config X86_LOCAL_APIC
def_bool y
depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI
+ select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
config X86_IO_APIC
def_bool y
depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC || PCI_MSI
- select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
select IRQ_DOMAIN
config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
#endif /* CONFIG_IRQ_REMAP */
#ifdef CONFIG_X86_LOCAL_APIC
+struct irq_data;
+
struct irq_cfg {
cpumask_var_t domain;
cpumask_var_t old_domain;
extern struct irq_cfg *irq_cfg(unsigned int irq);
extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
-extern void setup_vector_irq(int cpu);
+extern struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node);
+extern void lock_vector_lock(void);
+extern void unlock_vector_lock(void);
extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
+extern void clear_irq_vector(int irq, struct irq_cfg *cfg);
+extern void setup_vector_irq(int cpu);
#ifdef CONFIG_SMP
extern void send_cleanup_vector(struct irq_cfg *);
#else
static inline void send_cleanup_vector(struct irq_cfg *c) { }
#endif
+extern void irq_complete_move(struct irq_cfg *cfg);
-struct irq_data;
-int apic_set_affinity(struct irq_data *, const struct cpumask *,
- unsigned int *dest_id);
-#endif /* CONFIG_X86_LOCAL_APIC */
-
-#ifdef CONFIG_X86_IO_APIC
-extern void lock_vector_lock(void);
-extern void unlock_vector_lock(void);
-extern void __setup_vector_irq(int cpu);
-#else
+extern int apic_retrigger_irq(struct irq_data *data);
+extern void apic_ack_edge(struct irq_data *data);
+extern int apic_set_affinity(struct irq_data *data, const struct cpumask *mask,
+ unsigned int *dest_id);
+#else /* CONFIG_X86_LOCAL_APIC */
static inline void lock_vector_lock(void) {}
static inline void unlock_vector_lock(void) {}
-static inline void __setup_vector_irq(int cpu) {}
-#endif
+#endif /* CONFIG_X86_LOCAL_APIC */
/* IOAPIC */
#ifdef CONFIG_X86_IO_APIC
extern void disable_IO_APIC(void);
extern void setup_ioapic_dest(void);
extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin);
+extern void print_IO_APICs(void);
extern unsigned long io_apic_irqs;
#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1 << (x)) & io_apic_irqs))
#else /* CONFIG_X86_IO_APIC */
#define IO_APIC_IRQ(x) 0
+static inline void print_IO_APICs(void) {}
#endif /* CONFIG_X86_IO_APIC */
/* Statistics */
# Makefile for local APIC drivers and for the IO-APIC code
#
-obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_noop.o ipi.o
+obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_noop.o ipi.o vector.o
obj-y += hw_nmi.o
obj-$(CONFIG_X86_IO_APIC) += io_apic.o
#include <asm/apic.h>
-#define __apicdebuginit(type) static type __init
-
#define for_each_ioapic(idx) \
for ((idx) = 0; (idx) < nr_ioapics; (idx)++)
#define for_each_ioapic_reverse(idx) \
int sis_apic_bug = -1;
static DEFINE_RAW_SPINLOCK(ioapic_lock);
-static DEFINE_RAW_SPINLOCK(vector_lock);
static DEFINE_MUTEX(ioapic_mutex);
static unsigned int ioapic_dynirq_base;
static int ioapic_initialized;
}
early_param("noapic", parse_noapic);
-static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node);
-
/* Will be called in mpparse/acpi/sfi codes for saving IRQ info */
void mp_save_irq(struct mpc_intsrc *m)
{
return 0;
}
-struct irq_cfg *irq_cfg(unsigned int irq)
-{
- return irq_get_chip_data(irq);
-}
-
-struct irq_cfg *irqd_cfg(struct irq_data *irq_data)
-{
- return irq_data->chip_data;
-}
-
-static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node)
-{
- struct irq_cfg *cfg;
-
- cfg = kzalloc_node(sizeof(*cfg), GFP_KERNEL, node);
- if (!cfg)
- return NULL;
- if (!zalloc_cpumask_var_node(&cfg->domain, GFP_KERNEL, node))
- goto out_cfg;
- if (!zalloc_cpumask_var_node(&cfg->old_domain, GFP_KERNEL, node))
- goto out_domain;
- INIT_LIST_HEAD(&cfg->irq_2_pin);
- return cfg;
-out_domain:
- free_cpumask_var(cfg->domain);
-out_cfg:
- kfree(cfg);
- return NULL;
-}
-
-static void free_irq_cfg(unsigned int at, struct irq_cfg *cfg)
-{
- if (!cfg)
- return;
- irq_set_chip_data(at, NULL);
- free_cpumask_var(cfg->domain);
- free_cpumask_var(cfg->old_domain);
- kfree(cfg);
-}
-
-static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node)
-{
- int res = irq_alloc_desc_at(at, node);
- struct irq_cfg *cfg;
-
- if (res < 0) {
- if (res != -EEXIST)
- return NULL;
- cfg = irq_cfg(at);
- if (cfg)
- return cfg;
- }
-
- cfg = alloc_irq_cfg(at, node);
- if (cfg)
- irq_set_chip_data(at, cfg);
- else
- irq_free_desc(at);
- return cfg;
-}
-
struct io_apic {
unsigned int index;
unsigned int unused[3];
}
EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
-void lock_vector_lock(void)
-{
- /* Used to the online set of cpus does not change
- * during assign_irq_vector.
- */
- raw_spin_lock(&vector_lock);
-}
-
-void unlock_vector_lock(void)
-{
- raw_spin_unlock(&vector_lock);
-}
-
-static int
-__assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
-{
- /*
- * NOTE! The local APIC isn't very good at handling
- * multiple interrupts at the same interrupt level.
- * As the interrupt level is determined by taking the
- * vector number and shifting that right by 4, we
- * want to spread these out a bit so that they don't
- * all fall in the same interrupt level.
- *
- * Also, we've got to be careful not to trash gate
- * 0x80, because int 0x80 is hm, kind of importantish. ;)
- */
- static int current_vector = FIRST_EXTERNAL_VECTOR + VECTOR_OFFSET_START;
- static int current_offset = VECTOR_OFFSET_START % 16;
- int cpu, err;
- cpumask_var_t tmp_mask;
-
- if (cfg->move_in_progress)
- return -EBUSY;
-
- if (!alloc_cpumask_var(&tmp_mask, GFP_ATOMIC))
- return -ENOMEM;
-
- /* Only try and allocate irqs on cpus that are present */
- err = -ENOSPC;
- cpumask_clear(cfg->old_domain);
- cpu = cpumask_first_and(mask, cpu_online_mask);
- while (cpu < nr_cpu_ids) {
- int new_cpu, vector, offset;
-
- apic->vector_allocation_domain(cpu, tmp_mask, mask);
-
- if (cpumask_subset(tmp_mask, cfg->domain)) {
- err = 0;
- if (cpumask_equal(tmp_mask, cfg->domain))
- break;
- /*
- * New cpumask using the vector is a proper subset of
- * the current in use mask. So cleanup the vector
- * allocation for the members that are not used anymore.
- */
- cpumask_andnot(cfg->old_domain, cfg->domain, tmp_mask);
- cfg->move_in_progress =
- cpumask_intersects(cfg->old_domain, cpu_online_mask);
- cpumask_and(cfg->domain, cfg->domain, tmp_mask);
- break;
- }
-
- vector = current_vector;
- offset = current_offset;
-next:
- vector += 16;
- if (vector >= first_system_vector) {
- offset = (offset + 1) % 16;
- vector = FIRST_EXTERNAL_VECTOR + offset;
- }
-
- if (unlikely(current_vector == vector)) {
- cpumask_or(cfg->old_domain, cfg->old_domain, tmp_mask);
- cpumask_andnot(tmp_mask, mask, cfg->old_domain);
- cpu = cpumask_first_and(tmp_mask, cpu_online_mask);
- continue;
- }
-
- if (test_bit(vector, used_vectors))
- goto next;
-
- for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) {
- if (per_cpu(vector_irq, new_cpu)[vector] > VECTOR_UNDEFINED)
- goto next;
- }
- /* Found one! */
- current_vector = vector;
- current_offset = offset;
- if (cfg->vector) {
- cpumask_copy(cfg->old_domain, cfg->domain);
- cfg->move_in_progress =
- cpumask_intersects(cfg->old_domain, cpu_online_mask);
- }
- for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask)
- per_cpu(vector_irq, new_cpu)[vector] = irq;
- cfg->vector = vector;
- cpumask_copy(cfg->domain, tmp_mask);
- err = 0;
- break;
- }
- free_cpumask_var(tmp_mask);
- return err;
-}
-
-int assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
-{
- int err;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&vector_lock, flags);
- err = __assign_irq_vector(irq, cfg, mask);
- raw_spin_unlock_irqrestore(&vector_lock, flags);
- return err;
-}
-
-static void clear_irq_vector(int irq, struct irq_cfg *cfg)
-{
- int cpu, vector;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&vector_lock, flags);
- BUG_ON(!cfg->vector);
-
- vector = cfg->vector;
- for_each_cpu_and(cpu, cfg->domain, cpu_online_mask)
- per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED;
-
- cfg->vector = 0;
- cpumask_clear(cfg->domain);
-
- if (likely(!cfg->move_in_progress)) {
- raw_spin_unlock_irqrestore(&vector_lock, flags);
- return;
- }
-
- for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) {
- for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
- if (per_cpu(vector_irq, cpu)[vector] != irq)
- continue;
- per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED;
- break;
- }
- }
- cfg->move_in_progress = 0;
- raw_spin_unlock_irqrestore(&vector_lock, flags);
-}
-
-void __setup_vector_irq(int cpu)
-{
- /* Initialize vector_irq on a new cpu */
- int irq, vector;
- struct irq_cfg *cfg;
-
- /*
- * vector_lock will make sure that we don't run into irq vector
- * assignments that might be happening on another cpu in parallel,
- * while we setup our initial vector to irq mappings.
- */
- raw_spin_lock(&vector_lock);
- /* Mark the inuse vectors */
- for_each_active_irq(irq) {
- cfg = irq_cfg(irq);
- if (!cfg)
- continue;
-
- if (!cpumask_test_cpu(cpu, cfg->domain))
- continue;
- vector = cfg->vector;
- per_cpu(vector_irq, cpu)[vector] = irq;
- }
- /* Mark the free vectors */
- for (vector = 0; vector < NR_VECTORS; ++vector) {
- irq = per_cpu(vector_irq, cpu)[vector];
- if (irq <= VECTOR_UNDEFINED)
- continue;
-
- cfg = irq_cfg(irq);
- if (!cpumask_test_cpu(cpu, cfg->domain))
- per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED;
- }
- raw_spin_unlock(&vector_lock);
-}
-
static struct irq_chip ioapic_chip;
#ifdef CONFIG_X86_32
raw_spin_lock_init(&ioapic_lock);
}
-__apicdebuginit(void) print_IO_APIC(int ioapic_idx)
+static void __init print_IO_APIC(int ioapic_idx)
{
union IO_APIC_reg_00 reg_00;
union IO_APIC_reg_01 reg_01;
x86_io_apic_ops.print_entries(ioapic_idx, reg_01.bits.entries);
}
-__apicdebuginit(void) print_IO_APICs(void)
+void __init print_IO_APICs(void)
{
int ioapic_idx;
struct irq_cfg *cfg;
printk(KERN_INFO ".................................... done.\n");
}
-__apicdebuginit(void) print_APIC_field(int base)
-{
- int i;
-
- printk(KERN_DEBUG);
-
- for (i = 0; i < 8; i++)
- pr_cont("%08x", apic_read(base + i*0x10));
-
- pr_cont("\n");
-}
-
-__apicdebuginit(void) print_local_APIC(void *dummy)
-{
- unsigned int i, v, ver, maxlvt;
- u64 icr;
-
- printk(KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
- smp_processor_id(), hard_smp_processor_id());
- v = apic_read(APIC_ID);
- printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, read_apic_id());
- v = apic_read(APIC_LVR);
- printk(KERN_INFO "... APIC VERSION: %08x\n", v);
- ver = GET_APIC_VERSION(v);
- maxlvt = lapic_get_maxlvt();
-
- v = apic_read(APIC_TASKPRI);
- printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
-
- if (APIC_INTEGRATED(ver)) { /* !82489DX */
- if (!APIC_XAPIC(ver)) {
- v = apic_read(APIC_ARBPRI);
- printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
- v & APIC_ARBPRI_MASK);
- }
- v = apic_read(APIC_PROCPRI);
- printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
- }
-
- /*
- * Remote read supported only in the 82489DX and local APIC for
- * Pentium processors.
- */
- if (!APIC_INTEGRATED(ver) || maxlvt == 3) {
- v = apic_read(APIC_RRR);
- printk(KERN_DEBUG "... APIC RRR: %08x\n", v);
- }
-
- v = apic_read(APIC_LDR);
- printk(KERN_DEBUG "... APIC LDR: %08x\n", v);
- if (!x2apic_enabled()) {
- v = apic_read(APIC_DFR);
- printk(KERN_DEBUG "... APIC DFR: %08x\n", v);
- }
- v = apic_read(APIC_SPIV);
- printk(KERN_DEBUG "... APIC SPIV: %08x\n", v);
-
- printk(KERN_DEBUG "... APIC ISR field:\n");
- print_APIC_field(APIC_ISR);
- printk(KERN_DEBUG "... APIC TMR field:\n");
- print_APIC_field(APIC_TMR);
- printk(KERN_DEBUG "... APIC IRR field:\n");
- print_APIC_field(APIC_IRR);
-
- if (APIC_INTEGRATED(ver)) { /* !82489DX */
- if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
- apic_write(APIC_ESR, 0);
-
- v = apic_read(APIC_ESR);
- printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
- }
-
- icr = apic_icr_read();
- printk(KERN_DEBUG "... APIC ICR: %08x\n", (u32)icr);
- printk(KERN_DEBUG "... APIC ICR2: %08x\n", (u32)(icr >> 32));
-
- v = apic_read(APIC_LVTT);
- printk(KERN_DEBUG "... APIC LVTT: %08x\n", v);
-
- if (maxlvt > 3) { /* PC is LVT#4. */
- v = apic_read(APIC_LVTPC);
- printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v);
- }
- v = apic_read(APIC_LVT0);
- printk(KERN_DEBUG "... APIC LVT0: %08x\n", v);
- v = apic_read(APIC_LVT1);
- printk(KERN_DEBUG "... APIC LVT1: %08x\n", v);
-
- if (maxlvt > 2) { /* ERR is LVT#3. */
- v = apic_read(APIC_LVTERR);
- printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v);
- }
-
- v = apic_read(APIC_TMICT);
- printk(KERN_DEBUG "... APIC TMICT: %08x\n", v);
- v = apic_read(APIC_TMCCT);
- printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v);
- v = apic_read(APIC_TDCR);
- printk(KERN_DEBUG "... APIC TDCR: %08x\n", v);
-
- if (boot_cpu_has(X86_FEATURE_EXTAPIC)) {
- v = apic_read(APIC_EFEAT);
- maxlvt = (v >> 16) & 0xff;
- printk(KERN_DEBUG "... APIC EFEAT: %08x\n", v);
- v = apic_read(APIC_ECTRL);
- printk(KERN_DEBUG "... APIC ECTRL: %08x\n", v);
- for (i = 0; i < maxlvt; i++) {
- v = apic_read(APIC_EILVTn(i));
- printk(KERN_DEBUG "... APIC EILVT%d: %08x\n", i, v);
- }
- }
- pr_cont("\n");
-}
-
-__apicdebuginit(void) print_local_APICs(int maxcpu)
-{
- int cpu;
-
- if (!maxcpu)
- return;
-
- preempt_disable();
- for_each_online_cpu(cpu) {
- if (cpu >= maxcpu)
- break;
- smp_call_function_single(cpu, print_local_APIC, NULL, 1);
- }
- preempt_enable();
-}
-
-__apicdebuginit(void) print_PIC(void)
-{
- unsigned int v;
- unsigned long flags;
-
- if (!nr_legacy_irqs())
- return;
-
- printk(KERN_DEBUG "\nprinting PIC contents\n");
-
- raw_spin_lock_irqsave(&i8259A_lock, flags);
-
- v = inb(0xa1) << 8 | inb(0x21);
- printk(KERN_DEBUG "... PIC IMR: %04x\n", v);
-
- v = inb(0xa0) << 8 | inb(0x20);
- printk(KERN_DEBUG "... PIC IRR: %04x\n", v);
-
- outb(0x0b,0xa0);
- outb(0x0b,0x20);
- v = inb(0xa0) << 8 | inb(0x20);
- outb(0x0a,0xa0);
- outb(0x0a,0x20);
-
- raw_spin_unlock_irqrestore(&i8259A_lock, flags);
-
- printk(KERN_DEBUG "... PIC ISR: %04x\n", v);
-
- v = inb(0x4d1) << 8 | inb(0x4d0);
- printk(KERN_DEBUG "... PIC ELCR: %04x\n", v);
-}
-
-static int __initdata show_lapic = 1;
-static __init int setup_show_lapic(char *arg)
-{
- int num = -1;
-
- if (strcmp(arg, "all") == 0) {
- show_lapic = CONFIG_NR_CPUS;
- } else {
- get_option(&arg, &num);
- if (num >= 0)
- show_lapic = num;
- }
-
- return 1;
-}
-__setup("show_lapic=", setup_show_lapic);
-
-__apicdebuginit(int) print_ICs(void)
-{
- if (apic_verbosity == APIC_QUIET)
- return 0;
-
- print_PIC();
-
- /* don't print out if apic is not there */
- if (!cpu_has_apic && !apic_from_smp_config())
- return 0;
-
- print_local_APICs(show_lapic);
- print_IO_APICs();
-
- return 0;
-}
-
-late_initcall(print_ICs);
-
-
/* Where if anywhere is the i8259 connect in external int mode */
static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
return was_pending;
}
-static int apic_retrigger_irq(struct irq_data *data)
-{
- struct irq_cfg *cfg = data->chip_data;
- unsigned long flags;
- int cpu;
-
- raw_spin_lock_irqsave(&vector_lock, flags);
- cpu = cpumask_first_and(cfg->domain, cpu_online_mask);
- apic->send_IPI_mask(cpumask_of(cpu), cfg->vector);
- raw_spin_unlock_irqrestore(&vector_lock, flags);
-
- return 1;
-}
-
/*
* Level and edge triggered IO-APIC interrupts need different handling,
* so we use two separate IRQ descriptors. Edge triggered IRQs can be
* races.
*/
-#ifdef CONFIG_SMP
-void send_cleanup_vector(struct irq_cfg *cfg)
-{
- cpumask_var_t cleanup_mask;
-
- if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) {
- unsigned int i;
- for_each_cpu_and(i, cfg->old_domain, cpu_online_mask)
- apic->send_IPI_mask(cpumask_of(i), IRQ_MOVE_CLEANUP_VECTOR);
- } else {
- cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask);
- apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
- free_cpumask_var(cleanup_mask);
- }
- cfg->move_in_progress = 0;
-}
-
-asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
-{
- unsigned vector, me;
-
- ack_APIC_irq();
- irq_enter();
- exit_idle();
-
- me = smp_processor_id();
- for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
- int irq;
- unsigned int irr;
- struct irq_desc *desc;
- struct irq_cfg *cfg;
- irq = __this_cpu_read(vector_irq[vector]);
-
- if (irq <= VECTOR_UNDEFINED)
- continue;
-
- desc = irq_to_desc(irq);
- if (!desc)
- continue;
-
- cfg = irq_cfg(irq);
- if (!cfg)
- continue;
-
- raw_spin_lock(&desc->lock);
-
- /*
- * Check if the irq migration is in progress. If so, we
- * haven't received the cleanup request yet for this irq.
- */
- if (cfg->move_in_progress)
- goto unlock;
-
- if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
- goto unlock;
-
- irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
- /*
- * Check if the vector that needs to be cleanedup is
- * registered at the cpu's IRR. If so, then this is not
- * the best time to clean it up. Lets clean it up in the
- * next attempt by sending another IRQ_MOVE_CLEANUP_VECTOR
- * to myself.
- */
- if (irr & (1 << (vector % 32))) {
- apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
- goto unlock;
- }
- __this_cpu_write(vector_irq[vector], VECTOR_UNDEFINED);
-unlock:
- raw_spin_unlock(&desc->lock);
- }
-
- irq_exit();
-}
-
-static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector)
-{
- unsigned me;
-
- if (likely(!cfg->move_in_progress))
- return;
-
- me = smp_processor_id();
-
- if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
- send_cleanup_vector(cfg);
-}
-
-static void irq_complete_move(struct irq_cfg *cfg)
-{
- __irq_complete_move(cfg, ~get_irq_regs()->orig_ax);
-}
-
-void irq_force_complete_move(int irq)
-{
- struct irq_cfg *cfg = irq_cfg(irq);
-
- if (!cfg)
- return;
-
- __irq_complete_move(cfg, cfg->vector);
-}
-#else
-static inline void irq_complete_move(struct irq_cfg *cfg) { }
-#endif
-
static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg)
{
int apic, pin;
}
}
-/*
- * Either sets data->affinity to a valid value, and returns
- * ->cpu_mask_to_apicid of that in dest_id, or returns -1 and
- * leaves data->affinity untouched.
- */
-int apic_set_affinity(struct irq_data *data, const struct cpumask *mask,
- unsigned int *dest_id)
-{
- struct irq_cfg *cfg = data->chip_data;
- unsigned int irq = data->irq;
- int err;
-
- if (!config_enabled(CONFIG_SMP))
- return -EPERM;
-
- if (!cpumask_intersects(mask, cpu_online_mask))
- return -EINVAL;
-
- err = assign_irq_vector(irq, cfg, mask);
- if (err)
- return err;
-
- err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, dest_id);
- if (err) {
- if (assign_irq_vector(irq, cfg, data->affinity))
- pr_err("Failed to recover vector for irq %d\n", irq);
- return err;
- }
-
- cpumask_copy(data->affinity, mask);
-
- return 0;
-}
-
-
int native_ioapic_set_affinity(struct irq_data *data,
const struct cpumask *mask,
bool force)
return ret;
}
-static void apic_ack_edge(struct irq_data *data)
-{
- irq_complete_move(data->chip_data);
- irq_move_irq(data);
- ack_APIC_irq();
-}
-
atomic_t irq_mis_count;
#ifdef CONFIG_GENERIC_PENDING_IRQ
device_initcall(ioapic_init_ops);
-/*
- * Dynamic irq allocate and deallocation. Should be replaced by irq domains!
- */
-int arch_setup_hwirq(unsigned int irq, int node)
-{
- struct irq_cfg *cfg;
- unsigned long flags;
- int ret;
-
- cfg = alloc_irq_cfg(irq, node);
- if (!cfg)
- return -ENOMEM;
-
- raw_spin_lock_irqsave(&vector_lock, flags);
- ret = __assign_irq_vector(irq, cfg, apic->target_cpus());
- raw_spin_unlock_irqrestore(&vector_lock, flags);
-
- if (!ret)
- irq_set_chip_data(irq, cfg);
- else
- free_irq_cfg(irq, cfg);
- return ret;
-}
-
-void arch_teardown_hwirq(unsigned int irq)
-{
- struct irq_cfg *cfg = irq_cfg(irq);
-
- free_remapped_irq(irq);
- clear_irq_vector(irq, cfg);
- free_irq_cfg(irq, cfg);
-}
-
/*
* MSI message composition
*/
--- /dev/null
+/*
+ * Local APIC related interfaces to support IOAPIC, MSI, HT_IRQ etc.
+ *
+ * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo
+ * Moved from arch/x86/kernel/apic/io_apic.c.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/compiler.h>
+#include <linux/irqdomain.h>
+#include <linux/slab.h>
+#include <asm/hw_irq.h>
+#include <asm/apic.h>
+#include <asm/i8259.h>
+#include <asm/desc.h>
+#include <asm/irq_remapping.h>
+
+static DEFINE_RAW_SPINLOCK(vector_lock);
+
+void lock_vector_lock(void)
+{
+ /* Used to the online set of cpus does not change
+ * during assign_irq_vector.
+ */
+ raw_spin_lock(&vector_lock);
+}
+
+void unlock_vector_lock(void)
+{
+ raw_spin_unlock(&vector_lock);
+}
+
+struct irq_cfg *irq_cfg(unsigned int irq)
+{
+ return irq_get_chip_data(irq);
+}
+
+struct irq_cfg *irqd_cfg(struct irq_data *irq_data)
+{
+ return irq_data->chip_data;
+}
+
+static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node)
+{
+ struct irq_cfg *cfg;
+
+ cfg = kzalloc_node(sizeof(*cfg), GFP_KERNEL, node);
+ if (!cfg)
+ return NULL;
+ if (!zalloc_cpumask_var_node(&cfg->domain, GFP_KERNEL, node))
+ goto out_cfg;
+ if (!zalloc_cpumask_var_node(&cfg->old_domain, GFP_KERNEL, node))
+ goto out_domain;
+#ifdef CONFIG_X86_IO_APIC
+ INIT_LIST_HEAD(&cfg->irq_2_pin);
+#endif
+ return cfg;
+out_domain:
+ free_cpumask_var(cfg->domain);
+out_cfg:
+ kfree(cfg);
+ return NULL;
+}
+
+struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node)
+{
+ int res = irq_alloc_desc_at(at, node);
+ struct irq_cfg *cfg;
+
+ if (res < 0) {
+ if (res != -EEXIST)
+ return NULL;
+ cfg = irq_cfg(at);
+ if (cfg)
+ return cfg;
+ }
+
+ cfg = alloc_irq_cfg(at, node);
+ if (cfg)
+ irq_set_chip_data(at, cfg);
+ else
+ irq_free_desc(at);
+ return cfg;
+}
+
+static void free_irq_cfg(unsigned int at, struct irq_cfg *cfg)
+{
+ if (!cfg)
+ return;
+ irq_set_chip_data(at, NULL);
+ free_cpumask_var(cfg->domain);
+ free_cpumask_var(cfg->old_domain);
+ kfree(cfg);
+}
+
+static int
+__assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
+{
+ /*
+ * NOTE! The local APIC isn't very good at handling
+ * multiple interrupts at the same interrupt level.
+ * As the interrupt level is determined by taking the
+ * vector number and shifting that right by 4, we
+ * want to spread these out a bit so that they don't
+ * all fall in the same interrupt level.
+ *
+ * Also, we've got to be careful not to trash gate
+ * 0x80, because int 0x80 is hm, kind of importantish. ;)
+ */
+ static int current_vector = FIRST_EXTERNAL_VECTOR + VECTOR_OFFSET_START;
+ static int current_offset = VECTOR_OFFSET_START % 16;
+ int cpu, err;
+ cpumask_var_t tmp_mask;
+
+ if (cfg->move_in_progress)
+ return -EBUSY;
+
+ if (!alloc_cpumask_var(&tmp_mask, GFP_ATOMIC))
+ return -ENOMEM;
+
+ /* Only try and allocate irqs on cpus that are present */
+ err = -ENOSPC;
+ cpumask_clear(cfg->old_domain);
+ cpu = cpumask_first_and(mask, cpu_online_mask);
+ while (cpu < nr_cpu_ids) {
+ int new_cpu, vector, offset;
+
+ apic->vector_allocation_domain(cpu, tmp_mask, mask);
+
+ if (cpumask_subset(tmp_mask, cfg->domain)) {
+ err = 0;
+ if (cpumask_equal(tmp_mask, cfg->domain))
+ break;
+ /*
+ * New cpumask using the vector is a proper subset of
+ * the current in use mask. So cleanup the vector
+ * allocation for the members that are not used anymore.
+ */
+ cpumask_andnot(cfg->old_domain, cfg->domain, tmp_mask);
+ cfg->move_in_progress =
+ cpumask_intersects(cfg->old_domain, cpu_online_mask);
+ cpumask_and(cfg->domain, cfg->domain, tmp_mask);
+ break;
+ }
+
+ vector = current_vector;
+ offset = current_offset;
+next:
+ vector += 16;
+ if (vector >= first_system_vector) {
+ offset = (offset + 1) % 16;
+ vector = FIRST_EXTERNAL_VECTOR + offset;
+ }
+
+ if (unlikely(current_vector == vector)) {
+ cpumask_or(cfg->old_domain, cfg->old_domain, tmp_mask);
+ cpumask_andnot(tmp_mask, mask, cfg->old_domain);
+ cpu = cpumask_first_and(tmp_mask, cpu_online_mask);
+ continue;
+ }
+
+ if (test_bit(vector, used_vectors))
+ goto next;
+
+ for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) {
+ if (per_cpu(vector_irq, new_cpu)[vector] >
+ VECTOR_UNDEFINED)
+ goto next;
+ }
+ /* Found one! */
+ current_vector = vector;
+ current_offset = offset;
+ if (cfg->vector) {
+ cpumask_copy(cfg->old_domain, cfg->domain);
+ cfg->move_in_progress =
+ cpumask_intersects(cfg->old_domain, cpu_online_mask);
+ }
+ for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask)
+ per_cpu(vector_irq, new_cpu)[vector] = irq;
+ cfg->vector = vector;
+ cpumask_copy(cfg->domain, tmp_mask);
+ err = 0;
+ break;
+ }
+ free_cpumask_var(tmp_mask);
+
+ return err;
+}
+
+int assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
+{
+ int err;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+ err = __assign_irq_vector(irq, cfg, mask);
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+ return err;
+}
+
+void clear_irq_vector(int irq, struct irq_cfg *cfg)
+{
+ int cpu, vector;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+ BUG_ON(!cfg->vector);
+
+ vector = cfg->vector;
+ for_each_cpu_and(cpu, cfg->domain, cpu_online_mask)
+ per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED;
+
+ cfg->vector = 0;
+ cpumask_clear(cfg->domain);
+
+ if (likely(!cfg->move_in_progress)) {
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+ return;
+ }
+
+ for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) {
+ for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS;
+ vector++) {
+ if (per_cpu(vector_irq, cpu)[vector] != irq)
+ continue;
+ per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED;
+ break;
+ }
+ }
+ cfg->move_in_progress = 0;
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+}
+
+static void __setup_vector_irq(int cpu)
+{
+ /* Initialize vector_irq on a new cpu */
+ int irq, vector;
+ struct irq_cfg *cfg;
+
+ /*
+ * vector_lock will make sure that we don't run into irq vector
+ * assignments that might be happening on another cpu in parallel,
+ * while we setup our initial vector to irq mappings.
+ */
+ raw_spin_lock(&vector_lock);
+ /* Mark the inuse vectors */
+ for_each_active_irq(irq) {
+ cfg = irq_cfg(irq);
+ if (!cfg)
+ continue;
+
+ if (!cpumask_test_cpu(cpu, cfg->domain))
+ continue;
+ vector = cfg->vector;
+ per_cpu(vector_irq, cpu)[vector] = irq;
+ }
+ /* Mark the free vectors */
+ for (vector = 0; vector < NR_VECTORS; ++vector) {
+ irq = per_cpu(vector_irq, cpu)[vector];
+ if (irq <= VECTOR_UNDEFINED)
+ continue;
+
+ cfg = irq_cfg(irq);
+ if (!cpumask_test_cpu(cpu, cfg->domain))
+ per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED;
+ }
+ raw_spin_unlock(&vector_lock);
+}
+
+/*
+ * Setup the vector to irq mappings.
+ */
+void setup_vector_irq(int cpu)
+{
+ int irq;
+
+ /*
+ * On most of the platforms, legacy PIC delivers the interrupts on the
+ * boot cpu. But there are certain platforms where PIC interrupts are
+ * delivered to multiple cpu's. If the legacy IRQ is handled by the
+ * legacy PIC, for the new cpu that is coming online, setup the static
+ * legacy vector to irq mapping:
+ */
+ for (irq = 0; irq < nr_legacy_irqs(); irq++)
+ per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq;
+
+ __setup_vector_irq(cpu);
+}
+
+int apic_retrigger_irq(struct irq_data *data)
+{
+ struct irq_cfg *cfg = data->chip_data;
+ unsigned long flags;
+ int cpu;
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+ cpu = cpumask_first_and(cfg->domain, cpu_online_mask);
+ apic->send_IPI_mask(cpumask_of(cpu), cfg->vector);
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+
+ return 1;
+}
+
+void apic_ack_edge(struct irq_data *data)
+{
+ irq_complete_move(data->chip_data);
+ irq_move_irq(data);
+ ack_APIC_irq();
+}
+
+/*
+ * Either sets data->affinity to a valid value, and returns
+ * ->cpu_mask_to_apicid of that in dest_id, or returns -1 and
+ * leaves data->affinity untouched.
+ */
+int apic_set_affinity(struct irq_data *data, const struct cpumask *mask,
+ unsigned int *dest_id)
+{
+ struct irq_cfg *cfg = data->chip_data;
+ unsigned int irq = data->irq;
+ int err;
+
+ if (!config_enabled(CONFIG_SMP))
+ return -EPERM;
+
+ if (!cpumask_intersects(mask, cpu_online_mask))
+ return -EINVAL;
+
+ err = assign_irq_vector(irq, cfg, mask);
+ if (err)
+ return err;
+
+ err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, dest_id);
+ if (err) {
+ if (assign_irq_vector(irq, cfg, data->affinity))
+ pr_err("Failed to recover vector for irq %d\n", irq);
+ return err;
+ }
+
+ cpumask_copy(data->affinity, mask);
+
+ return 0;
+}
+
+#ifdef CONFIG_SMP
+void send_cleanup_vector(struct irq_cfg *cfg)
+{
+ cpumask_var_t cleanup_mask;
+
+ if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) {
+ unsigned int i;
+
+ for_each_cpu_and(i, cfg->old_domain, cpu_online_mask)
+ apic->send_IPI_mask(cpumask_of(i),
+ IRQ_MOVE_CLEANUP_VECTOR);
+ } else {
+ cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask);
+ apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
+ free_cpumask_var(cleanup_mask);
+ }
+ cfg->move_in_progress = 0;
+}
+
+asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
+{
+ unsigned vector, me;
+
+ ack_APIC_irq();
+ irq_enter();
+ exit_idle();
+
+ me = smp_processor_id();
+ for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
+ int irq;
+ unsigned int irr;
+ struct irq_desc *desc;
+ struct irq_cfg *cfg;
+
+ irq = __this_cpu_read(vector_irq[vector]);
+
+ if (irq <= VECTOR_UNDEFINED)
+ continue;
+
+ desc = irq_to_desc(irq);
+ if (!desc)
+ continue;
+
+ cfg = irq_cfg(irq);
+ if (!cfg)
+ continue;
+
+ raw_spin_lock(&desc->lock);
+
+ /*
+ * Check if the irq migration is in progress. If so, we
+ * haven't received the cleanup request yet for this irq.
+ */
+ if (cfg->move_in_progress)
+ goto unlock;
+
+ if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
+ goto unlock;
+
+ irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
+ /*
+ * Check if the vector that needs to be cleanedup is
+ * registered at the cpu's IRR. If so, then this is not
+ * the best time to clean it up. Lets clean it up in the
+ * next attempt by sending another IRQ_MOVE_CLEANUP_VECTOR
+ * to myself.
+ */
+ if (irr & (1 << (vector % 32))) {
+ apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
+ goto unlock;
+ }
+ __this_cpu_write(vector_irq[vector], VECTOR_UNDEFINED);
+unlock:
+ raw_spin_unlock(&desc->lock);
+ }
+
+ irq_exit();
+}
+
+static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector)
+{
+ unsigned me;
+
+ if (likely(!cfg->move_in_progress))
+ return;
+
+ me = smp_processor_id();
+
+ if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
+ send_cleanup_vector(cfg);
+}
+
+void irq_complete_move(struct irq_cfg *cfg)
+{
+ __irq_complete_move(cfg, ~get_irq_regs()->orig_ax);
+}
+
+void irq_force_complete_move(int irq)
+{
+ struct irq_cfg *cfg = irq_cfg(irq);
+
+ if (!cfg)
+ return;
+
+ __irq_complete_move(cfg, cfg->vector);
+}
+#else
+void irq_complete_move(struct irq_cfg *cfg) { }
+#endif
+
+/*
+ * Dynamic irq allocate and deallocation. Should be replaced by irq domains!
+ */
+int arch_setup_hwirq(unsigned int irq, int node)
+{
+ struct irq_cfg *cfg;
+ unsigned long flags;
+ int ret;
+
+ cfg = alloc_irq_cfg(irq, node);
+ if (!cfg)
+ return -ENOMEM;
+
+ raw_spin_lock_irqsave(&vector_lock, flags);
+ ret = __assign_irq_vector(irq, cfg, apic->target_cpus());
+ raw_spin_unlock_irqrestore(&vector_lock, flags);
+
+ if (!ret)
+ irq_set_chip_data(irq, cfg);
+ else
+ free_irq_cfg(irq, cfg);
+ return ret;
+}
+
+void arch_teardown_hwirq(unsigned int irq)
+{
+ struct irq_cfg *cfg = irq_cfg(irq);
+
+ free_remapped_irq(irq);
+ clear_irq_vector(irq, cfg);
+ free_irq_cfg(irq, cfg);
+}
+
+static void __init print_APIC_field(int base)
+{
+ int i;
+
+ printk(KERN_DEBUG);
+
+ for (i = 0; i < 8; i++)
+ pr_cont("%08x", apic_read(base + i*0x10));
+
+ pr_cont("\n");
+}
+
+static void __init print_local_APIC(void *dummy)
+{
+ unsigned int i, v, ver, maxlvt;
+ u64 icr;
+
+ printk(KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
+ smp_processor_id(), hard_smp_processor_id());
+ v = apic_read(APIC_ID);
+ printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, read_apic_id());
+ v = apic_read(APIC_LVR);
+ printk(KERN_INFO "... APIC VERSION: %08x\n", v);
+ ver = GET_APIC_VERSION(v);
+ maxlvt = lapic_get_maxlvt();
+
+ v = apic_read(APIC_TASKPRI);
+ printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n",
+ v, v & APIC_TPRI_MASK);
+
+ /* !82489DX */
+ if (APIC_INTEGRATED(ver)) {
+ if (!APIC_XAPIC(ver)) {
+ v = apic_read(APIC_ARBPRI);
+ printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
+ v & APIC_ARBPRI_MASK);
+ }
+ v = apic_read(APIC_PROCPRI);
+ printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
+ }
+
+ /*
+ * Remote read supported only in the 82489DX and local APIC for
+ * Pentium processors.
+ */
+ if (!APIC_INTEGRATED(ver) || maxlvt == 3) {
+ v = apic_read(APIC_RRR);
+ printk(KERN_DEBUG "... APIC RRR: %08x\n", v);
+ }
+
+ v = apic_read(APIC_LDR);
+ printk(KERN_DEBUG "... APIC LDR: %08x\n", v);
+ if (!x2apic_enabled()) {
+ v = apic_read(APIC_DFR);
+ printk(KERN_DEBUG "... APIC DFR: %08x\n", v);
+ }
+ v = apic_read(APIC_SPIV);
+ printk(KERN_DEBUG "... APIC SPIV: %08x\n", v);
+
+ printk(KERN_DEBUG "... APIC ISR field:\n");
+ print_APIC_field(APIC_ISR);
+ printk(KERN_DEBUG "... APIC TMR field:\n");
+ print_APIC_field(APIC_TMR);
+ printk(KERN_DEBUG "... APIC IRR field:\n");
+ print_APIC_field(APIC_IRR);
+
+ /* !82489DX */
+ if (APIC_INTEGRATED(ver)) {
+ /* Due to the Pentium erratum 3AP. */
+ if (maxlvt > 3)
+ apic_write(APIC_ESR, 0);
+
+ v = apic_read(APIC_ESR);
+ printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
+ }
+
+ icr = apic_icr_read();
+ printk(KERN_DEBUG "... APIC ICR: %08x\n", (u32)icr);
+ printk(KERN_DEBUG "... APIC ICR2: %08x\n", (u32)(icr >> 32));
+
+ v = apic_read(APIC_LVTT);
+ printk(KERN_DEBUG "... APIC LVTT: %08x\n", v);
+
+ if (maxlvt > 3) {
+ /* PC is LVT#4. */
+ v = apic_read(APIC_LVTPC);
+ printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v);
+ }
+ v = apic_read(APIC_LVT0);
+ printk(KERN_DEBUG "... APIC LVT0: %08x\n", v);
+ v = apic_read(APIC_LVT1);
+ printk(KERN_DEBUG "... APIC LVT1: %08x\n", v);
+
+ if (maxlvt > 2) {
+ /* ERR is LVT#3. */
+ v = apic_read(APIC_LVTERR);
+ printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v);
+ }
+
+ v = apic_read(APIC_TMICT);
+ printk(KERN_DEBUG "... APIC TMICT: %08x\n", v);
+ v = apic_read(APIC_TMCCT);
+ printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v);
+ v = apic_read(APIC_TDCR);
+ printk(KERN_DEBUG "... APIC TDCR: %08x\n", v);
+
+ if (boot_cpu_has(X86_FEATURE_EXTAPIC)) {
+ v = apic_read(APIC_EFEAT);
+ maxlvt = (v >> 16) & 0xff;
+ printk(KERN_DEBUG "... APIC EFEAT: %08x\n", v);
+ v = apic_read(APIC_ECTRL);
+ printk(KERN_DEBUG "... APIC ECTRL: %08x\n", v);
+ for (i = 0; i < maxlvt; i++) {
+ v = apic_read(APIC_EILVTn(i));
+ printk(KERN_DEBUG "... APIC EILVT%d: %08x\n", i, v);
+ }
+ }
+ pr_cont("\n");
+}
+
+static void __init print_local_APICs(int maxcpu)
+{
+ int cpu;
+
+ if (!maxcpu)
+ return;
+
+ preempt_disable();
+ for_each_online_cpu(cpu) {
+ if (cpu >= maxcpu)
+ break;
+ smp_call_function_single(cpu, print_local_APIC, NULL, 1);
+ }
+ preempt_enable();
+}
+
+static void __init print_PIC(void)
+{
+ unsigned int v;
+ unsigned long flags;
+
+ if (!nr_legacy_irqs())
+ return;
+
+ printk(KERN_DEBUG "\nprinting PIC contents\n");
+
+ raw_spin_lock_irqsave(&i8259A_lock, flags);
+
+ v = inb(0xa1) << 8 | inb(0x21);
+ printk(KERN_DEBUG "... PIC IMR: %04x\n", v);
+
+ v = inb(0xa0) << 8 | inb(0x20);
+ printk(KERN_DEBUG "... PIC IRR: %04x\n", v);
+
+ outb(0x0b, 0xa0);
+ outb(0x0b, 0x20);
+ v = inb(0xa0) << 8 | inb(0x20);
+ outb(0x0a, 0xa0);
+ outb(0x0a, 0x20);
+
+ raw_spin_unlock_irqrestore(&i8259A_lock, flags);
+
+ printk(KERN_DEBUG "... PIC ISR: %04x\n", v);
+
+ v = inb(0x4d1) << 8 | inb(0x4d0);
+ printk(KERN_DEBUG "... PIC ELCR: %04x\n", v);
+}
+
+static int show_lapic __initdata = 1;
+static __init int setup_show_lapic(char *arg)
+{
+ int num = -1;
+
+ if (strcmp(arg, "all") == 0) {
+ show_lapic = CONFIG_NR_CPUS;
+ } else {
+ get_option(&arg, &num);
+ if (num >= 0)
+ show_lapic = num;
+ }
+
+ return 1;
+}
+__setup("show_lapic=", setup_show_lapic);
+
+static int __init print_ICs(void)
+{
+ if (apic_verbosity == APIC_QUIET)
+ return 0;
+
+ print_PIC();
+
+ /* don't print out if apic is not there */
+ if (!cpu_has_apic && !apic_from_smp_config())
+ return 0;
+
+ print_local_APICs(show_lapic);
+ print_IO_APICs();
+
+ return 0;
+}
+
+late_initcall(print_ICs);
x86_init.irqs.intr_init();
}
-/*
- * Setup the vector to irq mappings.
- */
-void setup_vector_irq(int cpu)
-{
-#ifndef CONFIG_X86_IO_APIC
- int irq;
-
- /*
- * On most of the platforms, legacy PIC delivers the interrupts on the
- * boot cpu. But there are certain platforms where PIC interrupts are
- * delivered to multiple cpu's. If the legacy IRQ is handled by the
- * legacy PIC, for the new cpu that is coming online, setup the static
- * legacy vector to irq mapping:
- */
- for (irq = 0; irq < nr_legacy_irqs(); irq++)
- per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq;
-#endif
-
- __setup_vector_irq(cpu);
-}
-
static void __init smp_intr_init(void)
{
#ifdef CONFIG_SMP
projects / cascardo / linux.git / commitdiff