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62 lines
1.5 KiB
62 lines
1.5 KiB
20 years ago
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/*
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* linux/include/asm-sh/mmzone.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_SH_MMZONE_H
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#define __ASM_SH_MMZONE_H
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#include <linux/config.h>
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#ifdef CONFIG_DISCONTIGMEM
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/* Currently, just for HP690 */
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#define PHYSADDR_TO_NID(phys) ((((phys) - __MEMORY_START) >= 0x01000000)?1:0)
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extern pg_data_t discontig_page_data[MAX_NUMNODES];
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extern bootmem_data_t discontig_node_bdata[MAX_NUMNODES];
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/*
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* Following are macros that each numa implmentation must define.
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*/
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/*
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* Given a kernel address, find the home node of the underlying memory.
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*/
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#define KVADDR_TO_NID(kaddr) PHYSADDR_TO_NID(__pa(kaddr))
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/*
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* Return a pointer to the node data for node n.
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*/
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#define NODE_DATA(nid) (&discontig_page_data[nid])
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/*
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* NODE_MEM_MAP gives the kaddr for the mem_map of the node.
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*/
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#define NODE_MEM_MAP(nid) (NODE_DATA(nid)->node_mem_map)
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#define phys_to_page(phys) \
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({ unsigned int node = PHYSADDR_TO_NID(phys); \
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NODE_MEM_MAP(node) \
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+ (((phys) - NODE_DATA(node)->node_start_paddr) >> PAGE_SHIFT); })
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static inline int is_valid_page(struct page *page)
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{
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unsigned int i;
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for (i = 0; i < MAX_NUMNODES; i++) {
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if (page >= NODE_MEM_MAP(i) &&
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page < NODE_MEM_MAP(i) + NODE_DATA(i)->node_size)
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return 1;
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}
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return 0;
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}
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#define VALID_PAGE(page) is_valid_page(page)
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#define page_to_phys(page) PHYSADDR(page_address(page))
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#endif /* CONFIG_DISCONTIGMEM */
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#endif
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