Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / drivers / acpi / numa.c
1 /*
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
39 extern int __init acpi_table_parse_madt_family(enum acpi_table_id id,
40                                                unsigned long madt_size,
41                                                int entry_id,
42                                                acpi_madt_entry_handler handler,
43                                                unsigned int max_entries);
44
45 void __init acpi_table_print_srat_entry(acpi_table_entry_header * header)
46 {
47
48         ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
49
50         if (!header)
51                 return;
52
53         switch (header->type) {
54
55         case ACPI_SRAT_PROCESSOR_AFFINITY:
56 #ifdef ACPI_DEBUG_OUTPUT
57                 {
58                         struct acpi_table_processor_affinity *p =
59                             (struct acpi_table_processor_affinity *)header;
60                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
61                                           "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
62                                           p->apic_id, p->lsapic_eid,
63                                           p->proximity_domain,
64                                           p->flags.
65                                           enabled ? "enabled" : "disabled"));
66                 }
67 #endif                          /* ACPI_DEBUG_OUTPUT */
68                 break;
69
70         case ACPI_SRAT_MEMORY_AFFINITY:
71 #ifdef ACPI_DEBUG_OUTPUT
72                 {
73                         struct acpi_table_memory_affinity *p =
74                             (struct acpi_table_memory_affinity *)header;
75                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
76                                           "SRAT Memory (0x%08x%08x length 0x%08x%08x type 0x%x) in proximity domain %d %s%s\n",
77                                           p->base_addr_hi, p->base_addr_lo,
78                                           p->length_hi, p->length_lo,
79                                           p->memory_type, p->proximity_domain,
80                                           p->flags.
81                                           enabled ? "enabled" : "disabled",
82                                           p->flags.
83                                           hot_pluggable ? " hot-pluggable" :
84                                           ""));
85                 }
86 #endif                          /* ACPI_DEBUG_OUTPUT */
87                 break;
88
89         default:
90                 printk(KERN_WARNING PREFIX
91                        "Found unsupported SRAT entry (type = 0x%x)\n",
92                        header->type);
93                 break;
94         }
95 }
96
97 static int __init acpi_parse_slit(unsigned long phys_addr, unsigned long size)
98 {
99         struct acpi_table_slit *slit;
100         u32 localities;
101
102         if (!phys_addr || !size)
103                 return -EINVAL;
104
105         slit = (struct acpi_table_slit *)__va(phys_addr);
106
107         /* downcast just for %llu vs %lu for i386/ia64  */
108         localities = (u32) slit->localities;
109
110         acpi_numa_slit_init(slit);
111
112         return 0;
113 }
114
115 static int __init
116 acpi_parse_processor_affinity(acpi_table_entry_header * header,
117                               const unsigned long end)
118 {
119         struct acpi_table_processor_affinity *processor_affinity;
120
121         processor_affinity = (struct acpi_table_processor_affinity *)header;
122         if (!processor_affinity)
123                 return -EINVAL;
124
125         acpi_table_print_srat_entry(header);
126
127         /* let architecture-dependent part to do it */
128         acpi_numa_processor_affinity_init(processor_affinity);
129
130         return 0;
131 }
132
133 static int __init
134 acpi_parse_memory_affinity(acpi_table_entry_header * header,
135                            const unsigned long end)
136 {
137         struct acpi_table_memory_affinity *memory_affinity;
138
139         memory_affinity = (struct acpi_table_memory_affinity *)header;
140         if (!memory_affinity)
141                 return -EINVAL;
142
143         acpi_table_print_srat_entry(header);
144
145         /* let architecture-dependent part to do it */
146         acpi_numa_memory_affinity_init(memory_affinity);
147
148         return 0;
149 }
150
151 static int __init acpi_parse_srat(unsigned long phys_addr, unsigned long size)
152 {
153         struct acpi_table_srat *srat;
154
155         if (!phys_addr || !size)
156                 return -EINVAL;
157
158         srat = (struct acpi_table_srat *)__va(phys_addr);
159
160         return 0;
161 }
162
163 int __init
164 acpi_table_parse_srat(enum acpi_srat_entry_id id,
165                       acpi_madt_entry_handler handler, unsigned int max_entries)
166 {
167         return acpi_table_parse_madt_family(ACPI_SRAT,
168                                             sizeof(struct acpi_table_srat), id,
169                                             handler, max_entries);
170 }
171
172 int __init acpi_numa_init(void)
173 {
174         int result;
175
176         /* SRAT: Static Resource Affinity Table */
177         result = acpi_table_parse(ACPI_SRAT, acpi_parse_srat);
178
179         if (result > 0) {
180                 result = acpi_table_parse_srat(ACPI_SRAT_PROCESSOR_AFFINITY,
181                                                acpi_parse_processor_affinity,
182                                                NR_CPUS);
183                 result = acpi_table_parse_srat(ACPI_SRAT_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific
184         }
185
186         /* SLIT: System Locality Information Table */
187         result = acpi_table_parse(ACPI_SLIT, acpi_parse_slit);
188
189         acpi_numa_arch_fixup();
190         return 0;
191 }
192
193 int acpi_get_pxm(acpi_handle h)
194 {
195         unsigned long pxm;
196         acpi_status status;
197         acpi_handle handle;
198         acpi_handle phandle = h;
199
200         do {
201                 handle = phandle;
202                 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
203                 if (ACPI_SUCCESS(status))
204                         return (int)pxm;
205                 status = acpi_get_parent(handle, &phandle);
206         } while (ACPI_SUCCESS(status));
207         return -1;
208 }
209
210 EXPORT_SYMBOL(acpi_get_pxm);