Pull fluff into release branch
[linux-3.10.git] / drivers / acpi / tables.c
1 /*
2  *  acpi_tables.c - ACPI Boot-Time Table Parsing
3  *
4  *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.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
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/smp.h>
29 #include <linux/string.h>
30 #include <linux/types.h>
31 #include <linux/irq.h>
32 #include <linux/errno.h>
33 #include <linux/acpi.h>
34 #include <linux/bootmem.h>
35
36 #define PREFIX                  "ACPI: "
37
38 #define ACPI_MAX_TABLES         128
39
40 static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
41 static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
42
43 static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
44
45 void acpi_table_print_madt_entry(struct acpi_subtable_header * header)
46 {
47         if (!header)
48                 return;
49
50         switch (header->type) {
51
52         case ACPI_MADT_TYPE_LOCAL_APIC:
53                 {
54                         struct acpi_madt_local_apic *p =
55                             (struct acpi_madt_local_apic *)header;
56                         printk(KERN_INFO PREFIX
57                                "LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
58                                p->processor_id, p->id,
59                                (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
60                 }
61                 break;
62
63         case ACPI_MADT_TYPE_IO_APIC:
64                 {
65                         struct acpi_madt_io_apic *p =
66                             (struct acpi_madt_io_apic *)header;
67                         printk(KERN_INFO PREFIX
68                                "IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
69                                p->id, p->address, p->global_irq_base);
70                 }
71                 break;
72
73         case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
74                 {
75                         struct acpi_madt_interrupt_override *p =
76                             (struct acpi_madt_interrupt_override *)header;
77                         printk(KERN_INFO PREFIX
78                                "INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
79                                p->bus, p->source_irq, p->global_irq,
80                                mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
81                                mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
82                         if (p->inti_flags  &
83                             ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
84                                 printk(KERN_INFO PREFIX
85                                        "INT_SRC_OVR unexpected reserved flags: 0x%x\n",
86                                        p->inti_flags  &
87                                         ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
88
89                 }
90                 break;
91
92         case ACPI_MADT_TYPE_NMI_SOURCE:
93                 {
94                         struct acpi_madt_nmi_source *p =
95                             (struct acpi_madt_nmi_source *)header;
96                         printk(KERN_INFO PREFIX
97                                "NMI_SRC (%s %s global_irq %d)\n",
98                                mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
99                                mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
100                                p->global_irq);
101                 }
102                 break;
103
104         case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
105                 {
106                         struct acpi_madt_local_apic_nmi *p =
107                             (struct acpi_madt_local_apic_nmi *)header;
108                         printk(KERN_INFO PREFIX
109                                "LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
110                                p->processor_id,
111                                mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK  ],
112                                mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
113                                p->lint);
114                 }
115                 break;
116
117         case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
118                 {
119                         struct acpi_madt_local_apic_override *p =
120                             (struct acpi_madt_local_apic_override *)header;
121                         printk(KERN_INFO PREFIX
122                                "LAPIC_ADDR_OVR (address[%p])\n",
123                                (void *)(unsigned long)p->address);
124                 }
125                 break;
126
127         case ACPI_MADT_TYPE_IO_SAPIC:
128                 {
129                         struct acpi_madt_io_sapic *p =
130                             (struct acpi_madt_io_sapic *)header;
131                         printk(KERN_INFO PREFIX
132                                "IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
133                                p->id, (void *)(unsigned long)p->address,
134                                p->global_irq_base);
135                 }
136                 break;
137
138         case ACPI_MADT_TYPE_LOCAL_SAPIC:
139                 {
140                         struct acpi_madt_local_sapic *p =
141                             (struct acpi_madt_local_sapic *)header;
142                         printk(KERN_INFO PREFIX
143                                "LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
144                                p->processor_id, p->id, p->eid,
145                                (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
146                 }
147                 break;
148
149         case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
150                 {
151                         struct acpi_madt_interrupt_source *p =
152                             (struct acpi_madt_interrupt_source *)header;
153                         printk(KERN_INFO PREFIX
154                                "PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
155                                mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
156                                mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
157                                p->type, p->id, p->eid, p->io_sapic_vector,
158                                p->global_irq);
159                 }
160                 break;
161
162         default:
163                 printk(KERN_WARNING PREFIX
164                        "Found unsupported MADT entry (type = 0x%x)\n",
165                        header->type);
166                 break;
167         }
168 }
169
170
171 int __init
172 acpi_table_parse_entries(char *id,
173                              unsigned long table_size,
174                              int entry_id,
175                              acpi_table_entry_handler handler,
176                              unsigned int max_entries)
177 {
178         struct acpi_table_header *table_header = NULL;
179         struct acpi_subtable_header *entry;
180         unsigned int count = 0;
181         unsigned long table_end;
182
183         if (!handler)
184                 return -EINVAL;
185
186         /* Locate the table (if exists). There should only be one. */
187         acpi_get_table(id, 0, &table_header);
188
189         if (!table_header) {
190                 printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
191                 return -ENODEV;
192         }
193
194         table_end = (unsigned long)table_header + table_header->length;
195
196         /* Parse all entries looking for a match. */
197
198         entry = (struct acpi_subtable_header *)
199             ((unsigned long)table_header + table_size);
200
201         while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
202                table_end) {
203                 if (entry->type == entry_id
204                     && (!max_entries || count++ < max_entries))
205                         if (handler(entry, table_end))
206                                 return -EINVAL;
207
208                 entry = (struct acpi_subtable_header *)
209                     ((unsigned long)entry + entry->length);
210         }
211         if (max_entries && count > max_entries) {
212                 printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of "
213                        "%i found\n", id, entry_id, count - max_entries, count);
214         }
215
216         return count;
217 }
218
219 int __init
220 acpi_table_parse_madt(enum acpi_madt_type id,
221                       acpi_table_entry_handler handler, unsigned int max_entries)
222 {
223         return acpi_table_parse_entries(ACPI_SIG_MADT,
224                                             sizeof(struct acpi_table_madt), id,
225                                             handler, max_entries);
226 }
227
228 /**
229  * acpi_table_parse - find table with @id, run @handler on it
230  *
231  * @id: table id to find
232  * @handler: handler to run
233  *
234  * Scan the ACPI System Descriptor Table (STD) for a table matching @id,
235  * run @handler on it.  Return 0 if table found, return on if not.
236  */
237 int __init acpi_table_parse(char *id, acpi_table_handler handler)
238 {
239         struct acpi_table_header *table = NULL;
240         if (!handler)
241                 return -EINVAL;
242
243         acpi_get_table(id, 0, &table);
244         if (table) {
245                 handler(table);
246                 return 0;
247         } else
248                 return 1;
249 }
250
251 /*
252  * acpi_table_init()
253  *
254  * find RSDP, find and checksum SDT/XSDT.
255  * checksum all tables, print SDT/XSDT
256  *
257  * result: sdt_entry[] is initialized
258  */
259
260
261 int __init acpi_table_init(void)
262 {
263         acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
264         return 0;
265 }