256 lines
6.7 KiB
C
256 lines
6.7 KiB
C
/*
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* acpi_tables.c - ACPI Boot-Time Table Parsing
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*
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* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/irq.h>
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#include <linux/errno.h>
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#include <linux/acpi.h>
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#include <linux/bootmem.h>
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#define PREFIX "ACPI: "
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#define ACPI_MAX_TABLES 128
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static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
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static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
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static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
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void acpi_table_print_madt_entry(acpi_table_entry_header * header)
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{
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if (!header)
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return;
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switch (header->type) {
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case ACPI_MADT_LAPIC:
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{
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struct acpi_table_lapic *p =
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(struct acpi_table_lapic *)header;
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printk(KERN_INFO PREFIX
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"LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
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p->acpi_id, p->id,
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p->flags.enabled ? "enabled" : "disabled");
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}
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break;
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case ACPI_MADT_IOAPIC:
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{
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struct acpi_table_ioapic *p =
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(struct acpi_table_ioapic *)header;
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printk(KERN_INFO PREFIX
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"IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
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p->id, p->address, p->global_irq_base);
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}
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break;
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case ACPI_MADT_INT_SRC_OVR:
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{
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struct acpi_table_int_src_ovr *p =
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(struct acpi_table_int_src_ovr *)header;
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printk(KERN_INFO PREFIX
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"INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
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p->bus, p->bus_irq, p->global_irq,
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mps_inti_flags_polarity[p->flags.polarity],
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mps_inti_flags_trigger[p->flags.trigger]);
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if (p->flags.reserved)
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printk(KERN_INFO PREFIX
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"INT_SRC_OVR unexpected reserved flags: 0x%x\n",
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p->flags.reserved);
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}
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break;
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case ACPI_MADT_NMI_SRC:
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{
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struct acpi_table_nmi_src *p =
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(struct acpi_table_nmi_src *)header;
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printk(KERN_INFO PREFIX
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"NMI_SRC (%s %s global_irq %d)\n",
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mps_inti_flags_polarity[p->flags.polarity],
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mps_inti_flags_trigger[p->flags.trigger],
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p->global_irq);
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}
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break;
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case ACPI_MADT_LAPIC_NMI:
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{
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struct acpi_table_lapic_nmi *p =
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(struct acpi_table_lapic_nmi *)header;
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printk(KERN_INFO PREFIX
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"LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
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p->acpi_id,
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mps_inti_flags_polarity[p->flags.polarity],
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mps_inti_flags_trigger[p->flags.trigger],
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p->lint);
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}
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break;
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case ACPI_MADT_LAPIC_ADDR_OVR:
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{
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struct acpi_table_lapic_addr_ovr *p =
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(struct acpi_table_lapic_addr_ovr *)header;
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printk(KERN_INFO PREFIX
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"LAPIC_ADDR_OVR (address[%p])\n",
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(void *)(unsigned long)p->address);
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}
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break;
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case ACPI_MADT_IOSAPIC:
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{
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struct acpi_table_iosapic *p =
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(struct acpi_table_iosapic *)header;
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printk(KERN_INFO PREFIX
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"IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
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p->id, (void *)(unsigned long)p->address,
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p->global_irq_base);
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}
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break;
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case ACPI_MADT_LSAPIC:
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{
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struct acpi_table_lsapic *p =
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(struct acpi_table_lsapic *)header;
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printk(KERN_INFO PREFIX
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"LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
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p->acpi_id, p->id, p->eid,
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p->flags.enabled ? "enabled" : "disabled");
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}
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break;
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case ACPI_MADT_PLAT_INT_SRC:
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{
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struct acpi_table_plat_int_src *p =
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(struct acpi_table_plat_int_src *)header;
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printk(KERN_INFO PREFIX
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"PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
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mps_inti_flags_polarity[p->flags.polarity],
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mps_inti_flags_trigger[p->flags.trigger],
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p->type, p->id, p->eid, p->iosapic_vector,
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p->global_irq);
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}
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break;
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default:
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printk(KERN_WARNING PREFIX
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"Found unsupported MADT entry (type = 0x%x)\n",
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header->type);
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break;
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}
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}
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int __init
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acpi_table_parse_madt_family(char *id,
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unsigned long madt_size,
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int entry_id,
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acpi_madt_entry_handler handler,
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unsigned int max_entries)
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{
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struct acpi_table_header *madt = NULL;
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acpi_table_entry_header *entry;
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unsigned int count = 0;
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unsigned long madt_end;
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if (!handler)
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return -EINVAL;
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/* Locate the MADT (if exists). There should only be one. */
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acpi_get_table(id, 0, &madt);
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if (!madt) {
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printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
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return -ENODEV;
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}
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madt_end = (unsigned long)madt + madt->length;
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/* Parse all entries looking for a match. */
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entry = (acpi_table_entry_header *)
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((unsigned long)madt + madt_size);
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while (((unsigned long)entry) + sizeof(acpi_table_entry_header) <
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madt_end) {
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if (entry->type == entry_id
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&& (!max_entries || count++ < max_entries))
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if (handler(entry, madt_end))
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return -EINVAL;
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entry = (acpi_table_entry_header *)
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((unsigned long)entry + entry->length);
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}
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if (max_entries && count > max_entries) {
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printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of "
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"%i found\n", id, entry_id, count - max_entries, count);
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}
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return count;
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}
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int __init
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acpi_table_parse_madt(enum acpi_madt_entry_id id,
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acpi_madt_entry_handler handler, unsigned int max_entries)
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{
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return acpi_table_parse_madt_family("APIC",
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sizeof(struct acpi_table_madt), id,
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handler, max_entries);
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}
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int __init acpi_table_parse(char *id, acpi_table_handler handler)
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{
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struct acpi_table_header *table = NULL;
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if (!handler)
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return -EINVAL;
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acpi_get_table(id, 0, &table);
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if (table) {
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handler(table);
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return 1;
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} else
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return 0;
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}
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/*
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* acpi_table_init()
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*
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* find RSDP, find and checksum SDT/XSDT.
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* checksum all tables, print SDT/XSDT
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*
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* result: sdt_entry[] is initialized
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*/
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int __init acpi_table_init(void)
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{
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acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
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return 0;
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}
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