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