60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/*
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* arch/sh/mm/numa.c - Multiple node support for SH machines
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*
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* Copyright (C) 2007 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/module.h>
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#include <linux/memblock.h>
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#include <linux/mm.h>
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#include <linux/numa.h>
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#include <linux/pfn.h>
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#include <asm/sections.h>
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struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
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EXPORT_SYMBOL_GPL(node_data);
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/*
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* On SH machines the conventional approach is to stash system RAM
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* in node 0, and other memory blocks in to node 1 and up, ordered by
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* latency. Each node's pgdat is node-local at the beginning of the node,
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* immediately followed by the node mem map.
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*/
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void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
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{
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unsigned long start_pfn, end_pfn;
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/* Don't allow bogus node assignment */
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BUG_ON(nid >= MAX_NUMNODES || nid <= 0);
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start_pfn = PFN_DOWN(start);
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end_pfn = PFN_DOWN(end);
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pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
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PAGE_KERNEL);
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memblock_add(start, end - start);
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__add_active_range(nid, start_pfn, end_pfn);
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/* Node-local pgdat */
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NODE_DATA(nid) = memblock_alloc_node(sizeof(struct pglist_data),
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SMP_CACHE_BYTES, nid);
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if (!NODE_DATA(nid))
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panic("%s: Failed to allocate %zu bytes align=0x%x nid=%d\n",
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__func__, sizeof(struct pglist_data), SMP_CACHE_BYTES,
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nid);
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NODE_DATA(nid)->node_start_pfn = start_pfn;
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NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
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/* It's up */
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node_set_online(nid);
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/* Kick sparsemem */
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sparse_memory_present_with_active_regions(nid);
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}
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