1/*
  2 * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
  3 * Adapted for the alpha wildfire architecture Jan 2001.
  4 */
  5#ifndef _ASM_MMZONE_H_
  6#define _ASM_MMZONE_H_
  7
  8#include <asm/smp.h>
  9
 10struct bootmem_data_t; /* stupid forward decl. */
 11
 12/*
 13 * Following are macros that are specific to this numa platform.
 14 */
 15
 16extern pg_data_t node_data[];
 17
 18#define alpha_pa_to_nid(pa)		\
 19        (alpha_mv.pa_to_nid 		\
 20	 ? alpha_mv.pa_to_nid(pa)	\
 21	 : (0))
 22#define node_mem_start(nid)		\
 23        (alpha_mv.node_mem_start 	\
 24	 ? alpha_mv.node_mem_start(nid) \
 25	 : (0UL))
 26#define node_mem_size(nid)		\
 27        (alpha_mv.node_mem_size 	\
 28	 ? alpha_mv.node_mem_size(nid) 	\
 29	 : ((nid) ? (0UL) : (~0UL)))
 30
 31#define pa_to_nid(pa)		alpha_pa_to_nid(pa)
 32#define NODE_DATA(nid)		(&node_data[(nid)])
 33
 34#define node_localnr(pfn, nid)	((pfn) - NODE_DATA(nid)->node_start_pfn)
 35
 36#if 1
 37#define PLAT_NODE_DATA_LOCALNR(p, n)	\
 38	(((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
 39#else
 40static inline unsigned long
 41PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
 42{
 43	unsigned long temp;
 44	temp = p >> PAGE_SHIFT;
 45	return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
 46}
 47#endif
 48
 49#ifdef CONFIG_DISCONTIGMEM
 50
 51/*
 52 * Following are macros that each numa implementation must define.
 53 */
 54
 55/*
 56 * Given a kernel address, find the home node of the underlying memory.
 57 */
 58#define kvaddr_to_nid(kaddr)	pa_to_nid(__pa(kaddr))
 59
 60/*
 61 * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
 62 * and returns the kaddr corresponding to first physical page in the
 63 * node's mem_map.
 64 */
 65#define LOCAL_BASE_ADDR(kaddr)						  \
 66    ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn  \
 67			 << PAGE_SHIFT))
 68
 69/* XXX: FIXME -- wli */
 70#define kern_addr_valid(kaddr)	(0)
 71
 72#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 73
 74#define VALID_PAGE(page)	(((page) - mem_map) < max_mapnr)
 75
 76#define pmd_page(pmd)		(pfn_to_page(pmd_val(pmd) >> 32))
 77#define pgd_page(pgd)		(pfn_to_page(pgd_val(pgd) >> 32))
 78#define pte_pfn(pte)		(pte_val(pte) >> 32)
 79
 80#define mk_pte(page, pgprot)						     \
 81({								 	     \
 82	pte_t pte;                                                           \
 83	unsigned long pfn;                                                   \
 84									     \
 85	pfn = page_to_pfn(page) << 32; \
 86	pte_val(pte) = pfn | pgprot_val(pgprot);			     \
 87									     \
 88	pte;								     \
 89})
 90
 91#define pte_page(x)							\
 92({									\
 93       	unsigned long kvirt;						\
 94	struct page * __xx;						\
 95									\
 96	kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));	\
 97	__xx = virt_to_page(kvirt);					\
 98									\
 99	__xx;                                                           \
100})
101
102#define page_to_pa(page)						\
103	(page_to_pfn(page) << PAGE_SHIFT)
104
105#define pfn_to_nid(pfn)		pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
106#define pfn_valid(pfn)							\
107	(((pfn) - node_start_pfn(pfn_to_nid(pfn))) <			\
108	 node_spanned_pages(pfn_to_nid(pfn)))					\
109
110#define virt_addr_valid(kaddr)	pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
111
112#endif /* CONFIG_DISCONTIGMEM */
113
114#endif /* _ASM_MMZONE_H_ */