1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_IA64_HW_IRQ_H 3#define _ASM_IA64_HW_IRQ_H 4 5/* 6 * Copyright (C) 2001-2003 Hewlett-Packard Co 7 * David Mosberger-Tang <davidm@hpl.hp.com> 8 */ 9 10#include <linux/interrupt.h> 11#include <linux/sched.h> 12#include <linux/types.h> 13#include <linux/profile.h> 14 15#include <asm/ptrace.h> 16#include <asm/smp.h> 17 18typedef u8 ia64_vector; 19 20/* 21 * 0 special 22 * 23 * 1,3-14 are reserved from firmware 24 * 25 * 16-255 (vectored external interrupts) are available 26 * 27 * 15 spurious interrupt (see IVR) 28 * 29 * 16 lowest priority, 255 highest priority 30 * 31 * 15 classes of 16 interrupts each. 32 */ 33#define IA64_MIN_VECTORED_IRQ 16 34#define IA64_MAX_VECTORED_IRQ 255 35#define IA64_NUM_VECTORS 256 36 37#define AUTO_ASSIGN -1 38 39#define IA64_SPURIOUS_INT_VECTOR 0x0f 40 41/* 42 * Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI. 43 */ 44#define IA64_CPEP_VECTOR 0x1c /* corrected platform error polling vector */ 45#define IA64_CMCP_VECTOR 0x1d /* corrected machine-check polling vector */ 46#define IA64_CPE_VECTOR 0x1e /* corrected platform error interrupt vector */ 47#define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */ 48/* 49 * Vectors 0x20-0x2f are reserved for legacy ISA IRQs. 50 * Use vectors 0x30-0xe7 as the default device vector range for ia64. 51 * Platforms may choose to reduce this range in platform_irq_setup, but the 52 * platform range must fall within 53 * [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR] 54 */ 55extern int ia64_first_device_vector; 56extern int ia64_last_device_vector; 57 58#ifdef CONFIG_SMP 59/* Reserve the lower priority vector than device vectors for "move IRQ" IPI */ 60#define IA64_IRQ_MOVE_VECTOR 0x30 /* "move IRQ" IPI */ 61#define IA64_DEF_FIRST_DEVICE_VECTOR 0x31 62#else 63#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30 64#endif 65#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7 66#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector 67#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector 68#define IA64_MAX_DEVICE_VECTORS (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1) 69#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1) 70 71#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */ 72#define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */ 73#define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */ 74#define IA64_IPI_LOCAL_TLB_FLUSH 0xfc /* SMP flush local TLB */ 75#define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */ 76#define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */ 77 78/* Used for encoding redirected irqs */ 79 80#define IA64_IRQ_REDIRECTED (1 << 31) 81 82/* IA64 inter-cpu interrupt related definitions */ 83 84#define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000 85 86/* Delivery modes for inter-cpu interrupts */ 87enum { 88 IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */ 89 IA64_IPI_DM_PMI = 0x2, /* pend a PMI */ 90 IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */ 91 IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */ 92 IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */ 93}; 94 95extern __u8 isa_irq_to_vector_map[16]; 96#define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)] 97 98struct irq_cfg { 99 ia64_vector vector; 100 cpumask_t domain; 101 cpumask_t old_domain; 102 unsigned move_cleanup_count; 103 u8 move_in_progress : 1; 104}; 105extern spinlock_t vector_lock; 106extern struct irq_cfg irq_cfg[NR_IRQS]; 107#define irq_to_domain(x) irq_cfg[(x)].domain 108DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq); 109 110extern struct irq_chip irq_type_ia64_lsapic; /* CPU-internal interrupt controller */ 111 112#define ia64_register_ipi ia64_native_register_ipi 113#define assign_irq_vector ia64_native_assign_irq_vector 114#define free_irq_vector ia64_native_free_irq_vector 115#define ia64_resend_irq ia64_native_resend_irq 116 117extern void ia64_native_register_ipi(void); 118extern int bind_irq_vector(int irq, int vector, cpumask_t domain); 119extern int ia64_native_assign_irq_vector (int irq); /* allocate a free vector */ 120extern void ia64_native_free_irq_vector (int vector); 121extern int reserve_irq_vector (int vector); 122extern void __setup_vector_irq(int cpu); 123extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect); 124extern void destroy_and_reserve_irq (unsigned int irq); 125 126#ifdef CONFIG_SMP 127extern int irq_prepare_move(int irq, int cpu); 128extern void irq_complete_move(unsigned int irq); 129#else 130static inline int irq_prepare_move(int irq, int cpu) { return 0; } 131static inline void irq_complete_move(unsigned int irq) {} 132#endif 133 134static inline void ia64_native_resend_irq(unsigned int vector) 135{ 136 ia64_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0); 137} 138 139/* 140 * Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt 141 * vectors. On smaller systems, there is a one-to-one correspondence between interrupt 142 * vectors and the Linux irq numbers. However, larger systems may have multiple interrupt 143 * domains meaning that the translation from vector number to irq number depends on the 144 * interrupt domain that a CPU belongs to. This API abstracts such platform-dependent 145 * differences and provides a uniform means to translate between vector and irq numbers 146 * and to obtain the irq descriptor for a given irq number. 147 */ 148 149/* Extract the IA-64 vector that corresponds to IRQ. */ 150static inline ia64_vector 151irq_to_vector (int irq) 152{ 153 return irq_cfg[irq].vector; 154} 155 156/* 157 * Convert the local IA-64 vector to the corresponding irq number. This translation is 158 * done in the context of the interrupt domain that the currently executing CPU belongs 159 * to. 160 */ 161static inline unsigned int 162local_vector_to_irq (ia64_vector vec) 163{ 164 return __this_cpu_read(vector_irq[vec]); 165} 166 167#endif /* _ASM_IA64_HW_IRQ_H */ 168