1 #ifndef _M68K_IRQ_H_ 2 #define _M68K_IRQ_H_ 3 4 /* 5 * This should be the same as the max(NUM_X_SOURCES) for all the 6 * different m68k hosts compiled into the kernel. 7 * Currently the Atari has 72 and the Amiga 24, but if both are 8 * supported in the kernel it is better to make room for 72. 9 */ 10 #if defined(CONFIG_COLDFIRE) 11 #define NR_IRQS 256 12 #elif defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X) 13 #define NR_IRQS 200 14 #elif defined(CONFIG_ATARI) || defined(CONFIG_MAC) 15 #define NR_IRQS 72 16 #elif defined(CONFIG_Q40) 17 #define NR_IRQS 43 18 #elif defined(CONFIG_AMIGA) || !defined(CONFIG_MMU) 19 #define NR_IRQS 32 20 #elif defined(CONFIG_APOLLO) 21 #define NR_IRQS 24 22 #elif defined(CONFIG_HP300) 23 #define NR_IRQS 8 24 #else 25 #define NR_IRQS 0 26 #endif 27 28 #ifdef CONFIG_MMU 29 30 #include <linux/linkage.h> 31 #include <linux/hardirq.h> 32 #include <linux/irqreturn.h> 33 #include <linux/spinlock_types.h> 34 35 /* 36 * Interrupt source definitions 37 * General interrupt sources are the level 1-7. 38 * Adding an interrupt service routine for one of these sources 39 * results in the addition of that routine to a chain of routines. 40 * Each one is called in succession. Each individual interrupt 41 * service routine should determine if the device associated with 42 * that routine requires service. 43 */ 44 45 #define IRQ_SPURIOUS 0 46 47 #define IRQ_AUTO_1 1 /* level 1 interrupt */ 48 #define IRQ_AUTO_2 2 /* level 2 interrupt */ 49 #define IRQ_AUTO_3 3 /* level 3 interrupt */ 50 #define IRQ_AUTO_4 4 /* level 4 interrupt */ 51 #define IRQ_AUTO_5 5 /* level 5 interrupt */ 52 #define IRQ_AUTO_6 6 /* level 6 interrupt */ 53 #define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */ 54 55 #define IRQ_USER 8 56 57 extern unsigned int irq_canonicalize(unsigned int irq); 58 59 struct pt_regs; 60 61 /* 62 * various flags for request_irq() - the Amiga now uses the standard 63 * mechanism like all other architectures - IRQF_DISABLED and 64 * IRQF_SHARED are your friends. 65 */ 66 #ifndef MACH_AMIGA_ONLY 67 #define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */ 68 #define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */ 69 #define IRQ_FLG_FAST (0x0004) 70 #define IRQ_FLG_SLOW (0x0008) 71 #define IRQ_FLG_STD (0x8000) /* internally used */ 72 #endif 73 74 /* 75 * This structure is used to chain together the ISRs for a particular 76 * interrupt source (if it supports chaining). 77 */ 78 typedef struct irq_node { 79 irqreturn_t (*handler)(int, void *); 80 void *dev_id; 81 struct irq_node *next; 82 unsigned long flags; 83 const char *devname; 84 } irq_node_t; 85 86 /* 87 * This structure has only 4 elements for speed reasons 88 */ 89 struct irq_handler { 90 int (*handler)(int, void *); 91 unsigned long flags; 92 void *dev_id; 93 const char *devname; 94 }; 95 96 struct irq_controller { 97 const char *name; 98 spinlock_t lock; 99 int (*startup)(unsigned int irq); 100 void (*shutdown)(unsigned int irq); 101 void (*enable)(unsigned int irq); 102 void (*disable)(unsigned int irq); 103 }; 104 105 extern int m68k_irq_startup(unsigned int); 106 extern void m68k_irq_shutdown(unsigned int); 107 108 /* 109 * This function returns a new irq_node_t 110 */ 111 extern irq_node_t *new_irq_node(void); 112 113 extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)); 114 extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt, 115 void (*handler)(unsigned int, struct pt_regs *)); 116 extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int); 117 118 asmlinkage void m68k_handle_int(unsigned int); 119 asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *); 120 121 #else 122 #define irq_canonicalize(irq) (irq) 123 #endif /* CONFIG_MMU */ 124 125 asmlinkage void do_IRQ(int irq, struct pt_regs *regs); 126 127 #endif /* _M68K_IRQ_H_ */ 128