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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_IA64_HW_IRQ_H
#define _ASM_IA64_HW_IRQ_H
/*
* Copyright (C) 2001-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/profile.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 AUTO_ASSIGN -1
#define IA64_SPURIOUS_INT_VECTOR 0x0f
/*
* Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
*/
#define IA64_CPEP_VECTOR 0x1c /* corrected platform error polling vector */
#define IA64_CMCP_VECTOR 0x1d /* corrected machine-check polling vector */
#define IA64_CPE_VECTOR 0x1e /* corrected platform error interrupt vector */
#define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */
/*
* Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
* Use vectors 0x30-0xe7 as the default device vector range for ia64.
* Platforms may choose to reduce this range in platform_irq_setup, but the
* platform range must fall within
* [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR]
*/
extern int ia64_first_device_vector;
extern int ia64_last_device_vector;
#ifdef CONFIG_SMP
/* Reserve the lower priority vector than device vectors for "move IRQ" IPI */
#define IA64_IRQ_MOVE_VECTOR 0x30 /* "move IRQ" IPI */
#define IA64_DEF_FIRST_DEVICE_VECTOR 0x31
#else
#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30
#endif
#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7
#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector
#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector
#define IA64_MAX_DEVICE_VECTORS (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1)
#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
#define IA64_PERFMON_VECTOR 0xee /* performance 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_LOCAL_TLB_FLUSH 0xfc /* SMP flush local TLB */
#define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */
#define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */
/* Used for encoding redirected irqs */
#define IA64_IRQ_REDIRECTED (1 << 31)
/* 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)]
struct irq_cfg {
ia64_vector vector;
cpumask_t domain;
cpumask_t old_domain;
unsigned move_cleanup_count;
u8 move_in_progress : 1;
};
extern spinlock_t vector_lock;
extern struct irq_cfg irq_cfg[NR_IRQS];
#define irq_to_domain(x) irq_cfg[(x)].domain
DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq);
extern struct irq_chip irq_type_ia64_lsapic; /* CPU-internal interrupt controller */
#define ia64_register_ipi ia64_native_register_ipi
#define assign_irq_vector ia64_native_assign_irq_vector
#define free_irq_vector ia64_native_free_irq_vector
#define ia64_resend_irq ia64_native_resend_irq
extern void ia64_native_register_ipi(void);
extern int bind_irq_vector(int irq, int vector, cpumask_t domain);
extern int ia64_native_assign_irq_vector (int irq); /* allocate a free vector */
extern void ia64_native_free_irq_vector (int vector);
extern int reserve_irq_vector (int vector);
extern void __setup_vector_irq(int cpu);
extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
extern void destroy_and_reserve_irq (unsigned int irq);
#ifdef CONFIG_SMP
extern int irq_prepare_move(int irq, int cpu);
extern void irq_complete_move(unsigned int irq);
#else
static inline int irq_prepare_move(int irq, int cpu) { return 0; }
static inline void irq_complete_move(unsigned int irq) {}
#endif
static inline void ia64_native_resend_irq(unsigned int vector)
{
ia64_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
}
/*
* 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.
*/
/* Extract the IA-64 vector that corresponds to IRQ. */
static inline ia64_vector
irq_to_vector (int irq)
{
return irq_cfg[irq].vector;
}
/*
* 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 __this_cpu_read(vector_irq[vec]);
}
#endif /* _ASM_IA64_HW_IRQ_H */
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