kernel/arch/ia64/include/asm/iosapic.h

   1 #ifndef __ASM_IA64_IOSAPIC_H
   2 #define __ASM_IA64_IOSAPIC_H
   3
   4 #define IOSAPIC_REG_SELECT      0x0
   5 #define IOSAPIC_WINDOW          0x10
   6 #define IOSAPIC_EOI             0x40
   7
   8 #define IOSAPIC_VERSION         0x1
   9
  10 /*
  11  * Redirection table entry
  12  */
  13 #define IOSAPIC_RTE_LOW(i)      (0x10+i*2)
  14 #define IOSAPIC_RTE_HIGH(i)     (0x11+i*2)
  15
  16 #define IOSAPIC_DEST_SHIFT              16
  17
  18 /*
  19  * Delivery mode
  20  */
  21 #define IOSAPIC_DELIVERY_SHIFT          8
  22 #define IOSAPIC_FIXED                   0x0
  23 #define IOSAPIC_LOWEST_PRIORITY 0x1
  24 #define IOSAPIC_PMI                     0x2
  25 #define IOSAPIC_NMI                     0x4
  26 #define IOSAPIC_INIT                    0x5
  27 #define IOSAPIC_EXTINT                  0x7
  28
  29 /*
  30  * Interrupt polarity
  31  */
  32 #define IOSAPIC_POLARITY_SHIFT          13
  33 #define IOSAPIC_POL_HIGH                0
  34 #define IOSAPIC_POL_LOW         1
  35
  36 /*
  37  * Trigger mode
  38  */
  39 #define IOSAPIC_TRIGGER_SHIFT           15
  40 #define IOSAPIC_EDGE                    0
  41 #define IOSAPIC_LEVEL                   1
  42
  43 /*
  44  * Mask bit
  45  */
  46
  47 #define IOSAPIC_MASK_SHIFT              16
  48 #define IOSAPIC_MASK                    (1<<IOSAPIC_MASK_SHIFT)
  49
  50 #define IOSAPIC_VECTOR_MASK             0xffffff00
  51
  52 #ifndef __ASSEMBLY__
  53
  54 #ifdef CONFIG_IOSAPIC
  55
  56 #define NR_IOSAPICS                     256
  57
  58 #ifdef CONFIG_PARAVIRT_GUEST
  59 #include <asm/paravirt.h>
  60 #else
  61 #define iosapic_pcat_compat_init        ia64_native_iosapic_pcat_compat_init
  62 #define __iosapic_read                  __ia64_native_iosapic_read
  63 #define __iosapic_write                 __ia64_native_iosapic_write
  64 #define iosapic_get_irq_chip            ia64_native_iosapic_get_irq_chip
  65 #endif
  66
  67 extern void __init ia64_native_iosapic_pcat_compat_init(void);
  68 extern struct irq_chip *ia64_native_iosapic_get_irq_chip(unsigned long trigger);
  69
  70 static inline unsigned int
  71 __ia64_native_iosapic_read(char __iomem *iosapic, unsigned int reg)
  72 {
  73         writel(reg, iosapic + IOSAPIC_REG_SELECT);
  74         return readl(iosapic + IOSAPIC_WINDOW);
  75 }
  76
  77 static inline void
  78 __ia64_native_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
  79 {
  80         writel(reg, iosapic + IOSAPIC_REG_SELECT);
  81         writel(val, iosapic + IOSAPIC_WINDOW);
  82 }
  83
  84 static inline void iosapic_eoi(char __iomem *iosapic, u32 vector)
  85 {
  86         writel(vector, iosapic + IOSAPIC_EOI);
  87 }
  88
  89 extern void __init iosapic_system_init (int pcat_compat);
  90 extern int iosapic_init (unsigned long address, unsigned int gsi_base);
  91 extern int iosapic_remove (unsigned int gsi_base);
  92 extern int gsi_to_irq (unsigned int gsi);
  93 extern int iosapic_register_intr (unsigned int gsi, unsigned long polarity,
  94                                   unsigned long trigger);
  95 extern void iosapic_unregister_intr (unsigned int irq);
  96 extern void iosapic_override_isa_irq (unsigned int isa_irq, unsigned int gsi,
  97                                       unsigned long polarity,
  98                                       unsigned long trigger);
  99 extern int __init iosapic_register_platform_intr (u32 int_type,
 100                                            unsigned int gsi,
 101                                            int pmi_vector,
 102                                            u16 eid, u16 id,
 103                                            unsigned long polarity,
 104                                            unsigned long trigger);
 105
 106 #ifdef CONFIG_NUMA
 107 extern void map_iosapic_to_node (unsigned int, int);
 108 #endif
 109 #else
 110 #define iosapic_system_init(pcat_compat)                        do { } while (0)
 111 #define iosapic_init(address,gsi_base)                          (-EINVAL)
 112 #define iosapic_remove(gsi_base)                                (-ENODEV)
 113 #define iosapic_register_intr(gsi,polarity,trigger)             (gsi)
 114 #define iosapic_unregister_intr(irq)                            do { } while (0)
 115 #define iosapic_override_isa_irq(isa_irq,gsi,polarity,trigger)  do { } while (0)
 116 #define iosapic_register_platform_intr(type,gsi,pmi,eid,id, \
 117         polarity,trigger)                                       (gsi)
 118 #endif
 119
 120 # endif /* !__ASSEMBLY__ */
 121 #endif /* __ASM_IA64_IOSAPIC_H */