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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * acpi_numa.c - ACPI NUMA support
3 *
4 * Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 */
25#include <linux/module.h>
26#include <linux/config.h>
27#include <linux/init.h>
28#include <linux/kernel.h>
29#include <linux/types.h>
30#include <linux/errno.h>
31#include <linux/acpi.h>
32#include <acpi/acpi_bus.h>
33#include <acpi/acmacros.h>
34
35#define ACPI_NUMA 0x80000000
36#define _COMPONENT ACPI_NUMA
37 ACPI_MODULE_NAME ("numa")
38
39extern int __init acpi_table_parse_madt_family (enum acpi_table_id id, unsigned long madt_size, int entry_id, acpi_madt_entry_handler handler, unsigned int max_entries);
40
41void __init
42acpi_table_print_srat_entry (
43 acpi_table_entry_header *header)
44{
45
46 ACPI_FUNCTION_NAME ("acpi_table_print_srat_entry");
47
48 if (!header)
49 return;
50
51 switch (header->type) {
52
53 case ACPI_SRAT_PROCESSOR_AFFINITY:
54#ifdef ACPI_DEBUG_OUTPUT
55 {
56 struct acpi_table_processor_affinity *p =
57 (struct acpi_table_processor_affinity*) header;
58 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
59 p->apic_id, p->lsapic_eid, p->proximity_domain,
60 p->flags.enabled?"enabled":"disabled"));
61 }
62#endif /* ACPI_DEBUG_OUTPUT */
63 break;
64
65 case ACPI_SRAT_MEMORY_AFFINITY:
66#ifdef ACPI_DEBUG_OUTPUT
67 {
68 struct acpi_table_memory_affinity *p =
69 (struct acpi_table_memory_affinity*) header;
70 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SRAT Memory (0x%08x%08x length 0x%08x%08x type 0x%x) in proximity domain %d %s%s\n",
71 p->base_addr_hi, p->base_addr_lo, p->length_hi, p->length_lo,
72 p->memory_type, p->proximity_domain,
73 p->flags.enabled ? "enabled" : "disabled",
74 p->flags.hot_pluggable ? " hot-pluggable" : ""));
75 }
76#endif /* ACPI_DEBUG_OUTPUT */
77 break;
78
79 default:
80 printk(KERN_WARNING PREFIX "Found unsupported SRAT entry (type = 0x%x)\n",
81 header->type);
82 break;
83 }
84}
85
86
87static int __init
88acpi_parse_slit (unsigned long phys_addr, unsigned long size)
89{
90 struct acpi_table_slit *slit;
91 u32 localities;
92
93 if (!phys_addr || !size)
94 return -EINVAL;
95
96 slit = (struct acpi_table_slit *) __va(phys_addr);
97
98 /* downcast just for %llu vs %lu for i386/ia64 */
99 localities = (u32) slit->localities;
100
101 acpi_numa_slit_init(slit);
102
103 return 0;
104}
105
106
107static int __init
108acpi_parse_processor_affinity (
109 acpi_table_entry_header *header,
110 const unsigned long end)
111{
112 struct acpi_table_processor_affinity *processor_affinity;
113
114 processor_affinity = (struct acpi_table_processor_affinity*) header;
115 if (!processor_affinity)
116 return -EINVAL;
117
118 acpi_table_print_srat_entry(header);
119
120 /* let architecture-dependent part to do it */
121 acpi_numa_processor_affinity_init(processor_affinity);
122
123 return 0;
124}
125
126
127static int __init
128acpi_parse_memory_affinity (
129 acpi_table_entry_header *header,
130 const unsigned long end)
131{
132 struct acpi_table_memory_affinity *memory_affinity;
133
134 memory_affinity = (struct acpi_table_memory_affinity*) header;
135 if (!memory_affinity)
136 return -EINVAL;
137
138 acpi_table_print_srat_entry(header);
139
140 /* let architecture-dependent part to do it */
141 acpi_numa_memory_affinity_init(memory_affinity);
142
143 return 0;
144}
145
146
147static int __init
148acpi_parse_srat (unsigned long phys_addr, unsigned long size)
149{
150 struct acpi_table_srat *srat;
151
152 if (!phys_addr || !size)
153 return -EINVAL;
154
155 srat = (struct acpi_table_srat *) __va(phys_addr);
156
157 return 0;
158}
159
160
161int __init
162acpi_table_parse_srat (
163 enum acpi_srat_entry_id id,
164 acpi_madt_entry_handler handler,
165 unsigned int max_entries)
166{
167 return acpi_table_parse_madt_family(ACPI_SRAT, sizeof(struct acpi_table_srat),
168 id, handler, max_entries);
169}
170
171
172int __init
173acpi_numa_init(void)
174{
175 int result;
176
177 /* SRAT: Static Resource Affinity Table */
178 result = acpi_table_parse(ACPI_SRAT, acpi_parse_srat);
179
180 if (result > 0) {
181 result = acpi_table_parse_srat(ACPI_SRAT_PROCESSOR_AFFINITY,
182 acpi_parse_processor_affinity,
183 NR_CPUS);
184 result = acpi_table_parse_srat(ACPI_SRAT_MEMORY_AFFINITY,
185 acpi_parse_memory_affinity,
186 NR_NODE_MEMBLKS); // IA64 specific
187 }
188
189 /* SLIT: System Locality Information Table */
190 result = acpi_table_parse(ACPI_SLIT, acpi_parse_slit);
191
192 acpi_numa_arch_fixup();
193 return 0;
194}
195
196int
197acpi_get_pxm(acpi_handle h)
198{
199 unsigned long pxm;
200 acpi_status status;
201 acpi_handle handle;
202 acpi_handle phandle = h;
203
204 do {
205 handle = phandle;
206 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
207 if (ACPI_SUCCESS(status))
208 return (int)pxm;
209 status = acpi_get_parent(handle, &phandle);
210 } while(ACPI_SUCCESS(status));
211 return -1;
212}
213EXPORT_SYMBOL(acpi_get_pxm);