diff options
Diffstat (limited to 'arch/x86/kernel/apic/io_apic.c')
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 424f795a1c7..4208ea9edc1 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -129,10 +129,17 @@ u32 mp_pin_to_gsi(int ioapic, int pin) return mp_ioapic_gsi_routing(ioapic)->gsi_base + pin; } -/* Initialize all legacy IRQs and all pins on the first IOAPIC at boot */ +/* + * Initialize all legacy IRQs and all pins on the first IOAPIC + * if we have legacy interrupt controller. Kernel boot option "pirq=" + * may rely on non-legacy pins on the first IOAPIC. + */ static inline int mp_init_irq_at_boot(int ioapic, int irq) { - return ioapic == 0 || (irq >= 0 && irq < NR_IRQS_LEGACY); + if (!nr_legacy_irqs()) + return 0; + + return ioapic == 0 || (irq >= 0 && irq < nr_legacy_irqs()); } int nr_ioapics; @@ -216,7 +223,7 @@ int __init arch_early_irq_init(void) struct irq_cfg *cfg; int count, node, i; - if (!legacy_pic->nr_legacy_irqs) + if (!nr_legacy_irqs()) io_apic_irqs = ~0UL; for_each_ioapic(i) { @@ -239,7 +246,7 @@ int __init arch_early_irq_init(void) * For legacy IRQ's, start with assigning irq0 to irq15 to * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's. */ - if (i < legacy_pic->nr_legacy_irqs) { + if (i < nr_legacy_irqs()) { cfg[i].vector = IRQ0_VECTOR + i; cpumask_setall(cfg[i].domain); } @@ -823,7 +830,7 @@ static int __init find_isa_irq_apic(int irq, int type) */ static int EISA_ELCR(unsigned int irq) { - if (irq < legacy_pic->nr_legacy_irqs) { + if (irq < nr_legacy_irqs()) { unsigned int port = 0x4d0 + (irq >> 3); return (inb(port) >> (irq & 7)) & 1; } @@ -980,7 +987,7 @@ static int pin_2_irq(int idx, int apic, int pin) } else { u32 gsi = gsi_cfg->gsi_base + pin; - if (gsi >= NR_IRQS_LEGACY) + if (gsi >= nr_legacy_irqs()) irq = gsi; else irq = gsi_top + gsi; @@ -1357,7 +1364,7 @@ static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg, } ioapic_register_intr(irq, cfg, attr->trigger); - if (irq < legacy_pic->nr_legacy_irqs) + if (irq < nr_legacy_irqs()) legacy_pic->mask(irq); ioapic_write_entry(attr->ioapic, attr->ioapic_pin, entry); @@ -1782,7 +1789,7 @@ __apicdebuginit(void) print_PIC(void) unsigned int v; unsigned long flags; - if (!legacy_pic->nr_legacy_irqs) + if (!nr_legacy_irqs()) return; printk(KERN_DEBUG "\nprinting PIC contents\n"); @@ -1854,7 +1861,7 @@ void __init enable_IO_APIC(void) int i8259_apic, i8259_pin; int apic, pin; - if (!legacy_pic->nr_legacy_irqs) + if (!nr_legacy_irqs()) return; for_each_ioapic_pin(apic, pin) { @@ -1939,7 +1946,7 @@ void disable_IO_APIC(void) */ clear_IO_APIC(); - if (!legacy_pic->nr_legacy_irqs) + if (!nr_legacy_irqs()) return; x86_io_apic_ops.disable(); @@ -2143,7 +2150,7 @@ static unsigned int startup_ioapic_irq(struct irq_data *data) unsigned long flags; raw_spin_lock_irqsave(&ioapic_lock, flags); - if (irq < legacy_pic->nr_legacy_irqs) { + if (irq < nr_legacy_irqs()) { legacy_pic->mask(irq); if (legacy_pic->irq_pending(irq)) was_pending = 1; @@ -2542,7 +2549,7 @@ static inline void init_IO_APIC_traps(void) * so default to an old-fashioned 8259 * interrupt if we can.. */ - if (irq < legacy_pic->nr_legacy_irqs) + if (irq < nr_legacy_irqs()) legacy_pic->make_irq(irq); else /* Strange. Oh, well.. */ @@ -2839,7 +2846,7 @@ void __init setup_IO_APIC(void) /* * calling enable_IO_APIC() is moved to setup_local_APIC for BP */ - io_apic_irqs = legacy_pic->nr_legacy_irqs ? ~PIC_IRQS : ~0UL; + io_apic_irqs = nr_legacy_irqs() ? ~PIC_IRQS : ~0UL; apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n"); /* @@ -2850,7 +2857,7 @@ void __init setup_IO_APIC(void) sync_Arb_IDs(); setup_IO_APIC_irqs(); init_IO_APIC_traps(); - if (legacy_pic->nr_legacy_irqs) + if (nr_legacy_irqs()) check_timer(); } @@ -3348,7 +3355,7 @@ static int __init io_apic_get_redir_entries(int ioapic) unsigned int arch_dynirq_lower_bound(unsigned int from) { - unsigned int min = gsi_top + NR_IRQS_LEGACY; + unsigned int min = gsi_top + nr_legacy_irqs(); return from < min ? min : from; } @@ -3360,17 +3367,17 @@ int __init arch_probe_nr_irqs(void) if (nr_irqs > (NR_VECTORS * nr_cpu_ids)) nr_irqs = NR_VECTORS * nr_cpu_ids; - nr = (gsi_top + NR_IRQS_LEGACY) + 8 * nr_cpu_ids; + nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids; #if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ) /* * for MSI and HT dyn irq */ - nr += (gsi_top + NR_IRQS_LEGACY) * 16; + nr += gsi_top * 16; #endif if (nr < nr_irqs) nr_irqs = nr; - return NR_IRQS_LEGACY; + return nr_legacy_irqs(); } int io_apic_set_pci_routing(struct device *dev, int irq, |