diff options
Diffstat (limited to 'include/asm-x86/hw_irq_64.h')
| -rw-r--r-- | include/asm-x86/hw_irq_64.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/include/asm-x86/hw_irq_64.h b/include/asm-x86/hw_irq_64.h new file mode 100644 index 0000000..09dfc18 --- /dev/null +++ b/include/asm-x86/hw_irq_64.h @@ -0,0 +1,175 @@ +#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. + */ + +#ifndef __ASSEMBLY__ +#include <asm/atomic.h> +#include <asm/irq.h> +#include <linux/profile.h> +#include <linux/smp.h> +#include <linux/percpu.h> +#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 + + +/* Reserve the lowest usable priority level 0x20 - 0x2f for triggering + * cleanup after irq migration. + */ +#define IRQ_MOVE_CLEANUP_VECTOR FIRST_EXTERNAL_VECTOR + +/* + * Vectors 0x30-0x3f are used for ISA interrupts. + */ +#define IRQ0_VECTOR FIRST_EXTERNAL_VECTOR + 0x10 +#define IRQ1_VECTOR IRQ0_VECTOR + 1 +#define IRQ2_VECTOR IRQ0_VECTOR + 2 +#define IRQ3_VECTOR IRQ0_VECTOR + 3 +#define IRQ4_VECTOR IRQ0_VECTOR + 4 +#define IRQ5_VECTOR IRQ0_VECTOR + 5 +#define IRQ6_VECTOR IRQ0_VECTOR + 6 +#define IRQ7_VECTOR IRQ0_VECTOR + 7 +#define IRQ8_VECTOR IRQ0_VECTOR + 8 +#define IRQ9_VECTOR IRQ0_VECTOR + 9 +#define IRQ10_VECTOR IRQ0_VECTOR + 10 +#define IRQ11_VECTOR IRQ0_VECTOR + 11 +#define IRQ12_VECTOR IRQ0_VECTOR + 12 +#define IRQ13_VECTOR IRQ0_VECTOR + 13 +#define IRQ14_VECTOR IRQ0_VECTOR + 14 +#define IRQ15_VECTOR IRQ0_VECTOR + 15 + +/* + * 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 0x41 to spread out vectors evenly between priority + * levels. (0x80 is the syscall vector) + */ +#define FIRST_DEVICE_VECTOR (IRQ15_VECTOR + 2) +#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */ + + +#ifndef __ASSEMBLY__ + +/* Interrupt handlers registered during init_IRQ */ +void apic_timer_interrupt(void); +void spurious_interrupt(void); +void error_interrupt(void); +void reschedule_interrupt(void); +void call_function_interrupt(void); +void irq_move_cleanup_interrupt(void); +void invalidate_interrupt0(void); +void invalidate_interrupt1(void); +void invalidate_interrupt2(void); +void invalidate_interrupt3(void); +void invalidate_interrupt4(void); +void invalidate_interrupt5(void); +void invalidate_interrupt6(void); +void invalidate_interrupt7(void); +void thermal_interrupt(void); +void threshold_interrupt(void); +void i8254_timer_resume(void); + +typedef int vector_irq_t[NR_VECTORS]; +DECLARE_PER_CPU(vector_irq_t, vector_irq); +extern void __setup_vector_irq(int cpu); +extern spinlock_t vector_lock; + +/* + * 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 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 ") ; " \ + "jmp common_interrupt"); + +#define platform_legacy_irq(irq) ((irq) < 16) + +#endif + +#endif /* _ASM_HW_IRQ_H */ |