/*
* 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/config.h>
#include <linux/acpi.h>
#include <linux/efi.h>
#include <linux/irq.h>
#include <asm/pgalloc.h>
#include <asm/io_apic.h>
#include <asm/apic.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mpspec.h>
#ifdef CONFIG_X86_LOCAL_APIC
#include <mach_apic.h>
#include <mach_mpparse.h>
#include <asm/io_apic.h>
#endif
#define PREFIX "ACPI: "
int acpi_noirq __initdata; /* skip ACPI IRQ initialization */
int acpi_ht __initdata = 1; /* enable HT */
int acpi_lapic;
int acpi_ioapic;
int acpi_strict;
#ifdef CONFIG_X86_LOCAL_APIC
static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
#endif
/* --------------------------------------------------------------------------
Boot-time Configuration
-------------------------------------------------------------------------- */
/*
* The default interrupt routing model is PIC (8259). This gets
* overriden if IOAPICs are enumerated (below).
*/
enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
/*
* 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 *__acpi_map_table(unsigned long phys, unsigned long size)
{
unsigned long base, offset, mapped_size;
int idx;
if (phys + size < 8*1024*1024)
return __va(phys);
offset = phys & (PAGE_SIZE - 1);
mapped_size = PAGE_SIZE - offset;
set_fixmap(FIX_ACPI_END, phys);
base = fix_to_virt(FIX_ACPI_END);
/*
* Most cases can be covered by the below.
*/
idx = FIX_ACPI_END;
while (mapped_size < size) {
if (--idx < FIX_ACPI_BEGIN)
return 0; /* cannot handle this */
phys += PAGE_SIZE;
set_fixmap(idx, phys);
mapped_size += PAGE_SIZE;
}
return ((unsigned char *) base + offset);
}
#ifdef CONFIG_PCI_MMCONFIG
static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
{
struct acpi_table_mcfg *mcfg;
if (!phys_addr || !size)
return -EINVAL;
mcfg = (struct acpi_table_mcfg *) __acpi_map_table(phys_addr, size);
if (!mcfg) {
printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
return -ENODEV;
}
if (mcfg->base_reserved) {
printk(KERN_ERR PREFIX "MMCONFIG not in low 4GB of memory\n");
return -ENODEV;
}
pci_mmcfg_base_addr = mcfg->base_address;
return 0;
}
#endif /* CONFIG_PCI_MMCONFIG */
#ifdef CONFIG_X86_LOCAL_APIC
static int __init
acpi_parse_madt (
unsigned long phys_addr,
unsigned long size)
{
struct acpi_table_madt *madt = NULL;
if (!phys_addr || !size)
return -EINVAL;
madt = (struct acpi_table_madt *) __acpi_map_table(phys_addr, size);
if (!madt) {
printk(KERN_WARNING PREFIX "Unable to map MADT\n");
return -ENODEV;
}
if (madt->lapic_address) {
acpi_lapic_addr = (u64) madt->lapic_address;
printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
madt->lapic_address);
}
acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
return 0;
}
static int __init
acpi_parse_lapic (
acpi_table_entry_header *header)
{
struct acpi_table_lapic *processor = NULL;
processor = (struct acpi_table_lapic*) header;
if (!processor)
return -EINVAL;
acpi_table_print_madt_entry(header);
/* no utility in registering a disabled processor */
if (processor->flags.enabled == 0)
return 0;
mp_register_lapic (
processor->id, /* APIC ID */
processor->flags.enabled); /* Enabled? */
return 0;
}
static int __init
acpi_parse_lapic_addr_ovr (
acpi_table_entry_header *header)
{
struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr*) header;
if (!lapic_addr_ovr)
return -EINVAL;
acpi_lapic_addr = lapic_addr_ovr->address;
return 0;
}
static int __init
acpi_parse_lapic_nmi (
acpi_table_entry_header *header)
{
struct acpi_table_lapic_nmi *lapic_nmi = NULL;
lapic_nmi = (struct acpi_table_lapic_nmi*) header;
if (!lapic_nmi)
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*/
#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
static int __init
acpi_parse_ioapic (
acpi_table_entry_header *header)
{
struct acpi_table_ioapic *ioapic = NULL;
ioapic = (struct acpi_table_ioapic*) header;
if (!ioapic)
return -EINVAL;
acpi_table_print_madt_entry(header);
mp_register_ioapic (
ioapic->id,
ioapic->address,
ioapic->global_irq_base);
return 0;
}
static int __init
acpi_parse_int_src_ovr (
acpi_table_entry_header *header)
{
struct acpi_table_int_src_ovr *intsrc = NULL;
intsrc = (struct acpi_table_int_src_ovr*) header;
if (!intsrc)
return -EINVAL;
acpi_table_print_madt_entry(header);
mp_override_legacy_irq (
intsrc->bus_irq,
intsrc->flags.polarity,
intsrc->flags.trigger,
intsrc->global_irq);
return 0;
}
static int __init
acpi_parse_nmi_src (
acpi_table_entry_header *header)
{
struct acpi_table_nmi_src *nmi_src = NULL;
nmi_src = (struct acpi_table_nmi_src*) header;
if (!nmi_src)
return -EINVAL;
acpi_table_print_madt_entry(header);
/* TBD: Support nimsrc entries? */
return 0;
}
#endif /* CONFIG_X86_IO_APIC */
#ifdef CONFIG_ACPI_BUS
/*
* "acpi_pic_sci=level" (current default)
* programs the PIC-mode SCI to Level Trigger.
* (NO-OP if the BIOS set Level Trigger already)
*
* If a PIC-mode SCI is not recognized or gives spurious IRQ7's
* it may require Edge Trigger -- use "acpi_pic_sci=edge"
* (NO-OP if the BIOS set Edge Trigger already)
*
* 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 IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
* ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
*/
static int __initdata acpi_pic_sci_trigger; /* 0: level, 1: edge */
void __init
acpi_pic_sci_set_trigger(unsigned int irq)
{
unsigned char mask = 1 << (irq & 7);
unsigned int port = 0x4d0 + (irq >> 3);
unsigned char val = inb(port);
printk(PREFIX "IRQ%d SCI:", irq);
if (!(val & mask)) {
printk(" Edge");
if (!acpi_pic_sci_trigger) {
printk(" set to Level");
outb(val | mask, port);
}
} else {
printk(" Level");
if (acpi_pic_sci_trigger) {
printk(" set to Edge");
outb(val | mask, port);
}
}
printk(" Trigger.\n");
}
int __init
acpi_pic_sci_setup(char *str)
{
while (str && *str) {
if (strncmp(str, "level", 5) == 0)
acpi_pic_sci_trigger = 0; /* force level trigger */
if (strncmp(str, "edge", 4) == 0)
acpi_pic_sci_trigger = 1; /* force edge trigger */
str = strchr(str, ',');
if (str)
str += strspn(str, ", \t");
}
return 1;
}
__setup("acpi_pic_sci=", acpi_pic_sci_setup);
#endif /* CONFIG_ACPI_BUS */
#ifdef CONFIG_X86_IO_APIC
int acpi_irq_to_vector(u32 irq)
{
if (use_pci_vector() && !platform_legacy_irq(irq))
irq = IO_APIC_VECTOR(irq);
return irq;
}
#endif
static unsigned long __init
acpi_scan_rsdp (
unsigned long start,
unsigned long length)
{
unsigned long offset = 0;
unsigned long sig_len = sizeof("RSD PTR ") - 1;
/*
* Scan all 16-byte boundaries of the physical memory region for the
* RSDP signature.
*/
for (offset = 0; offset < length; offset += 16) {
if (strncmp((char *) (start + offset), "RSD PTR ", sig_len))
continue;
return (start + offset);
}
return 0;
}
static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
{
struct acpi_table_sbf *sb;
if (!phys_addr || !size)
return -EINVAL;
sb = (struct acpi_table_sbf *) __acpi_map_table(phys_addr, size);
if (!sb) {
printk(KERN_WARNING PREFIX "Unable to map SBF\n");
return -ENODEV;
}
sbf_port = sb->sbf_cmos; /* Save CMOS port */
return 0;
}
#ifdef CONFIG_HPET_TIMER
extern unsigned long hpet_address;
static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
{
struct acpi_table_hpet *hpet_tbl;
if (!phys || !size)
return -EINVAL;
hpet_tbl = (struct acpi_table_hpet *) __acpi_map_table(phys, size);
if (!hpet_tbl) {
printk(KERN_WARNING PREFIX "Unable to map HPET\n");
return -ENODEV;
}
if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
printk(KERN_WARNING PREFIX "HPET timers must be located in "
"memory.\n");
return -1;
}
hpet_address = hpet_tbl->addr.addrl;
printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", hpet_tbl->id,
hpet_address);
return 0;
}
#endif
/* detect the location of the ACPI PM Timer */
#ifdef CONFIG_X86_PM_TIMER
extern u32 pmtmr_ioport;
static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
{
struct fadt_descriptor_rev2 *fadt =0;
fadt = (struct fadt_descriptor_rev2*) __acpi_map_table(phys,size);
if(!fadt) {
printk(KERN_WARNING PREFIX "Unable to map FADT\n");
return 0;
}
if (fadt->revision >= FADT2_REVISION_ID) {
/* FADT rev. 2 */
if (fadt->xpm_tmr_blk.address_space_id != ACPI_ADR_SPACE_SYSTEM_IO)
return 0;
pmtmr_ioport = fadt->xpm_tmr_blk.address;
} else {
/* FADT rev. 1 */
pmtmr_ioport = fadt->V1_pm_tmr_blk;
}
if (pmtmr_ioport)
printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", pmtmr_ioport);
return 0;
}
#endif
unsigned long __init
acpi_find_rsdp (void)
{
unsigned long rsdp_phys = 0;
if (efi_enabled) {
if (efi.acpi20)
return __pa(efi.acpi20);
else if (efi.acpi)
return __pa(efi.acpi);
}
/*
* Scan memory looking for the RSDP signature. First search EBDA (low
* memory) paragraphs and then search upper memory (E0000-FFFFF).
*/
rsdp_phys = acpi_scan_rsdp (0, 0x400);
if (!rsdp_phys)
rsdp_phys = acpi_scan_rsdp (0xE0000, 0xFFFFF);
return rsdp_phys;
}
#ifdef CONFIG_X86_LOCAL_APIC
/*
* Parse LAPIC entries in MADT
* returns 0 on success, < 0 on error
*/
static int __init
acpi_parse_madt_lapic_entries(void)
{
int count;
/*
* 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_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0);
if (count < 0) {
printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
return count;
}
mp_register_lapic_address(acpi_lapic_addr);
count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
MAX_APICS);
if (!count) {
printk(KERN_ERR PREFIX "No LAPIC entries present\n");
/* TBD: Cleanup to allow fallback to MPS */
return -ENODEV;
}
else if (count < 0) {
printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return count;
}
count = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
if (count < 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 */
#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
/*
* 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 "noapic" boot option, don't look for IO-APICs
*/
if (ioapic_setup_disabled()) {
printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
"due to 'noapic' option.\n");
return -ENODEV;
}
count = acpi_table_parse_madt(ACPI_MADT_IOAPIC, 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;
}
/* Build a default routing table for legacy (ISA) interrupts. */
mp_config_acpi_legacy_irqs();
count = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, NR_IRQ_VECTORS);
if (count < 0) {
printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return count;
}
count = acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, NR_IRQ_VECTORS);
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 && CONFIG_ACPI_INTERPRETER) */
static void __init
acpi_process_madt(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
int count, error;
count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
if (count == 1) {
/*
* 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_irq_balance_set(NULL);
acpi_ioapic = 1;
smp_found_config = 1;
clustered_apic_check();
}
}
}
#endif
return;
}
/*
* acpi_boot_init()
* called from setup_arch(), always.
* 1. checksums all tables
* 2. enumerates lapics
* 3. enumerates io-apics
*
* side effects:
* 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=...
* ...
*
* return value: (currently ignored)
* 0: success
* !0: failure
*/
int __init
acpi_boot_init (void)
{
int error;
/*
* If acpi_disabled, bail out
* One exception: acpi=ht continues far enough to enumerate LAPICs
*/
if (acpi_disabled && !acpi_ht)
return 1;
/*
* Initialize the ACPI boot-time table parser.
*/
error = acpi_table_init();
if (error) {
acpi_disabled = 1;
return error;
}
(void) acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
/*
* blacklist may disable ACPI entirely
*/
error = acpi_blacklisted();
if (error) {
printk(KERN_WARNING PREFIX "BIOS listed in blacklist, disabling ACPI support\n");
acpi_disabled = 1;
return error;
}
/*
* Process the Multiple APIC Description Table (MADT), if present
*/
acpi_process_madt();
#ifdef CONFIG_X86_PM_TIMER
acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
#endif
#ifdef CONFIG_HPET_TIMER
(void) acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
#endif
#ifdef CONFIG_PCI_MMCONFIG
error = acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
if (error)
printk(KERN_ERR PREFIX "Error %d parsing MCFG\n", error);
#endif
return 0;
}
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