1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
4 * Adapted for the alpha wildfire architecture Jan 2001.
5 */
6#ifndef _ASM_MMZONE_H_
7#define _ASM_MMZONE_H_
8
9#include <asm/smp.h>
10
11/*
12 * Following are macros that are specific to this numa platform.
13 */
14
15extern pg_data_t node_data[];
16
17#define alpha_pa_to_nid(pa)		\
18        (alpha_mv.pa_to_nid 		\
19	 ? alpha_mv.pa_to_nid(pa)	\
20	 : (0))
21#define node_mem_start(nid)		\
22        (alpha_mv.node_mem_start 	\
23	 ? alpha_mv.node_mem_start(nid) \
24	 : (0UL))
25#define node_mem_size(nid)		\
26        (alpha_mv.node_mem_size 	\
27	 ? alpha_mv.node_mem_size(nid) 	\
28	 : ((nid) ? (0UL) : (~0UL)))
29
30#define pa_to_nid(pa)		alpha_pa_to_nid(pa)
31#define NODE_DATA(nid)		(&node_data[(nid)])
32
33#define node_localnr(pfn, nid)	((pfn) - NODE_DATA(nid)->node_start_pfn)
34
35#if 1
36#define PLAT_NODE_DATA_LOCALNR(p, n)	\
37	(((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
38#else
39static inline unsigned long
40PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
41{
42	unsigned long temp;
43	temp = p >> PAGE_SHIFT;
44	return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
45}
46#endif
47
48#ifdef CONFIG_DISCONTIGMEM
49
50/*
51 * Following are macros that each numa implementation must define.
52 */
53
54/*
55 * Given a kernel address, find the home node of the underlying memory.
56 */
57#define kvaddr_to_nid(kaddr)	pa_to_nid(__pa(kaddr))
58
59/*
60 * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
61 * and returns the kaddr corresponding to first physical page in the
62 * node's mem_map.
63 */
64#define LOCAL_BASE_ADDR(kaddr)						  \
65    ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn  \
66			 << PAGE_SHIFT))
67
68/* XXX: FIXME -- nyc */
69#define kern_addr_valid(kaddr)	(0)
70
71#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
72
73#define pmd_page(pmd)		(pfn_to_page(pmd_val(pmd) >> 32))
74#define pte_pfn(pte)		(pte_val(pte) >> 32)
75
76#define mk_pte(page, pgprot)						     \
77({								 	     \
78	pte_t pte;                                                           \
79	unsigned long pfn;                                                   \
80									     \
81	pfn = page_to_pfn(page) << 32; \
82	pte_val(pte) = pfn | pgprot_val(pgprot);			     \
83									     \
84	pte;								     \
85})
86
87#define pte_page(x)							\
88({									\
89       	unsigned long kvirt;						\
90	struct page * __xx;						\
91									\
92	kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));	\
93	__xx = virt_to_page(kvirt);					\
94									\
95	__xx;                                                           \
96})
97
98#define page_to_pa(page)						\
99	(page_to_pfn(page) << PAGE_SHIFT)
100
101#define pfn_to_nid(pfn)		pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
102#define pfn_valid(pfn)							\
103	(((pfn) - node_start_pfn(pfn_to_nid(pfn))) <			\
104	 node_spanned_pages(pfn_to_nid(pfn)))					\
105
106#define virt_addr_valid(kaddr)	pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
107
108#endif /* CONFIG_DISCONTIGMEM */
109
110#endif /* _ASM_MMZONE_H_ */
111