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