arch/sparc/include/asm/irq_64.h

   1 /* irq.h: IRQ registers on the 64-bit Sparc.
   2  *
   3  * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
   4  * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
   5  */
   6
   7 #ifndef _SPARC64_IRQ_H
   8 #define _SPARC64_IRQ_H
   9
  10 #include <linux/linkage.h>
  11 #include <linux/kernel.h>
  12 #include <linux/errno.h>
  13 #include <linux/interrupt.h>
  14 #include <asm/pil.h>
  15 #include <asm/ptrace.h>
  16
  17 /* IMAP/ICLR register defines */
  18 #define IMAP_VALID              0x80000000UL    /* IRQ Enabled          */
  19 #define IMAP_TID_UPA            0x7c000000UL    /* UPA TargetID         */
  20 #define IMAP_TID_JBUS           0x7c000000UL    /* JBUS TargetID        */
  21 #define IMAP_TID_SHIFT          26
  22 #define IMAP_AID_SAFARI         0x7c000000UL    /* Safari AgentID       */
  23 #define IMAP_AID_SHIFT          26
  24 #define IMAP_NID_SAFARI         0x03e00000UL    /* Safari NodeID        */
  25 #define IMAP_NID_SHIFT          21
  26 #define IMAP_IGN                0x000007c0UL    /* IRQ Group Number     */
  27 #define IMAP_INO                0x0000003fUL    /* IRQ Number           */
  28 #define IMAP_INR                0x000007ffUL    /* Full interrupt number*/
  29
  30 #define ICLR_IDLE               0x00000000UL    /* Idle state           */
  31 #define ICLR_TRANSMIT           0x00000001UL    /* Transmit state       */
  32 #define ICLR_PENDING            0x00000003UL    /* Pending state        */
  33
  34 /* The largest number of unique interrupt sources we support.
  35  * If this needs to ever be larger than 255, you need to change
  36  * the type of ino_bucket->virt_irq as appropriate.
  37  *
  38  * ino_bucket->virt_irq allocation is made during {sun4v_,}build_irq().
  39  */
  40 #define NR_IRQS    255
  41
  42 extern void irq_install_pre_handler(int virt_irq,
  43                                     void (*func)(unsigned int, void *, void *),
  44                                     void *arg1, void *arg2);
  45 #define irq_canonicalize(irq)   (irq)
  46 extern unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap);
  47 extern unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino);
  48 extern unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino);
  49 extern unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p,
  50                                     unsigned int msi_devino_start,
  51                                     unsigned int msi_devino_end);
  52 extern void sun4v_destroy_msi(unsigned int virt_irq);
  53 extern unsigned int sun4u_build_msi(u32 portid, unsigned int *virt_irq_p,
  54                                     unsigned int msi_devino_start,
  55                                     unsigned int msi_devino_end,
  56                                     unsigned long imap_base,
  57                                     unsigned long iclr_base);
  58 extern void sun4u_destroy_msi(unsigned int virt_irq);
  59 extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
  60
  61 extern unsigned char virt_irq_alloc(unsigned int dev_handle,
  62                                     unsigned int dev_ino);
  63 #ifdef CONFIG_PCI_MSI
  64 extern void virt_irq_free(unsigned int virt_irq);
  65 #endif
  66
  67 extern void __init init_IRQ(void);
  68 extern void fixup_irqs(void);
  69
  70 static inline void set_softint(unsigned long bits)
  71 {
  72         __asm__ __volatile__("wr        %0, 0x0, %%set_softint"
  73                              : /* No outputs */
  74                              : "r" (bits));
  75 }
  76
  77 static inline void clear_softint(unsigned long bits)
  78 {
  79         __asm__ __volatile__("wr        %0, 0x0, %%clear_softint"
  80                              : /* No outputs */
  81                              : "r" (bits));
  82 }
  83
  84 static inline unsigned long get_softint(void)
  85 {
  86         unsigned long retval;
  87
  88         __asm__ __volatile__("rd        %%softint, %0"
  89                              : "=r" (retval));
  90         return retval;
  91 }
  92
  93 void __trigger_all_cpu_backtrace(void);
  94 #define trigger_all_cpu_backtrace() __trigger_all_cpu_backtrace()
  95
  96 extern void *hardirq_stack[NR_CPUS];
  97 extern void *softirq_stack[NR_CPUS];
  98 #define __ARCH_HAS_DO_SOFTIRQ
  99
 100 #endif