/*
* Parse LAPIC entries in MADT
* returns 0 on success, < 0 on error
*/
static int __init acpi_parse_madt_lapic_entries(void)
{
int count, x2count;
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;
}
mp_register_lapic_address(acpi_lapic_addr);
BUILD_BUG_ON(MAX_APICS != MAX_LOCAL_APIC);
count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
acpi_parse_lapic, MAX_APICS);
x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
acpi_parse_x2apic, 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 < 0 ? count : x2count;
}
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
acpi_parse_lapic_nmi, 0);
x2count =
acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
acpi_parse_x2apic_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 < 0 ? count : x2count;
}
return 0;
}
/*
* acpi_boot_init()
* called from setup_arch(), always.
* 1. maps ACPI tables for later use
* 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() disable_acpi()
* acpi_irq_model=...
* ...
*
* return value: (currently ignored)
* 0: success
* !0: failure
*/
int __init
acpi_boot_init (void)
{
int result = 0;
if (acpi_disabled && !acpi_ht)
return(1);
/*
* The default interrupt routing model is PIC (8259). This gets
* overriden if IOAPICs are enumerated (below).
*/
acpi_irq_model = ACPI_IRQ_MODEL_PIC;
/*
* Initialize the ACPI boot-time table parser.
*/
result = acpi_table_init();
if (result) {
disable_acpi();
return result;
}
#ifdef CONFIG_X86_IO_APIC
check_acpi_pci();
#endif
result = acpi_blacklisted();
if (result) {
printk(KERN_NOTICE PREFIX "BIOS listed in blacklist, disabling ACPI support\n");
disable_acpi();
return result;
}
#ifdef CONFIG_ACPI_MMCONFIG
result = acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
if (result < 0) {
printk(KERN_ERR PREFIX "Error %d parsing MCFG\n", result);
} else if (result > 1) {
printk(KERN_WARNING PREFIX "Multiple MCFG tables exist\n");
}
#endif
#ifdef CONFIG_X86_LOCAL_APIC
/*
* MADT
* ----
* Parse the Multiple APIC Description Table (MADT), if exists.
* Note that this table provides platform SMP configuration
* information -- the successor to MPS tables.
*/
result = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
if (!result) {
return 0;
}
else if (result < 0) {
printk(KERN_ERR PREFIX "Error parsing MADT\n");
return result;
}
else if (result > 1)
printk(KERN_WARNING PREFIX "Multiple MADT tables exist\n");
/*
* Local APIC
* ----------
* 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).
*/
result = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr);
if (result < 0) {
printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
return result;
}
mp_register_lapic_address(acpi_lapic_addr);
result = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic);
if (!result) {
printk(KERN_ERR PREFIX "No LAPIC entries present\n");
/* TBD: Cleanup to allow fallback to MPS */
return -ENODEV;
}
else if (result < 0) {
printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return result;
}
result = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi);
if (result < 0) {
printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return result;
}
acpi_lapic = 1;
#endif /*CONFIG_X86_LOCAL_APIC*/
#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
/*
* I/O APIC
* --------
*/
/*
* 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 1;
}
/*
* 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 1;
}
result = mp_irqs_alloc(); /* Dynamically allocate mp_irqs[] */
if (result < 0) {
acpi_noirq = 1;
return result;
}
result = acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic);
if (!result) {
printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
return -ENODEV;
}
else if (result < 0) {
printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
return result;
}
/* Record sci_int for use when looking for MADT sci_int override */
acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
result = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr);
if (result < 0) {
printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return result;
}
/*
* 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_fadt.sci_int, 0, 0);
/* Fill in identity legacy mapings where no override */
mp_config_acpi_legacy_irqs();
result = acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src);
if (result < 0) {
printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
/* TBD: Cleanup to allow fallback to MPS */
return result;
}
acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
acpi_irq_balance_set(NULL);
acpi_ioapic = 1;
if (acpi_lapic && acpi_ioapic)
smp_found_config = 1;
#endif /*CONFIG_X86_IO_APIC && CONFIG_ACPI_INTERPRETER*/
return 0;
}
