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/*
* 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/memblock.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_bootmem_node(int nid, unsigned long start, unsigned long end)
{
unsigned long start_pfn, end_pfn;
/* Don't allow bogus node assignment */
BUG_ON(nid >= MAX_NUMNODES || nid <= 0);
start_pfn = PFN_DOWN(start);
end_pfn = PFN_DOWN(end);
pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
PAGE_KERNEL);
memblock_add(start, end - start);
__add_active_range(nid, start_pfn, end_pfn);
/* Node-local pgdat */
NODE_DATA(nid) = memblock_alloc_node(sizeof(struct pglist_data),
SMP_CACHE_BYTES, nid);
if (!NODE_DATA(nid))
panic("%s: Failed to allocate %zu bytes align=0x%x nid=%d\n",
__func__, sizeof(struct pglist_data), SMP_CACHE_BYTES,
nid);
NODE_DATA(nid)->node_start_pfn = start_pfn;
NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
/* It's up */
node_set_online(nid);
/* Kick sparsemem */
sparse_memory_present_with_active_regions(nid);
}
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