arch/sparc/kernel/irq.h

   1 #include <linux/platform_device.h>
   2
   3 #include <asm/btfixup.h>
   4 #include <asm/cpu_type.h>
   5
   6 struct irq_bucket {
   7         struct irq_bucket *next;
   8         unsigned int real_irq;
   9         unsigned int irq;
  10         unsigned int pil;
  11 };
  12
  13 #define SUN4D_MAX_BOARD 10
  14 #define SUN4D_MAX_IRQ ((SUN4D_MAX_BOARD + 2) << 5)
  15
  16 /* Map between the irq identifier used in hw to the
  17  * irq_bucket. The map is sufficient large to hold
  18  * the sun4d hw identifiers.
  19  */
  20 extern struct irq_bucket *irq_map[SUN4D_MAX_IRQ];
  21
  22
  23 /* sun4m specific type definitions */
  24
  25 /* This maps direct to CPU specific interrupt registers */
  26 struct sun4m_irq_percpu {
  27         u32     pending;
  28         u32     clear;
  29         u32     set;
  30 };
  31
  32 /* This maps direct to global interrupt registers */
  33 struct sun4m_irq_global {
  34         u32     pending;
  35         u32     mask;
  36         u32     mask_clear;
  37         u32     mask_set;
  38         u32     interrupt_target;
  39 };
  40
  41 extern struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
  42 extern struct sun4m_irq_global __iomem *sun4m_irq_global;
  43
  44 /* The following definitions describe the individual platform features: */
  45 #define FEAT_L10_CLOCKSOURCE (1 << 0) /* L10 timer is used as a clocksource */
  46 #define FEAT_L10_CLOCKEVENT  (1 << 1) /* L10 timer is used as a clockevent */
  47 #define FEAT_L14_ONESHOT     (1 << 2) /* L14 timer clockevent can oneshot */
  48
  49 /*
  50  * Platform specific configuration
  51  * The individual platforms assign their platform
  52  * specifics in their init functions.
  53  */
  54 struct sparc_config {
  55         void (*init_timers)(void);
  56         unsigned int (*build_device_irq)(struct platform_device *op,
  57                                          unsigned int real_irq);
  58
  59         /* generic clockevent features - see FEAT_* above */
  60         int features;
  61
  62         /* clock rate used for clock event timer */
  63         int clock_rate;
  64
  65         /* one period for clock source timer */
  66         unsigned int cs_period;
  67
  68         /* function to obtain offsett for cs period */
  69         unsigned int (*get_cycles_offset)(void);
  70 };
  71 extern struct sparc_config sparc_config;
  72
  73 unsigned int irq_alloc(unsigned int real_irq, unsigned int pil);
  74 void irq_link(unsigned int irq);
  75 void irq_unlink(unsigned int irq);
  76 void handler_irq(unsigned int pil, struct pt_regs *regs);
  77
  78 /* Dave Redman (djhr@tadpole.co.uk)
  79  * changed these to function pointers.. it saves cycles and will allow
  80  * the irq dependencies to be split into different files at a later date
  81  * sun4m_irq.c etc so we could reduce the kernel size.
  82  * Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  83  * Changed these to btfixup entities... It saves cycles :)
  84  */
  85
  86 BTFIXUPDEF_CALL(void, clear_clock_irq, void)
  87 BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
  88
  89 static inline void clear_clock_irq(void)
  90 {
  91         BTFIXUP_CALL(clear_clock_irq)();
  92 }
  93
  94 static inline void load_profile_irq(int cpu, int limit)
  95 {
  96         BTFIXUP_CALL(load_profile_irq)(cpu, limit);
  97 }
  98
  99 #ifdef CONFIG_SMP
 100 BTFIXUPDEF_CALL(void, set_cpu_int, int, int)
 101 BTFIXUPDEF_CALL(void, clear_cpu_int, int, int)
 102 BTFIXUPDEF_CALL(void, set_irq_udt, int)
 103
 104 #define set_cpu_int(cpu,level) BTFIXUP_CALL(set_cpu_int)(cpu,level)
 105 #define clear_cpu_int(cpu,level) BTFIXUP_CALL(clear_cpu_int)(cpu,level)
 106 #define set_irq_udt(cpu) BTFIXUP_CALL(set_irq_udt)(cpu)
 107
 108 /* All SUN4D IPIs are sent on this IRQ, may be shared with hard IRQs */
 109 #define SUN4D_IPI_IRQ 13
 110
 111 extern void sun4d_ipi_interrupt(void);
 112
 113 #endif