arch/ia64/include/asm/hw_irq.h

   1 #ifndef _ASM_IA64_HW_IRQ_H
   2 #define _ASM_IA64_HW_IRQ_H
   3
   4 /*
   5  * Copyright (C) 2001-2003 Hewlett-Packard Co
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  */
   8
   9 #include <linux/interrupt.h>
  10 #include <linux/sched.h>
  11 #include <linux/types.h>
  12 #include <linux/profile.h>
  13
  14 #include <asm/machvec.h>
  15 #include <asm/ptrace.h>
  16 #include <asm/smp.h>
  17
  18 #ifndef CONFIG_PARAVIRT
  19 typedef u8 ia64_vector;
  20 #else
  21 typedef u16 ia64_vector;
  22 #endif
  23
  24 /*
  25  * 0 special
  26  *
  27  * 1,3-14 are reserved from firmware
  28  *
  29  * 16-255 (vectored external interrupts) are available
  30  *
  31  * 15 spurious interrupt (see IVR)
  32  *
  33  * 16 lowest priority, 255 highest priority
  34  *
  35  * 15 classes of 16 interrupts each.
  36  */
  37 #define IA64_MIN_VECTORED_IRQ            16
  38 #define IA64_MAX_VECTORED_IRQ           255
  39 #define IA64_NUM_VECTORS                256
  40
  41 #define AUTO_ASSIGN                     -1
  42
  43 #define IA64_SPURIOUS_INT_VECTOR        0x0f
  44
  45 /*
  46  * Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
  47  */
  48 #define IA64_CPEP_VECTOR                0x1c    /* corrected platform error polling vector */
  49 #define IA64_CMCP_VECTOR                0x1d    /* corrected machine-check polling vector */
  50 #define IA64_CPE_VECTOR                 0x1e    /* corrected platform error interrupt vector */
  51 #define IA64_CMC_VECTOR                 0x1f    /* corrected machine-check interrupt vector */
  52 /*
  53  * Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
  54  * Use vectors 0x30-0xe7 as the default device vector range for ia64.
  55  * Platforms may choose to reduce this range in platform_irq_setup, but the
  56  * platform range must fall within
  57  *      [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR]
  58  */
  59 extern int ia64_first_device_vector;
  60 extern int ia64_last_device_vector;
  61
  62 #if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined (CONFIG_IA64_DIG))
  63 /* Reserve the lower priority vector than device vectors for "move IRQ" IPI */
  64 #define IA64_IRQ_MOVE_VECTOR            0x30    /* "move IRQ" IPI */
  65 #define IA64_DEF_FIRST_DEVICE_VECTOR    0x31
  66 #else
  67 #define IA64_DEF_FIRST_DEVICE_VECTOR    0x30
  68 #endif
  69 #define IA64_DEF_LAST_DEVICE_VECTOR     0xe7
  70 #define IA64_FIRST_DEVICE_VECTOR        ia64_first_device_vector
  71 #define IA64_LAST_DEVICE_VECTOR         ia64_last_device_vector
  72 #define IA64_MAX_DEVICE_VECTORS         (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1)
  73 #define IA64_NUM_DEVICE_VECTORS         (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
  74
  75 #define IA64_MCA_RENDEZ_VECTOR          0xe8    /* MCA rendez interrupt */
  76 #define IA64_PERFMON_VECTOR             0xee    /* performance monitor interrupt vector */
  77 #define IA64_TIMER_VECTOR               0xef    /* use highest-prio group 15 interrupt for timer */
  78 #define IA64_MCA_WAKEUP_VECTOR          0xf0    /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
  79 #define IA64_IPI_LOCAL_TLB_FLUSH        0xfc    /* SMP flush local TLB */
  80 #define IA64_IPI_RESCHEDULE             0xfd    /* SMP reschedule */
  81 #define IA64_IPI_VECTOR                 0xfe    /* inter-processor interrupt vector */
  82
  83 /* Used for encoding redirected irqs */
  84
  85 #define IA64_IRQ_REDIRECTED             (1 << 31)
  86
  87 /* IA64 inter-cpu interrupt related definitions */
  88
  89 #define IA64_IPI_DEFAULT_BASE_ADDR      0xfee00000
  90
  91 /* Delivery modes for inter-cpu interrupts */
  92 enum {
  93         IA64_IPI_DM_INT =       0x0,    /* pend an external interrupt */
  94         IA64_IPI_DM_PMI =       0x2,    /* pend a PMI */
  95         IA64_IPI_DM_NMI =       0x4,    /* pend an NMI (vector 2) */
  96         IA64_IPI_DM_INIT =      0x5,    /* pend an INIT interrupt */
  97         IA64_IPI_DM_EXTINT =    0x7,    /* pend an 8259-compatible interrupt. */
  98 };
  99
 100 extern __u8 isa_irq_to_vector_map[16];
 101 #define isa_irq_to_vector(x)    isa_irq_to_vector_map[(x)]
 102
 103 struct irq_cfg {
 104         ia64_vector vector;
 105         cpumask_t domain;
 106         cpumask_t old_domain;
 107         unsigned move_cleanup_count;
 108         u8 move_in_progress : 1;
 109 };
 110 extern spinlock_t vector_lock;
 111 extern struct irq_cfg irq_cfg[NR_IRQS];
 112 #define irq_to_domain(x)        irq_cfg[(x)].domain
 113 DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq);
 114
 115 extern struct irq_chip irq_type_ia64_lsapic;    /* CPU-internal interrupt controller */
 116
 117 #ifdef CONFIG_PARAVIRT_GUEST
 118 #include <asm/paravirt.h>
 119 #else
 120 #define ia64_register_ipi       ia64_native_register_ipi
 121 #define assign_irq_vector       ia64_native_assign_irq_vector
 122 #define free_irq_vector         ia64_native_free_irq_vector
 123 #define register_percpu_irq     ia64_native_register_percpu_irq
 124 #define ia64_resend_irq         ia64_native_resend_irq
 125 #endif
 126
 127 extern void ia64_native_register_ipi(void);
 128 extern int bind_irq_vector(int irq, int vector, cpumask_t domain);
 129 extern int ia64_native_assign_irq_vector (int irq);     /* allocate a free vector */
 130 extern void ia64_native_free_irq_vector (int vector);
 131 extern int reserve_irq_vector (int vector);
 132 extern void __setup_vector_irq(int cpu);
 133 extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
 134 extern void ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action);
 135 extern void destroy_and_reserve_irq (unsigned int irq);
 136
 137 #if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG))
 138 extern int irq_prepare_move(int irq, int cpu);
 139 extern void irq_complete_move(unsigned int irq);
 140 #else
 141 static inline int irq_prepare_move(int irq, int cpu) { return 0; }
 142 static inline void irq_complete_move(unsigned int irq) {}
 143 #endif
 144
 145 static inline void ia64_native_resend_irq(unsigned int vector)
 146 {
 147         platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
 148 }
 149
 150 /*
 151  * Default implementations for the irq-descriptor API:
 152  */
 153 #ifndef CONFIG_IA64_GENERIC
 154 static inline ia64_vector __ia64_irq_to_vector(int irq)
 155 {
 156         return irq_cfg[irq].vector;
 157 }
 158
 159 static inline unsigned int
 160 __ia64_local_vector_to_irq (ia64_vector vec)
 161 {
 162         return __this_cpu_read(vector_irq[vec]);
 163 }
 164 #endif
 165
 166 /*
 167  * Next follows the irq descriptor interface.  On IA-64, each CPU supports 256 interrupt
 168  * vectors.  On smaller systems, there is a one-to-one correspondence between interrupt
 169  * vectors and the Linux irq numbers.  However, larger systems may have multiple interrupt
 170  * domains meaning that the translation from vector number to irq number depends on the
 171  * interrupt domain that a CPU belongs to.  This API abstracts such platform-dependent
 172  * differences and provides a uniform means to translate between vector and irq numbers
 173  * and to obtain the irq descriptor for a given irq number.
 174  */
 175
 176 /* Extract the IA-64 vector that corresponds to IRQ.  */
 177 static inline ia64_vector
 178 irq_to_vector (int irq)
 179 {
 180         return platform_irq_to_vector(irq);
 181 }
 182
 183 /*
 184  * Convert the local IA-64 vector to the corresponding irq number.  This translation is
 185  * done in the context of the interrupt domain that the currently executing CPU belongs
 186  * to.
 187  */
 188 static inline unsigned int
 189 local_vector_to_irq (ia64_vector vec)
 190 {
 191         return platform_local_vector_to_irq(vec);
 192 }
 193
 194 #endif /* _ASM_IA64_HW_IRQ_H */