* Copyright (C) 2007 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/module.h>
#include <linux/bootmem.h>
#include <linux/mm.h>
#include <linux/numa.h>
#include <linux/pfn.h>
#include <asm/sections.h>
struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
EXPORT_SYMBOL_GPL(node_data);
/*
* On SH machines the conventional approach is to stash system RAM
* in node 0, and other memory blocks in to node 1 and up, ordered by
* latency. Each node's pgdat is node-local at the beginning of the node,
* immediately followed by the node mem map.
*/
void __init setup_memory(void)
{
unsigned long free_pfn = PFN_UP(__pa(_end));
/*
* Node 0 sets up its pgdat at the first available pfn,
* and bumps it up before setting up the bootmem allocator.
*/
NODE_DATA(0) = pfn_to_kaddr(free_pfn);
memset(NODE_DATA(0), 0, sizeof(struct pglist_data));
free_pfn += PFN_UP(sizeof(struct pglist_data));
NODE_DATA(0)->bdata = &bootmem_node_data[0];
/* Set up node 0 */
setup_bootmem_allocator(free_pfn);
/* Give the platforms a chance to hook up their nodes */
plat_mem_setup();
}
void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
{
unsigned long bootmap_pages, bootmap_start, bootmap_size;
unsigned long start_pfn, free_pfn, end_pfn;
/* Don't allow bogus node assignment */
BUG_ON(nid > MAX_NUMNODES || nid == 0);
/*
* The free pfn starts at the beginning of the range, and is
* advanced as necessary for pgdat and node map allocations.
*/
free_pfn = start_pfn = start >> PAGE_SHIFT;
end_pfn = end >> PAGE_SHIFT;
__add_active_range(nid, start_pfn, end_pfn);
/* Node-local pgdat */
NODE_DATA(nid) = pfn_to_kaddr(free_pfn);
free_pfn += PFN_UP(sizeof(struct pglist_data));
memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
NODE_DATA(nid)->node_start_pfn = start_pfn;
NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
/* Node-local bootmap */
bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
bootmap_start = (unsigned long)pfn_to_kaddr(free_pfn);
bootmap_size = init_bootmem_node(NODE_DATA(nid), free_pfn, start_pfn,
end_pfn);
free_bootmem_with_active_regions(nid, end_pfn);
/* Reserve the pgdat and bootmap space with the bootmem allocator */
reserve_bootmem_node(NODE_DATA(nid), start_pfn << PAGE_SHIFT,
sizeof(struct pglist_data), BOOTMEM_DEFAULT);
reserve_bootmem_node(NODE_DATA(nid), free_pfn << PAGE_SHIFT,
bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
/* It's up */
node_set_online(nid);
/* Kick sparsemem */
sparse_memory_present_with_active_regions(nid);
}