1/*
 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/memblock.h>
12#include <linux/mm.h>
13#include <linux/numa.h>
14#include <linux/pfn.h>
15#include <asm/sections.h>
16
17struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
18EXPORT_SYMBOL_GPL(node_data);
19
20/*
21 * On SH machines the conventional approach is to stash system RAM
22 * in node 0, and other memory blocks in to node 1 and up, ordered by
23 * latency. Each node's pgdat is node-local at the beginning of the node,
24 * immediately followed by the node mem map.
25 */
26void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
27{
 
28	unsigned long start_pfn, end_pfn;
 
29
30	/* Don't allow bogus node assignment */
31	BUG_ON(nid >= MAX_NUMNODES || nid <= 0);
32
33	start_pfn = PFN_DOWN(start);
34	end_pfn = PFN_DOWN(end);
35
36	pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
37			 PAGE_KERNEL);
38
39	memblock_add(start, end - start);
40
41	__add_active_range(nid, start_pfn, end_pfn);
42
43	/* Node-local pgdat */
44	NODE_DATA(nid) = memblock_alloc_node(sizeof(struct pglist_data),
45					     SMP_CACHE_BYTES, nid);
46	if (!NODE_DATA(nid))
47		panic("%s: Failed to allocate %zu bytes align=0x%x nid=%d\n",
48		      __func__, sizeof(struct pglist_data), SMP_CACHE_BYTES,
49		      nid);
50
 
51	NODE_DATA(nid)->node_start_pfn = start_pfn;
52	NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
53
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
54	/* It's up */
55	node_set_online(nid);
 
 
 
56}

 1/*
 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>
12#include <linux/memblock.h>
13#include <linux/mm.h>
14#include <linux/numa.h>
15#include <linux/pfn.h>
16#include <asm/sections.h>
17
18struct 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 */
27void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
28{
29	unsigned long bootmap_pages;
30	unsigned long start_pfn, end_pfn;
31	unsigned long bootmem_paddr;
32
33	/* Don't allow bogus node assignment */
34	BUG_ON(nid >= MAX_NUMNODES || nid <= 0);
35
36	start_pfn = PFN_DOWN(start);
37	end_pfn = PFN_DOWN(end);
38
39	pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
40			 PAGE_KERNEL);
41
42	memblock_add(start, end - start);
43
44	__add_active_range(nid, start_pfn, end_pfn);
45
46	/* Node-local pgdat */
47	NODE_DATA(nid) = __va(memblock_alloc_base(sizeof(struct pglist_data),
48					     SMP_CACHE_BYTES, end));
49	memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
 
 
 
50
51	NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
52	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);
57	bootmem_paddr = memblock_alloc_base(bootmap_pages << PAGE_SHIFT,
58				       PAGE_SIZE, end);
59	init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT,
60			  start_pfn, end_pfn);
61
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,
66			     sizeof(struct pglist_data), BOOTMEM_DEFAULT);
67	reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr,
68			     bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
69
70	/* It's up */
71	node_set_online(nid);
72
73	/* Kick sparsemem */
74	sparse_memory_present_with_active_regions(nid);
75}