1/*
2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
3 *
4 *   This program is free software; you can redistribute it and/or
5 *   modify it under the terms of the GNU General Public License
6 *   as published by the Free Software Foundation, version 2.
7 *
8 *   This program is distributed in the hope that it will be useful, but
9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 */
14
15#ifndef _ASM_TILE_MMZONE_H
16#define _ASM_TILE_MMZONE_H
17
18extern struct pglist_data node_data[];
19#define NODE_DATA(nid)	(&node_data[nid])
20
21extern void get_memcfg_numa(void);
22
23#ifdef CONFIG_DISCONTIGMEM
24
25#include <asm/page.h>
26
27/*
28 * Generally, memory ranges are always doled out by the hypervisor in
29 * fixed-size, power-of-two increments.  That would make computing the node
30 * very easy.  We could just take a couple high bits of the PA, which
31 * denote the memory shim, and we'd be done.  However, when we're doing
32 * memory striping, this may not be true; PAs with different high bit
33 * values might be in the same node.  Thus, we keep a lookup table to
34 * translate the high bits of the PFN to the node number.
35 */
36extern int highbits_to_node[];
37
38static inline int pfn_to_nid(unsigned long pfn)
39{
40	return highbits_to_node[__pfn_to_highbits(pfn)];
41}
42
43#define kern_addr_valid(kaddr)	virt_addr_valid((void *)kaddr)
44
45static inline int pfn_valid(int pfn)
46{
47	int nid = pfn_to_nid(pfn);
48
49	if (nid >= 0)
50		return (pfn < node_end_pfn(nid));
51	return 0;
52}
53
54/* Information on the NUMA nodes that we compute early */
55extern unsigned long node_start_pfn[];
56extern unsigned long node_end_pfn[];
57extern unsigned long node_memmap_pfn[];
58extern unsigned long node_percpu_pfn[];
59extern unsigned long node_free_pfn[];
60#ifdef CONFIG_HIGHMEM
61extern unsigned long node_lowmem_end_pfn[];
62#endif
63#ifdef CONFIG_PCI
64extern unsigned long pci_reserve_start_pfn;
65extern unsigned long pci_reserve_end_pfn;
66#endif
67
68#endif /* CONFIG_DISCONTIGMEM */
69
70#endif /* _ASM_TILE_MMZONE_H */
71