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/*
* Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
* Rewritten for Linux 2.6 by Christoph Hellwig (hch@lst.de) Jan 2004
*/
#ifndef _ASM_MMZONE_H_
#define _ASM_MMZONE_H_
#include <asm/page.h>
#include <mmzone.h>
#ifdef CONFIG_DISCONTIGMEM
#define kvaddr_to_nid(kvaddr) pa_to_nid(__pa(kvaddr))
#define pfn_to_nid(pfn) pa_to_nid((pfn) << PAGE_SHIFT)
#define pfn_valid(pfn) \
({ \
unsigned long __pfn = (pfn); \
int __n = pfn_to_nid(__pfn); \
((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
NODE_DATA(__n)->node_spanned_pages) : 0);\
})
#define pfn_to_page(pfn) \
({ \
unsigned long __pfn = (pfn); \
pg_data_t *__pg = NODE_DATA(pfn_to_nid(__pfn)); \
__pg->node_mem_map + (__pfn - __pg->node_start_pfn); \
})
#define page_to_pfn(p) \
({ \
struct page *__p = (p); \
struct zone *__z = page_zone(__p); \
((__p - __z->zone_mem_map) + __z->zone_start_pfn); \
})
/* XXX: FIXME -- wli */
#define kern_addr_valid(addr) (0)
#endif /* CONFIG_DISCONTIGMEM */
#endif /* _ASM_MMZONE_H_ */
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