diff options
Diffstat (limited to 'include/asm-i386/hw_irq.h')
| -rw-r--r-- | include/asm-i386/hw_irq.h | 44 |
1 files changed, 27 insertions, 17 deletions
diff --git a/include/asm-i386/hw_irq.h b/include/asm-i386/hw_irq.h index 8cce40151..894055a7d 100644 --- a/include/asm-i386/hw_irq.h +++ b/include/asm-i386/hw_irq.h @@ -27,33 +27,40 @@ */ /* - * Special IRQ vectors used by the SMP architecture: + * Special IRQ vectors used by the SMP architecture, 0x30-0x4f * - * (some of the following vectors are 'rare', they are merged - * into a single vector (FUNCTION_VECTOR) to save vector space. - * TLB, reschedule and local APIC vectors are performance-critical.) + * some of the following vectors are 'rare', they are merged + * into a single vector (CALL_FUNCTION_VECTOR) to save vector space. + * TLB, reschedule and local APIC vectors are performance-critical. */ -#define RESCHEDULE_VECTOR 0x30 -#define INVALIDATE_TLB_VECTOR 0x31 -#define STOP_CPU_VECTOR 0x40 -#define LOCAL_TIMER_VECTOR 0x41 -#define CALL_FUNCTION_VECTOR 0x50 +#define INVALIDATE_TLB_VECTOR 0x30 +#define LOCAL_TIMER_VECTOR 0x31 +#define RESCHEDULE_VECTOR 0x40 + +/* 'rare' vectors: */ +#define CALL_FUNCTION_VECTOR 0x41 /* - * First APIC vector available to drivers: (vectors 0x51-0xfe) + * These IRQs should never really happen on perfect hardware running + * a perfect kernel, but we nevertheless print a message to catch the + * rest ;) Subtle, the APIC architecture mandates the spurious vector + * to have bits 0-3 set to 1. Note that these vectors do not occur + * normally, so we violate the 'only 2 vectors per priority level' + * rule here. */ -#define IRQ0_TRAP_VECTOR 0x51 +#define SPURIOUS_APIC_VECTOR 0x3f +#define ERROR_APIC_VECTOR 0x43 /* - * This IRQ should never happen, but we print a message nevertheless. + * First APIC vector available to drivers: (vectors 0x51-0xfe) + * we start at 0x51 to spread out vectors between priority levels + * evenly. (note that 0x80 is the syscall vector) */ -#define SPURIOUS_APIC_VECTOR 0xff +#define IRQ0_TRAP_VECTOR 0x51 extern int irq_vector[NR_IRQS]; #define IO_APIC_VECTOR(irq) irq_vector[irq] -extern void init_IRQ_SMP(void); - /* * Various low-level irq details needed by irq.c, process.c, * time.c, io_apic.c and smp.c @@ -65,18 +72,20 @@ extern void no_action(int cpl, void *dev_id, struct pt_regs *regs); extern void mask_irq(unsigned int irq); extern void unmask_irq(unsigned int irq); extern void disable_8259A_irq(unsigned int irq); +extern void enable_8259A_irq(unsigned int irq); extern int i8259A_irq_pending(unsigned int irq); -extern void ack_APIC_irq(void); +extern void make_8259A_irq(unsigned int irq); +extern void init_8259A(int aeoi); extern void FASTCALL(send_IPI_self(int vector)); extern void init_VISWS_APIC_irqs(void); extern void setup_IO_APIC(void); extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn); -extern void make_8259A_irq(unsigned int irq); extern void send_IPI(int dest, int vector); extern void init_pic_mode(void); extern void print_IO_APIC(void); extern unsigned long io_apic_irqs; +extern volatile unsigned long irq_err_count; extern char _stext, _etext; @@ -214,6 +223,7 @@ static inline void x86_do_profile (unsigned long eip) #ifdef __SMP__ /*more of this file should probably be ifdefed SMP */ static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) { + if (IO_APIC_IRQ(i)) send_IPI_self(IO_APIC_VECTOR(i)); } #else |