tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
3 * Rewritten for Linux 2.6 by Christoph Hellwig (hch@lst.de) Jan 2004
4 */
5#ifndef _ASM_MMZONE_H_
6#define _ASM_MMZONE_H_
7
8#include <linux/config.h>
9#include <asm/page.h>
10#include <mmzone.h>
11
12#ifdef CONFIG_DISCONTIGMEM
13
14#define kvaddr_to_nid(kvaddr) pa_to_nid(__pa(kvaddr))
15#define pfn_to_nid(pfn) pa_to_nid((pfn) << PAGE_SHIFT)
16
17#define pfn_valid(pfn) \
18({ \
19 unsigned long __pfn = (pfn); \
20 int __n = pfn_to_nid(__pfn); \
21 ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
22 NODE_DATA(__n)->node_spanned_pages) : 0);\
23})
24
25#define pfn_to_page(pfn) \
26({ \
27 unsigned long __pfn = (pfn); \
28 pg_data_t *__pg = NODE_DATA(pfn_to_nid(__pfn)); \
29 __pg->node_mem_map + (__pfn - __pg->node_start_pfn); \
30})
31
32#define page_to_pfn(p) \
33({ \
34 struct page *__p = (p); \
35 struct zone *__z = page_zone(__p); \
36 ((__p - __z->zone_mem_map) + __z->zone_start_pfn); \
37})
38
39/* XXX: FIXME -- wli */
40#define kern_addr_valid(addr) (0)
41
42#endif /* CONFIG_DISCONTIGMEM */
43
44#endif /* _ASM_MMZONE_H_ */