LXR linux/arch/ia64/include/asm/hw

   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
  19typedef u8 ia64_vector;
  20#else
  21typedef 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 */
  59extern int ia64_first_device_vector;
  60extern 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 */
  92enum {
  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
 100extern __u8 isa_irq_to_vector_map[16];
 101#define isa_irq_to_vector(x)    isa_irq_to_vector_map[(x)]
 102
 103struct 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};
 110extern spinlock_t vector_lock;
 111extern struct irq_cfg irq_cfg[NR_IRQS];
 112#define irq_to_domain(x)        irq_cfg[(x)].domain
 113DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq);
 114
 115extern 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
 127extern void ia64_native_register_ipi(void);
 128extern int bind_irq_vector(int irq, int vector, cpumask_t domain);
 129extern int ia64_native_assign_irq_vector (int irq);     /* allocate a free vector */
 130extern void ia64_native_free_irq_vector (int vector);
 131extern int reserve_irq_vector (int vector);
 132extern void __setup_vector_irq(int cpu);
 133extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
 134extern void ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action);
 135extern int check_irq_used (int irq);
 136extern void destroy_and_reserve_irq (unsigned int irq);
 137
 138#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG))
 139extern int irq_prepare_move(int irq, int cpu);
 140extern void irq_complete_move(unsigned int irq);
 141#else
 142static inline int irq_prepare_move(int irq, int cpu) { return 0; }
 143static inline void irq_complete_move(unsigned int irq) {}
 144#endif
 145
 146static inline void ia64_native_resend_irq(unsigned int vector)
 147{
 148        platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
 149}
 150
 151/*
 152 * Default implementations for the irq-descriptor API:
 153 */
 154#ifndef CONFIG_IA64_GENERIC
 155static inline ia64_vector __ia64_irq_to_vector(int irq)
 156{
 157        return irq_cfg[irq].vector;
 158}
 159
 160static inline unsigned int
 161__ia64_local_vector_to_irq (ia64_vector vec)
 162{
 163        return __get_cpu_var(vector_irq)[vec];
 164}
 165#endif
 166
 167/*
 168 * Next follows the irq descriptor interface.  On IA-64, each CPU supports 256 interrupt
 169 * vectors.  On smaller systems, there is a one-to-one correspondence between interrupt
 170 * vectors and the Linux irq numbers.  However, larger systems may have multiple interrupt
 171 * domains meaning that the translation from vector number to irq number depends on the
 172 * interrupt domain that a CPU belongs to.  This API abstracts such platform-dependent
 173 * differences and provides a uniform means to translate between vector and irq numbers
 174 * and to obtain the irq descriptor for a given irq number.
 175 */
 176
 177/* Extract the IA-64 vector that corresponds to IRQ.  */
 178static inline ia64_vector
 179irq_to_vector (int irq)
 180{
 181        return platform_irq_to_vector(irq);
 182}
 183
 184/*
 185 * Convert the local IA-64 vector to the corresponding irq number.  This translation is
 186 * done in the context of the interrupt domain that the currently executing CPU belongs
 187 * to.
 188 */
 189static inline unsigned int
 190local_vector_to_irq (ia64_vector vec)
 191{
 192        return platform_local_vector_to_irq(vec);
 193}
 194
 195#endif /* _ASM_IA64_HW_IRQ_H */
 196