blob: 3d85225b9e953aa68af579d7300f90119f5e694a [file] [log] [blame]
Paul Mundtb241cb02007-06-06 17:52:19 +09001/*
2 * arch/sh/mm/numa.c - Multiple node support for SH machines
3 *
4 * Copyright (C) 2007 Paul Mundt
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10#include <linux/module.h>
11#include <linux/bootmem.h>
Yinghai Lu95f72d12010-07-12 14:36:09 +100012#include <linux/memblock.h>
Paul Mundtb241cb02007-06-06 17:52:19 +090013#include <linux/mm.h>
14#include <linux/numa.h>
15#include <linux/pfn.h>
16#include <asm/sections.h>
17
Paul Mundtb241cb02007-06-06 17:52:19 +090018struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
19EXPORT_SYMBOL_GPL(node_data);
20
21/*
22 * On SH machines the conventional approach is to stash system RAM
23 * in node 0, and other memory blocks in to node 1 and up, ordered by
24 * latency. Each node's pgdat is node-local at the beginning of the node,
25 * immediately followed by the node mem map.
26 */
Paul Mundtb241cb02007-06-06 17:52:19 +090027void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
28{
Matt Fleming5084f612009-07-03 23:34:51 +010029 unsigned long bootmap_pages;
30 unsigned long start_pfn, end_pfn;
31 unsigned long bootmem_paddr;
Paul Mundtb241cb02007-06-06 17:52:19 +090032
33 /* Don't allow bogus node assignment */
Roel Kluin90163322009-11-02 16:14:42 +000034 BUG_ON(nid > MAX_NUMNODES || nid <= 0);
Paul Mundtb241cb02007-06-06 17:52:19 +090035
Matt Fleming5084f612009-07-03 23:34:51 +010036 start_pfn = start >> PAGE_SHIFT;
Paul Mundtb241cb02007-06-06 17:52:19 +090037 end_pfn = end >> PAGE_SHIFT;
38
Paul Mundt09e11722010-03-03 13:16:31 +090039 pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
40 PAGE_KERNEL);
41
Yinghai Lu95f72d12010-07-12 14:36:09 +100042 memblock_add(start, end - start);
Matt Fleming5084f612009-07-03 23:34:51 +010043
Magnus Damm0146ba72008-04-23 20:56:44 +090044 __add_active_range(nid, start_pfn, end_pfn);
Paul Mundtb241cb02007-06-06 17:52:19 +090045
46 /* Node-local pgdat */
Yinghai Lu95f72d12010-07-12 14:36:09 +100047 NODE_DATA(nid) = __va(memblock_alloc_base(sizeof(struct pglist_data),
Magnus Dammb25b9752009-12-07 14:16:07 +000048 SMP_CACHE_BYTES, end));
Paul Mundtb241cb02007-06-06 17:52:19 +090049 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
50
Johannes Weinerb61bfa32008-07-23 21:26:55 -070051 NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
Paul Mundtb241cb02007-06-06 17:52:19 +090052 NODE_DATA(nid)->node_start_pfn = start_pfn;
53 NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
54
55 /* Node-local bootmap */
56 bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
Yinghai Lu95f72d12010-07-12 14:36:09 +100057 bootmem_paddr = memblock_alloc_base(bootmap_pages << PAGE_SHIFT,
Magnus Dammb25b9752009-12-07 14:16:07 +000058 PAGE_SIZE, end);
Matt Fleming5084f612009-07-03 23:34:51 +010059 init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT,
60 start_pfn, end_pfn);
Paul Mundtb241cb02007-06-06 17:52:19 +090061
62 free_bootmem_with_active_regions(nid, end_pfn);
63
64 /* Reserve the pgdat and bootmap space with the bootmem allocator */
65 reserve_bootmem_node(NODE_DATA(nid), start_pfn << PAGE_SHIFT,
Bernhard Walle72a7fe32008-02-07 00:15:17 -080066 sizeof(struct pglist_data), BOOTMEM_DEFAULT);
Matt Fleming5084f612009-07-03 23:34:51 +010067 reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr,
Bernhard Walle72a7fe32008-02-07 00:15:17 -080068 bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
Paul Mundtb241cb02007-06-06 17:52:19 +090069
70 /* It's up */
71 node_set_online(nid);
72
73 /* Kick sparsemem */
74 sparse_memory_present_with_active_regions(nid);
75}