hw_irq.h
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上传日期:2013-02-24
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- #ifndef _ASM_IA64_HW_IRQ_H
- #define _ASM_IA64_HW_IRQ_H
- /*
- * Copyright (C) 2001 Hewlett-Packard Co
- * Copyright (C) 2001 David Mosberger-Tang <davidm@hpl.hp.com>
- */
- #include <linux/sched.h>
- #include <linux/types.h>
- #include <asm/machvec.h>
- #include <asm/ptrace.h>
- #include <asm/smp.h>
- typedef u8 ia64_vector;
- /*
- * 0 special
- *
- * 1,3-14 are reserved from firmware
- *
- * 16-255 (vectored external interrupts) are available
- *
- * 15 spurious interrupt (see IVR)
- *
- * 16 lowest priority, 255 highest priority
- *
- * 15 classes of 16 interrupts each.
- */
- #define IA64_MIN_VECTORED_IRQ 16
- #define IA64_MAX_VECTORED_IRQ 255
- #define IA64_NUM_VECTORS 256
- #define IA64_SPURIOUS_INT_VECTOR 0x0f
- /*
- * Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
- */
- #define IA64_PCE_VECTOR 0x1e /* platform corrected error interrupt vector */
- #define IA64_CMC_VECTOR 0x1f /* correctable machine-check interrupt vector */
- /*
- * Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
- */
- #define IA64_FIRST_DEVICE_VECTOR 0x30
- #define IA64_LAST_DEVICE_VECTOR 0xe7
- #define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
- #define IA64_PERFMON_VECTOR 0xee /* performanc monitor interrupt vector */
- #define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */
- #define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
- #define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */
- #define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */
- /* IA64 inter-cpu interrupt related definitions */
- #define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000
- /* Delivery modes for inter-cpu interrupts */
- enum {
- IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */
- IA64_IPI_DM_PMI = 0x2, /* pend a PMI */
- IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */
- IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */
- IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */
- };
- extern __u8 isa_irq_to_vector_map[16];
- #define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)]
- extern unsigned long ipi_base_addr;
- extern struct hw_interrupt_type irq_type_ia64_lsapic; /* CPU-internal interrupt controller */
- extern int ia64_alloc_irq (void); /* allocate a free irq */
- extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
- extern void register_percpu_irq (ia64_vector vec, struct irqaction *action);
- static inline void
- hw_resend_irq (struct hw_interrupt_type *h, unsigned int vector)
- {
- platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
- }
- /*
- * Default implementations for the irq-descriptor API:
- */
- extern struct irq_desc _irq_desc[NR_IRQS];
- static inline struct irq_desc *
- __ia64_irq_desc (unsigned int irq)
- {
- return _irq_desc + irq;
- }
- static inline ia64_vector
- __ia64_irq_to_vector (unsigned int irq)
- {
- return (ia64_vector) irq;
- }
- static inline unsigned int
- __ia64_local_vector_to_irq (ia64_vector vec)
- {
- return (unsigned int) vec;
- }
- /*
- * Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt
- * vectors. On smaller systems, there is a one-to-one correspondence between interrupt
- * vectors and the Linux irq numbers. However, larger systems may have multiple interrupt
- * domains meaning that the translation from vector number to irq number depends on the
- * interrupt domain that a CPU belongs to. This API abstracts such platform-dependent
- * differences and provides a uniform means to translate between vector and irq numbers
- * and to obtain the irq descriptor for a given irq number.
- */
- /* Return a pointer to the irq descriptor for IRQ. */
- static inline struct irq_desc *
- irq_desc (int irq)
- {
- return platform_irq_desc(irq);
- }
- /* Extract the IA-64 vector that corresponds to IRQ. */
- static inline ia64_vector
- irq_to_vector (int irq)
- {
- return platform_irq_to_vector(irq);
- }
- /*
- * Convert the local IA-64 vector to the corresponding irq number. This translation is
- * done in the context of the interrupt domain that the currently executing CPU belongs
- * to.
- */
- static inline unsigned int
- local_vector_to_irq (ia64_vector vec)
- {
- return platform_local_vector_to_irq(vec);
- }
- #endif /* _ASM_IA64_HW_IRQ_H */