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