1 #ifndef _M68K_IRQ_H_ 2 #define _M68K_IRQ_H_ 3 4 #include <linux/linkage.h> 5 #include <linux/hardirq.h> 6 #include <linux/spinlock_types.h> 7 8 /* 9 * This should be the same as the max(NUM_X_SOURCES) for all the 10 * different m68k hosts compiled into the kernel. 11 * Currently the Atari has 72 and the Amiga 24, but if both are 12 * supported in the kernel it is better to make room for 72. 13 */ 14 #if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X) 15 #define NR_IRQS 200 16 #elif defined(CONFIG_ATARI) || defined(CONFIG_MAC) 17 #define NR_IRQS 72 18 #elif defined(CONFIG_Q40) 19 #define NR_IRQS 43 20 #elif defined(CONFIG_AMIGA) 21 #define NR_IRQS 32 22 #elif defined(CONFIG_APOLLO) 23 #define NR_IRQS 24 24 #elif defined(CONFIG_HP300) 25 #define NR_IRQS 8 26 #else 27 #define NR_IRQS 0 28 #endif 29 30 /* 31 * The hardirq mask has to be large enough to have 32 * space for potentially all IRQ sources in the system 33 * nesting on a single CPU: 34 */ 35 #if (1 << HARDIRQ_BITS) < NR_IRQS 36 # error HARDIRQ_BITS is too low! 37 #endif 38 39 /* 40 * Interrupt source definitions 41 * General interrupt sources are the level 1-7. 42 * Adding an interrupt service routine for one of these sources 43 * results in the addition of that routine to a chain of routines. 44 * Each one is called in succession. Each individual interrupt 45 * service routine should determine if the device associated with 46 * that routine requires service. 47 */ 48 49 #define IRQ_SPURIOUS 0 50 51 #define IRQ_AUTO_1 1 /* level 1 interrupt */ 52 #define IRQ_AUTO_2 2 /* level 2 interrupt */ 53 #define IRQ_AUTO_3 3 /* level 3 interrupt */ 54 #define IRQ_AUTO_4 4 /* level 4 interrupt */ 55 #define IRQ_AUTO_5 5 /* level 5 interrupt */ 56 #define IRQ_AUTO_6 6 /* level 6 interrupt */ 57 #define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */ 58 59 #define IRQ_USER 8 60 61 extern unsigned int irq_canonicalize(unsigned int irq); 62 63 struct pt_regs; 64 65 /* 66 * various flags for request_irq() - the Amiga now uses the standard 67 * mechanism like all other architectures - IRQF_DISABLED and 68 * IRQF_SHARED are your friends. 69 */ 70 #ifndef MACH_AMIGA_ONLY 71 #define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */ 72 #define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */ 73 #define IRQ_FLG_FAST (0x0004) 74 #define IRQ_FLG_SLOW (0x0008) 75 #define IRQ_FLG_STD (0x8000) /* internally used */ 76 #endif 77 78 /* 79 * This structure is used to chain together the ISRs for a particular 80 * interrupt source (if it supports chaining). 81 */ 82 typedef struct irq_node { 83 int (*handler)(int, void *); 84 void *dev_id; 85 struct irq_node *next; 86 unsigned long flags; 87 const char *devname; 88 } irq_node_t; 89 90 /* 91 * This structure has only 4 elements for speed reasons 92 */ 93 struct irq_handler { 94 int (*handler)(int, void *); 95 unsigned long flags; 96 void *dev_id; 97 const char *devname; 98 }; 99 100 struct irq_controller { 101 const char *name; 102 spinlock_t lock; 103 int (*startup)(unsigned int irq); 104 void (*shutdown)(unsigned int irq); 105 void (*enable)(unsigned int irq); 106 void (*disable)(unsigned int irq); 107 }; 108 109 extern int m68k_irq_startup(unsigned int); 110 extern void m68k_irq_shutdown(unsigned int); 111 112 /* 113 * This function returns a new irq_node_t 114 */ 115 extern irq_node_t *new_irq_node(void); 116 117 extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)); 118 extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt, 119 void (*handler)(unsigned int, struct pt_regs *)); 120 extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int); 121 122 asmlinkage void m68k_handle_int(unsigned int); 123 asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *); 124 125 #endif /* _M68K_IRQ_H_ */ 126