arch/ia64/include/asm/hw_irq.h

   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
  18 typedef 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  */
  55 extern int ia64_first_device_vector;
  56 extern 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_PERFMON_VECTOR             0xee    /* performance monitor interrupt vector */
  73 #define IA64_TIMER_VECTOR               0xef    /* use highest-prio group 15 interrupt for timer */
  74 #define IA64_MCA_WAKEUP_VECTOR          0xf0    /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
  75 #define IA64_IPI_LOCAL_TLB_FLUSH        0xfc    /* SMP flush local TLB */
  76 #define IA64_IPI_RESCHEDULE             0xfd    /* SMP reschedule */
  77 #define IA64_IPI_VECTOR                 0xfe    /* inter-processor interrupt vector */
  78
  79 /* Used for encoding redirected irqs */
  80
  81 #define IA64_IRQ_REDIRECTED             (1 << 31)
  82
  83 /* IA64 inter-cpu interrupt related definitions */
  84
  85 #define IA64_IPI_DEFAULT_BASE_ADDR      0xfee00000
  86
  87 /* Delivery modes for inter-cpu interrupts */
  88 enum {
  89         IA64_IPI_DM_INT =       0x0,    /* pend an external interrupt */
  90         IA64_IPI_DM_PMI =       0x2,    /* pend a PMI */
  91         IA64_IPI_DM_NMI =       0x4,    /* pend an NMI (vector 2) */
  92         IA64_IPI_DM_INIT =      0x5,    /* pend an INIT interrupt */
  93         IA64_IPI_DM_EXTINT =    0x7,    /* pend an 8259-compatible interrupt. */
  94 };
  95
  96 extern __u8 isa_irq_to_vector_map[16];
  97 #define isa_irq_to_vector(x)    isa_irq_to_vector_map[(x)]
  98
  99 struct irq_cfg {
 100         ia64_vector vector;
 101         cpumask_t domain;
 102         cpumask_t old_domain;
 103         unsigned move_cleanup_count;
 104         u8 move_in_progress : 1;
 105 };
 106 extern spinlock_t vector_lock;
 107 extern struct irq_cfg irq_cfg[NR_IRQS];
 108 #define irq_to_domain(x)        irq_cfg[(x)].domain
 109 DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq);
 110
 111 extern struct irq_chip irq_type_ia64_lsapic;    /* CPU-internal interrupt controller */
 112
 113 #define ia64_register_ipi       ia64_native_register_ipi
 114 #define assign_irq_vector       ia64_native_assign_irq_vector
 115 #define free_irq_vector         ia64_native_free_irq_vector
 116 #define register_percpu_irq     ia64_native_register_percpu_irq
 117 #define ia64_resend_irq         ia64_native_resend_irq
 118
 119 extern void ia64_native_register_ipi(void);
 120 extern int bind_irq_vector(int irq, int vector, cpumask_t domain);
 121 extern int ia64_native_assign_irq_vector (int irq);     /* allocate a free vector */
 122 extern void ia64_native_free_irq_vector (int vector);
 123 extern int reserve_irq_vector (int vector);
 124 extern void __setup_vector_irq(int cpu);
 125 extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
 126 extern void ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action);
 127 extern void destroy_and_reserve_irq (unsigned int irq);
 128
 129 #ifdef CONFIG_SMP
 130 extern int irq_prepare_move(int irq, int cpu);
 131 extern void irq_complete_move(unsigned int irq);
 132 #else
 133 static inline int irq_prepare_move(int irq, int cpu) { return 0; }
 134 static inline void irq_complete_move(unsigned int irq) {}
 135 #endif
 136
 137 static inline void ia64_native_resend_irq(unsigned int vector)
 138 {
 139         ia64_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
 140 }
 141
 142 /*
 143  * Next follows the irq descriptor interface.  On IA-64, each CPU supports 256 interrupt
 144  * vectors.  On smaller systems, there is a one-to-one correspondence between interrupt
 145  * vectors and the Linux irq numbers.  However, larger systems may have multiple interrupt
 146  * domains meaning that the translation from vector number to irq number depends on the
 147  * interrupt domain that a CPU belongs to.  This API abstracts such platform-dependent
 148  * differences and provides a uniform means to translate between vector and irq numbers
 149  * and to obtain the irq descriptor for a given irq number.
 150  */
 151
 152 /* Extract the IA-64 vector that corresponds to IRQ.  */
 153 static inline ia64_vector
 154 irq_to_vector (int irq)
 155 {
 156         return irq_cfg[irq].vector;
 157 }
 158
 159 /*
 160  * Convert the local IA-64 vector to the corresponding irq number.  This translation is
 161  * done in the context of the interrupt domain that the currently executing CPU belongs
 162  * to.
 163  */
 164 static inline unsigned int
 165 local_vector_to_irq (ia64_vector vec)
 166 {
 167         return __this_cpu_read(vector_irq[vec]);
 168 }
 169
 170 #endif /* _ASM_IA64_HW_IRQ_H */