| /* |
| * This file should contain #defines for all of the interrupt vector |
| * numbers used by this architecture. |
| * |
| * In addition, there are some standard defines: |
| * |
| * FIRST_EXTERNAL_VECTOR: |
| * The first free place for external interrupts |
| * |
| * SYSCALL_VECTOR: |
| * The IRQ vector a syscall makes the user to kernel transition |
| * under. |
| * |
| * TIMER_IRQ: |
| * The IRQ number the timer interrupt comes in at. |
| * |
| * NR_IRQS: |
| * The total number of interrupt vectors (including all the |
| * architecture specific interrupts) needed. |
| * |
| */ |
| #ifndef _ASM_IRQ_VECTORS_H |
| #define _ASM_IRQ_VECTORS_H |
| |
| /* |
| * IDT vectors usable for external interrupt sources start |
| * at 0x20: |
| */ |
| #define FIRST_EXTERNAL_VECTOR 0x20 |
| |
| #define 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. |
| * |
| * Vectors 0xf0-0xfa are free (reserved for future Linux use). |
| */ |
| #define SPURIOUS_APIC_VECTOR 0xff |
| #define ERROR_APIC_VECTOR 0xfe |
| #define INVALIDATE_TLB_VECTOR 0xfd |
| #define RESCHEDULE_VECTOR 0xfc |
| #define CALL_FUNCTION_VECTOR 0xfb |
| |
| #define THERMAL_APIC_VECTOR 0xf0 |
| /* |
| * 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 |
| |
| #define TIMER_IRQ 0 |
| |
| /* |
| * 16 8259A IRQ's, 208 potential APIC interrupt sources. |
| * Right now the APIC is mostly only used for SMP. |
| * 256 vectors is an architectural limit. (we can have |
| * more than 256 devices theoretically, but they will |
| * have to use shared interrupts) |
| * Since vectors 0x00-0x1f are used/reserved for the CPU, |
| * the usable vector space is 0x20-0xff (224 vectors) |
| */ |
| |
| /* |
| * The maximum number of vectors supported by i386 processors |
| * is limited to 256. For processors other than i386, NR_VECTORS |
| * should be changed accordingly. |
| */ |
| #define NR_VECTORS 256 |
| |
| #include "irq_vectors_limits.h" |
| |
| #define FPU_IRQ 13 |
| |
| #define FIRST_VM86_IRQ 3 |
| #define LAST_VM86_IRQ 15 |
| #define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15) |
| |
| |
| #endif /* _ASM_IRQ_VECTORS_H */ |
