2 * acpi_tables.c - ACPI Boot-Time Table Parsing
4 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/sched.h>
29 #include <linux/smp.h>
30 #include <linux/string.h>
31 #include <linux/types.h>
32 #include <linux/irq.h>
33 #include <linux/errno.h>
34 #include <linux/acpi.h>
35 #include <linux/bootmem.h>
37 #define PREFIX "ACPI: "
39 #define ACPI_MAX_TABLES 128
41 static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
42 static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
44 static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
46 void acpi_table_print_madt_entry(struct acpi_subtable_header * header)
51 switch (header->type) {
53 case ACPI_MADT_TYPE_LOCAL_APIC:
55 struct acpi_madt_local_apic *p =
56 (struct acpi_madt_local_apic *)header;
57 printk(KERN_INFO PREFIX
58 "LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
59 p->processor_id, p->id,
60 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
64 case ACPI_MADT_TYPE_IO_APIC:
66 struct acpi_madt_io_apic *p =
67 (struct acpi_madt_io_apic *)header;
68 printk(KERN_INFO PREFIX
69 "IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
70 p->id, p->address, p->global_irq_base);
74 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
76 struct acpi_madt_interrupt_override *p =
77 (struct acpi_madt_interrupt_override *)header;
78 printk(KERN_INFO PREFIX
79 "INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
80 p->bus, p->source_irq, p->global_irq,
81 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
82 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
84 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
85 printk(KERN_INFO PREFIX
86 "INT_SRC_OVR unexpected reserved flags: 0x%x\n",
88 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
93 case ACPI_MADT_TYPE_NMI_SOURCE:
95 struct acpi_madt_nmi_source *p =
96 (struct acpi_madt_nmi_source *)header;
97 printk(KERN_INFO PREFIX
98 "NMI_SRC (%s %s global_irq %d)\n",
99 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
100 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
105 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
107 struct acpi_madt_local_apic_nmi *p =
108 (struct acpi_madt_local_apic_nmi *)header;
109 printk(KERN_INFO PREFIX
110 "LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
112 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
113 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
118 case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
120 struct acpi_madt_local_apic_override *p =
121 (struct acpi_madt_local_apic_override *)header;
122 printk(KERN_INFO PREFIX
123 "LAPIC_ADDR_OVR (address[%p])\n",
124 (void *)(unsigned long)p->address);
128 case ACPI_MADT_TYPE_IO_SAPIC:
130 struct acpi_madt_io_sapic *p =
131 (struct acpi_madt_io_sapic *)header;
132 printk(KERN_INFO PREFIX
133 "IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
134 p->id, (void *)(unsigned long)p->address,
139 case ACPI_MADT_TYPE_LOCAL_SAPIC:
141 struct acpi_madt_local_sapic *p =
142 (struct acpi_madt_local_sapic *)header;
143 printk(KERN_INFO PREFIX
144 "LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
145 p->processor_id, p->id, p->eid,
146 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
150 case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
152 struct acpi_madt_interrupt_source *p =
153 (struct acpi_madt_interrupt_source *)header;
154 printk(KERN_INFO PREFIX
155 "PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
156 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
157 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
158 p->type, p->id, p->eid, p->io_sapic_vector,
164 printk(KERN_WARNING PREFIX
165 "Found unsupported MADT entry (type = 0x%x)\n",
173 acpi_table_parse_madt_family(char *id,
174 unsigned long madt_size,
176 acpi_madt_entry_handler handler,
177 unsigned int max_entries)
179 struct acpi_table_header *madt = NULL;
180 struct acpi_subtable_header *entry;
181 unsigned int count = 0;
182 unsigned long madt_end;
187 /* Locate the MADT (if exists). There should only be one. */
188 acpi_get_table(id, 0, &madt);
191 printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
195 madt_end = (unsigned long)madt + madt->length;
197 /* Parse all entries looking for a match. */
199 entry = (struct acpi_subtable_header *)
200 ((unsigned long)madt + madt_size);
202 while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
204 if (entry->type == entry_id
205 && (!max_entries || count++ < max_entries))
206 if (handler(entry, madt_end))
209 entry = (struct acpi_subtable_header *)
210 ((unsigned long)entry + entry->length);
212 if (max_entries && count > max_entries) {
213 printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of "
214 "%i found\n", id, entry_id, count - max_entries, count);
221 acpi_table_parse_madt(enum acpi_madt_type id,
222 acpi_madt_entry_handler handler, unsigned int max_entries)
224 return acpi_table_parse_madt_family(ACPI_SIG_MADT,
225 sizeof(struct acpi_table_madt), id,
226 handler, max_entries);
229 int __init acpi_table_parse(char *id, acpi_table_handler handler)
231 struct acpi_table_header *table = NULL;
235 acpi_get_table(id, 0, &table);
246 * find RSDP, find and checksum SDT/XSDT.
247 * checksum all tables, print SDT/XSDT
249 * result: sdt_entry[] is initialized
253 int __init acpi_table_init(void)
255 acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);