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#ifndef _ASM_HW_IRQ_H #define _ASM_HW_IRQ_H /* * linux/include/asm/hw_irq.h * * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar * * moved some of the old arch/i386/kernel/irq.h to here. VY * * IRQ/IPI changes taken from work by Thomas Radke * <tomsoft@informatik.tu-chemnitz.de> * * hacked by Andi Kleen for x86-64. * * $Id: hw_irq.h,v 1.24 2001/09/14 20:55:03 vojtech Exp $ */ #ifndef __ASSEMBLY__ #include <linux/config.h> #include <asm/atomic.h> #include <asm/irq.h> #include <linux/profile.h> #include <linux/smp.h> struct hw_interrupt_type; #endif #define NMI_VECTOR 0x02 /* * IDT vectors usable for external interrupt sources start * at 0x20: */ #define FIRST_EXTERNAL_VECTOR 0x20 #define IA32_SYSCALL_VECTOR 0x80 /* * Vectors 0x20-0x2f are used for ISA interrupts. */ /* * Special IRQ vectors used by the SMP architecture, 0xf0-0xff * * 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 SPURIOUS_APIC_VECTOR 0xff #define ERROR_APIC_VECTOR 0xfe #define RESCHEDULE_VECTOR 0xfd #define CALL_FUNCTION_VECTOR 0xfc /* fb free - please don't readd KDB here because it's useless (hint - think what a NMI bit does to a vector) */ #define THERMAL_APIC_VECTOR 0xfa #define THRESHOLD_APIC_VECTOR 0xf9 /* f8 free */ #define INVALIDATE_TLB_VECTOR_END 0xf7 #define INVALIDATE_TLB_VECTOR_START 0xf0 /* f0-f7 used for TLB flush */ #define NUM_INVALIDATE_TLB_VECTORS 8 /* * Local APIC timer IRQ vector is on a different priority level, * to work around the 'lost local interrupt if more than 2 IRQ * sources per level' errata. */ #define LOCAL_TIMER_VECTOR 0xef /* * First APIC vector available to drivers: (vectors 0x30-0xee) * we start at 0x31 to spread out vectors evenly between priority * levels. (0x80 is the syscall vector) */ #define FIRST_DEVICE_VECTOR 0x31 #define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */ #ifndef __ASSEMBLY__ extern u8 irq_vector[NR_IRQ_VECTORS]; #define IO_APIC_VECTOR(irq) (irq_vector[irq]) #define AUTO_ASSIGN -1 /* * Various low-level irq details needed by irq.c, process.c, * time.c, io_apic.c and smp.c * * Interrupt entry/exit code at both C and assembly level */ 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 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 void disable_IO_APIC(void); extern void print_IO_APIC(void); extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn); extern void send_IPI(int dest, int vector); extern void setup_ioapic_dest(void); extern unsigned long io_apic_irqs; extern atomic_t irq_err_count; extern atomic_t irq_mis_count; #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs)) #define __STR(x) #x #define STR(x) __STR(x) #include <asm/ptrace.h> #define IRQ_NAME2(nr) nr##_interrupt(void) #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr) /* * SMP has a few special interrupts for IPI messages */ #define BUILD_IRQ(nr) \ asmlinkage void IRQ_NAME(nr); \ __asm__( \ "\n.p2align\n" \ "IRQ" #nr "_interrupt:\n\t" \ "push $" #nr "-256 ; " \ "jmp common_interrupt"); #if defined(CONFIG_X86_IO_APIC) 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 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {} #endif #define platform_legacy_irq(irq) ((irq) < 16) #endif #endif /* _ASM_HW_IRQ_H */