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 SUN4M_HARD_INT(x)       (0x000000001 << (x))
  14 #define SUN4M_SOFT_INT(x)       (0x000010000 << (x))
  15
  16 #define SUN4D_MAX_BOARD 10
  17 #define SUN4D_MAX_IRQ ((SUN4D_MAX_BOARD + 2) << 5)
  18
  19 /* Map between the irq identifier used in hw to the
  20  * irq_bucket. The map is sufficient large to hold
  21  * the sun4d hw identifiers.
  22  */
  23 extern struct irq_bucket *irq_map[SUN4D_MAX_IRQ];
  24
  25
  26 /* sun4m specific type definitions */
  27
  28 /* This maps direct to CPU specific interrupt registers */
  29 struct sun4m_irq_percpu {
  30         u32     pending;
  31         u32     clear;
  32         u32     set;
  33 };
  34
  35 /* This maps direct to global interrupt registers */
  36 struct sun4m_irq_global {
  37         u32     pending;
  38         u32     mask;
  39         u32     mask_clear;
  40         u32     mask_set;
  41         u32     interrupt_target;
  42 };
  43
  44 extern struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
  45 extern struct sun4m_irq_global __iomem *sun4m_irq_global;
  46
  47 /* The following definitions describe the individual platform features: */
  48 #define FEAT_L10_CLOCKSOURCE (1 << 0) /* L10 timer is used as a clocksource */
  49 #define FEAT_L10_CLOCKEVENT  (1 << 1) /* L10 timer is used as a clockevent */
  50 #define FEAT_L14_ONESHOT     (1 << 2) /* L14 timer clockevent can oneshot */
  51
  52 /*
  53  * Platform specific configuration
  54  * The individual platforms assign their platform
  55  * specifics in their init functions.
  56  */
  57 struct sparc_config {
  58         void (*init_timers)(void);
  59         unsigned int (*build_device_irq)(struct platform_device *op,
  60                                          unsigned int real_irq);
  61
  62         /* generic clockevent features - see FEAT_* above */
  63         int features;
  64
  65         /* clock rate used for clock event timer */
  66         int clock_rate;
  67
  68         /* one period for clock source timer */
  69         unsigned int cs_period;
  70
  71         /* function to obtain offsett for cs period */
  72         unsigned int (*get_cycles_offset)(void);
  73 };
  74 extern struct sparc_config sparc_config;
  75
  76 unsigned int irq_alloc(unsigned int real_irq, unsigned int pil);
  77 void irq_link(unsigned int irq);
  78 void irq_unlink(unsigned int irq);
  79 void handler_irq(unsigned int pil, struct pt_regs *regs);
  80
  81 /* Dave Redman (djhr@tadpole.co.uk)
  82  * changed these to function pointers.. it saves cycles and will allow
  83  * the irq dependencies to be split into different files at a later date
  84  * sun4m_irq.c etc so we could reduce the kernel size.
  85  * Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  86  * Changed these to btfixup entities... It saves cycles :)
  87  */
  88
  89 BTFIXUPDEF_CALL(void, clear_clock_irq, void)
  90 BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
  91
  92 static inline void clear_clock_irq(void)
  93 {
  94         BTFIXUP_CALL(clear_clock_irq)();
  95 }
  96
  97 static inline void load_profile_irq(int cpu, int limit)
  98 {
  99         BTFIXUP_CALL(load_profile_irq)(cpu, limit);
 100 }
 101
 102 unsigned long leon_get_irqmask(unsigned int irq);
 103
 104 #ifdef CONFIG_SMP
 105
 106 /* All SUN4D IPIs are sent on this IRQ, may be shared with hard IRQs */
 107 #define SUN4D_IPI_IRQ 13
 108
 109 extern void sun4d_ipi_interrupt(void);
 110
 111 #endif