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alistair23-linux/arch/x86/kernel/acpi/boot.c
Eric W. Biederman a4384df3e2 x86, irq: Rename gsi_end gsi_top, and fix off by one errors 
When I introduced the global variable gsi_end I thought gsi_end on
io_apics was one past the end of the gsi range for the io_apic.  After
it was pointed out the the range on io_apics was inclusive I changed
my global variable to match.  That was a big mistake.  Inclusive
semantics without a range start cannot describe the case when no gsi's
are allocated.  Describing the case where no gsi's are allocated is
important in sfi.c and mpparse.c so that we can assign gsi numbers
instead of blindly copying the gsi assignments the BIOS has done as we
do in the acpi case.

To keep from getting the global variable confused with the gsi range
end rename it gsi_top.

To allow describing the case where no gsi's are allocated have gsi_top
be one place the highest gsi number seen in the system.

This fixes an off by one bug in sfi.c:
Reported-by: jacob pan <jacob.jun.pan@linux.intel.com>

This fixes the same off by one bug in mpparse.c:

This fixes an off unreachable by one bug in acpi/boot.c:irq_to_gsi
Reported-by: Yinghai <yinghai.lu@oracle.com>

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
LKML-Reference: <m17hm9jre7.fsf_-_@fess.ebiederm.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-06-09 13:34:06 -07:00

1697 lines
40 KiB
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/*
* boot.c - Architecture-Specific Low-Level ACPI Boot Support
*
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (C) 2001 Jun Nakajima <jun.nakajima@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/acpi.h>
#include <linux/acpi_pmtmr.h>
#include <linux/efi.h>
#include <linux/cpumask.h>
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/bootmem.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <asm/pci_x86.h>
#include <asm/pgtable.h>
#include <asm/io_apic.h>
#include <asm/apic.h>
#include <asm/io.h>
#include <asm/mpspec.h>
#include <asm/smp.h>
static int __initdata acpi_force = 0;
u32 acpi_rsdt_forced;
int acpi_disabled;
EXPORT_SYMBOL(acpi_disabled);
#ifdef CONFIG_X86_64
# include <asm/proto.h>
# include <asm/numa_64.h>
#endif /* X86 */
#define BAD_MADT_ENTRY(entry, end) ( \
(!entry) || (unsigned long)entry + sizeof(*entry) > end || \
((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
#define PREFIX "ACPI: "
int acpi_noirq; /* skip ACPI IRQ initialization */
int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
EXPORT_SYMBOL(acpi_pci_disabled);
int acpi_lapic;
int acpi_ioapic;
int acpi_strict;
u8 acpi_sci_flags __initdata;
int acpi_sci_override_gsi __initdata;
int acpi_skip_timer_override __initdata;
int acpi_use_timer_override __initdata;
#ifdef CONFIG_X86_LOCAL_APIC
static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
#endif
#ifndef __HAVE_ARCH_CMPXCHG
#warning ACPI uses CMPXCHG, i486 and later hardware
#endif
/* --------------------------------------------------------------------------
Boot-time Configuration
-------------------------------------------------------------------------- */
/*
* The default interrupt routing model is PIC (8259). This gets
* overridden if IOAPICs are enumerated (below).
*/
enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
/*
* ISA irqs by default are the first 16 gsis but can be
* any gsi as specified by an interrupt source override.
*/
static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
};
static unsigned int gsi_to_irq(unsigned int gsi)
{
unsigned int irq = gsi + NR_IRQS_LEGACY;
unsigned int i;
for (i = 0; i < NR_IRQS_LEGACY; i++) {
if (isa_irq_to_gsi[i] == gsi) {
return i;
}
}
/* Provide an identity mapping of gsi == irq
* except on truly weird platforms that have
* non isa irqs in the first 16 gsis.
*/
if (gsi >= NR_IRQS_LEGACY)
irq = gsi;
else
irq = gsi_top + gsi;
return irq;
}
static u32 irq_to_gsi(int irq)
{
unsigned int gsi;
if (irq < NR_IRQS_LEGACY)
gsi = isa_irq_to_gsi[irq];
else if (irq < gsi_top)
gsi = irq;
else if (irq < (gsi_top + NR_IRQS_LEGACY))
gsi = irq - gsi_top;
else
gsi = 0xffffffff;
return gsi;
}
/*
* Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
* to map the target physical address. The problem is that set_fixmap()
* provides a single page, and it is possible that the page is not
* sufficient.
* By using this area, we can map up to MAX_IO_APICS pages temporarily,
* i.e. until the next __va_range() call.
*
* Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
* from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
* count idx down while incrementing the phys address.
*/
char *__init __acpi_map_table(unsigned long phys, unsigned long size)
{
if (!phys || !size)
return NULL;
return early_ioremap(phys, size);
}
void __init __acpi_unmap_table(char *map, unsigned long size)
{
if (!map || !size)
return;
early_iounmap(map, size);
}
#ifdef CONFIG_X86_LOCAL_APIC
static int __init acpi_parse_madt(struct acpi_table_header *table)
{
struct acpi_table_madt *madt = NULL;
if (!cpu_has_apic)
return -EINVAL;
madt = (struct acpi_table_madt *)table;
if (!madt) {
printk(KERN_WARNING PREFIX "Unable to map MADT\n");
return -ENODEV;
}
if (madt->address) {
acpi_lapic_addr = (u64) madt->address;
printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
madt->address);
}
default_acpi_madt_oem_check(madt->header.oem_id,
madt->header.oem_table_id);
return 0;
}
static void __cpuinit acpi_register_lapic(int id, u8 enabled)
{
unsigned int ver = 0;
if (!enabled) {
++disabled_cpus;
return;
}
if (boot_cpu_physical_apicid != -1U)
ver = apic_version[boot_cpu_physical_apicid];
generic_processor_info(id, ver);
}
static int __init
acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
{
struct acpi_madt_local_x2apic *processor = NULL;
processor = (struct acpi_madt_local_x2apic *)header;
if (BAD_MADT_ENTRY(processor, end))
return -EINVAL;
acpi_table_print_madt_entry(header);
#ifdef CONFIG_X86_X2APIC
/*
* We need to register disabled CPU as well to permit
* counting disabled CPUs. This allows us to size
* cpus_possible_map more accurately, to permit
* to not preallocating memory for all NR_CPUS
* when we use CPU hotplug.
*/
acpi_register_lapic(processor->local_apic_id, /* APIC ID */
processor->lapic_flags & ACPI_MADT_ENABLED);
#else
printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
#endif
return 0;
}
static int __init
acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
{
struct acpi_madt_local_apic *processor = NULL;
processor = (struct acpi_madt_local_apic *)header;
if (BAD_MADT_ENTRY(processor, end))
return -EINVAL;
acpi_table_print_madt_entry(header);
/*
* We need to register disabled CPU as well to permit
* counting disabled CPUs. This allows us to size
* cpus_possible_map more accurately, to permit
* to not preallocating memory for all NR_CPUS
* when we use CPU hotplug.
*/
acpi_register_lapic(processor->id, /* APIC ID */
processor->lapic_flags & ACPI_MADT_ENABLED);
return 0;
}
static int __init
acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
{
struct acpi_madt_local_sapic *processor = NULL;
processor = (struct acpi_madt_local_sapic *)header;
if (BAD_MADT_ENTRY(processor, end))
return -EINVAL;
acpi_table_print_madt_entry(header);
acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
processor->lapic_flags & ACPI_MADT_ENABLED);
return 0;
}
static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
const unsigned long end)
{
struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
return -EINVAL;
acpi_lapic_addr = lapic_addr_ovr->address;
return 0;
}
static int __init
acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
const unsigned long end)
{
struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
if (BAD_MADT_ENTRY(x2apic_nmi, end))
return -EINVAL;
acpi_table_print_madt_entry(header);
if (x2apic_nmi->lint != 1)
printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
return 0;
}
static int __init
acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
{
struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
if (BAD_MADT_ENTRY(lapic_nmi, end))
return -EINVAL;
acpi_table_print_madt_entry(header);
if (lapic_nmi->lint != 1)
printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
return 0;
}
#endif /*CONFIG_X86_LOCAL_APIC */
#ifdef CONFIG_X86_IO_APIC
static int __init
acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
{
struct acpi_madt_io_apic *ioapic = NULL;
ioapic = (struct acpi_madt_io_apic *)header;
if (BAD_MADT_ENTRY(ioapic, end))
return -EINVAL;
acpi_table_print_madt_entry(header);
mp_register_ioapic(ioapic->id,
ioapic->address, ioapic->global_irq_base);
return 0;
}
/*
* Parse Interrupt Source Override for the ACPI SCI
*/
static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
{
if (trigger == 0) /* compatible SCI trigger is level */
trigger = 3;
if (polarity == 0) /* compatible SCI polarity is low */
polarity = 3;
/* Command-line over-ride via acpi_sci= */
if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
/*
* mp_config_acpi_legacy_irqs() already setup IRQs < 16
* If GSI is < 16, this will update its flags,
* else it will create a new mp_irqs[] entry.
*/
mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
/*
* stash over-ride to indicate we've been here
* and for later update of acpi_gbl_FADT
*/
acpi_sci_override_gsi = gsi;
return;
}
static int __init
acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
const unsigned long end)
{
struct acpi_madt_interrupt_override *intsrc = NULL;
intsrc = (struct acpi_madt_interrupt_override *)header;
if (BAD_MADT_ENTRY(intsrc, end))
return -EINVAL;
acpi_table_print_madt_entry(header);
if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
acpi_sci_ioapic_setup(intsrc->source_irq,
intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
(intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
intsrc->global_irq);
return 0;
}
if (acpi_skip_timer_override &&
intsrc->source_irq == 0 && intsrc->global_irq == 2) {
printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
return 0;
}
mp_override_legacy_irq(intsrc->source_irq,
intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
(intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
intsrc->global_irq);
return 0;
}
static int __init
acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
{
struct acpi_madt_nmi_source *nmi_src = NULL;
nmi_src = (struct acpi_madt_nmi_source *)header;
if (BAD_MADT_ENTRY(nmi_src, end))
return -EINVAL;
acpi_table_print_madt_entry(header);
/* TBD: Support nimsrc entries? */
return 0;
}
#endif /* CONFIG_X86_IO_APIC */
/*
* acpi_pic_sci_set_trigger()
*
* use ELCR to set PIC-mode trigger type for SCI
*
* If a PIC-mode SCI is not recognized or gives spurious IRQ7's
* it may require Edge Trigger -- use "acpi_sci=edge"
*
* Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
* for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
* ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
* ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
*/
void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
{
unsigned int mask = 1 << irq;
unsigned int old, new;
/* Real old ELCR mask */
old = inb(0x4d0) | (inb(0x4d1) << 8);
/*
* If we use ACPI to set PCI IRQs, then we should clear ELCR
* since we will set it correctly as we enable the PCI irq
* routing.
*/
new = acpi_noirq ? old : 0;
/*
* Update SCI information in the ELCR, it isn't in the PCI
* routing tables..
*/
switch (trigger) {
case 1: /* Edge - clear */
new &= ~mask;
break;
case 3: /* Level - set */
new |= mask;
break;
}
if (old == new)
return;
printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
outb(new, 0x4d0);
outb(new >> 8, 0x4d1);
}
int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
{
*irq = gsi_to_irq(gsi);
#ifdef CONFIG_X86_IO_APIC
if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
setup_IO_APIC_irq_extra(gsi);
#endif
return 0;
}
int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
{
if (isa_irq >= 16)
return -1;
*gsi = irq_to_gsi(isa_irq);
return 0;
}
/*
* success: return IRQ number (>=0)
* failure: return < 0
*/
int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
{
unsigned int irq;
unsigned int plat_gsi = gsi;
#ifdef CONFIG_PCI
/*
* Make sure all (legacy) PCI IRQs are set as level-triggered.
*/
if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
if (trigger == ACPI_LEVEL_SENSITIVE)
eisa_set_level_irq(gsi);
}
#endif
#ifdef CONFIG_X86_IO_APIC
if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
}
#endif
irq = gsi_to_irq(plat_gsi);
return irq;
}
/*
* ACPI based hotplug support for CPU
*/
#ifdef CONFIG_ACPI_HOTPLUG_CPU
#include <acpi/processor.h>
static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
{
#ifdef CONFIG_ACPI_NUMA
int nid;
nid = acpi_get_node(handle);
if (nid == -1 || !node_online(nid))
return;
#ifdef CONFIG_X86_64
apicid_to_node[physid] = nid;
numa_set_node(cpu, nid);
#else /* CONFIG_X86_32 */
apicid_2_node[physid] = nid;
cpu_to_node_map[cpu] = nid;
#endif
#endif
}
static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
struct acpi_madt_local_apic *lapic;
cpumask_var_t tmp_map, new_map;
u8 physid;
int cpu;
int retval = -ENOMEM;
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
return -EINVAL;
if (!buffer.length || !buffer.pointer)
return -EINVAL;
obj = buffer.pointer;
if (obj->type != ACPI_TYPE_BUFFER ||
obj->buffer.length < sizeof(*lapic)) {
kfree(buffer.pointer);
return -EINVAL;
}
lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
!(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
kfree(buffer.pointer);
return -EINVAL;
}
physid = lapic->id;
kfree(buffer.pointer);
buffer.length = ACPI_ALLOCATE_BUFFER;
buffer.pointer = NULL;
if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
goto out;
if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
goto free_tmp_map;
cpumask_copy(tmp_map, cpu_present_mask);
acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
/*
* If mp_register_lapic successfully generates a new logical cpu
* number, then the following will get us exactly what was mapped
*/
cpumask_andnot(new_map, cpu_present_mask, tmp_map);
if (cpumask_empty(new_map)) {
printk ("Unable to map lapic to logical cpu number\n");
retval = -EINVAL;
goto free_new_map;
}
acpi_processor_set_pdc(handle);
cpu = cpumask_first(new_map);
acpi_map_cpu2node(handle, cpu, physid);
*pcpu = cpu;
retval = 0;
free_new_map:
free_cpumask_var(new_map);
free_tmp_map:
free_cpumask_var(tmp_map);
out:
return retval;
}
/* wrapper to silence section mismatch warning */
int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
{
return _acpi_map_lsapic(handle, pcpu);
}
EXPORT_SYMBOL(acpi_map_lsapic);
int acpi_unmap_lsapic(int cpu)
{
per_cpu(x86_cpu_to_apicid, cpu) = -1;
set_cpu_present(cpu, false);
num_processors--;
return (0);
}
EXPORT_SYMBOL(acpi_unmap_lsapic);
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
{
/* TBD */
return -EINVAL;
}
EXPORT_SYMBOL(acpi_register_ioapic);
int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
{
/* TBD */
return -EINVAL;
}
EXPORT_SYMBOL(acpi_unregister_ioapic);
static int __init acpi_parse_sbf(struct acpi_table_header *table)
{
struct acpi_table_boot *sb;
sb = (struct acpi_table_boot *)table;
if (!sb) {
printk(KERN_WARNING PREFIX "Unable to map SBF\n");
return -ENODEV;
}
sbf_port = sb->cmos_index; /* Save CMOS port */
return 0;
}
#ifdef CONFIG_HPET_TIMER
#include <asm/hpet.h>
static struct __initdata resource *hpet_res;
static int __init acpi_parse_hpet(struct acpi_table_header *table)
{
struct acpi_table_hpet *hpet_tbl;
hpet_tbl = (struct acpi_table_hpet *)table;
if (!hpet_tbl) {
printk(KERN_WARNING PREFIX "Unable to map HPET\n");
return -ENODEV;
}
if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
printk(KERN_WARNING PREFIX "HPET timers must be located in "
"memory.\n");
return -1;
}
hpet_address = hpet_tbl->address.address;
hpet_blockid = hpet_tbl->sequence;
/*
* Some broken BIOSes advertise HPET at 0x0. We really do not
* want to allocate a resource there.
*/
if (!hpet_address) {
printk(KERN_WARNING PREFIX
"HPET id: %#x base: %#lx is invalid\n",
hpet_tbl->id, hpet_address);
return 0;
}
#ifdef CONFIG_X86_64
/*
* Some even more broken BIOSes advertise HPET at
* 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
* some noise:
*/
if (hpet_address == 0xfed0000000000000UL) {
if (!hpet_force_user) {
printk(KERN_WARNING PREFIX "HPET id: %#x "
"base: 0xfed0000000000000 is bogus\n "
"try hpet=force on the kernel command line to "
"fix it up to 0xfed00000.\n", hpet_tbl->id);
hpet_address = 0;
return 0;
}
printk(KERN_WARNING PREFIX
"HPET id: %#x base: 0xfed0000000000000 fixed up "
"to 0xfed00000.\n", hpet_tbl->id);
hpet_address >>= 32;
}
#endif
printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
hpet_tbl->id, hpet_address);
/*
* Allocate and initialize the HPET firmware resource for adding into
* the resource tree during the lateinit timeframe.
*/
#define HPET_RESOURCE_NAME_SIZE 9
hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
hpet_res->name = (void *)&hpet_res[1];
hpet_res->flags = IORESOURCE_MEM;
snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
hpet_tbl->sequence);
hpet_res->start = hpet_address;
hpet_res->end = hpet_address + (1 * 1024) - 1;
return 0;
}
/*
* hpet_insert_resource inserts the HPET resources used into the resource
* tree.
*/
static __init int hpet_insert_resource(void)
{
if (!hpet_res)
return 1;
return insert_resource(&iomem_resource, hpet_res);
}
late_initcall(hpet_insert_resource);
#else
#define acpi_parse_hpet NULL
#endif
static int __init acpi_parse_fadt(struct acpi_table_header *table)
{
#ifdef CONFIG_X86_PM_TIMER
/* detect the location of the ACPI PM Timer */
if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
/* FADT rev. 2 */
if (acpi_gbl_FADT.xpm_timer_block.space_id !=
ACPI_ADR_SPACE_SYSTEM_IO)
return 0;
pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
/*
* "X" fields are optional extensions to the original V1.0
* fields, so we must selectively expand V1.0 fields if the
* corresponding X field is zero.
*/
if (!pmtmr_ioport)
pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
} else {
/* FADT rev. 1 */
pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
}
if (pmtmr_ioport)
printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
pmtmr_ioport);
#endif
return 0;
}
#ifdef CONFIG_X86_LOCAL_APIC
/*
* Parse LAPIC entries in MADT
* returns 0 on success, < 0 on error
*/
static void __init acpi_register_lapic_address(unsigned long address)
{
mp_lapic_addr = address;
set_fixmap_nocache(FIX_APIC_BASE, address);
if (boot_cpu_physical_apicid == -1U) {
boot_cpu_physical_apicid = read_apic_id();
apic_version[boot_cpu_physical_apicid] =
GET_APIC_VERSION(apic_read(APIC_LVR));
}
}
static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
{
int count;
if (!cpu_has_apic)
return -ENODEV;
/*
* Note that the LAPIC address is obtained from the MADT (32-bit value)
* and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
*/
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
acpi_parse_lapic_addr_ovr, 0);
if (count < 0) {
printk(KERN_ERR PREFIX
"Error parsing LAPIC address override entry\n");
return count;
}
acpi_register_lapic_address(acpi_lapic_addr);
return count;
}
static int __init acpi_parse_madt_lapic_entries(void)
{
int count;
int x2count = 0;
if (!cpu_has_apic)
return -ENODEV;
/*
* Note that the LAPIC address is obtained from the MADT (32-bit value)
* and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
*/
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
acpi_parse_lapic_addr_ovr, 0);
if (count < 0) {
printk(KERN_ERR PREFIX
"Error parsing LAPIC address override entry\n");
return count;
}
acpi_register_lapic_address(acpi_lapic_addr);
count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
acpi_parse_sapic, MAX_APICS);
if (!count) {
x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
acpi_parse_x2apic, MAX_APICS);
count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
acpi_parse_lapic, MAX_APICS);
}
if (!count && !x2count) {
printk(KERN_ERR PREFIX "No LAPIC entries present\n");
/* TBD: Cleanup to allow fallback to MPS */
return -ENODEV;
} else if (count < 0 || x2count < 0) {
printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return count;
}
x2count =
acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
acpi_parse_x2apic_nmi, 0);
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
if (count < 0 || x2count < 0) {
printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return count;
}
return 0;
}
#endif /* CONFIG_X86_LOCAL_APIC */
#ifdef CONFIG_X86_IO_APIC
#define MP_ISA_BUS 0
#ifdef CONFIG_X86_ES7000
extern int es7000_plat;
#endif
static void assign_to_mp_irq(struct mpc_intsrc *m,
struct mpc_intsrc *mp_irq)
{
memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
}
static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
struct mpc_intsrc *m)
{
return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
}
static void save_mp_irq(struct mpc_intsrc *m)
{
int i;
for (i = 0; i < mp_irq_entries; i++) {
if (!mp_irq_cmp(&mp_irqs[i], m))
return;
}
assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
if (++mp_irq_entries == MAX_IRQ_SOURCES)
panic("Max # of irq sources exceeded!!\n");
}
void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
{
int ioapic;
int pin;
struct mpc_intsrc mp_irq;
/*
* Convert 'gsi' to 'ioapic.pin'.
*/
ioapic = mp_find_ioapic(gsi);
if (ioapic < 0)
return;
pin = mp_find_ioapic_pin(ioapic, gsi);
/*
* TBD: This check is for faulty timer entries, where the override
* erroneously sets the trigger to level, resulting in a HUGE
* increase of timer interrupts!
*/
if ((bus_irq == 0) && (trigger == 3))
trigger = 1;
mp_irq.type = MP_INTSRC;
mp_irq.irqtype = mp_INT;
mp_irq.irqflag = (trigger << 2) | polarity;
mp_irq.srcbus = MP_ISA_BUS;
mp_irq.srcbusirq = bus_irq; /* IRQ */
mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
mp_irq.dstirq = pin; /* INTIN# */
save_mp_irq(&mp_irq);
isa_irq_to_gsi[bus_irq] = gsi;
}
void __init mp_config_acpi_legacy_irqs(void)
{
int i;
struct mpc_intsrc mp_irq;
#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
/*
* Fabricate the legacy ISA bus (bus #31).
*/
mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
#endif
set_bit(MP_ISA_BUS, mp_bus_not_pci);
pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
#ifdef CONFIG_X86_ES7000
/*
* Older generations of ES7000 have no legacy identity mappings
*/
if (es7000_plat == 1)
return;
#endif
/*
* Use the default configuration for the IRQs 0-15. Unless
* overridden by (MADT) interrupt source override entries.
*/
for (i = 0; i < 16; i++) {
int ioapic, pin;
unsigned int dstapic;
int idx;
u32 gsi;
/* Locate the gsi that irq i maps to. */
if (acpi_isa_irq_to_gsi(i, &gsi))
continue;
/*
* Locate the IOAPIC that manages the ISA IRQ.
*/
ioapic = mp_find_ioapic(gsi);
if (ioapic < 0)
continue;
pin = mp_find_ioapic_pin(ioapic, gsi);
dstapic = mp_ioapics[ioapic].apicid;
for (idx = 0; idx < mp_irq_entries; idx++) {
struct mpc_intsrc *irq = mp_irqs + idx;
/* Do we already have a mapping for this ISA IRQ? */
if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
break;
/* Do we already have a mapping for this IOAPIC pin */
if (irq->dstapic == dstapic && irq->dstirq == pin)
break;
}
if (idx != mp_irq_entries) {
printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
continue; /* IRQ already used */
}
mp_irq.type = MP_INTSRC;
mp_irq.irqflag = 0; /* Conforming */
mp_irq.srcbus = MP_ISA_BUS;
mp_irq.dstapic = dstapic;
mp_irq.irqtype = mp_INT;
mp_irq.srcbusirq = i; /* Identity mapped */
mp_irq.dstirq = pin;
save_mp_irq(&mp_irq);
}
}
static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
int polarity)
{
#ifdef CONFIG_X86_MPPARSE
struct mpc_intsrc mp_irq;
struct pci_dev *pdev;
unsigned char number;
unsigned int devfn;
int ioapic;
u8 pin;
if (!acpi_ioapic)
return 0;
if (!dev)
return 0;
if (dev->bus != &pci_bus_type)
return 0;
pdev = to_pci_dev(dev);
number = pdev->bus->number;
devfn = pdev->devfn;
pin = pdev->pin;
/* print the entry should happen on mptable identically */
mp_irq.type = MP_INTSRC;
mp_irq.irqtype = mp_INT;
mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
(polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
mp_irq.srcbus = number;
mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
ioapic = mp_find_ioapic(gsi);
mp_irq.dstapic = mp_ioapics[ioapic].apicid;
mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
save_mp_irq(&mp_irq);
#endif
return 0;
}
int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
{
int ioapic;
int ioapic_pin;
struct io_apic_irq_attr irq_attr;
if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
return gsi;
/* Don't set up the ACPI SCI because it's already set up */
if (acpi_gbl_FADT.sci_interrupt == gsi)
return gsi;
ioapic = mp_find_ioapic(gsi);
if (ioapic < 0) {
printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
return gsi;
}
ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
printk(KERN_ERR "Invalid reference to IOAPIC pin "
"%d-%d\n", mp_ioapics[ioapic].apicid,
ioapic_pin);
return gsi;
}
if (enable_update_mptable)
mp_config_acpi_gsi(dev, gsi, trigger, polarity);
set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
return gsi;
}
/*
* Parse IOAPIC related entries in MADT
* returns 0 on success, < 0 on error
*/
static int __init acpi_parse_madt_ioapic_entries(void)
{
int count;
/*
* ACPI interpreter is required to complete interrupt setup,
* so if it is off, don't enumerate the io-apics with ACPI.
* If MPS is present, it will handle them,
* otherwise the system will stay in PIC mode
*/
if (acpi_disabled || acpi_noirq)
return -ENODEV;
if (!cpu_has_apic)
return -ENODEV;
/*
* if "noapic" boot option, don't look for IO-APICs
*/
if (skip_ioapic_setup) {
printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
"due to 'noapic' option.\n");
return -ENODEV;
}
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
MAX_IO_APICS);
if (!count) {
printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
return -ENODEV;
} else if (count < 0) {
printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
return count;
}
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
nr_irqs);
if (count < 0) {
printk(KERN_ERR PREFIX
"Error parsing interrupt source overrides entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return count;
}
/*
* If BIOS did not supply an INT_SRC_OVR for the SCI
* pretend we got one so we can set the SCI flags.
*/
if (!acpi_sci_override_gsi)
acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
acpi_gbl_FADT.sci_interrupt);
/* Fill in identity legacy mappings where no override */
mp_config_acpi_legacy_irqs();
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
nr_irqs);
if (count < 0) {
printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return count;
}
return 0;
}
#else
static inline int acpi_parse_madt_ioapic_entries(void)
{
return -1;
}
#endif /* !CONFIG_X86_IO_APIC */
static void __init early_acpi_process_madt(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
int error;
if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
/*
* Parse MADT LAPIC entries
*/
error = early_acpi_parse_madt_lapic_addr_ovr();
if (!error) {
acpi_lapic = 1;
smp_found_config = 1;
}
if (error == -EINVAL) {
/*
* Dell Precision Workstation 410, 610 come here.
*/
printk(KERN_ERR PREFIX
"Invalid BIOS MADT, disabling ACPI\n");
disable_acpi();
}
}
#endif
}
static void __init acpi_process_madt(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
int error;
if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
/*
* Parse MADT LAPIC entries
*/
error = acpi_parse_madt_lapic_entries();
if (!error) {
acpi_lapic = 1;
/*
* Parse MADT IO-APIC entries
*/
error = acpi_parse_madt_ioapic_entries();
if (!error) {
acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
acpi_ioapic = 1;
smp_found_config = 1;
}
}
if (error == -EINVAL) {
/*
* Dell Precision Workstation 410, 610 come here.
*/
printk(KERN_ERR PREFIX
"Invalid BIOS MADT, disabling ACPI\n");
disable_acpi();
}
} else {
/*
* ACPI found no MADT, and so ACPI wants UP PIC mode.
* In the event an MPS table was found, forget it.
* Boot with "acpi=off" to use MPS on such a system.
*/
if (smp_found_config) {
printk(KERN_WARNING PREFIX
"No APIC-table, disabling MPS\n");
smp_found_config = 0;
}
}
/*
* ACPI supports both logical (e.g. Hyper-Threading) and physical
* processors, where MPS only supports physical.
*/
if (acpi_lapic && acpi_ioapic)
printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
"information\n");
else if (acpi_lapic)
printk(KERN_INFO "Using ACPI for processor (LAPIC) "
"configuration information\n");
#endif
return;
}
static int __init disable_acpi_irq(const struct dmi_system_id *d)
{
if (!acpi_force) {
printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
d->ident);
acpi_noirq_set();
}
return 0;
}
static int __init disable_acpi_pci(const struct dmi_system_id *d)
{
if (!acpi_force) {
printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
d->ident);
acpi_disable_pci();
}
return 0;
}
static int __init dmi_disable_acpi(const struct dmi_system_id *d)
{
if (!acpi_force) {
printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
disable_acpi();
} else {
printk(KERN_NOTICE
"Warning: DMI blacklist says broken, but acpi forced\n");
}
return 0;
}
/*
* Force ignoring BIOS IRQ0 pin2 override
*/
static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
{
/*
* The ati_ixp4x0_rev() early PCI quirk should have set
* the acpi_skip_timer_override flag already:
*/
if (!acpi_skip_timer_override) {
WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
d->ident);
acpi_skip_timer_override = 1;
}
return 0;
}
/*
* If your system is blacklisted here, but you find that acpi=force
* works for you, please contact linux-acpi@vger.kernel.org
*/
static struct dmi_system_id __initdata acpi_dmi_table[] = {
/*
* Boxes that need ACPI disabled
*/
{
.callback = dmi_disable_acpi,
.ident = "IBM Thinkpad",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
},
},
/*
* Boxes that need ACPI PCI IRQ routing disabled
*/
{
.callback = disable_acpi_irq,
.ident = "ASUS A7V",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
/* newer BIOS, Revision 1011, does work */
DMI_MATCH(DMI_BIOS_VERSION,
"ASUS A7V ACPI BIOS Revision 1007"),
},
},
{
/*
* Latest BIOS for IBM 600E (1.16) has bad pcinum
* for LPC bridge, which is needed for the PCI
* interrupt links to work. DSDT fix is in bug 5966.
* 2645, 2646 model numbers are shared with 600/600E/600X
*/
.callback = disable_acpi_irq,
.ident = "IBM Thinkpad 600 Series 2645",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
DMI_MATCH(DMI_BOARD_NAME, "2645"),
},
},
{
.callback = disable_acpi_irq,
.ident = "IBM Thinkpad 600 Series 2646",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
DMI_MATCH(DMI_BOARD_NAME, "2646"),
},
},
/*
* Boxes that need ACPI PCI IRQ routing and PCI scan disabled
*/
{ /* _BBN 0 bug */
.callback = disable_acpi_pci,
.ident = "ASUS PR-DLS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
DMI_MATCH(DMI_BIOS_VERSION,
"ASUS PR-DLS ACPI BIOS Revision 1010"),
DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
},
},
{
.callback = disable_acpi_pci,
.ident = "Acer TravelMate 36x Laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
},
},
{}
};
/* second table for DMI checks that should run after early-quirks */
static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
/*
* HP laptops which use a DSDT reporting as HP/SB400/10000,
* which includes some code which overrides all temperature
* trip points to 16C if the INTIN2 input of the I/O APIC
* is enabled. This input is incorrectly designated the
* ISA IRQ 0 via an interrupt source override even though
* it is wired to the output of the master 8259A and INTIN0
* is not connected at all. Force ignoring BIOS IRQ0 pin2
* override in that cases.
*/
{
.callback = dmi_ignore_irq0_timer_override,
.ident = "HP nx6115 laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
},
},
{
.callback = dmi_ignore_irq0_timer_override,
.ident = "HP NX6125 laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
},
},
{
.callback = dmi_ignore_irq0_timer_override,
.ident = "HP NX6325 laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
},
},
{
.callback = dmi_ignore_irq0_timer_override,
.ident = "HP 6715b laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
},
},
{}
};
/*
* acpi_boot_table_init() and acpi_boot_init()
* called from setup_arch(), always.
* 1. checksums all tables
* 2. enumerates lapics
* 3. enumerates io-apics
*
* acpi_table_init() is separate to allow reading SRAT without
* other side effects.
*
* side effects of acpi_boot_init:
* acpi_lapic = 1 if LAPIC found
* acpi_ioapic = 1 if IOAPIC found
* if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
* if acpi_blacklisted() acpi_disabled = 1;
* acpi_irq_model=...
* ...
*/
void __init acpi_boot_table_init(void)
{
dmi_check_system(acpi_dmi_table);
/*
* If acpi_disabled, bail out
*/
if (acpi_disabled)
return;
/*
* Initialize the ACPI boot-time table parser.
*/
if (acpi_table_init()) {
disable_acpi();
return;
}
acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
/*
* blacklist may disable ACPI entirely
*/
if (acpi_blacklisted()) {
if (acpi_force) {
printk(KERN_WARNING PREFIX "acpi=force override\n");
} else {
printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
disable_acpi();
return;
}
}
}
int __init early_acpi_boot_init(void)
{
/*
* If acpi_disabled, bail out
*/
if (acpi_disabled)
return 1;
/*
* Process the Multiple APIC Description Table (MADT), if present
*/
early_acpi_process_madt();
return 0;
}
int __init acpi_boot_init(void)
{
/* those are executed after early-quirks are executed */
dmi_check_system(acpi_dmi_table_late);
/*
* If acpi_disabled, bail out
*/
if (acpi_disabled)
return 1;
acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
/*
* set sci_int and PM timer address
*/
acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
/*
* Process the Multiple APIC Description Table (MADT), if present
*/
acpi_process_madt();
acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
if (!acpi_noirq)
x86_init.pci.init = pci_acpi_init;
return 0;
}
static int __init parse_acpi(char *arg)
{
if (!arg)
return -EINVAL;
/* "acpi=off" disables both ACPI table parsing and interpreter */
if (strcmp(arg, "off") == 0) {
disable_acpi();
}
/* acpi=force to over-ride black-list */
else if (strcmp(arg, "force") == 0) {
acpi_force = 1;
acpi_disabled = 0;
}
/* acpi=strict disables out-of-spec workarounds */
else if (strcmp(arg, "strict") == 0) {
acpi_strict = 1;
}
/* acpi=rsdt use RSDT instead of XSDT */
else if (strcmp(arg, "rsdt") == 0) {
acpi_rsdt_forced = 1;
}
/* "acpi=noirq" disables ACPI interrupt routing */
else if (strcmp(arg, "noirq") == 0) {
acpi_noirq_set();
}
/* "acpi=copy_dsdt" copys DSDT */
else if (strcmp(arg, "copy_dsdt") == 0) {
acpi_gbl_copy_dsdt_locally = 1;
} else {
/* Core will printk when we return error. */
return -EINVAL;
}
return 0;
}
early_param("acpi", parse_acpi);
/* FIXME: Using pci= for an ACPI parameter is a travesty. */
static int __init parse_pci(char *arg)
{
if (arg && strcmp(arg, "noacpi") == 0)
acpi_disable_pci();
return 0;
}
early_param("pci", parse_pci);
int __init acpi_mps_check(void)
{
#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
/* mptable code is not built-in*/
if (acpi_disabled || acpi_noirq) {
printk(KERN_WARNING "MPS support code is not built-in.\n"
"Using acpi=off or acpi=noirq or pci=noacpi "
"may have problem\n");
return 1;
}
#endif
return 0;
}
#ifdef CONFIG_X86_IO_APIC
static int __init parse_acpi_skip_timer_override(char *arg)
{
acpi_skip_timer_override = 1;
return 0;
}
early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
static int __init parse_acpi_use_timer_override(char *arg)
{
acpi_use_timer_override = 1;
return 0;
}
early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
#endif /* CONFIG_X86_IO_APIC */
static int __init setup_acpi_sci(char *s)
{
if (!s)
return -EINVAL;
if (!strcmp(s, "edge"))
acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
(acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
else if (!strcmp(s, "level"))
acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
(acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
else if (!strcmp(s, "high"))
acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
(acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
else if (!strcmp(s, "low"))
acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
(acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
else
return -EINVAL;
return 0;
}
early_param("acpi_sci", setup_acpi_sci);
int __acpi_acquire_global_lock(unsigned int *lock)
{
unsigned int old, new, val;
do {
old = *lock;
new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
val = cmpxchg(lock, old, new);
} while (unlikely (val != old));
return (new < 3) ? -1 : 0;
}
int __acpi_release_global_lock(unsigned int *lock)
{
unsigned int old, new, val;
do {
old = *lock;
new = old & ~0x3;
val = cmpxchg(lock, old, new);
} while (unlikely (val != old));
return old & 0x1;
}
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