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|
/*
* acpi_tables.c - ACPI Boot-Time Table Parsing
*
* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/bootmem.h>
#define PREFIX "ACPI: "
#define ACPI_MAX_TABLES 128
static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
static int acpi_apic_instance __initdata;
void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
{
if (!header)
return;
switch (header->type) {
case ACPI_MADT_TYPE_LOCAL_APIC:
{
struct acpi_madt_local_apic *p =
(struct acpi_madt_local_apic *)header;
printk(KERN_INFO PREFIX
"LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
p->processor_id, p->id,
(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
}
break;
case ACPI_MADT_TYPE_LOCAL_X2APIC:
{
struct acpi_madt_local_x2apic *p =
(struct acpi_madt_local_x2apic *)header;
printk(KERN_INFO PREFIX
"X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
p->local_apic_id, p->uid,
(p->lapic_flags & ACPI_MADT_ENABLED) ?
"enabled" : "disabled");
}
break;
case ACPI_MADT_TYPE_IO_APIC:
{
struct acpi_madt_io_apic *p =
(struct acpi_madt_io_apic *)header;
printk(KERN_INFO PREFIX
"IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
p->id, p->address, p->global_irq_base);
}
break;
case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
{
struct acpi_madt_interrupt_override *p =
(struct acpi_madt_interrupt_override *)header;
printk(KERN_INFO PREFIX
"INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
p->bus, p->source_irq, p->global_irq,
mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
if (p->inti_flags &
~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
printk(KERN_INFO PREFIX
"INT_SRC_OVR unexpected reserved flags: 0x%x\n",
p->inti_flags &
~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
}
break;
case ACPI_MADT_TYPE_NMI_SOURCE:
{
struct acpi_madt_nmi_source *p =
(struct acpi_madt_nmi_source *)header;
printk(KERN_INFO PREFIX
"NMI_SRC (%s %s global_irq %d)\n",
mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
p->global_irq);
}
break;
case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
{
struct acpi_madt_local_apic_nmi *p =
(struct acpi_madt_local_apic_nmi *)header;
printk(KERN_INFO PREFIX
"LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
p->processor_id,
mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
p->lint);
}
break;
case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
{
u16 polarity, trigger;
struct acpi_madt_local_x2apic_nmi *p =
(struct acpi_madt_local_x2apic_nmi *)header;
polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
printk(KERN_INFO PREFIX
"X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
p->uid,
mps_inti_flags_polarity[polarity],
mps_inti_flags_trigger[trigger],
p->lint);
}
break;
case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
{
struct acpi_madt_local_apic_override *p =
(struct acpi_madt_local_apic_override *)header;
printk(KERN_INFO PREFIX
"LAPIC_ADDR_OVR (address[%p])\n",
(void *)(unsigned long)p->address);
}
break;
case ACPI_MADT_TYPE_IO_SAPIC:
{
struct acpi_madt_io_sapic *p =
(struct acpi_madt_io_sapic *)header;
printk(KERN_INFO PREFIX
"IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
p->id, (void *)(unsigned long)p->address,
p->global_irq_base);
}
break;
case ACPI_MADT_TYPE_LOCAL_SAPIC:
{
struct acpi_madt_local_sapic *p =
(struct acpi_madt_local_sapic *)header;
printk(KERN_INFO PREFIX
"LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
p->processor_id, p->id, p->eid,
(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
}
break;
case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
{
struct acpi_madt_interrupt_source *p =
(struct acpi_madt_interrupt_source *)header;
printk(KERN_INFO PREFIX
"PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
p->type, p->id, p->eid, p->io_sapic_vector,
p->global_irq);
}
break;
default:
printk(KERN_WARNING PREFIX
"Found unsupported MADT entry (type = 0x%x)\n",
header->type);
break;
}
}
int __init
acpi_table_parse_entries(char *id,
unsigned long table_size,
int entry_id,
acpi_tbl_entry_handler handler,
unsigned int max_entries)
{
struct acpi_table_header *table_header = NULL;
struct acpi_subtable_header *entry;
unsigned int count = 0;
unsigned long table_end;
acpi_size tbl_size;
if (acpi_disabled)
return -ENODEV;
if (!handler)
return -EINVAL;
if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
acpi_get_table_with_size(id, acpi_apic_instance, &table_header, &tbl_size);
else
acpi_get_table_with_size(id, 0, &table_header, &tbl_size);
if (!table_header) {
printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
return -ENODEV;
}
table_end = (unsigned long)table_header + table_header->length;
/* Parse all entries looking for a match. */
entry = (struct acpi_subtable_header *)
((unsigned long)table_header + table_size);
while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
table_end) {
if (entry->type == entry_id
&& (!max_entries || count++ < max_entries))
if (handler(entry, table_end))
goto err;
/*
* If entry->length is 0, break from this loop to avoid
* infinite loop.
*/
if (entry->length == 0) {
pr_err(PREFIX "[%4.4s:0x%02x] Invalid zero length\n", id, entry_id);
goto err;
}
entry = (struct acpi_subtable_header *)
((unsigned long)entry + entry->length);
}
if (max_entries && count > max_entries) {
printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of "
"%i found\n", id, entry_id, count - max_entries, count);
}
early_acpi_os_unmap_memory((char *)table_header, tbl_size);
return count;
err:
early_acpi_os_unmap_memory((char *)table_header, tbl_size);
return -EINVAL;
}
int __init
acpi_table_parse_madt(enum acpi_madt_type id,
acpi_tbl_entry_handler handler, unsigned int
|